AWWA C207 Flanges

What are AWWA C207 flanges?

AWWA C207 flanges are flanges that are designed to meet the specifications of the American Water Works Association (AWWA) standard C207, which covers steel ring flanges for waterworks service. These flanges are typically used in waterworks piping systems to connect pipe sections or to connect pipes to other equipment, such as valves or pumps. They are typically made from carbon steel and are available in a range of sizes and pressure ratings to suit different applications.

Advantages and disadvantage of AWWA C207 flanges

AWWA C207 flanges are designed and manufactured according to the American Water Works Association’s standards for steel flanges. These flanges are known for their strength and durability, making them suitable for use in a wide range of water-related applications.

Advantages of AWWA C207 flanges

One of the main advantages of AWWA C207 flanges is that they are designed to withstand high pressure and can be used in a variety of piping systems, including those used for drinking water, wastewater, and irrigation. These flanges are also easy to install and can be used with a wide range of pipe materials, including stainless steel, carbon steel, and alloy steel. Another advantage of AWWA C207 flanges is that they are made from high-quality materials and are subjected to strict quality control standards, which helps ensure that they will perform reliably and last for many years. Additionally, these flanges are available in a range of sizes, which makes it easy to find the right flange for your specific application.

Disadvantage of AWWA C207 flanges

One potential disadvantage of AWWA C207 flanges is that they are made from steel, which can rust over time if not properly maintained. This means that if these flanges are used in applications where they are exposed to water, they will need to be regularly inspected and maintained to prevent corrosion. In some cases, this may require the use of protective coatings or other measures to prevent rusting. The main advantages of AWWA C207 flanges are their strength, durability, and versatility, while the main disadvantage is the potential for corrosion if not properly maintained. These flanges are suitable for a wide range of applications, but it is important to consider the potential for rusting and take appropriate measures to prevent it.

AWWA Flange Standards Vs. ANSI Flange Standards

AWWA flange standard and ANSI flange standard are two main flange standards, both of which are widely used in connection of pipeline system. However, there are many differences between the two. First of all, AWWA flange standards are formulated by the American Water Association and are mainly used for connection of pipeline systems in the United States. The ANSI flange standard is formulated by the American National Standards Institute, and is widely used in the connection of piping systems in North America. It can be seen that the application scope of AWWA flange standard is smaller than that of ANSI flange standard. Secondly, AWWA flange standards are mainly applicable to water supply pipeline systems, while ANSI flange standards are applicable to various types of pipeline systems, including water supply, drainage, gas, steam, chemical, etc. This also means that the application scope of AWWA flange standard is narrower than ANSI flange standard. AWWA flange standards specify the design and manufacturing requirements of flanges, including flange size, materials, surface treatment, joint form and performance indicators. ANSI flange standards pay more attention to the installation and operation requirements of flanges, such as installation distance, installation position, support mode, removal method, etc. The AWWA flange standard specifies the surface treatment method of the flange, including anti-corrosion coating, hot galvanizing and electro galvanizing. ANSI flange standard does not specify the surface treatment method of flange, and carbon steel flange is generally hot-dip galvanized. In addition, AWWA flange standards and ANSI flange standards also have some differences in flange dimensions. The flange dimensions in AWWA flange standards are mainly divided into three types, namely 12 inch, 16 inch and 24 inch. Among them, 12 inch and 16 inch are mainly used for small pipe systems, and 24 inch are used for medium and large pipe systems. The flange dimensions in ANSI flange standards are more complex, which are mainly divided into 6 types, namely 150, 300, 600, 900, 1500 and 2500. However, AWWA standards also specify some special dimensions, such as “oversize flange” and “oversize flange”, for special applications.

What are the different types of AWWA C207 flanges?

AWWA C207 flanges are flanges that are designed to meet the standards set by the American Water Works Association (AWWA) for use in water supply systems. The standard has specified two general types of flange:

(1) Ring-type slip-on flanges, also known as ring flanges or plate flanges.

(2) Blind flanges. Both the ring flange and blind flange are steel flanges without hub.

(3) Hub flange. Hub flanges and hubbed slip-on welding flanges are similar in shape. The AWWA C207 flange can be further classified into four classes according to its working pressure limit: Class B (86 psi), Class D (175-150 psi), Class E (275 psi), Class F (300 psi). The pressure limits are for conditions and temperatures customary in water utility service.

• Class D flanges: These flanges are designed for use with steel pipe and are the most common type of AWWA C207 flange. They are available in sizes ranging from 4 inches to 144 inches in diameter.
• Class E flanges: These flanges are designed for use with ductile iron pipe and are similar to Class D flanges in terms of size and design.
• Class F flanges: These flanges are designed for use with asbestos cement pipe and are available in sizes ranging from 4 inches to 48 inches in diameter.
• Class H flanges: These flanges are designed for use with plastic pipe and are available in sizes ranging from 4 inches to 48 inches in diameter.
• Class J flanges: These flanges are designed for use with concrete pipe and are available in sizes ranging from 4 inches to 144 inches in diameter.

Material of AWWA C207 Flanges

AWWA C207 flanges are typically made from cast or forged carbon steel, stainless steel, or other alloy materials. The specific material used will depend on the application and the design specifications of the flange. It is important to choose the right material for a flange to ensure that it is strong and durable enough to handle the pressure and temperature conditions it will be subjected to in service.

• Stainless Steel AWWA C207 Flanges: ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L
• Duplex & Super Duplex Steel AWWA C207 Flanges : ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61
• Carbon Steel AWWA C207 Flanges: ASTM / ASME A/SA 105 ASTM / ASME A 350 , ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F706
• Low Temperature Carbon Steel AWWA C207 Flanges: ASTM A350, LF2, LF3
• Alloy Steel AWWA C207 Flanges: ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91
• Copper Alloy Steel AWWA C207 Flanges: ASTM SB 61 , SB62 , SB151 , SB152 UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200
• Nickel Alloy AWWA C207 Flanges: ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020)

Size of AWWA C207 flanges

AWWA C207 flanges are available in a range of sizes, from 4 inches to 144 inches in diameter. The size of the flange you need will depend on the specific application and the size of the piping system it will be used with. It’s always best to consult with a professional or refer to the specific standards for your project to determine the appropriate size for your needs.

