British Standard Flanges

Size: 1/2″ thru 24″ or custom size.
Material: Nickel Alloy，Hastelloy Alloy,Monel Alloy,Inconel Allo, Anti-Corrosion Resistant Alloy, Super-Alloy, Duplex Steel, Stainless steel, Titanium Alloy, Copper Alloy, Carbon Steel, Aluminium Steel, ect.
Standard: A WWA C207, ASME B16.5, DIN, BS, JIS, EN1092-1, ASME B16.47 and GOST/ГОСТ Standard, etc..
Approved by CE, RoHs, SGS, BV
Large stock with different sizes

BS Flanges Solutions

BS flanges refer to flanges that conform to the British Standard BS 10:1962 specification. These flanges are commonly used in the United Kingdom and other parts of Europe, and they are designed to be used with pipes that conform to the British Standard BS 4504:1967 specification. The BS 10 specification covers flanges in a range of sizes and pressure ratings, from small (size 3) flanges with a pressure rating of 150 pounds per square inch (psi) to large (size 48) flanges with a pressure rating of 2500 psi. Some common types of BS flanges include welding neck flanges, slip-on flanges, and blind flanges. Welding neck flanges are designed to be welded to the neck of a pipe, while slip-on flanges are designed to be slipped over the end of a pipe and then welded in place. Blind flanges are used to seal off the end of a pipe, and they do not have a bore (hole) in the center. If you need to connect pipes using BS flanges, it is important to ensure that the flanges you use are compatible with the pipes and meet the required pressure rating. You should also carefully follow the manufacturer’s instructions for installation and use to ensure that the flanges are installed properly and provide a reliable, leak-free seal.

What are British Standard Flanges?

British Standard Flanges (BS Flanges) are flanges that conform to the dimensional and pressure-rating standards set by the British Standards Institution (BSI). These flanges are commonly used in the UK, Europe, and other countries that have adopted British standards for pipe fittings.

Standard Specication For British Standard Flanges

Dimensions: ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Size : 1/2″ (15 NB) to 48″ (1200NB)
Class : 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.
DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629,
DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638, DIN2673
BS : BS4504 , BS4504, BS1560, BS10
Flange Face Type : Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

Advantages and disadvantage of British Standard Flanges

Some of the benefits of British Standard flanges include compatibility with other flanges and fittings that meet BS standards and the ability to handle high pressure and high temperature applications. They are also known for their durability and reliability, and are widely available in a variety of sizes and materials. A disadvantage of British Standard flanges is that they may not be compatible with pipe flanges and fittings from other countries that use different size and pressure class standards. This can make it difficult to connect British Standard flanges to piping or other components manufactured outside of the UK. In addition, some users may find that the variety of sizes and materials available may make it difficult to select the right flange for a particular application.

What are the different types of British Standard Flanges?

There are several different types of BS Flanges, including Weld Neck Flanges, Slip-On Flanges, Blind Flanges, Threaded Flanges, and Socket Weld Flanges. Each type of flange is designed for a specific application and has unique characteristics that make it suitable for different types of piping systems.

Weld Neck Flanges are designed for high-pressure applications and are used to connect pipes or other piping components. They have a long, tapered neck that is welded to the pipe or fitting, providing added strength and stability.
Slip-On Flanges are similar to Weld Neck Flanges, but they do not have a tapered neck. Instead, they have a short, flat collar that is welded to the pipe or fitting. These flanges are suitable for low- to medium-pressure applications.
Blind Flanges are used to close off the end of a pipe or fitting. They have a solid, circular body with no bore or opening, and are often used in applications where the flow of fluid must be stopped or redirected.
Threaded Flanges are designed for use with pipes or fittings that have threads. They have a threaded bore that allows them to be attached to the pipe or fitting using a threaded connection.
Socket Weld Flanges are similar to Threaded Flanges, but they have a socket-shaped bore that allows them to be attached to the pipe or fitting using a socket-weld connection. These flanges are suitable for high-pressure applications.

Material of British Standard Flanges

British Standard flanges are usually made of forged carbon steel or stainless steel. These materials are chosen for their strength and durability, as well as their corrosion resistance. Depending on the specific application, other materials, such as alloy steel, may also be used. It is important to select the right material for a specific application to ensure that the flange can withstand the required pressure and temperature conditions.

Carbon Steel BS 4504 / BS 10 Flanges	ASTM/ASME A/SA105 A/SA105N & A/SA216-WCB, DIN 1.0402, DIN 1.0460, DIN 1.0619, Die Steel, ASTM A105 / ASME SA105, A105N, ASTM A350 LF2 / ASME SA350, High Yield CS ASTM A694 / A694 (F52 F56 F60 F65 F70 F80)
Stainless Steel BS 4504 / BS 10 Flanges	ASTM/ASME A/SA182 F304, F304L, F316, F316L, ASTM/ASME A/SA351 CF8, CF3, CF8M, CF3M, DIN 1.4301, DIN 1.4306, DIN 1.4401, DIN 1.4404, DIN 1.4308, DIN 1.4408, DIN 1.4306, DIN 1.4409
Alloy Steel BS 4504 / BS 10 Flanges	ASTM A182 / ASME SA182 F5, F9, F11, F12, F22, F91
Titanium BS 4504 / BS 10 Flanges	ASTM B381 / ASME SB381, Titanium Gr. 1, Titanium Gr. 2, Titanium Gr. 4, Titanium Gr. 5, Titanium Gr. 7 ASTM R50250/GR.1 \| R50400/GR.2 \| R50550/GR.3 \| R50700/GR.4 \| GR.6 \|R52400/GR.7 \| R53400/GR.12 \| R56320/GR.9 \|R56400/GR.5
Copper BS 4504 / BS 10 Flanges	T1, T2, C10100, C10200, C10300, C10400, C10500, C10700, C10800, C10910,C10920, TP1, TP2, C10930, C11000, C11300, C11400, C11500, C11600, C12000,C12200, C12300, TU1, TU2, C12500, C14200, C14420, C14500, C14510, C14520, C14530, C17200, C19200, C21000, C23000, C26000, C27000, C27400, C28000, C33000, C33200, C37000, C44300, C44400, C44500, C60800, C63020, C68700, C70400, C70600, C70620, C71000, C71500, C71520, C71640, etc
Copper Nickel BS 4504 / BS 10 Flanges	ASTM / ASME SB 61 / 62 / 151 / 152, Copper Nickel 90/10 (C70600 ), Cupro Nickel 70/30 (C71500), UNS C71640
Brass BS 4504 / BS 10 Flanges	3602 / 2604 / H59 / H62 / etc.
Inconel BS 4504 / BS 10 Flanges	ASTM B564 / ASME SB564, Inconel 600, 601, 625, 718, 783, 690, x750
Hastelloy BS 4504 / BS 10 Flanges	ASTM B564 / ASME SB564, Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X
Monel BS 4504 / BS 10 Flanges	ASTM B564 / ASME SB564, Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500)
Alloy 20 BS 4504 / BS 10 Flanges	ASTM B462 / ASME SB462, Carpenter® 20 Alloy, Alloy 20Cb-3
Aluminium BS 4504 / BS 10 Flanges	5052 /6061/ 6063 / 2017 / 7075 / etc.
Nickel BS 4504 / BS 10 Flanges	ASTM B564 / ASME SB564, Nickel 200, Nickel 201, Nickel 205, Nickel 205LC
Duplex BS 4504 / BS 10 Flanges	S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Super Duplex BS 4504 / BS 10 Flanges	S32750 / S32760 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Incoloy BS 4504 / BS 10 Flanges	ASTM B564 / ASME SB564, Incoloy 800, 800H, 800HT (UNS N08800), 825 (UNS N08825), 925
254 Smo BS 4504 / BS 10 Flanges	ASTM A182 / ASME SA182, SMO 254/6Mo, UNS S31254, DIN 1.4547
Nimonic BS 4504 / BS 10 Flanges	Nimonic 75, Nimonic 80A, Nimonic 90
Other BS 4504 / BS 10 Flanges material	Tin bronze, Alumunum bronze, Lead bronze

Size of BS Flanges

There are different types of BS flanges, each with its own size range.The size of the BS flange depends on the size of the pipe or fitting used. For example, a BS4504 flange used with 1″ pipe has a diameter of approximately 1.5″. To determine the exact size of a BS flange, you need to know the type of flange and the size of the pipe or fitting with which it is to be used. The size of a BS flange is usually specified by its nominal size, which is the diameter of the pipe designed to be used with the flange. the nominal size of a BS flange is usually expressed in inches, but can also be expressed in millimeters.

Dimensions of British Standard Flanges

The dimensions of these flanges are usually specified based on BS flange diameter, bolt circle diameter, bolt hole size and flange thickness. The specific dimensions of a particular British Standard flange depend on the size and pressure rating of the flange.

Dimensions of BS 4504 Flange

BS4504 flanges, are flanges that conform to the British Standard BS4504: Section 3.1: 1989, which outlines the specifications for circular flanges for pipes, valves, and fittings. The dimensions of British Standard Flanges are determined by the size of the pipe or fitting to which the flange will be attached, as well as the pressure rating of the flange.

