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.
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