Dimensions of AWWA C207 flanges

AWWA C207 flanges are pipe flanges that are used in the American Water Works Association (AWWA) standard C207 for steel pipe flanges. The dimensions of these flanges are specified in the standard, which is available from the AWWA. The standard covers a range of sizes, from 26 inches to 144 inches in diameter. The dimensions of the flanges depend on the size of the pipe and the pressure rating of the flange, which are both specified in the standard. The dimensions of AWWA C207 flanges are specified in inches. The flange size is the outside diameter of the flange, and the pressure rating is the maximum allowable pressure that the flange can handle. The standard also specifies the bolt circle diameter, bolt hole diameter, and the number of bolts for each size and pressure rating of the flange. For example, a 26-inch flange with a Class D pressure rating has an outside diameter of 31.75 inches, a bolt circle diameter of 27.25 inches, and a bolt hole diameter of 1.25 inches. It uses 8 bolts, and the bolts are spaced 45 degrees apart. These dimensions are specified in the standard and are used to ensure that the flange fits properly and can handle the specified pressure.

Dimensions and masses of AWWA C207 Ring Flange

AWWA C207 Class B Ring Flange (86 psi*)

AWWA C207 Class B steel ring flanges. The working pressure limit at water service temperature is 86 psi and the maximum pressure (test or transient) allowed can be up to 129 psi.  

Nom Size	Thickness				Drilling			Weight
	OD	Slip-On	Blind	Bore	Bolt Circle	Hole Dia	No. Holes	Slip-on	Blind
	A	T	T	B	C
4	9	0.625	0.625	4.57	7.5	0.75	8	8	11
5	10	0.625	0.625	5.66	8.5	0.875	8	9	14
6	11	0.688	0.688	6.72	9.5	0.875	8	11	19
8	13.5	0.688	0.688	8.72	11.75	0.875	8	15	28
10	16	0.688	0.688	10.88	14.25	1	12	19	39
12	19	0.688	0.719	12.88	17	1	12	28	58
14	21	0.688	0.791	14.19	18.75	1.125	12	34	78
16	23.5	0.688	0.892	16.19	21.25	1.125	16	41	110
18	25	0.688	0.95	18.19	22.75	1.25	16	41	132
20	27.5	0.688	1.04	20.19	25	1.25	20	49	175
22	29.5	0.75	1.132	22.19	27.25	1.375	20	57	219
24	32	0.75	1.216	24.19	29.5	1.375	20	67	277
26	34.25	0.812	1.307	26.19	31.75	1.375	24	80	341
28	36.5	0.875	1.398	28.19	34	1.375	28	94	414
30	38.75	0.875	1.477	30.19	36	1.375	28	105	493
32	41.75	0.936	1.581	32.19	38.5	1.625	28	132	613
34	43.75	0.938	1.661	34.19	40.5	1.625	32	137	707
36	46	1	1.751	36.19	42.75	1.625	32	161	824
38	48.75	1	1.853	38.19	45.25	1.625	32	185	980
40	50.75	1	1.933	40.19	47.25	1.625	36	193	1108
42	53	1.125	2.023	42.19	49.5	1.625	36	234	1264
44	55.25	1.125	2.114	44.19	51.75	1.625	40	249	1436
46	57.25	1.125	2.194	46.19	53.75	1.625	40	260	1600
48	59.5	1.25	2.285	48.19	56	1.625	44	306	1800
50	61.75	1.25	2.377	50.19	58.25	1.875	44	317	2017
52	64	1.25	2.468	52.19	60.5	1.875	44	339	2249
54	66.25	1.375	2.559	54.19	62.75	1.875	44	397	2499
60	73	1.5	2.82	60.19	69.25	1.875	52	508	3344
66	80	1.625	3.092	66.19	76	1.875	52	664	4403
72	86.5	1.75	3.353	72.19	82.5	1.875	60	802	5582
78	93	2	……	78.19	89	2.125	64	1000	……
84	99.75	2	……	84.19	95.5	2.125	64	1145	……
90	106.5	2.25	……	90.19	102	2.438	68	1404	……
96	113.25	2.25	……	96.19	108.5	2.438	68	1586	……
102	120	2.5	……	102.19	114.5	2.688	72	1912	……
108	126.75	2.5	……	108.19	120.75	2.688	72	2136	……
114	133.5	2.75	……	114.19	126.75	2.938	76	2525	……
120	140.25	2.75	……	120.19	132.75	2.938	76	2795	……
126	147	3	……	126.19	139.25	3.188	80	3252	……
132	153.75	3	……	132.19	145.75	3.188	80	3572	……
138	160.5	3.25	……	138.19	152	3.438	84	4101	……
144	167.25	3.25	……	144.19	158.25	3.438	84	4475	……

• The purchaser shall specify the ID of the flange, dimension B, for NPS 26″ and larger. The diameter of the flange bore shall not exceed the pipe OD by more than 0.25″.
• Dimensions of AWWA C207 Class B ring flange are the same as that of Class D ring flange except for the thickness of flange, T.
• For flanges up to NPS 84″, bolt holes shall be drilled 1/8″ [3.2 mm] larger in diameter than the nominal diameter of the bolt. For flanges larger than 84″, bolt holes shall be drilled 3/16″ [4.8 mm] larger than the nominal bolt diameter.

AWWA C207 Class D Ring Flange (175-150 psi)

AWWA C207 Class D steel ring flanges. The working pressure limit at water service temperature for sizes 4″~12″ inclusive is 175 psi; that for sizes larger than 12″ is 150 psi.  