BS 4504 PN2.5 Flange Dimensions

Nom. Size	Flange					Raised Face		Drilling			Bolting	Neck					Bore Diameter
DN	A	C	C1	C2	D1	G	X	No.	I	J		M	F	E	R	T	B
10	75	12	12	12	28	35	2	4	11	50	M10	26	17.2	6	3	1.8	18.0
15	80	12	12	12	30	40	2	4	11	55	M10	30	21.3	6	3	2.0	22.0
20	90	14	14	14	32	50	2	4	11	65	M10	38	26.9	6	4	2.3	27.5
25	100	14	14	14	35	60	2	4	11	75	M10	42	33.7	6	4	2.6	34.5
32	120	14	16	14	35	70	2	4	14	90	M12	55	42.4	6	5	2.6	43.5
40	130	14	16	14	38	80	3	4	14	100	M12	62	48.3	7	5	2.6	49.5
50	140	14	16	14	38	90	3	4	14	110	M12	74	60.3	8	5	2.9	61.5
65	160	14	16	14	38	110	3	4	14	130	M12	88	76.1	9	6	2.9	77.5
80	190	16	18	16	42	128	3	4	18	150	M16	102	88.9	10	6	3.2	90.5
100	210	16	18	16	45	148	3	4	18	170	M16	130	114.3	10	6	3.6	116.0
125	240	18	20	18	48	178	3	8	18	200	M16	155	139.7	10	6	4.0	141.5
150	265	18	20	18	48	202	3	8	18	225	M16	184	168.3	12	8	4.5	170.5
200	320	20	22	20	55	258	3	8	18	280	M16	236	219.1	15	8	5.6	221.5
250	375	22	24	22	60	312	3	12	18	335	M16	290	273.0	15	10	6.3	276.5
300	440	22	24	22	62	365	4	12	22	395	M20	342	323.9	15	10	7.1	327.6
350	490	22	26	22	62	415	4	12	22	445	M20	385	355.6	15	10	7.1	359.0
400	540	22	28	22	65	465	4	16	22	495	M20	438	406.4	15	10	7.1	411.0
450	595	24	30	24	65	520	4	16	22	550	M20	492	457.0	15	12	7.1	462.0
500	645	24	30	24	68	570	4	20	22	600	M20	538	508.0	15	12	7.1	513.5
600	755	24	32	34	70	670	5	20	26	705	M24	640	610.0	16	12	7.1	616.5
700	860	24	36	–	70	–	5	24	26	810	M24	740	711.0	16	12	–	–
800	975	26	38	–	70	–	5	24	30	920	M27	842	813.0	16	12	–	–
900	1075	26	40	–	70	–	5	24	30	1020	M27	942	914.0	16	12	–	–
1000	1175	26	42	–	70	–	5	28	30	1120	M27	1045	1016.0	16	12	–	–
1200	1375	26	44	–	70	–	5	32	30	1320	M27	1245	1220.0	16	16	–	–
1400	1575	26	48	–	70	–	5	36	30	1520	M27	1445	1420.0	16	16	–	–
1600	1790	26	51	–	80	–	5	40	30	1730	M27	1645	1620.0	20	16	–	–
1800	1990	26	54	–	80	–	5	44	30	1930	M27	1845	1820.0	20	16	–	–
2000	2190	26	58	–	80	–	5	48	30	2130	M27	2045	2020.0	22	16	–	–

BS 4504 PN6 Flange Dimensions

Nom. Size	Flange						Raised Face		Boss	Drilling			Bolting	Neck					Bore Diameter
DN	A	C	C1	C2	D	D1	G	X	N	No.	I	J		M	F	E	R	T	B
10	75	12	12	12	20	28	35	2	25	4	11	50	M10	26	17.2	6	3	1.8	18.0
15	80	12	12	12	20	30	40	2	30	4	11	55	M10	30	21.3	6	3	2.0	22.0
20	90	14	14	14	24	32	50	2	40	4	11	65	M10	38	26.9	6	4	2.3	27.5
25	100	14	14	14	24	35	60	2	50	4	11	75	M10	42	33.7	6	4	2.6	34.5
32	120	14	16	14	26	35	70	2	60	4	14	90	M12	55	42.4	6	5	2.6	43.5
40	130	14	16	14	26	38	80	3	70	4	14	100	M12	62	48.3	7	5	2.6	49.5
50	140	14	16	14	28	38	90	3	80	4	14	110	M12	74	60.3	8	5	2.9	61.5
65	160	14	16	14	32	38	110	3	100	4	14	130	M12	88	76.1	9	6	2.9	77.5
80	190	16	18	16	34	42	128	3	110	4	18	150	M16	102	88.9	10	6	3.2	90.5
100	210	16	18	16	40	45	148	3	130	4	18	170	M16	130	114.3	10	6	3.6	116.0
125	240	18	20	18	44	48	178	3	160	8	18	200	M16	155	139.7	10	6	4.0	141.5
150	265	18	20	18	44	48	202	3	185	8	18	225	M16	184	168.3	12	8	4.5	170.5
200	320	20	22	20	44	55	258	3	240	8	18	280	M16	236	219.1	15	8	5.6	221.5
250	375	22	24	22	44	60	312	3	295	12	18	335	M16	290	273.0	15	10	6.3	276.5
300	440	22	24	22	44	62	365	4	355	12	22	395	M20	342	323.9	15	10	7.1	327.5
350	490	22	26	22	–	62	415	4	–	12	22	445	M20	385	355.6	15	10	7.1	359.5
400	540	22	28	22	–	65	465	4	–	16	22	495	M20	438	406.4	15	10	7.1	411.0
450	595	24	30	24	–	65	520	4	–	16	22	550	M20	492	457.0	15	12	7.1	462.0
500	645	24	30	24	–	68	570	4	–	20	22	600	M20	538	508.0	15	12	7.1	513.5
600	755	24	32	34	–	70	670	5	–	20	26	705	M24	640	610.0	16	12	7.1	616.5
700	860	24	40	38	–	70	775	5	–	24	26	810	M24	740	711.0	16	12	7.1	–
800	975	24	44	42	–	70	880	5	–	24	30	920	M27	842	813.0	16	12	7.1	–
900	1075	26	48	46	–	70	980	5	–	24	30	1020	M27	942	914.0	16	12	7.1	–
1000	1175	26	52	52	–	70	1080	5	–	28	30	1120	M27	1045	1016.0	16	12	7.1	–
1200	1405	28	60	60	–	90	1295	5	–	32	33	1340	M30	1248	1220.0	20	12	8.0	–
1400	1630	32	68	68	–	90	1510	5	–	36	36	1560	M33	1452	1420.0	20	12	8.0	–
1600	1830	34	76	76	–	90	1710	5	–	40	36	1760	M33	1655	1620.0	20	12	9.0	–
1800	2045	36	84	84	–	100	1920	5	–	44	39	1970	M36	1855	1820.0	20	15	10.0	–
2000	2265	38	92	92	–	110	2125	5	–	48	42	2180	M39	2058	2020.0	25	15	11.0	–

BS 4504 PN10 Flange Dimensions

Nom. Size	Flange						Raised Face		Boss	Drilling			Bolting	Neck					Bore Diameter
DN	A	C	C1	C2	D	D1	G	X	N	No.	I	J	Bolting	M	F	E	R	T	B
10	90	14	14	14	20	35	40	2	30	4	14	60	M12	28	17.2	6	3	1.8	18.0
15	95	14	14	14	20	35	45	2	35	4	14	65	M12	32	21.3	6	3	2.0	22.0
20	105	16	16	16	24	38	58	2	45	4	14	75	M12	39	26.9	6	4	2.3	27.5
25	115	16	16	16	24	38	68	2	52	4	14	85	M12	46	33.7	6	4	2.6	34.5
32	140	16	18	16	26	40	78	2	60	4	18	100	M16	56	42.4	6	5	2.6	43.5
40	150	16	18	16	26	42	88	3	70	4	18	110	M16	64	48.3	7	5	2.6	49.5
50	165	18	20	18	28	45	102	3	84	4	18	125	M16	74	60.3	8	5	2.9	61.5
65	185	18	20	18	32	45	122	3	104	4 / 8	18	145	M16	92	76.1	10	6	2.9	77.5
80	200	20	20	20	34	50	138	3	118	8	18	160	M16	110	88.9	10	6	3.2	90.5
100	220	20	22	20	40	52	162	3	140	8	18	180	M16	130	114.3	12	6	3.6	116.0
125 *	250	22	22	22	44	55	188	3	168	8	18	210	M16	158	139.7	12	6	4.0	141.5
150	285	22	24	22	44	55	212	3	195	8	22	240	M20	184	168.3	12	8	4.5	170.5
200	340	24	24	24	44	62	268	3	246	8	22	295	M20	234	219.1	16	8	5.6	221.5
250	395	26	26	26	46	68	320	3	298	12	22	350	M20	288	273.0	16	10	6.3	276.5
300	445	26	28	26	46	68	370	4	350	12	22	400	M20	342	323.9	16	10	7.1	327.6
350	505	26	28	26	53	68	430	4	400	16	22	460	M20	390	355.6	16	10	7.1	359.0
400	565	26	32	26	57	72	482	4	456	16	26	515	M24	440	406.4	16	10	7.1	411.0
450	615	28	36	28	63	72	532	4	502	20	26	565	M24	488	457.0	16	12	7.1	462.0
500	670	28	38	28	67	75	585	4	559	20	26	620	M24	540	508.0	16	12	7.1	513.5
600	780	28	42	34	75	80	685	5	658	20	30	725	M27	640	610.0	18	12	7.1	616.5
700	895	30	–	38	–	80	800	5	–	24	30	840	M27	746	711.0	18	12	8.0	–
800	1015	32	–	42	–	90	905	5	–	24	33	950	M30	848	813.0	18	12	8.0	–
900	1115	34	–	46	–	95	1005	5	–	28	33	1050	M30	948	914.0	20	12	10.0	–
1000	1230	34	–	52	–	95	1110	5	–	28	36	1160	M33	1050	1016.0	20	12	10.0	–
1200	1455	38	–	60	–	115	1330	5	–	32	39	1380	M36	1256	1220.0	25	12	11.0	–
1400	1675	42	–	–	–	120	1535	5	–	36	42	1590	M39	1460	1420.0	25	12	12.0	–
1600	1915	46	–	–	–	130	1760	5	–	40	48	1820	M45	1666	1620.0	25	12	14.0	–
1800	2115	50	–	–	–	140	1960	5	–	44	48	2020	M45	1866	1820.0	30	15	15.0	–
2000	2325	54	–	–	–	150	2170	5	–	48	48	2230	M45	2070	2020.0	30	15	16.0	–
2200	2550	58	–	–	–	160	2370	6	–	52	56	2440	M52	2275	2220.0	35	15	–	–
2400	2760	62	–	–	–	170	2570	6	–	56	56	2650	M52	2478	2420.0	35	15	–	–
2600	2960	65	–	–	–	180	2780	6	–	60	56	2850	M52	2680	2620.0	40	18	–	–
2800	3180	70	–	–	–	190	3000	6	–	64	56	3070	M52	2882	2820.0	40	18	–	–
3000	3405	75	–	–	–	200	3210	6	–	68	62	3290	M56	3085	3020.0	40	18	–	–

BS 4504 PN16 Flange Dimenisons

Nom. Size	Flange						Raised Face		Boss	Drilling			Bolting	Neck					Bore Diameter
DN	A	C	C1	C2	D	D1	G	X	N	No.	I	J		M	F	E	R	T	B
10	90	14	14	14	20	35	40	2	30	4	14	60	M12	28	17.2	6	3	1.8	18.0
15	95	14	14	14	20	35	45	2	35	4	14	65	M12	32	21.3	6	3	2.0	22.0
20	105	16	16	16	24	38	58	2	45	4	14	75	M12	39	26.9	6	4	2.3	27.5
25	115	16	16	16	24	38	68	2	52	4	14	85	M12	46	33.7	6	4	2.6	34.5
32	140	16	18	16	26	40	78	2	60	4	18	100	M16	56	42.4	6	5	2.6	43.5
40	150	16	18	16	26	42	88	3	70	4	18	110	M16	64	48.3	7	5	2.6	49.5
50	165	18	20	18	28	45	102	3	84	4	18	125	M16	74	60.3	8	5	2.9	61.5
65	185	18	20	18	32	45	122	3	104	4 / 8	18	145	M16	92	76.1	10	6	2.9	77.5
80	200	20	20	20	34	50	138	3	118	8	18	160	M16	110	88.9	10	6	3.2	90.5
100	220	20	22	20	40	52	162	3	140	8	18	180	M16	130	114.3	12	6	3.6	116.0
125 *	250	22	22	22	44	55	188	3	168	8	18	210	M16	158	139.7	12	6	4.0	141.5
150	285	22	24	22	44	55	212	3	195	8	22	240	M20	184	168.3	12	8	4.5	170.5
200	340	24	26	24	44	62	268	3	246	12	22	295	M20	234	219.1	16	8	5.6	221.5
250	405	26	29	26	46	70	320	3	298	12	26	355	M24	288	273.0	16	10	6.3	276.5
300	460	28	32	28	46	78	378	4	350	12	26	410	M24	342	323.9	16	10	7.1	327.6
350	520	30	35	30	57	82	438	4	400	16	26	470	M24	390	355.6	16	10	8.0	359.0
400	580	32	38	32	63	85	490	4	456	16	30	525	M27	444	406.4	16	10	8.0	411.0
450	640	34	42	36	63	87	550	4	502	20	30	585	M27	490	457.0	16	12	8.0	462.0
500	715	34	46	36	73	90	610	4	559	20	33	650	M30	546	508.0	16	12	8.0	513.5
600	840	36	52	44	83	95	725	5	658	20	36	770	M33	650	610.0	18	12	8.8	616.5
700	910	36	60	48	83	100	795	5	760	24	36	840	M33	750	711.0	18	12	8.6	–
800	1025	38	68	52	90	105	900	5	864	24	39	950	M36	848	813.0	20	12	10.0	–
900	1125	40	76	58	94	110	1000	5	968	28	39	1050	M36	948	914.0	20	12	10.0	–
1000	1255	42	84	64	100	120	1115	5	1072	28	42	1170	M39	1056	1016.0	22	12	10.0	–
1200	1485	48	98	76	–	130	1330	5	–	32	48	1390	M45	1260	1220.0	30	12	12.5	–
1400	1685	52	–	–	–	145	1530	5	–	36	48	1590	M45	1465	1420.0	30	12	14.2	–
1600	1930	58	–	–	–	160	1750	5	–	40	56	1820	M52	1668	1620.0	35	12	16.0	–
1800	2130	62	–	–	–	170	1950	5	–	44	56	2020	M52	1870	1820.0	35	15	17.5	–
2000	2435	66	–	–	–	190	2150	5	–	48	62	2230	M56	2072	2020.0	40	15	20.0	–

BS 4504 PN25 Flange Dimenisons

Nom. Size	Flange						Raised Face		Boss	Drilling			Bolting	Neck					Bore Diameter
DN	A	C	C1	C2	D	D1	G	X	N	No.	I	J	Bolting	M	F	E	R	T	B
10	90	16	14	16	22	35	40	2	30	4	14	60	M12	28	17.2	6	3	1.8	18.0
15	95	16	14	16	22	38	45	2	35	4	14	65	M12	32	21.3	6	3	2.0	22.0
20	105	18	16	18	26	40	58	2	45	4	14	75	M12	40	26.9	6	4	2.3	27.5
25	115	18	16	18	28	40	68	2	52	4	14	85	M12	46	33.7	6	4	2.6	34.5
32	140	18	18	18	30	42	78	2	60	4	18	100	M16	56	42.4	6	5	2.6	43.5
40	150	18	18	18	32	45	88	3	70	4	18	110	M16	64	48.3	7	5	2.6	49.5
50	165	20	20	20	34	48	102	3	84	4	18	125	M16	74	60.3	8	5	2.9	61.5
65	185	22	22	22	38	52	122	3	104	8	18	145	M16	92	76.1	10	6	2.9	77.5
80	200	24	24	24	40	58	138	3	118	8	18	160	M16	110	88.9	12	6	3.2	90.5
100	235	24	26	24	44	65	162	3	145	8	22	190	M20	134	114.3	12	6	3.6	116.0
125	270	26	28	26	48	68	188	3	170	8	26	220	M24	162	139.7	12	6	4.0	141.5
150	300	28	30	28	52	75	218	3	200	8	26	250	M24	190	168.3	12	8	4.5	170.5
200	360	30	32	30	52	80	278	3	256	12	26	310	M24	244	219.1	16	8	6.3	221.5
250	425	32	35	32	60	88	335	3	310	12	30	370	M27	296	273.0	18	10	7.1	276.5
300	485	34	38	34	67	92	395	4	364	16	30	430	M27	350	323.9	18	10	8.0	327.5
350	555	38	42	38	72	100	450	4	418	16	33	490	M30	398	355.6	20	10	8.0	359.5
400	620	40	46	40	78	110	505	4	472	16	36	550	M33	452	406.4	20	10	8.8	411.0
450	670	42	50	44	84	110	555	4	520	20	36	600	M33	500	457.0	20	12	8.8	462.0
500	730	44	56	45	90	125	615	4	580	20	36	660	M33	558	508.0	20	12	10.0	513.5
600	845	46	68	54	100	125	720	5	684	20	39	770	M36	660	610.0	20	12	11.0	616.5
700	960	46	–	–	–	125	820	5	–	24	42	875	M39	760	711.0	20	12	12.5	–
800	1085	50	–	–	–	135	930	5	–	24	48	990	M45	864	813.0	22	12	14.2	–
900	1185	54	–	–	–	145	1030	5	–	28	48	1090	M45	968	914.0	24	12	16.0	–
1000	1320	58	–	–	–	155	1140	5	–	28	56	1210	M52	1070	1016.0	24	12	17.5	–
1200	1530	–	–	–	–	–	1350	5	–	32	56	1420	M52	–	1220.0	–	12	12.5	–
1400	1755	–	–	–	–	–	1560	5	–	36	62	1640	M56	–	1420.0	–	12	14.2	–
1600	1975	–	–	–	–	–	1780	5	–	40	62	1860	M56	–	1620.0	–	12	16.0	–
1800	2185	–	–	–	–	–	1985	5	–	44	70	2070	M64	–	1820.0	–	15	17.5	–
2000	2425	–	–	–	–	–	2210	5	–	48	70	2300	M64	–	2020.0	–	15	20.0	–

BS 4504 PN40 Flange Dimenisons

Nom. Size	Flange						Raised Face		Boss	Drilling			Bolting	Neck					Bore Diameter
DN	A	C	C1	C2	D	D1	G	X	N	No.	I	J		M	F	E	R	T	B
10	90	16	14	16	22	35	40	2	30	4	14	60	M12	28	17.2	6	3	1.8	18.0
15	95	16	14	16	22	38	45	2	35	4	14	65	M12	32	21.3	6	3	2.0	22.0
20	105	18	16	18	26	40	58	2	45	4	14	75	M12	40	26.9	6	4	2.3	27.5
25	115	18	16	18	28	40	68	2	52	4	14	85	M12	46	33.7	6	4	2.6	34.5
32	140	18	18	18	30	42	78	2	60	4	18	100	M16	56	42.4	6	5	2.6	43.5
40	150	18	18	18	32	45	88	3	70	4	18	110	M16	64	48.3	7	5	2.6	49.5
50	165	20	20	20	34	48	102	3	84	4	18	125	M16	74	60.3	8	5	2.9	61.5
65	185	22	22	22	38	52	122	3	104	8	18	145	M16	92	76.1	10	6	2.9	77.5
80	200	24	24	24	40	58	138	3	118	8	18	160	M16	110	88.9	12	6	3.2	90.5
100	235	24	26	24	44	65	162	3	145	8	22	190	M20	134	114.3	12	6	3.6	116.0
125	270	26	28	26	48	68	188	3	170	8	26	220	M24	162	139.7	12	6	4.0	141.5
150	300	28	30	28	52	75	218	3	200	8	26	250	M24	190	168.3	12	8	4.5	170.5
200	375	34	36	36	52	88	285	3	260	12	30	320	M27	244	219.1	16	8	6.3	221.5
250	450	38	42	38	60	105	345	3	312	12	33	385	M30	306	273.0	18	10	7.1	276.5
300	515	42	48	42	67	115	410	4	380	16	33	450	M30	362	323.9	18	10	8.0	327.5
350	580	46	54	46	72	125	465	4	424	16	36	510	M33	408	355.6	20	10	8.8	359.5
400	660	50	60	50	78	135	535	4	478	16	39	585	M36	462	406.4	20	10	11.0	411.0
450	685	50	66	54	84	135	560	4	522	20	39	610	M36	500	457.0	20	12	12.5	462.0
500	755	52	72	56	90	140	615	4	576	20	42	670	M39	562	508.0	20	12	14.2	513.5
600	890	60	84	70	100	150	735	5	686	20	48	795	M45	666	610.0	20	12	16.0	616.5

ANSI B16.5 Class 150 BS 4504 Flange Pressure Ratings

				Temperature
FLANGE TABLE	-10°C to 200°C	250°C	300°C	350°C	400°C	425°C	450°C	475°C
6	6	5.5	5	–	–	–	–	–
10	10	9	8	7	6	–	–	–
16	16	15	13	11	9	–	–	–
25	25	24	21	17	14	12	9	6
40	40	38	33	28	23	20	15	10
64	64	61	53	44	36	32	24	16
100	100	95	83	70	57	50	37	25
160	160	152	132	112	92	80	60	40

Dimensions of BS 10 Flange

The dimensions of BS 10 flanges are specified in the British Standard BS 10: 1962, which includes tables of flange dimensions for various pressure ratings, sizes, and bolt circle diameters.