Nom Size		Thickness			Drilling			Weight
	OD	Slip-On	Blind	Bore	Bolt Circle	Hole Dia	No Holes	Slip-on	Blind
	A	T	T	B	C
4	9	0.625	0.625	4.57	7.5	0.75	8	8	11
5	10	0.625	0.65	5.66	8.5	0.875	8	9	14
6	11	0.688	0.693	6.72	9.5	0.875	8	11	19
8	13.5	0.688	0.812	8.72	11.75	0.875	8	15	33
10	16	0.688	0.953	10.88	14.25	1	12	19	54
12	19	0.812	1.117	12.88	17	1	12	33	90
14	21	0.938	1.133	14.19	18.75	1.125	12	47	111
16	23.5	1	1.265	16.19	21.25	1.125	16	60	155
18	25	1.062	1.331	18.19	22.75	1.25	16	64	185
20	27.5	1.125	1.448	20.19	25	1.25	20	79	244
22	29.5	1.188	1.568	22.19	27.25	1.375	20	90	304
24	32	1.25	1.661	24.19	29.5	1.375	20	112	378
26	34.25	1.312	1.786	26.19	31.75	1.375	24	129	466
28	36.5	1.312	1.906	28.19	34	1.375	28	141	565
30	38.75	1.375	2.008	30.19	36	1.375	28	164	671
32	41.75	1.5	2.15	32.19	38.5	1.625	28	211	834
34	43.75	1.5	2.252	34.19	40.5	1.625	32	220	959
36	46	1.625	2.37	36.19	42.75	1.625	32	261	1116
38	48.75	1.625	2.506	38.19	45.25	1.625	32	301	1325
40	50.75	1.625	2.609	40.19	47.25	1.625	36	313	1438
42	53	1.75	2.729	42.19	49.5	1.625	36	364	1706
44	55.25	1.75	2.849	44.19	51.75	1.625	40	387	1935
46	57.25	1.75	2.952	46.19	53.75	1.625	40	404	2153
48	59.5	1.875	3.072	48.19	56	1.625	44	460	2420
50	61.75	2	3.196	50.19	58.25	1.875	44	507	2712
52	64	2	3.315	52.19	60.5	1.875	44	542	3021
54	66.25	2.125	3.435	54.19	62.75	1.875	44	614	3355
60	73	2.25	3.779	60.19	69.25	1.875	52	763	4481
66	80	2.5	4.136	66.19	76	1.875	52	1021	5890
72	86.5	2.625	4.48	72.19	82.5	1.875	60	1203	7458
78	93	2.75	……..	78.19	89	2.125	64	1374	……..
84	99.75	2.875	……..	84.19	95.5	2.125	64	1646	……..
90	106.5	3	……..	90.19	102	2.438	68	1872	……..
96	113.25	3.25	……..	96.19	108.5	2.438	68	2291	……..
102	120	3.25	……..	102.19	114.5	2.688	72	2485	…….
108	126.75	3.375	……..	108.19	120.75	2.688	72	2884	……..
114	133.5	3.5	……..	114.19	126.75	2.938	76	3214	……..
120	140.25	3.5	……..	120.19	132.75	2.938	76	3558	……..
126	147	3.75	……..	126.19	139.25	3.188	80	4065	……..
132	153.75	3.875	……..	132.19	145.75	3.188	80	4614	…….
138	160.5	4	……..	138.19	152	3.438	84	5047	……..
144	167.25	4.125	……..	144.19	158.25	3.438	84	5680	……..

• Pressure rating at atmospheric temperature: sizes 4-12 in. inclusive, 175 psi; sizes larger than 12 in., 150 psi. These flanges have the same OD and drilling as ANSI/ASME B16.1 class 125 cast-iron flanges. In sizes 24in. and smaller, they also match ANSI/ASME B16.5 150-psi standard for steel flanges.
• The purchaser shall specify the ID of the flange, dimension B, for NPS 26″ and larger. The diameter of the flange bore shall not exceed the pipe OD by more than 0.25″.
• Dimensions of AWWA C207 Class D ring flange are the same as that of Class B ring flange except for the thickness of flange, T.
• For flanges up to NPS 84″, bolt holes shall be drilled 1/8″ [3.2 mm] larger in diameter than the nominal diameter of the bolt. For flanges larger than 84″, bolt holes shall be drilled 3/16″ [4.8 mm] larger than the nominal bolt diameter.

AWWA C207 Class E Ring Flange (275 psi*)

AWWA C207 Class E steel ring flanges. The working pressure limit at water service temperature is 275 psi and the maximum pressure (test or transient) allowed can be up to 412.5 psi.  

Nom Size		Thickness			Drilling			Weight
	OD	Slip-On	Blind	Bore	Bolt Circle	Hole Dia	No. Holes	Slip-on	Blind
	A	T	T	B	C
4	9	1.125	1.125	4.57	7.5	0.75	8	14	20
5	10	1.188	1.188	5.66	8.5	0.875	8	16	26
6	11	1.313	1.313	6.72	9.5	0.875	8	20	35
8	13.5	1.5	1.5	8.72	11.75	0.875	8	33	61
10	16	1.563	1.563	10.88	14.25	1	12	44	89
12	19	1.75	1.75	12.88	17	1	12	71	141
14	21	1.875	1.875	14.19	18.75	1.125	12	94	184
16	23.5	2	2	16.19	21.25	1.125	16	120	246
18	25	2.125	2.125	18.19	22.75	1.25	16	127	296
20	27.5	2.375	2.375	20.19	25	1.25	20	168	400
22	29.5	2.5	2.5	22.19	27.25	1.375	20	189	484
24	32	2.625	2.625	24.19	29.5	1.375	20	234	598
26	34.25	2.75	2.75	26.19	31.75	1.375	24	270	718
28	36.5	2.75	2.75	28.19	34	1.375	28	297	815
30	38.75	2.875	2.875	30.19	36	1.375	28	344	961
32	41.75	3	3	32.19	38.5	1.625	28	422	1163
34	43.75	3	3.05	34.19	40.5	1.625	32	441	1299
36	46	3.125	3.209	36.19	42.75	1.625	32	502	1511
38	48.75	3.125	3.394	38.19	45.25	1.625	32	580	1795
40	50.75	3.25	3.533	40.19	47.25	1.625	36	626	2025
42	53	3.375	3.695	42.19	49.5	1.625	36	701	2309
44	55.25	3.375	3.857	44.19	51.75	1.625	40	747	2715
46	57.25	3.438	3.997	46.19	53.75	1.625	40	794	2813
48	59.5	3.5	4.159	48.19	56	1.625	44	858	3276
50	61.75	3.5	4.327	50.19	58.25	1.875	44	887	3671
52	64	3.625	4.489	52.19	60.5	1.875	44	982	4091
54	66.25	3.75	4.651	54.19	62.75	1.875	44	1083	4542
60	73	3.875	5.116	60.19	69.25	1.875	52	1313	6066
66	80	4.25	5.601	66.19	76	1.875	52	1736	7976
72	86.5	4.375	6.066	72.19	82.5	1.875	60	2005	10099
78	93	4.75	……..	78.19	89	2.125	64	2374	……..
84	99.75	4.75	……..	84.19	95.5	2.125	64	2719	……..
90	106.5	5.125	……..	90.19	102	2.438	68	3197	……..
96	113.25	5.125	……..	96.19	108.5	2.438	68	3613	……..
102	120	5.5	……..	102.19	114.5	2.688	72	4206	……..
108	126.75	5.5	……..	108.19	120.75	2.688	72	4700	……..
114	133.5	5.875	……..	114.19	126.75	2.938	76	5395	……..
120	140.25	5.875	……..	120.19	132.75	2.938	76	5972	……..
126	147	6.25	……..	126.19	139.25	3.188	80	6775	……..
132	153.75	6.25	……..	132.19	145.75	3.188	80	7442	……..
138	160.5	6.75	……..	138.19	152	3.438	84	8517	……..
144	167.25	6.75	……..	144.19	158.25	3.438	84	9295	……..

• Pressure rating at atmospheric temperature is 275 psi. These flanges have the same OD and drilling as ANSI/ASME B16.1 class 125 cast-iron flanges. In sizes 24in. and smaller, they also match ANSI/ASME B16.5 150-psi standard for steel flanges.
• The purchaser shall specify the ID of the flange, dimension B, for NPS 26″ and larger. The diameter of the flange bore shall not exceed the pipe OD by more than 0.25″.
• For flanges up to NPS 84″, bolt holes shall be drilled 1/8″ [3.2 mm] larger in diameter than the nominal diameter of the bolt. For flanges larger than 84″, bolt holes shall be drilled 3/16″ [4.8 mm] larger than the nominal bolt diameter.

AWWA C207 Class F Ring Flange (300 psi*)

AWWA C207 Class F steel ring flanges. The working pressure limit at water service temperature is 275 psi. The maximum pressure (test or transient) allowed can be up to 450 psi.  

Nom Size		Thickness			Drilling			Weight
	OD	Slip-On	Blind	Bore	Bolt Circle	Hole Dia	No. Holes	Slip-on	Blind
	A	T	T	B	C
4	10	1.13	1.13	4.57	7.88	0.875	8	18	25
5	11	1.21	1.21	5.66	9.25	0.875	8	22	33
6	12.5	1.31	1.31	6.73	10.62	0.875	12	30	46
8	15	1.31	1.31	8.73	13	1	12	40	66
10	17.5	1.5	1.5	10.88	15.25	1.125	16	56	102
12	20.5	1.63	1.63	12.88	17.75	1.25	16	83	152
14	23	1.94	1.94	14.19	20.25	1.25	20	128	228
16	25.5	2.14	2.14	16.19	22.5	1.375	20	167	310
18	28	2.25	2.25	18.19	24.75	1.375	24	204	392
20	30.5	2.33	2.33	20.19	27	1.375	24	247	482
22	33	2.5	2.5	22.19	29.25	1.375	24	307	606
24	36	2.69	2.69	24.19	32	1.625	24	388	776
26	38.25	3	3	26.19	34.5	1.875	28	451	977
28	40.75	3.13	3.13	28.19	37	1.875	28	532	1156
30	43	3.15	3.166	30.19	39.25	1.875	28	586	1303
32	45.25	3.25	3.332	32.19	41.5	1.875	28	657	1518
34	47.5	3.38	3.475	34.19	43.5	1.875	28	741	1745
36	50	3.46	3.671	36.19	46	2.125	32	802	2042
38	52.25	3.5	3.815	38.19	48	2.125	32	874	2317
40	54.25	3.63	3.982	40.19	50.25	2.125	36	937	2608
42	57	3.81	4.171	42.19	52.75	2.125	36	1103	3015
44	59.25	4	4.338	44.19	55	2.125	36	1237	3388
46	61.5	4.13	4.505	46.19	57.25	2.125	40	1344	3791
48	65	4.5	4.781	48.19	60.75	2.125	40	1718	4494

• Pressure rating at atmospheric temperature is 300 psi. These flanges have the same OD and drilling as ANSI/ASME B16.1 class 250 cast-iron pipe and flanged fittings.
• The purchaser shall specify the ID of the flange, dimension B, for NPS 26″ and larger. The diameter of the flange bore shall not exceed the pipe OD by more than 0.25″.
• Bolt holes shall be drilled 1/8″ [3.2 mm] larger in diameter than the nominal diameter of the bolt.

Dimensions and masses of AWWA C207 Blind Flange

AWWA C207 Class B Blind Flange

AWWA C207 Class B blind flange, with flat face (FF), available from 4″ through 72″.

N.P.S	OD	Thick.		Bore	Drilling			Weight
		BLRF	SORF		Number Holes	Bolt Circle	Hole Dia	SORF	BLRF
	A	T	T	B		C
4	9	0.625	0.625	4.57	8	7.5	0.75	8	11
5	10	0.625	0.625	5.66	8	8.5	0.875	9	14
6	11	0.688	0.688	6.72	8	9.5	0.875	11	19
8	13.5	0.688	0.688	8.72	8	11.75	0.875	15	28
10	16	0.688	0.688	10.88	12	14.25	1	19	39
12	19	0.719	0.688	12.88	12	17	1	28	58
14	21	0.791	0.688	14.19	12	18.75	1.125	34	78
16	23.5	0.892	0.688	16.19	16	21.25	1.125	41	110
18	25	0.95	0.688	18.19	16	22.75	1.25	41	132
20	27.5	1.04	0.688	20.19	20	25	1.25	49	175
22	29.5	1.132	0.75	22.19	20	27.25	1.375	57	219
24	32	1.216	0.75	24.19	20	29.5	1.375	67	277
26	34.25	1.307	0.812	26.19	24	31.75	1.375	80	341
28	36.5	1.398	0.875	28.19	28	34	1.375	94	414
30	38.75	1.477	0.875	30.19	28	36	1.375	105	493
32	41.75	1.581	0.936	32.19	28	38.5	1.625	132	613
34	43.75	1.661	0.938	34.19	32	40.5	1.625	137	707
36	46	1.751	1	36.19	32	42.75	1.625	161	824
38	48.75	1.853	1	38.19	32	45.25	1.625	185	980
40	50.75	1.933	1	40.19	36	47.25	1.625	193	1108
42	53	2.023	1.125	42.19	36	49.5	1.625	234	1264
44	55.25	2.114	1.125	44.19	40	51.75	1.625	249	1436
46	57.25	2.194	1.125	46.19	40	53.75	1.625	260	1600
48	59.5	2.285	1.25	48.19	44	56	1.625	306	1800
50	61.75	2.377	1.25	50.19	44	58.25	1.875	317	2017
52	64	2.468	1.25	52.19	44	60.5	1.875	339	2249
54	66.25	2.559	1.375	54.19	44	62.75	1.875	397	2499
60	73	2.82	1.5	60.19	52	69.25	1.875	508	3344
66	80	3.092	1.625	66.19	52	76	1.875	664	4403
72	86.5	3.353	1.75	72.19	60	82.5	1.875	802	5582
78	93		2	78.19	64	89	2.125	1000
84	99.75		2	84.19	64	95.5	2.125	1145
90	106.5		2.25	90.19	68	102	2.438	1404
96	113.25		2.25	96.19	68	108.5	2.438	1586
102	120		2.5	102.19	72	114.5	2.688	1912
108	126.75		2.5	108.19	72	120.75	2.688	2136
114	133.5		2.75	114.19	76	126.75	2.938	2525
120	140.25		2.75	120.19	76	132.75	2.938	2795
126	147		3	126.19	80	139.25	3.188	3252
132	153.75		3	132.19	80	145.75	3.188	3572
138	160.5		3.25	138.19	84	152	3.438	4101
144	167.25		3.25	144.19	84	158.25	3.438	4475