BS 10 Table D Flange Dimensions

BS 10 Table D flanges: These are flat-faced flanges that are typically used with pipes that have a small diameter, such as those used in low-pressure piping systems.

N.B. SIZE		D	K	L	A	C	N1	N2	B	H1	H2	R1	R2	HOLES
IN	mm
½”	15	95.3	66.8	14.5	21.3	4.8	27.0	33.3	22.4	9.5	22.2	6.4	1.6	4
¾”	20	101.6	73.2	14.5	26.7	4.8	33.3	38.1	27.7	11.1	22.2	6.4	1.6	4
1″	25	114.3	82.6	14.5	33.5	4.8	42.9	47.6	34.6	11.1	22.2	6.4	1.6	4
1 ¼”	32	120.7	87.4	14.5	42.2	6.4	49.2	55.6	43.2	11.1	25.4	6.4	1.6	4
1 ½”	40	133.4	98.6	14.5	48.3	6.4	58.7	61.9	49.5	12.7	28.6	6.4	1.6	4
2″	50	152.4	114.3	17.5	60.5	7.9	69.9	74.6	62.0	12.7	28.6	6.4	1.6	4
2 ½”	65	165.1	127.0	17.5	73.2	7.9	82.6	90.5	74.7	15.9	31.8	6.4	1.6	4
3″	80	184.2	146.1	17.5	88.9	9.7	101.6	106.4	90.7	15.9	34.9	6.4	1.6	4
3 ½”	88	203.2	165.1	17.5	101.6	9.7	114.3	119.1	103.4	17.5	34.9	6.4	1.6	4
4″	100	215.9	177.8	17.5	114.3	9.7	130.2	133.4	116.1	19.1	41.3	9.5	3.2	4
5″	125	254.0	209.6	17.5	141.2	12.7	152.4	160.3	143.8	19.1	44.5	9.5	3.2	8
6″	150	279.4	235.0	17.5	168.4	12.7	184.2	185.7	171.7	19.1	47.6	9.5	3.2	8
8″	200	336.6	292.1	17.5	219.2	12.7	241.3	241.3	221.5	22.2	50.8	9.5	3.2	8
10″	250	406.4	355.6	22.2	273.1	16.0	292.1	298.5	276.4	27.0	63.5	9.5	3.2	8
12″	300	457.2	406.4	22.2	323.9	19.1	342.9	349.3	325.9	28.6	69.9	9.5	4.8	12
14″	350	527.1	469.9	25.4	355.6	22.2	406.4	–	359.2	–	73.0	9.5	4.8	12
16″	400	577.9	520.7	25.4	406.4	22.2	–	–	410.5	–	–	–	–	12
18″	450	641.4	584.2	25.4	457.2	25.4	–	–	461.8	–	–	–	–	12
20″	500	704.9	641.4	25.4	508.0	28.6	–	–	513.1	–	–	–	–	16
24″	600	825.5	755.7	28.7	609.6	31.8	–	–	616.0	–	–	–	–	16

BS 10 Table E Flange Dimensions

BS 10 Table E flanges: These are also flat-faced flanges, but they are larger than Table D flanges and are typically used with pipes that have a larger diameter, such as those used in medium-pressure piping systems.

N.B. SIZE		D	K	L	A	C	N1	N2	B	H1	H2	R1	R2	HOLES
IN	mm
½”	15	95.3	66.8	14.5	21.3	6.4	27.0	33.3	22.4	9.5	22.2	6.4	1.6	4
¾”	20	101.6	73.2	14.5	26.7	6.4	33.3	38.1	27.7	11.1	22.2	6.4	1.6	4
1″	25	114.3	82.6	14.5	33.5	7.2	42.9	47.6	34.6	11.1	22.2	6.4	1.6	4
1 ¼”	32	120.7	87.4	14.5	42.2	7.9	49.2	55.6	43.2	11.1	25.4	6.4	1.6	4
1 ½”	40	133.4	98.6	14.5	48.3	8.7	58.7	61.9	49.5	12.7	28.6	6.4	1.6	4
2″	50	152.4	114.3	17.5	60.5	9.5	69.9	74.6	62.0	12.7	28.6	6.4	1.6	4
2 ½”	65	165.1	127.0	17.5	73.2	10.3	82.6	90.5	74.7	15.9	31.8	6.4	1.6	4
3″	80	184.2	146.1	17.5	88.9	11.1	101.6	106.4	90.7	15.9	34.9	6.4	1.6	4
3 ½”	88	203.2	165.1	17.5	101.6	11.9	114.3	119.1	103.4	17.5	34.9	6.4	1.6	4
4″	100	215.9	177.8	17.5	114.3	12.7	130.2	133.4	116.1	19.1	41.3	9.5	3.2	4
5″	125	254.0	209.6	17.5	141.2	14.3	152.4	160.3	143.8	19.1	44.5	9.5	3.2	8
6″	150	279.4	235.0	17.5	168.4	17.5	184.2	185.7	171.7	19.1	47.6	9.5	3.2	8
8″	200	336.6	292.1	17.5	219.2	19.1	241.3	241.3	221.5	22.2	50.8	9.5	3.2	8
10″	250	406.4	355.6	22.2	273.1	22.2	292.1	298.5	276.4	27.0	63.5	9.5	3.2	8
12″	300	457.2	406.4	22.2	323.9	25.4	342.9	349.3	325.9	28.6	69.9	9.5	4.8	12
14″	350	527.1	469.9	25.4	355.6	28.6	406.4	–	359.2	–	73.0	9.5	4.8	12
16″	400	577.9	520.7	25.4	406.4	31.8	431.8	–	410.5	–	–	–	–	12
18″	450	641.4	584.2	25.4	457.2	34.9	–	–	461.8	–	–	–	–	12
20″	500	704.9	641.4	25.4	508.0	38.1	–	–	513.1	–	–	–	–	16
24″	600	825.5	755.7	28.7	609.6	47.6	–	–	616.0	–	–	–	–	16

BS 10 Table F Flange Dimensions

BS 10 Table F flanges: These are flanges with a raised face, which helps to prevent leaks by providing a barrier between the flange and the pipe. They are typically used in high-pressure piping systems.

N.B. SIZE		D	K	L	A	C	N1	N2	B	H1	H2	R1	R2	HOLES
IN	mm
½”	15	95.3	66.8	14.5	21.3	6.4	27.0	33.3	22.4	9.5	22.2	6.4	1.6	4
¾”	20	101.6	73.2	14.5	26.7	6.4	33.3	38.1	27.7	11.1	22.2	6.4	1.6	4
1″	25	114.3	82.6	14.5	33.5	7.2	42.9	47.6	34.6	11.1	22.2	6.4	1.6	4
1 ¼”	32	120.7	87.4	14.5	42.2	7.9	49.2	55.6	43.2	11.1	25.4	6.4	1.6	4
1 ½”	40	133.4	98.6	14.5	48.3	8.7	58.7	61.9	49.5	12.7	28.6	6.4	1.6	4
2″	50	152.4	114.3	17.5	60.5	9.5	69.9	74.6	62.0	12.7	28.6	6.4	1.6	4
2 ½”	65	165.1	127.0	17.5	73.2	10.3	82.6	90.5	74.7	15.9	31.8	6.4	1.6	4
3″	80	184.2	146.1	17.5	88.9	11.1	101.6	106.4	90.7	15.9	34.9	6.4	1.6	4
3 ½”	88	203.2	165.1	17.5	101.6	11.9	114.3	119.1	103.4	17.5	34.9	6.4	1.6	4
4″	100	215.9	177.8	17.5	114.3	12.7	130.2	133.4	116.1	19.1	41.3	9.5	3.2	4
5″	125	254.0	209.6	17.5	141.2	14.3	152.4	160.3	143.8	19.1	44.5	9.5	3.2	8
6″	150	279.4	235.0	17.5	168.4	17.5	184.2	185.7	171.7	19.1	47.6	9.5	3.2	8
8″	200	336.6	292.1	17.5	219.2	19.1	241.3	241.3	221.5	22.2	50.8	9.5	3.2	8
10″	250	406.4	355.6	22.2	273.1	22.2	292.1	298.5	276.4	27.0	63.5	9.5	3.2	8
12″	300	457.2	406.4	22.2	323.9	25.4	342.9	349.3	325.9	28.6	69.9	9.5	4.8	12
14″	350	527.1	469.9	25.4	355.6	28.6	406.4	–	359.2	–	73.0	9.5	4.8	12
16″	400	577.9	520.7	25.4	406.4	31.8	431.8	–	410.5	–	–	–	–	12
18″	450	641.4	584.2	25.4	457.2	34.9	–	–	461.8	–	–	–	–	12
20″	500	704.9	641.4	25.4	508.0	38.1	–	–	513.1	–	–	–	–	16
24″	600	825.5	755.7	28.7	609.6	47.6	–	–	616.0	–	–	–	–	16

BS 10 Table H Flange Dimenisons

BS 10 Table H flanges: These are flanges with a raised face and a hub, which helps to distribute the load evenly across the flange and the pipe. They are typically used in very high-pressure piping systems.

Nominal	Dia. of Flange	I.D. of Flange	Dia. of Bolt Circle	No. of	Dia. of Bolt	Thickness
Pipe Size	D	d5	k	Holes	d2	b
1/2″	3.3/4″	7/8″	2.5/8″	4	1/2″	3/8″
3/4″	4″	1.3/32″	2.7/8″	4	1/2″	3/8″
1″	4.3/4″	1.23/64″	3.7/16″	4	5/8″	3/8″
1.1/4″	5.1/4″	1.45/64″	3.7/8″	4	5/8″	1/2″
1.1/2″	5.1/2″	1.15/16″	4.1/8″	4	5/8″	1/2″
2″	6.1/2″	2.7/16″	5″	4	5/8″	5/8″
2.1/2	7.1/4″	2.15/16″	5.3/4″	8	5/8″	5/8″
3″	8″	3.37/64″	6.1/2″	8	5/8″	5/8″
3.1/2″	8.1/2″	4.5/64″	7″	8	5/8″	3/4″
4″	9″	4.37/64″	7.1/2″	8	5/8″	3/4″
5″	11″	5.43/64″	9.1/4″	8	3/4″	7/8″
6″	12″	6.23/32″	10.1/4″	12	3/4″	7/8″
7″	13.1/4″	7.5/8″	11.1/2″	12	3/4″	7/8″
8′	14.1/2″	8.23/32″	12.3/4″	12	3/4″	1″
9″	16″	9.23/32″	14″	12	7/8″	1″
10″	17″	10.7/8″	15″	12	7/8″	1″
12″	19.1/4″	12.7/8″	17.1/4″	16	7/8″	1/1/8″
14″	21.3/4″	14.9/64″	19.1/2″	16	1″	1.1/4″
16″	24″	16.5/32″	21.3/4″	20	1″	1.1/4″
18″	26.1/2″	18.3/16″	24″	20	1.1/8″	1.3/8″
20″	29″	20.13/16″	26.1/2″	24	1.1/8″	1.1/2″
24″	33.1/2″	24.1/4″	30.3/4″	24	1.1/4″	1.5/8″

BS 10 Table J Flange Dimenisons

BS 10 Table J flanges: These are flanges with a male face and a female hub, which allows them to be joined together easily without the need for bolts or other fasteners. They are typically used in low-pressure piping systems.

Maximum Pipe Sizes		L	D	A	K	C	N2	N1	B	H2	R1	H1	R2	HOLES
Inch	Millimeter (MM)
½”	15	14.5	95.3	21.3	66.8	6.4	33.3	27	22.4	22.2	6.4	9.5	1.6	4
¾”	20	14.5	101.6	26.7	73.2	6.4	38.1	33.3	27.7	22.2	6.4	11.1	1.6	4
1″	25	14.5	114.3	33.5	82.6	7.2	47.6	42.9	34.6	22.2	6.4	11.1	1.6	4
1 ¼”	32	14.5	120.7	42.2	87.4	7.9	55.6	49.2	43.2	25.4	6.4	11.1	1.6	4
1 ½”	40	14.5	133.4	48.3	98.6	8.7	61.9	58.7	49.5	28.6	6.4	12.7	1.6	4
2″	50	17.5	152.4	60.5	114.3	9.5	74.6	69.9	62	28.6	6.4	12.7	1.6	4
2 ½”	65	17.5	165.1	73.2	127	10.3	90.5	82.6	74.7	31.8	6.4	15.9	1.6	4
3″	80	17.5	184.2	88.9	146.1	11.1	106.4	101.6	90.7	34.9	6.4	15.9	1.6	4
3 ½”	88	17.5	203.2	101.6	165.1	11.9	119.1	114.3	103.4	34.9	6.4	17.5	1.6	4
4″	100	17.5	215.9	114.3	177.8	12.7	133.4	130.2	116.1	41.3	9.5	19.1	3.2	4
5″	125	17.5	254	141.2	209.6	14.3	160.3	152.4	143.8	44.5	9.5	19.1	3.2	8
6″	150	17.5	279.4	168.4	235	17.5	185.7	184.2	171.7	47.6	9.5	19.1	3.2	8
8″	200	17.5	336.6	219.2	292.1	19.1	241.3	241.3	221.5	50.8	9.5	22.2	3.2	8
10″	250	22.2	406.4	273.1	355.6	22.2	298.5	292.1	276.4	63.5	9.5	27	3.2	8
12″	300	22.2	457.2	323.9	406.4	25.4	349.3	342.9	325.9	69.9	9.5	28.6	4.8	12
14″	350	25.4	527.1	355.6	469.9	28.6	–	406.4	359.2	73	9.5	–	4.8	12
16″	400	25.4	577.9	406.4	520.7	31.8	–	431.8	410.5	–	–	–	–	12
18″	450	25.4	641.4	457.2	584.2	34.9	–	–	461.8	–	–	–	–	12
20″	500	25.4	704.9	508	641.4	38.1	–	–	513.1	–	–	–	–	16
24″	600	28.7	825.5	609.6	755.7	47.6	–	–	616	–	–	–	–	16

BS 10 Flanges Sizes Chart

NOMINAL BORE 15	FLANGE DIAMETER in mm	PCD	BOLTS	BOLTSIZE	HOLE SIZE	THICKNESS
Table D	3 3/4 / 95	2 5/8 / 67	4	1/2	9/16 / 14	3/8 / 10
Table E	3 3/4 / 95	2 5/8 / 67	4	1/2	9/16 / 14	3/8 / 10
Table F	3 3/4 / 95	2 5/8 / 67	4	1/2	9/16 / 14	3/8 / 10
Table H	4 1/2 / 114	3 1/4 / 83	4	5/8	11/16 / 17	1/2 / 13
Table J	4 1/2 / 114	3 1/4 / 83	4	5/8	11/16 / 17	5/8 / 16
Table K	4 1/2 / 114	3 1/4 / 83	4	5/8	11/16 / 17	3/4 / 19
NOMINAL BORE 20	FLANGE DIAMETER in mm	PCD	BOLTS	BOLTSIZE	HOLE SIZE	THICKNESS
Table D	4 / 102	2 7/8 / 73	4	1/2	9/16 / 14	3/8 / 10
Table E	4 / 102	2 7/8 / 73	4	1/2	9/16 / 14	3/8 / 10
Table F	4 / 102	2 7/8 / 73	4	1/2	9/16 / 14	3/8 / 10
Table H	4 1/2 / 114	3 1/4 / 83	4	5/8	11/16 / 17	1/2 / 13
Table J	4 1/2 / 114	3 1/4 / 83	4	5/8	11/16 / 17	5/8 / 16
Table K	4 1/2 / 114	3 1/4 / 83	4	5/8	11/16 / 17	3/4 / 19
NOMINAL BORE 25	FLANGE DIAMETER	PCD	BOLTS	BOLTSIZE	HOLE SIZE	THICKNESS
Table D	4 1/2 / 114	3 1/4 / 83	4	1/2	9/16 / 14	3/8 / 10
Table E	4 1/2 / 114	3 1/4 / 83	4	1/2	9/16 / 14	3/8 / 10
Table F	4 3/4 / 121	3 7/16 / 87	4	5/8	9/16 / 14	3/8 / 10
Table H	4 3/4 / 121	3 7/16 / 87	4	5/8	11/16 / 17	9/16 / 14
Table J	4 3/4 / 121	3 7/16 / 87	4	5/8	11/16 / 17	3/4 / 19
Table K	5 / 127	3 3/4 / 95	4	5/8	11/16 / 17	7/8 / 22
NOMINAL BORE 32	FLANGE DIAMETER	PCD	BOLTS	BOLTSIZE	HOLE SIZE	THICKNESS
Table D	4 3/4 / 121	3 7/16 / 87	4	1/2	9/16 / 14	1/2 / 13
Table E	4 3/4 / 121	3 7/16 / 87	4	1/2	9/16 / 14	1/2 / 13
Table F	5 1/4 / 133	3 7/8 / 98	4	5/8	11/16 / 17	1/2 / 13
Table H	5 1/4 / 133	3 7/8 / 98	4	5/8	11/16 / 17	11/16 / 17
Table J	5 1/4 / 133	3 7/8 / 98	4	5/8	11/16 / 17	3/4 / 19
Table K	5 1/4 / 133	3 7/8 / 98	4	5/8	11/16 / 17	7/8 / 22
NOMINAL BORE 40	FLANGE DIAMETER	PCD	BOLTS	BOLTSIZE	HOLE SIZE	THICKNESS
Table D	5 1/4 / 133	3 7/8 / 98	4	1/2	9/16 / 14	1/2 / 13
Table E	5 1/4 / 133	3 7/8 / 98	4	1/2	9/16 / 14	1/2 / 13
Table F	5 1/2 / 140	4 1/8 / 105	4	5/8	11/16 / 17	1/2 / 13
Table H	5 1/2 / 140	4 1/8 / 105	4	5/8	11/16 / 17	11/16 / 17
Table J	5 1/2 / 140	4 1/8 / 105	4	5/8	11/16 / 17	7/8 / 22
Table K	6 / 152	4 1/2 / 114	4	3/4	7/8 / 22	1 / 25
NOMINAL BORE 50	FLANGE DIAMETER	PCD	BOLTS	BOLTSIZE	HOLE SIZE	THICKNESS
Table D	6 / 152	4 1/2 / 114	4	5/8	11/16 / 17	9/16 / 14
Table E	6 / 152	4 1/2 / 114	4	5/8	11/16 / 17	9/16 / 14
Table F	6 1/2 / 165	5 / 127	4	5/8	11/16 / 17	5/8 / 16
Table H	6 1/2 / 165	5 / 127	4	5/8	11/16 / 17	3/4 / 19
Table J	6 1/2 / 165	5 / 127	4	3/4	7/8 / 22	1 / 25
Table K	6 1/2 / 165	5 / 127	8	5/8	11/16 / 17	1 / 25
NOMINAL BORE 65	FLANGE DIAMETER	PCD	BOLTS	BOLTSIZE	HOLE SIZE	THICKNESS
Table D	6 1/2 / 165	5 / 127	4	5/8	11/16 / 17	9/16 / 14
Table E	6 1/2 / 165	5 / 127	4	5/8	11/16 / 17	9/16 / 14
Table F	7 1/4 / 184	5 3/4 / 146	8	5/8	11/16 / 17	5/8 / 16
Table H	7 1/4 / 184	5 3/4 / 146	8	5/8	11/16 / 17	3/4 / 19
Table J	7 1/4 / 184	5 3/4 / 146	8	3/4	7/8 / 22	1 / 25
Table K	7 1/4 / 184	5 3/4 / 146	8	3/4	7/8 / 22	1 1/8 / 29
NOMINAL BORE 80	FLANGE DIAMETER	PCD	BOLTS	BOLTSIZE	HOLE SIZE	THICKNESS
Table D	8 1/2 / 216	7 / 178	4	5/8	11/16 / 17	11/16 / 17
Table E	8 1/2 / 216	7 / 178	8	5/8	11/16 / 17	11/16 / 17
Table F	9 / 229	7 1/2 / 191	8	5/8	11/16 / 17	3/4 / 19
Table H	9 / 229	7 1/2 / 191	8	5/8	11/16 / 17	1 / 25
Table J	9 / 229	7 1/2 / 191	8	3/4	7/8 / 22	1 3/8 / 35
Table K	9 1/2 / 241	7 3/4 / 197	8	7/8	1 / 25	1 3/8 / 35
NOMINAL BORE 100	FLANGE DIAMETER	PCD	BOLTS	BOLTSIZE	HOLE SIZE	THICKNESS
Table D	8 1/2 / 216	7 / 178	4	5/8	11/16 / 17	11/16 / 17
Table E	8 1/2 / 216	7 / 178	8	5/8	11/16 / 17	11/16 / 17
Table F	9 / 229	7 1/2 / 191	8	5/8	11/16 / 17	3/4 / 19
Table H	9 / 229	7 1/2 / 191	8	5/8	11/16 / 17	1 / 25
Table J	9 / 229	7 1/2 / 191	8	3/4	7/8 / 22	1 3/8 / 35
Table K	9 1/2 / 241	7 3/4 / 197	8	7/8	1 / 25	1 3/8 / 35