• For AWWA C207 Class B blind, the minimum thickness is based on allowable stress of 16000 psi and allowable bolt stress of 7000 psi.

AWWA C207 Class D Blind Flange

AWWA C207 Class D blind flange, with flat face (FF), available from 4″ through 72″.

NPS	A	T	Mass	n	C	d
4″	9	0.625	4.83	8	7.5	0.625
5″	10	0.65	6.16	8	8.5	0.75
6″	11	0.693	8.04	8	9.5	0.75
8″	13.5	0.812	14.45	8	11.75	0.75
10″	16	0.953	23.49	12	14.25	0.875
12″	19	1.117	39.39	12	17	0.875
14″	21	1.133	48.74	12	18.75	1
16″	23.5	1.265	67.99	16	21.25	1
18″	25	1.331	80.68	16	22.75	1.125
20″	27.5	1.448	106.06	20	25	1.125
22″	29.5	1.568	131.87	20	27.25	1.25
24″	32	1.661	165.5	20	29.5	1.25
26″	34.25	1.786	203.48	24	31.75	1.25
28″	36.5	1.906	246.35	28	34	1.25
30″	38.75	2.008	293.89	28	36	1.25
32″	41.75	2.15	362.57	28	38.5	1.5
34″	43.75	2.252	416.27	32	40.5	1.5
36″	46	2.37	486.44	32	42.75	1.5
38″	48.75	2.506	580.32	32	45.25	1.5
40″	50.75	2.609	653.84	36	47.25	1.5
42″	53	2.729	748.28	36	49.5	1.5
44″	55.25	2.849	848.25	40	51.75	1.5
46″	57.25	2.952	946.02	40	53.75	1.5
48″	59.5	3.072	1062.73	44	56	1.5
50″	61.75	3.196	1181.29	44	58.25	1.75
52″	64	3.315	1320.03	44	60.5	1.75
54″	66.25	3.435	1469.52	44	62.75	1.75
60″	73	3.779	1964.82	52	69.25	1.75
66″	80	4.136	2597.98	52	76	1.75
72″	86.5	4.48	3291.18	60	82.5	1.75

• A: outside diameter of flange, inch; T: minimum thickness of flange, inch; Mass: weight of flange, kg.
• For AWWA C207 Class D blind, the minimum thickness is based on allowable stress of 16000 psi and allowable bolt stress of 7000 psi.
• n: number of bolts; C: diameter of bolt circle, inch; d: diameter of bolts.

AWWA C207 Class E Blind Flange

AWWA C207 Class E blind flange, with flat face (FF), available from 4″ through 72″.  

NPS	A	T	Mass	n	C	d
4″	9	1.125	8.7	8	7.5	0.625
5″	10	1.188	11.27	8	8.5	0.75
6″	11	1.313	15.24	8	9.5	0.75
8″	13.5	1.5	26.69	8	11.75	0.75
10″	16	1.563	38.53	12	14.25	0.875
12″	19	1.75	61.71	12	17	0.875
14″	21	1.875	80.66	12	18.75	1
16″	23.5	2	107.5	16	21.25	1
18″	25	2.125	128.82	16	22.75	1.125
20″	27.5	2.375	173.97	20	25	1.125
22″	29.5	2.5	210.26	20	27.25	1.25
24″	32	2.625	261.55	20	29.5	1.25
26″	34.25	2.75	313.32	24	31.75	1.25
28″	36.5	2.75	355.44	28	34	1.25
30″	38.75	2.875	420.78	28	36	1.25
32″	41.75	2.875	505.91	28	38.5	1.5
34″	43.75	3.05	563.78	32	40.5	1.5
36″	46	3.209	658.64	32	42.75	1.5
38″	48.75	3.394	785.96	32	45.25	1.5
40″	50.75	3.533	885.41	36	47.25	1.5
42″	53	3.695	1013.15	36	49.5	1.5
44″	55.25	3.857	1148.37	40	51.75	1.5
46″	57.25	3.997	1280.91	40	53.75	1.5
48″	59.5	4.159	1438.77	44	56	1.5
50″	61.75	4.327	1599.32	44	58.25	1.75
52″	64	4.489	1787.52	44	60.5	1.75
54″	66.25	4.651	1989.74	44	62.75	1.75
60″	73	5.116	2659.97	52	69.25	1.75
66″	80	5.601	3518.2	52	76	1.75
72″	86.5	6.066	4456.32	60	82.5	1.75

• A: outside diameter of flange, inch; T: minimum thickness of flange, inch; Mass: weight of flange, kg.
• n: number of bolts; C: diameter of bolt circle, inch; d: diameter of bolts.
• For AWWA C207 Class E blind, the minimum thickness is based on allowable stress of 16000 psi and allowable bolt stress of 25000 psi.

AWWA C207 Class F Blind Flange

AWWA C207 Class F blind flange, with flat face (FF), available from 4″ through 48″.  