BS 10 Pipe Flanges Weight Chart

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS4087 Flanges	PN14 Flanges	95	67	4	M12	14
AS 2129 Flange	Table C Flanges	95	67	4	13	14
	Table D Flanges	95	67	4	13	14
	Table E Flanges	95	67	4	13	14
	Table F Flanges	95	67	4	13	14
	Table H Flanges	114	83	4	16	17
	Table J Flanges	114	83	4	16	17
ANSI B16.5 Flanges	ANSI 150 Flanges	89	60	4	13	16
	ANSI 300 Flanges	95	67	4	13	16
	ANSI 600 Flanges	95	67	4	13	16
	ANSI 900 Flanges	121	83	4	19	22
	ANSI 1500 Flanges	121	83	4	19	22
ISO 7005 (DIN) Flange	PN6 Flanges	80	55	4	M10	11
	PN10 Flanges	95	65	4	M12	14
	PN16 Flanges	95	65	4	M12	14
	PN20 Flanges	90	60.5	4	M14	16
	PN25 Flanges	95	65	4	M12	14
	PN40 Flanges	95	65	4	M12	14

Stainless Steel BS 10 Flanges Pressure Ratings

FLANGE TABLE	Temperature							Max Hydraulic
	0°F to 450°F	500°F	600°F	700°F	800°F	850°F	900°F
	0°F to 450°F	500°F	600°F	700°F	800°F	850°F	900°F
	-18°C to 230°C	260°C	315°C	370°C	425°C	450°C	480°C	Test Pressure
D	100	95	80	65	50	–	–	150
E	200	185	155	130	100	–	–	300
F	300	280	235	195	150	–	–	450
H	500	465	395	320	250	180	115	750
J	700	650	550	450	350	255	160	1050
K	900	835	705	580	450	325	205	1350
R	1200	1115	945	770	600	435	275	1800
S	1800	1670	1415	1155	900	655	415	2700
T	2800	2600	2200	1800	1400	1025	645	4200

Dimensions of BS 3293 Weld Neck & Slip-On Flanges

BS 3293:1960 is a dimensional British Standard only, applicable to forged carbon steel slip-on flanges and welded neck flanges of 26″ nominal size and above in the petroleum industry. Drilled, bolted, finished and thickness dimensions also apply to integral end flanges for valves and fittings. Four classes of flanges are provided, namely Classes 150, 300, 400 and 600. BS 3293:1960 does not include pressure/temperature ratings; flange names quoted are for identification purposes only.

Dimensions of BS 3293 Class 150 Weld Neck & Slip-On Flanges

NPS	O	B1	C	Y2	Y1	A
26	869.9	666.7	50.8	127.0	85.7	660.4
28	927.1	717.6	52.4	128.6	87.3	711.2
30	984.2	768.3	54.0	130.2	88.9	762.0
32	1060.4	819.1	57.1	133.3	92.1	812.8
34	1111.2	869.9	58.7	134.9	93.7	863.6
36	1168.4	920.7	60.3	136.5	95.2	914.4
38	1238.2	971.5	60.3	136.5	95.2	965.2
40	1289.0	1022.3	63.5	139.7	98.4	1016.0
42	1346.2	1073.2	66.7	142.9	101.6	1066.8
44	1403.3	1123.9	66.7	142.9	101.6	1117.6
46	1454.2	1174.7	68.3	144.5	103.2	1168.4
48	1511.1	1225.5	69.9	146.1	104.8	1219.2

NPS	X	R	NBH	DBH	D	r
26	723.9	742.9	24	34.9	806.4	6.35
28	781.0	793.7	28	34.9	863.6	6.35
30	831.8	857.2	28	34.9	914.4	6.35
32	889.0	908.0	28	41.3	977.9	7.94
34	939.8	958.8	32	41.3	1028.7	7.94
36	996.9	1022.3	32	41.3	1085.8	7.94
38	1060.4	1073.1	32	41.3	1149.3	9.53
40	1111.2	1123.9	36	41.3	1200.1	9.53
42	1168.4	1193.8	36	41.3	1257.3	9.53
44	1219.2	1244.6	40	41.3	1314.4	11.11
46	1270.0	1295.4	40	41.3	1365.2	11.11
48	1327.2	1358.9	44	41.3	1422.4	11.11

General note..

All dimensions above are in millimeters unless otherwise indicated.

Indications..

NPS = Nominal Pipe Size
O = Outside Diameter of Flange
B1 = Flange Bore Slip-On
C = Thickness of Flange Min
Y2 = Weld Neck Overall Length
Y1 = Slip-On Overall Length
A = Weld Neck Diameter at Weld Bevel
X = Weld Neck / Slip-On Hub Diameter
R = Raised Face (O.D.) Outside Diameter
NBH = Number of Bolt Holes
DBH = Diameter of Bolt Holes
r = Fillet Radius
D = Diameter of Bolt Circle
B2 = To be specified by purchaser
Rf = Class 150-300 Rf height 1.6mm Class 400-600 Rf height 6.35mm

Weights of Class 150 Weld Neck & Slip-On flanges

NPS	Weld Neck kg	Slip-On kg
26	118	107
28	134	122
30	153	138
32	190	170
34	212	184
36	242	211
38	284	249
40	311	272
42	358	313
44	376	331
46	399	349
48	440	381

Note..

Weights are based on manufacturer’s data and are approximate

Dimensions of BS 3293 Class 300 Weld Neck & Slip-On Flanges

NPS	O	B1	C	Y2/Y1	A	X1
26	971.5	666.7	79.4	184.1	666.7	687.4
28	1035.0	717.6	85.7	196.8	717.5	739.7
30	1092.2	768.3	92.1	209.5	768.3	792.2
32	1149.3	819.1	98.4	222.2	819.1	844.6
34	1206.5	869.9	101.6	231.8	871.5	896.9
36	1270.0	920.7	104.8	241.3	922.3	949.3

NPS	X	R	NBH	DBH	D	r
26	720.7	749.3	28	44.4	876.3	9.53
28	774.7	800.1	28	44.4	939.8	11.11
30	827.2	857.2	28	47.6	996.9	11.11
32	881.1	914.4	28	50.8	1054.1	11.11
34	936.6	965.2	28	50.8	1104.9	12.7
36	990.6	1022.3	32	54.0	1168.4	12.7

Indications..

NPS = Nominal Pipe Size
O = Outside Diameter of Flange
B1 = Flange Bore Slip-On
C = Thickness of Flange Min
Y2/Y1 = Weld Neck / Slip-On Overall Length
A = Weld Neck Diameter at Weld Bevel
X1 = Slip on Hub Diamameter at Small End
X = Weld Neck / Slip-On Hub Diameter
R = Raised Face (O.D.) Outside Diameter
NBH = Number of Bolt Holes
DBH = Diameter of Bolt Holes
r = Fillet Radius
D = Diameter of Bolt Circle
B2 = To be specified by purchaser
Rf = Class 150-300 Rf height 1.6mm Class 400-600 Rf height 6.35mm

Weights of Class 300 Weld Neck & Slip-On flanges

NPS	Weld Neck kg	Slip-On kg
26	279	251
28	340	313
30	390	354
32	435	395
34	504	460
36	560	513

Note..

Weights are based on manufacturer’s data and are approximate

Ring Joint Facings BS 3293

NPS	Ring No.	Raised Face O.D.	Groove			Weights in Kg Weld Neck Slip-On
NPS	Ring No.	R	K	L	M	Cl 300	Cl 400	Cl 600
26	R93	809.6	749.3	12.7	19.8	298 270	349 304	446 417
28	R94	860.4	800.1	12.7	19.8	360 333	409 364	518 482
30	R95	917.6	857.2	12.7	19.8	412 376	465 419	570 537
32	R96	984.2	914.4	14.3	23.0	465 425	539 482	697 622
34	R97	1035.0	965.2	14.3	23.0	536 492	608 540	735 670
36	R98	1092.2	1022.3	14.3	23.0	595 548	689 621	800 764

Indications..

NPS = Nominal Pipe Size
R = Raised Face (O.D.) Outside Diameter
K = Pitch Diameter
L = Groove Depth
M = Groove Width
r = Corner radius at bottom of groove 1.6 mm max

Dimensions and Tolerances BS 3293

TYPE OF FLANGES	INDICATIONS	TOL
Weld Neck and Slip-On flanges	Raised face diameter	±0.40
	Flange thickness	+4.76 -0
	Overall length	±3.18
	Outside diameter at welding end of weld neck hub	+3.97 -0.79
	Inside diameter of weld neck flange	+3.18 -1.59
	Inside diameter of slip on flange	+1.59 -0
Ring Joint Facing on Weld Neck and Slip-On flanges	Depth of groove	+0.40 -0
	Width of groove	±0.20
	Pitch diameter of groove	±0.13

General note..

All dimensions above are in millimeters unless otherwise indicated.

Dimensions of BS 3293 Class 400 Weld Neck & Slip-On Flanges

NPS	O	B1	C	Y2/Y1	A	X1
26	971.5	666.7	88.9	193.7	668.3	693.7
28	1035.0	717.6	95.2	206.4	719.1	746.1
30	1092.2	768.3	101.6	219.1	769.6	800.1
32	1149.3	819.1	107.9	231.8	822.3	852.5
34	1206.5	869.9	111.1	241.3	873.1	904.9
36	1270.0	920.7	114.3	250.8	925.5	958.8

NPS	X	R	NBH	DBH	D	r
26	727.1	749.3	28	47.6	876.3	11.11
28	782.6	800.1	28	50.8	939.8	12.7
30	836.6	857.2	28	54.0	996.9	12.7
32	889.0	914.4	28	54.0	1054.1	12.7
34	944.6	965.2	28	54.0	1104.9	14.29
36	1012.9	1022.3	32	54.0	1168.4	14.29

Indications..

NPS = Nominal Pipe Size
O = Outside Diameter of Flange
B1 = Flange Bore Slip-On
C = Thickness of Flange Min
Y2/Y1 = Weld Neck / Slip-On Overall Length
A = Weld Neck Diameter at Weld Bevel
X1 = Slip on Hub Diamameter at Small End
X = Weld Neck / Slip-On Hub Diameter
R = Raised Face (O.D.) Outside Diameter
NBH = Number of Bolt Holes
DBH = Diameter of Bolt Holes
r = Fillet Radius
D = Diameter of Bolt Circle
B2 = To be specified by purchaser
Rf = Class 150-300 Rf height 1.6mm Class 400-600 Rf height 6.35mm

Weights of Class 400 Weld Neck & Slip-On flanges

NPS	Weld Neck kg	Slip-On kg
26	340	295
28	399	354
30	454	408
32	522	465
34	590	522
36	669	601

Note..

Weights are based on manufacturer’s data and are approximate

Ring Joint Facings BS 3293

NPS	Ring No.	Raised Face O.D.	Groove			Weights in Kg Weld Neck Slip-On
NPS	Ring No.	R	K	L	M	Cl 300	Cl 400	Cl 600
26	R93	809.6	749.3	12.7	19.8	298 270	349 304	446 417
28	R94	860.4	800.1	12.7	19.8	360 333	409 364	518 482
30	R95	917.6	857.2	12.7	19.8	412 376	465 419	570 537
32	R96	984.2	914.4	14.3	23.0	465 425	539 482	697 622
34	R97	1035.0	965.2	14.3	23.0	536 492	608 540	735 670
36	R98	1092.2	1022.3	14.3	23.0	595 548	689 621	800 764

Indications..

NPS = Nominal Pipe Size
R = Raised Face (O.D.) Outside Diameter
K = Pitch Diameter
L = Groove Depth
M = Groove Width
r = Corner radius at bottom of groove 1.6 mm max

Dimensions and Tolerances BS 3293

TYPE OF FLANGES	INDICATIONS	TOL
Weld Neck and Slip-On flanges	Raised face diameter	±0.40
	Flange thickness	+4.76 -0
	Overall length	±3.18
	Outside diameter at welding end of weld neck hub	+3.97 -0.79
	Inside diameter of weld neck flange	+3.18 -1.59
	Inside diameter of slip on flange	+1.59 -0
Ring Joint Facing on Weld Neck and Slip-On flanges	Depth of groove	+0.40 -0
	Width of groove	±0.20
	Pitch diameter of groove	±0.13

General note..

All dimensions above are in millimeters unless otherwise indicated.

Dimensions of BS 3293 Class 600 Weld Neck & Slip-On Flanges

NPS	O	B1	C	Y2/Y1	A	X1
26	1016.0	666.7	107.9	222.2	671.52	706.4
28	1073.1	717.6	111.1	234.9	723.9	760.4
30	1130.3	768.3	114.3	247.6	774.7	814.4
32	1193.8	819.1	117.5	260.3	825.5	868.4
34	1244.6	869.9	120.6	269.9	877.9	922.3
36	1314.4	920.7	123.8	282.6	928.7	976.3

NPS	X	R	NBH	DBH	D	r
26	747.7	749.3	28	50.8	914.4	14.29
28	803.3	800.1	28	54.0	965.2	15.88
30	862.0	857.2	28	54.0	1022.3	17.46
32	917.6	914.4	28	60.3	1079.5	17.46
34	973.1	965.2	28	60.3	1130.3	19.05
36	1031.9	1022.3	28	66.7	1193.8	19.05

Indications..

NPS = Nominal Pipe Size
O = Outside Diameter of Flange
B1 = Flange Bore Slip-On
C = Thickness of Flange Min
Y2/Y1 = Weld Neck / Slip-On Overall Length
A = Weld Neck Diameter at Weld Bevel
X1 = Slip on Hub Diamameter at Small End
X = Weld Neck / Slip-On Hub Diameter
R = Raised Face (O.D.) Outside Diameter
NBH = Number of Bolt Holes
DBH = Diameter of Bolt Holes
r = Fillet Radius
D = Diameter of Bolt Circle
B2 = To be specified by purchaser
Rf = Class 150-300 Rf height 1.6mm Class 400-600 Rf height 6.35mm

Weights of Class 600 Weld Neck & Slip-On flanges

NPS	Weld Neck kg	Slip-On kg
26	437	408
28	508	472
30	559	526
32	680	605
34	717	652
36	780	744

Note..

Weights are based on manufacturer’s data and are approximate

Ring Joint Facings BS 3293

NPS	Ring No.	Raised Face O.D.	Groove			Weights in Kg Weld Neck Slip-On
NPS	Ring No.	R	K	L	M	Cl 300	Cl 400	Cl 600
26	R93	809.6	749.3	12.7	19.8	298 270	349 304	446 417
28	R94	860.4	800.1	12.7	19.8	360 333	409 364	518 482
30	R95	917.6	857.2	12.7	19.8	412 376	465 419	570 537
32	R96	984.2	914.4	14.3	23.0	465 425	539 482	697 622
34	R97	1035.0	965.2	14.3	23.0	536 492	608 540	735 670
36	R98	1092.2	1022.3	14.3	23.0	595 548	689 621	800 764

Indications..

NPS = Nominal Pipe Size
R = Raised Face (O.D.) Outside Diameter
K = Pitch Diameter
L = Groove Depth
M = Groove Width
r = Corner radius at bottom of groove 1.6 mm max

Dimensions and Tolerances BS 3293

TYPE OF FLANGES	INDICATIONS	TOL
Weld Neck and Slip-On flanges	Raised face diameter	±0.40
	Flange thickness	+4.76 -0
	Overall length	±3.18
	Outside diameter at welding end of weld neck hub	+3.97 -0.79
	Inside diameter of weld neck flange	+3.18 -1.59
	Inside diameter of slip on flange	+1.59 -0
Ring Joint Facing on Weld Neck and Slip-On flanges	Depth of groove	+0.40 -0
	Width of groove	±0.20
	Pitch diameter of groove	±0.13

General note..

All dimensions above are in millimeters unless otherwise indicated.

Manufacturing process of BS Flanges

BS flanges can be produced by forging, casting, cutting or rolling. We mainly produce flanges by forging, cutting and rolling processes.

Manufacturing process of BS forged flange

The forging process usually includes the following processes, i.e. selection of high quality billets, heating, forming and cooling.

Raw material inspection – The key raw material used to produce flanges is billet or hot rolled bar stock. All raw materials purchased are supplied with test reports in accordance with British Standards with full traceability. This is the first mandatory step in the flange production process to ensure good quality. The raw materials are retested in-house to ensure chemical composition, mechanical properties and metallographic analysis.
Cutting of raw materials – Correct and strict control of cutting sizes and proportions ensures full cost control.
Heating – This is a very important step for the quality of the flanges. It is necessary to keep detailed records of heating temperatures to avoid overheating. Overheating can damage the structure of the metal and the mechanical properties of the raw material.
Forging – The forging process is divided into free forging and die forging. The forging time and strength of flanges vary for different pressure classes.
Heat treatment-The purpose of heat treatment is to eliminate the stress inside the flange and make the density more uniform. Careful recording of heat treatment temperature and cooling time is the key.
Inspection of forging blanks – After the heat treatment process, select batch samples are tested again for chemical composition and mechanical properties to ensure that all items pass.
Machining of forging blanks – During machining, inspection is performed along with machining to ensure that each part of the flange is qualified. Machining is performed on CNC and/or lathes.
Finished Product Inspection – The finished product will be inspected 100% prior to delivery to ensure that the goods meet ASME, EN or customer standards.
Documented Documentation – The entire production process and quality checks at different levels are documented according to ISO compliant standard operating procedures. This is the guarantee of good quality.
Test certificates: As we are an ISO and PED certified manufacturer, we can issue test certificates for all goods upon delivery and inspection in accordance with British Standards.
Packaging: All forgings and flanges are packed in wooden boxes or crates or pallets to ensure safe movement of the goods.