NPS	A	T	MASS	n	C	d
4″	10	1.13	10.72	8	7.88	0.75
5″	11	1.21	14.04	8	9.25	0.75
6″	12.5	1.31	19.46	12	10.62	0.75
8″	15	1.31	28.19	12	13	0.875
10″	17.5	1.5	43.34	16	15.25	1
12″	20.5	1.63	65.09	16	17.75	1.125
14″	23	1.94	97.56	20	20.25	1.125
16″	25.5	2.14	132.41	20	22.5	1.25
18″	28	2.25	167.91	24	24.75	1.25
20″	30.5	2.33	208.3	24	27	1.25
22″	33	2.5	263.6	24	29.25	1.25
24″	36	2.69	335	24	32	1.5
26″	38.25	3	413.61	28	34.5	1.75
28″	40.75	3.13	493.99	28	37	1.75
30″	43	3.166	559.95	28	39.25	1.75
32″	45.25	3.332	656.15	28	41.5	1.75
34″	47.5	3.475	757.58	28	43.5	1.75
36″	50	3.671	873.63	32	46	2
38″	52.25	3.815	996.58	32	48	2
40″	54.25	3.982	1118.63	36	50.25	2
42″	57	4.171	1300.64	36	52.75	2
44″	59.25	4.338	1467.36	36	55	2
46″	61.5	4.505	1639.28	40	57.25	2
48″	65	4.781	1953.58	40	60.75	2

• A: outside diameter of flange, inch; T: minimum thickness of flange, inch; Mass: weight of flange, kg.
• n: number of bolts; C: diameter of bolt circle, inch; d: diameter of bolts.
• For AWWA C207 Class E blind, the minimum thickness is based on allowable stress of 16000 psi and allowable bolt stress of 25000 psi.

Dimensions and masses of AWWA C207 Hub Flange

AWWA C207 Class D Hub Flange (175-150 psi*)

AWWA C207 Class D hub flange, flat faced (FF), available in sizes 4″ through 96″.  

Nom Size	OD	Thickness	Overall Thickness	Dia at Base	Bore	Drilling			Weight
						Bolt Circle	Hole Dia	No. Holes
	A	T	L	E	B	C
4	9	0.5	0.875	5.312	4.57	7.5	0.75	8	7
5	10	0.562	1.25	6.312	5.66	8.5	0.875	8	9
6	11	0.562	1.25	7.562	6.72	9.5	0.875	8	11
8	13.5	0.562	1.25	9.688	8.72	11.75	0.875	8	15
10	16	0.688	1.25	12	10.88	14.25	1	12	22
12	19	0.688	1.25	14.375	12.88	17	1	12	33
14	21	0.75	1.25	15.75	14.19	18.75	1.125	12	43
16	23.5	0.75	1.25	18	16.19	21.25	1.125	16	52
18	25	0.75	1.25	19.875	18.19	22.75	1.25	16	52
20	27.5	0.75	1.25	22	20.19	25	1.25	20	61
22	29.5	1	1.75	24.25	22.19	27.25	1.375	20	92
24	32	1	1.75	26.125	24.19	29.5	1.375	20	105
26	34.25	1	1.75	28.5	26.19	31.75	1.375	24	119
28	36.5	1	1.75	30.5	28.19	34	1.375	28	130
30	38.75	1	1.75	32.5	30.19	36	1.375	28	144
32	41.75	1.125	1.75	34.75	32.19	38.5	1.625	28	182
34	43.75	1.125	1.75	36.75	34.19	40.5	1.625	32	191
36	46	1.125	1.75	38.75	36.19	42.75	1.625	32	207
38	48.75	1.125	1.75	40.75	38.19	45.25	1.625	32	237
40	50.75	1.125	1.75	43	40.19	47.25	1.625	36	249
42	53	1.25	1.75	45	42.19	49.5	1.625	36	287
44	55.25	1.25	2.25	47	44.19	51.75	1.625	40	334
46	57.25	1.25	2.25	49	46.19	53.75	1.625	40	348
48	59.5	1.375	2.5	51	48.19	56	1.625	44	407
50	61.75	1.375	2.5	53	50.19	58.25	1.875	44	421
52	64	1.375	2.5	55	52.19	60.5	1.875	44	448
54	66.25	1.375	2.5	57	54.19	62.75	1.875	44	475
60	73	1.5	2.75	63	60.19	69.25	1.875	52	605
66	80	1.5	2.75	69	66.19	76	1.875	52	718
72	86.5	1.5	2.75	75	72.19	82.5	1.875	60	803
78	93	1.75	3	81.25	78.19	89	2.125	64	1010
84	99.75	1.75	3	87.5	84.19	95.5	2.125	64	1160
90	106.5	2	3.25	93.75	90.19	102	2.438	68	1430
96	113.25	2	3.25	100	96.19	108.5	2.438	68	1618

• For sizes ≤ 84″, Bolt holes shall be drilled 1/8″ [3.2 mm] larger in diameter than the nominal diameter of bolt; For sizes > 84″, bolt holes shall be drilled 3/16″ [4.8 mm] larger in diameter than the nominal diameter of bolt.
• Hub flanges are to be used on pipe that has an OD equal to the nominal pipe size in the first column.
• Pressure rating at atmospheric temperature: sizes 4-12 in. inclusive, 175 psi; sizes larger than 12 in., 150 psi. These flanges have the same OD and drilling as ANSI/ASME B16.1 class 125 cast-iron flanges. In sizes 24in. and smaller, they also match ANSI/ASME B16.5 150-psi standard for steel flanges.

AWWA C207 Class E Hub Flange

AWWA C207 Class E hub flange, flat faced (FF), available in sizes 4″ through 96″.  

Nom Size	OD	Thickness	Overall Thickness	Dia at Base	Bore	Drilling			Weight
						Bolt Circle	Hole Dia	No. Holes
	A	T	L	E	B	C
4	9	0.938	1.312	5.312	4.57	7.5	0.75	8	13
5	10	0.938	1.438	6.438	5.66	8.5	0.875	8	14
6	11	1	1.562	7.562	6.72	9.5	0.875	8	17
8	13.5	1.125	1.75	9.688	8.72	11.75	0.875	8	28
10	16	1.188	1.938	12	10.88	14.25	1	12	37
12	19	1.25	2.188	14.375	12.88	17	1	12	59
14	21	1.375	2.25	15.75	14.19	18.75	1.125	12	78
16	23.5	1.438	2.5	18	16.19	21.25	1.125	16	101
18	25	1.562	2.688	19.875	18.19	22.75	1.25	16	110
20	27.5	1.688	2.875	22	20.19	25	1.25	20	139
22	29.5	1.812	3.125	24	22.19	27.25	1.375	20	162
24	32	1.875	3.25	26.125	24.19	29.5	1.375	20	197
26	34.25	2	3.375	28.5	26.19	31.75	1.375	24	235
28	36.5	2.062	3.438	30.75	28.19	34	1.375	28	269
30	38.75	2.125	3.5	32.75	30.19	36	1.375	28	303
32	41.75	2.25	3.625	35	32.19	38.5	1.625	28	375
34	43.75	2.312	3.688	37	34.19	40.5	1.625	32	401
36	46	2.375	3.75	39.25	36.19	42.75	1.625	32	452
38	48.75	2.375	3.75	41.75	38.19	45.25	1.625	32	528
40	50.75	2.5	3.875	43.75	40.19	47.25	1.625	36	573
42	53	2.625	4	46	42.19	49.5	1.625	36	648
44	55.25	2.625	4	48	44.19	51.75	1.625	40	688
46	57.25	2.688	4.062	50	46.19	53.75	1.625	40	733
48	59.5	2.75	4.125	52.25	48.19	56	1.625	44	799
50	61.75	2.75	4.125	54.25	50.19	58.25	1.875	44	827
52	64	2.875	4.25	56.5	52.19	60.5	1.875	44	922
54	66.25	3	4.375	58.75	54.19	62.75	1.875	44	1024
60	73	3.125	4.5	65.25	60.19	69.25	1.875	52	1253
66	80	3.375	4.875	71.5	66.19	76	1.875	52	1623
72	86.5	3.5	5	78.5	72.19	82.5	1.875	60	1922
78	93	3.875	5.375	84.5	78.19	89	2.125	64	2279
84	99.75	3.875	5.375	90.5	84.19	95.5	2.125	64	2586
90	106.5	4.25	5.75	96.75	90.19	102	2.438	68	3061
96	113.25	4.25	5.75	102.75	96.19	108.5	2.438	68	3432

• For sizes ≤ 84″, Bolt holes shall be drilled 1/8″ [3.2 mm] larger in diameter than the nominal diameter of bolt; For sizes > 84″, bolt holes shall be drilled 3/16″ [4.8 mm] larger in diameter than the nominal diameter of bolt.
• Hub flanges are to be used on pipe that has an OD equal to the nominal pipe size in the first column.
• Pressure rating at atmospheric temperature is 275 psi. These flanges have the same OD and drilling as ANSI/ASME B16.1 class 125 cast-iron flanges. In sizes 24in. and smaller, they also match ANSI/ASME B16.5 class 150 standard for steel flanges. The thickness of a class 150 flange from which the raised face has been removed shall be no less than dimension T minus 0.06 in.

Dimensional tolerances for AWWA Standard flanges

These tolerances are a part of ANSI B16.5 and AWWA C207-01 Sec. 4.2 except where noted otherwise. Listed below are the Dimensional Tolerances to which flanges are manufactured. The limits given are maximum. Rigid inspection procedure assures the maintenance of high standards of accuracy in regular day to day production.

Ring type Slip-on and Blind flanges			HUB type slip-on
O.D.	<=24″	+/- 0.6″(1.6mm)	O.D.	<=24″	+/- 0.6″(1.6mm)
	>24″	+/- .12″(3.2mm)		>24″	+/- .12″(3.2mm)
I.D.	Socket-Welding	10″ and Samller	I.D.	10″ and Samller	+.03″(0.8mm)
		+.03″(0.8mm),-0″
	Slip-on and	12″ and Larger		12″-18″	+/-.06″(1.6mm)
	Lap Joint	+.06″(1.6mm),-0″		20″-42″	+.12″(3.2mm)
					+.06″(1.6mm)
O.D. of Hub	<=12″	+.09″(2.4mm),	Diameter of	0.06″ Raised Face	+/-.03″(0.8mm)
		-.06″(1.6mm)	Contact Face
	14″-42″	+/-.12″(3.2mm)
Diameter of Contact face	0.06″ Raised Face	+/- .03″(0.8mm)	Diameter of Hub at base	X<=24″	+/-.06″(1.6mm)
				X>24″	+/-.12″(3.2mm)
Deameter of Contact face	<=10″	+.03″(0.8mm),	Diameter of Hub at point of Welding	<=5″	+.09″(2.4mm),
		-0″			-.03″(0.8mm)
	12″-42″	+.06″(1.6mm),		>=6″	+.16″(4.0mm),
		-0″			-.03″(0.8mm)
Drilling	Bolt Circle	1/2“-24”	Drilling	Bolt Circle	1/2“-24”
		/26″-42″			/26″-42″
		+/-.06″(1.6mm)			+/-.06″(1.6mm)
		+/-.06″			+/-.06″
	Bolt hole	+/-.03″(0.8mm)		Bolt hole	+/-.03″(0.8mm)
	spacing			spacing
	Eccentricity of Bolt circle with respect to bore	.03″ Max.		Eccentricity of Bolt circle with respect to bore	.03″ Max.
		(0.8mm)			(0.8mm)
Thickness	18″& Small	+.12″(3.2mm),-0″	Thickness	18″& Small	+.12″(3.2mm),-0″
	20″-42″	+.19″(1.6mm)		20″-42″	+.19″(1.6mm)
Length Thru Hub	<=10″	+/-.06″(1.6mm)	Length Thru Hub	<=10″	+/-.06″(1.6mm)
	12″-42″	+/1.12″(3.2mm)		12″-42″	+/1.12″(3.2mm)

Manufacturing process of Flanges

Flanges are usually made of carbon steel, stainless steel or special steel. The manufacturing process of flanges usually includes the following steps: First, raw materials are cut to a certain size and heated to high temperature in the furnace. This helps soften the material, making it easier to form. Next, the heated material is placed in the mold and pressed or crushed into the desired shape. This forming process is called forging. Flange blanks usually need heat treatment after forging to improve their mechanical properties and corrosion resistance. Common heat treatment methods include annealing, tempering and quenching. Annealing is to maintain the flange blank at a certain temperature for a period of time to eliminate the internal residual stress and improve the plasticity and toughness of the material. The flange blank after annealing has higher mechanical properties and lower brittleness, but it also reduces the hardness of the material. Tempering is to reheat the flange blank to a certain temperature after annealing to restore the internal grain structure of the material to the original state and improve the hardness and strength of the material. The flange blank after tempering has higher mechanical properties and lower plasticity. Quenching is to reheat the flange blank to a certain temperature after annealing and tempering, so that the grain structure inside the material can form smaller crystals, and improve the hardness and strength of the material. The quenched flange blanks have higher mechanical properties and lower plasticity and toughness. Annealing, tempering and quenching are three common methods of heat treatment, and appropriate heat treatment methods can be selected according to the performance requirements of flange blanks. After heat treatment of flange blanks, check the defects, and then machine them to achieve the precise dimensions and tolerances specified in the design. This may involve drilling bolt holes and machining the surface to obtain a smooth surface. After the flange is processed, additional finishing processes, such as heat treatment or electroplating, can be carried out to improve its strength and durability. Finally, the flange is checked for the last time to ensure that it meets all quality standards, and then it is packaged and shipped to the customer. In general, the flange manufacturing process may be very complex, requiring specialized equipment and skilled workers to produce high-quality products.