Production process of BS casting flange

The production process of a BS casting flange typically involves several steps, including the creation of a mold or pattern, the casting of the flange using molten metal, and various finishing and quality control steps. To begin the process, a mold or pattern is created using a material such as wood or metal. This mold or pattern will be used to create the shape of the flange, and will typically be made to precise specifications to ensure that the final product meets the desired dimensions and specifications. Once the mold or pattern is ready, the casting process can begin. This typically involves melting the metal that will be used to create the flange, such as iron or steel, and pouring the molten metal into the mold or pattern. The metal is then allowed to cool and solidify, taking on the shape of the mold or pattern. After the casting process is complete, the flange will typically undergo various finishing and quality control steps. This may include machining or grinding to achieve the desired dimensions and surface finish, as well as testing to ensure that the flange meets the required specifications and standards. Overall, the production process for a BS casting flange is a highly precise and technical process that requires a thorough understanding of metallurgy, casting techniques, and quality control processes.

Manufacturing process of BS plate cutting flange

The process here is relatively simple, and the key raw material is hot rolled plate. The process is mainly used to produce lower thickness sliding plate flanges and blind flanges. All plates purchased are accompanied by a test certificate to British Standards. The circles are cut from the plates. No heat treatment is involved in the flange manufacturing process. Drilling and machining is carried out on the circles to obtain the required dimensions. The goods are visually inspected and marked in accordance with the relevant standards.

Marking of BS Flanges

BS flanges are usually marked with a code indicating the flange size and pressure rating. The code is usually printed on the flange or on a label printed on the flange. The code may also include other information such as the type of flange (e.g., weld neck, slip-on, etc.), the material used to make the flange, and the name or logo of the manufacturer. The exact format of the code may vary depending on the standard organization that created it, but it is usually a combination of letters and numbers. For example, a BS flange with a size of 10 inches and a pressure rating of 150 pounds per square inch (PSI) might be marked as “BS10 150#” or something similar.

Packing of BS Flanges

In terms of packing, it is important to properly pack the BS flanges to protect them during shipping and handling. This can typically be done using protective materials such as bubble wrap, foam sheets, or packaging peanuts to cushion the flanges and prevent them from being damaged. It is also important to properly label the package to indicate the contents and to ensure that it is handled with care during transport.

Inspection and measurement of BS Flanges

The inspection and measurement of these flanges is usually carried out in accordance with the relevant BS standards. This usually involves measuring the dimensions of the flange, such as the diameter and thickness of the flange and the size and shape of the bolt holes. In addition, the surface finish and overall condition of the flange should be checked for any defects or irregularities. BS flanges are typically inspected and measured using a variety of tools and methods to ensure they meet the necessary codes and standards. This can include measuring the dimensions of the flange using calipers and micrometers, as well as using visual inspection techniques to check for any defects or inconsistencies in the material. Other methods, such as x-ray or ultrasonic inspection, can also be used to check for internal defects that cannot be detected by visual inspection alone. The specific inspection and measurement methods used depend on the type and size of the flange and the specific requirements of the application.

Application of BS Flanges

British standard flanges are known to deliver exceptional performance and are generally developed for meeting the demands. We oer a broad range of BS Flanges through a worldwide network of stock-keeping branches. These british standard flange is use in various industries like:

Stainless Steel British Standard Flange uses in Oil and Gas Pipeline;
British Standard Flange uses in Chemical Industry;
Alloy Steel British Standard Flange uses in Plumbing;
British Standard Flange uses in Heating;
British Standard Pipe Flange uses in Water Supply Systems;
British Standard Flange uses in Power Plant;
British Standard Flanges uses in Paper & Pulp Industry;
British Standard Flange uses in General Purpose Applications;
British Standard Flange uses in Fabrication Industry;
British Standard Flange uses in Food Processing Industry;
British Standard Flange uses in Structural Pipe.

How to purchase the correct BS flanges?

To purchase the correct BS flange, you need to know the following information about BS flanges.
The type of BS flange you need: There are several types of BS flanges, including sliding flanges, butt-weld flanges, socket-weld flanges, threaded flanges and blind flanges. Make sure you select the correct type for your application.
Material of BS flanges: BS flanges are usually made of carbon steel, stainless steel or alloy steel. Select a material suitable for the fluid or gas flowing through the flange and for the operating temperature and pressure.
Special requirements for BS flanges: Any special requirements that the flange needs to meet, such as corrosion resistance or high temperature resistance.
Size of BS flanges: BS flanges are available in a variety of sizes, measured according to the diameter of the pipe or fitting to which the flange is connected. Make sure you select the correct size for your application.
Pressure rating of BS flanges: BS flanges are available in different maximum pressure ratings. Select the flange with the right pressure rating for your application.
Connection type of BS flanges: The connection type of BS flanges depends on the specific type of flange and the requirements of the piping system. Some common types of BS flanges include slip-on flanges, butt-weld flanges and threaded flanges. These flanges are typically connected to piping and other equipment using bolts, the number and size of which depend on the size and pressure rating of the flange. In general, BS flanges are designed to provide a strong and reliable connection that can withstand the pressure and temperature conditions of the piping system.
Welding and machining requirements: If BS flanges are to be welded to pipe or fittings, ensure that you select a flange that is compatible with the welding equipment and has the correct machining tolerances. BS flange manufacturer: It is important to choose a reputable and reliable manufacturer to ensure that the BS flange is of high quality and meets the proper standards.
Once you have this information, you can contact the supplier or manufacturer of the BS flange to order. You may also need to provide technical drawings or specifications to ensure that you receive the correct flange.

How to select BS flanges manufacturer?

Choosing a BS flange manufacturer can be a challenging task as there are many factors to consider and it is important to choose a reliable and reputable company. Here are some tips to help you in your search. Start by researching the different manufacturers available in the market. Look for companies that have experience and expertise in manufacturing BS flanges. You can seek advice from other industry professionals or search online for companies that specialize in this type of product. Consider the manufacturer’s reputation. Look for companies that have a proven track record and a reputation for producing quality products. You can check customer reviews and ratings to get an idea of a company’s reputation. Look for a manufacturer that offers BS flanges in a variety of sizes, materials and grades. This will ensure that you can find the right flange for your specific application and needs. Consider the cost of the flange. While cost is an important factor, it should not be the only consideration when choosing a manufacturer. Be sure to compare prices from different companies to get an idea of market prices. Check the delivery time and availability of the flange. Choose a manufacturer that can deliver flanges on time and has a proven track record of meeting delivery deadlines. Consider the customer service offered by the manufacturer. A good manufacturer will have a team of knowledgeable and experienced employees who can help you with any questions or concerns you may have about the flange. Look for a manufacturer that offers after-sales support and technical assistance. This will ensure that you can get the support you need if any problems arise with the flange after it is installed. Ensure that the manufacturer complies with all industry standards and regulations. Choose a company that is certified by the relevant authorities and has a proven track record of compliance with industry standards. In short, choosing the right BS flange manufacturer requires careful consideration and research. By taking the time to evaluate different companies and considering the above factors, you can find a manufacturer that meets your needs and provides a quality flange for your specific application.

Export Country For BS Flanges

MIDDLE EAST	AFRICA	NORTH AMERICA	EUROPE	ASIA	SOUTH AMERICA
Saudi Arabia	Nigeria	Usa	Russia	India	Argentina
Iran	Algeria	Canada	Norway	Singapore	Bolivia
Iraq	Angola	Mexico	Germany	Malaysia	Brazil
Uae	South Africa	Panama	France	Indonesia	Chile
Qatar	Libya	Costa Rica	Italy	Thailand	Venezuela
Bahrain	Egypt	Puerto Rica	Uk	Vietnam	Colombia
Oman	Sudan	Trinidad And Tobago	Spain	South Korea	Ecuador
Kuwait	Equatorial Guinea	Jamaica	Ukraine	Japan	Guyana
Turkey	The Republic Of Congo	Bahamas	Netherland	Sri Lanka	Paraguay
Yemen	Gabon	Denmark	Belgium	Maldives	Uruguay
Syria			Greece	Bangladesh
Jordan			Czech Republic	Mayanmar
Cyprus			Portugal	Taiwan
			Hungary	Cambodia
			Albania
			Austria
			Switzerland
			Slovakia
			Finland
			Ireland
			Croatia
			Slovenia
			Malta

British Standard Flanges

BS Flanges Solutions

Table of Contents

What are British Standard Flanges?

Standard Specication For British Standard Flanges

Advantages and disadvantage of British Standard Flanges

What are the different types of British Standard Flanges?

Material of British Standard Flanges

Size of BS Flanges

Dimensions of British Standard Flanges

Dimensions of BS 4504 Flange

BS 4504 PN2.5 Flange Dimensions

BS 4504 PN6 Flange Dimensions

BS 4504 PN10 Flange Dimensions

BS 4504 PN16 Flange Dimenisons

BS 4504 PN25 Flange Dimenisons

BS 4504 PN40 Flange Dimenisons

ANSI B16.5 Class 150 BS 4504 Flange Pressure Ratings

Dimensions of BS 10 Flange

BS 10 Table D Flange Dimensions

BS 10 Table E Flange Dimensions

BS 10 Table F Flange Dimensions

BS 10 Table H Flange Dimenisons

BS 10 Table J Flange Dimenisons

BS 10 Flanges Sizes Chart

BS 10 Pipe Flanges Weight Chart

Stainless Steel BS 10 Flanges Pressure Ratings

Dimensions of BS 3293 Weld Neck & Slip-On Flanges

Dimensions of BS 3293 Class 150 Weld Neck & Slip-On Flanges

Dimensions of BS 3293 Class 300 Weld Neck & Slip-On Flanges

Dimensions of BS 3293 Class 400 Weld Neck & Slip-On Flanges

Dimensions of BS 3293 Class 600 Weld Neck & Slip-On Flanges

Manufacturing process of BS Flanges

Manufacturing process of BS forged flange

Production process of BS casting flange

Manufacturing process of BS plate cutting flange

Marking of BS Flanges

Packing of BS Flanges

Inspection and measurement of BS Flanges

Application of BS Flanges

How to purchase the correct BS flanges?

How to select BS flanges manufacturer?

Export Country For BS Flanges