Marking of AWWA C207 Flanges

Flanges are marked with several important information to determine their specifications and suitability for different applications. This marking usually includes:

• Flange type: indicates the type of flange, such as welding neck, sliding sleeve or thread.
• Material grade: The material grade of flange indicates the type of material used, such as carbon steel or stainless steel.
• Pressure rating: This indicates the maximum pressure that the flange can withstand, usually measured in pounds per square inch (PSI).
• Dimensions: Flange dimensions are usually expressed in inches or millimeters and may include nominal dimensions and bolt circle diameters.
• Flange grade: flange grade indicates the accuracy grade of flange manufacturing and dimensional tolerance. The higher the grade is, the higher the quality is.
• Manufacturer’s name or logo: used to identify the company manufacturing the flange.
• Heat number or serial number: This is the unique identification number assigned to the flange during manufacturing.
• Country of Origin: refers to the manufacturing place of the flange.
• Any other certification or standard to which flanges conform, such as AWWA C207.

For example: YAANG AWWA C207-07 ASTM A182 UNS S31603 Class F-Ring Flange 48″ Pressure Rating 300 psi

Packing of AWWA C207 Flanges

AWWA C207 flanges are typically packaged in wooden crates or boxes to ensure protection during shipping. The flanges are carefully placed inside the crate and additional cushioning material, such as foam or bubble wrap, may be used to prevent damage. The crate is then sealed and labeled for easy identification and handling.

Inspection and measurement of AWWA C207 flanges

AWWA C207 flanges are flanges designed and manufactured by American Water Works Association (AWWA) Standard C207. This standard specifies the dimensions, materials, and other requirements for flanges used in water systems. To ensure that AWWA C207 flanges meet the requirements of the standard, they must be inspected and measured using appropriate methods and tools. Some key aspects of the AWWA C207 flange inspection and measurement process include:

• Dimensional Inspection: This involves verifying that the flange has the correct dimensions and tolerances as specified in the standard. This can be done using a variety of measuring tools such as calipers, micrometers, and through/stop gauges.
• Material Inspection: This involves verifying that the flange is made of the correct material as specified in the standard. This can be accomplished by a variety of methods such as visual inspection, hardness testing, and chemical analysis.
• Pressure testing: This involves hydrostatic pressure testing of the flange to ensure that it can withstand the specified maximum pressure without leaking or failing. This can be done using specialized pressure testing equipment or other equipment.
• Visual inspection: This involves visually inspecting the flange for any defects, such as cracks, scratches, or other surface defects. This can be accomplished with the naked eye or with the aid of a magnifying glass or other visual aid.

The inspection and measurement of AWWA C207 flanges is an important step in ensuring that they meet the requirements of the standard and are used safely and reliably in the water system. It is usually performed by trained and experienced professionals who are familiar with the standard requirements as well as the appropriate inspection and measurement methods and tools.

Application of AWWA C207 flange

Some common applications for AWWA C207 flanges include:

• AWWA C207 flanges are commonly used in water treatment and distribution systems such as water lines, pumps, valves and other water treatment equipment. These flanges are designed to provide a safe, leak-free connection between two pipes or between a pipe and a piece of equipment.
• A common application for AWWA C207 flanges is in water treatment plants, where they are used to connect pipes and equipment in the treatment process. For example, they can be used to connect raw water intake pipes to treatment tanks or to connect treated water output pipes to the distribution network.
• Another common application for AWWA C207 flanges is in water distribution systems, such as in municipal water mains or industrial water systems. These flanges are used to connect the pipes that carry treated water from the treatment plant to the end user, ensuring a safe and leak-free connection.
• AWWA C207 flanges are also commonly used in the construction and repair of water mains for connecting pipe sections and connecting pipes to other water treatment equipment, such as pumps, valves and meters. Durable and reliable, these flanges are ideal for use in demanding environments where water quality and flow rates are critical.

How to purchase the correct AWWA C207 flanges?

Determine the size and type of flange required. Measure the pipe diameter and refer to AWWA C207 standards to determine the appropriate flange size and type. Select the appropriate material for the flange AWWA C207 flanges available in a variety of materials, including ductile iron, carbon steel, and stainless steel. Select the material that is best suited for the specific application and environment. Consider the pressure rating and bolt-hole pattern of the flange. the AWWA C207 standard specifies different pressure ratings for different flange sizes and materials. Select a flange with the appropriate pressure rating for the intended application. Also, make sure the bolt-hole pattern on the flange matches the bolt-hole pattern on the piping system. Consider any additional features or options. Some AWWA C207 flanges are available with additional features, such as corrosion resistance or insulation, to meet specific needs. Determine if the application requires these features. Purchase flanges from a reputable supplier. Research and compare different suppliers to find a reputable and trustworthy source of flanges. Consider factors such as price, availability, and customer service when making your decision.

How to select AWWA C207 flanges manufacturer?

Research the different manufacturers that produce AWWA C207 flanges. This can be done by searching online, seeking advice from industry professionals, or contacting the American Water Works Association (AWWA) for a list of approved manufacturers. Consider the manufacturer’s reputation and experience in producing AWWA C207 flanges. Check their website and read customer reviews to learn about their quality and reliability. Evaluate the manufacturer’s production capabilities and capacity to meet your specific needs. Determine if they can produce the flange size, type and quantity you need, and if they have the necessary equipment and facilities to meet your deadlines. Consider the manufacturer’s certifications and compliance with relevant standards and regulations. Check that they are AWWA certified and that they meet the required standards for materials, welding and testing. Compare the pricing and delivery options offered by different manufacturers. Determine which manufacturer offers the most affordable product and can meet your delivery requirements. Contact the manufacturer and ask any additional questions or concerns you may have. Discuss your specific needs and requirements with the manufacturer to ensure that they can provide a flange that meets your requirements. This may include the size and type of flange you need, the materials that should be used, and any other special requirements. Request samples and have them tested to ensure they meet your quality standards and specifications.