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Specification of Forged Steel Flanges
Forged steel flange is a disc-shaped piece of equipment used to connect a pipe to fittings or valve or other component to form a pipework system. Usually flange has been attached to pipe or tube end to, and then a gasket is inserted in the middle to form a seal. Finally they are joined together with bolts and nuts.
Size Range | 1/2"- 3" / DN15 - DN80 |
Pressure Rating | Class 150, 300, 600, 1500 |
Standard | ANSI / ASME B16.5 |
Carbon Steel | ASTM A105 / A105N |
Low Temp Carbon Steel | ASTM A350 LF2 / LF3 |
Pipeline Steel | ASTM A694 F42 / 46 / 56 / 60 / 65 |
Alloy Steel | ASTM A182 F11 / 12 / 22 / 5 / 9 / 91 / 92 |
Stainless Steel | ASTM A182 F304 / 304L / 304H, 316 / 316L, 310S, 317, 347, 904L |
Duplex Stainless Steel | ASTM A182 F51, F53, F44 |
You can see in the upon chart, alloy steel grade used for forged steel flanges, mainly include ASTM A182 F11/12/22/5/9/91/92, their chemical element content are different makes them have different physical and mechanical properties. When we choose a kind of alloy steel to produce the socket weld flange, we will have a alloy steel socket weld flange.
Different Chemical Elements and their effect in the metal
Alloy steel socket weld flange will be used in the high pressure and resistant to corrosion environment because the alloy steel material has below elements.
(1)Chromium – Adds hardness.
(2)Cobalt –Improve hot Hardness (or red Hardness).
(3)Manganese – Increases surface hardness
(4)Molybdenum – Increases strength.
(5)Nickel – Increases strength & toughness and resistance.
(6)Tungsten – Adds hardness and improves grain structure.
(7)Vanadium – Improved corrosion resistance.
(8)Chromium-Vanadium – Greatly improved tensile strength.
Chemical Composition
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Ni | Cr | Mo |
| ASTM A182 F5 | MIN | 0.30 | 4.00 | 0.44 | |||||
| MAX | 0.15 | 0.60 | 0.030 | 0.030 | 0.50 | 0.50 | 6.00 | 0.65 | |
| ASTM A182 F9 | MIN | 0.30 | 0.50 | 8.00 | 0.90 | ||||
| MAX | 0.15 | 0.60 | 0.030 | 0.030 | 1.00 | 10.00 | 1.10 | ||
| ASTM A182 F12 CL1 | MIN | 0.05 | 0.30 | 0.80 | 0.44 | ||||
| MAX | 0.15 | 0.60 | 0.45 | 0.45 | 0.50 | 1.25 | 0.65 | ||
| ASTM A182 F12 CL2 | MIN | 0.10 | 0.30 | 0.10 | 0.80 | 0.44 | |||
| MAX | 0.20 | 0.80 | 0.40 | 0.40 | 0.60 | 1.25 | 0.65 | ||
| ASTM A182 F11 CL1 | MIN | 0.05 | 0.30 | 0.50 | 1.00 | 0.44 | |||
| MAX | 0.15 | 0.60 | 0.03 | 0.03 | 1.00 | 1.50 | 0.65 | ||
| ASTM A182 F11 CL2 | MIN | 0.10 | 0.30 | 0.50 | 1.00 | 0.44 | |||
| MAX | 0.20 | 0.80 | 0.04 | 0.04 | 1.00 | 1.50 | 0.65 | ||
| ASTM A182 F11 CL3 | MIN | 0.05 | 0.30 | 0.50 | 1.00 | 0.44 | |||
| MAX | 0.15 | 0.60 | 0.03 | 0.03 | 1.00 | 1.50 | 0.65 |
Mechanical Properties
| MATERIAL | ASTM A182 F5 | ASTM A182 F9 | ASTM A182 F12 CL1 | ASTM A182 F12 CL2 | ASTM A182 F11 CL1 | ASTM A182 F11 CL2 | ASTM A182 F11 CL3 |
| T.S (MPA) | 485 min | 585 min | 415 min | 485 min | 415 min | 485 min | 515 min |
| Y.S (MPA) | 275 min | 380 min | 220 min | 275 min | 205 min | 275 min | 310 min |
| EL % | 20 min | 20 min | 20 min | 20 min | 20 min | 20 min | 20 min |
| R/A % | 35 min | 40 min | 45 min | 30 min | 45 min | 30 min | 30 min |
| HARDNESS | 143-217 | 179-217 | 121-174 | 143-207 | 121-174 | 143-207 | 150-207 |
Dimensions and Weight of CL600 Socket Weld Flange
| A | B | C | D | E | K | F | G | H | I | J | W |
inch | inch | inch | inch | inch | inch | inch | inch | No. of Holes | inch | inch | kg/pc | |
mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | |||
1/2 | 3.75 | 0.56 | 0.88 | 0.88 | 0.38 | 1.5 | 1.38 | 4 | 0.62 | 2.62 | 0.76 | |
95.2 | 0.56 | 0.88 | 0.88 | 0.38 | 1.5 | 1.38 | 15.7 | 66.55 | ||||
| 4.62 | 0.62 | 1.0 | 1.09 | 0.44 | 1.88 | 1.69 | 4 | 0.75 | 3.25 | 1.29 | |
117.3 | 15.7 | 25.4 | 27.7 | 11.1 | 47.7 | 42.9 | 0.75 | 3.25 | ||||
1 | 4.88 | 0.69 | 1.06 | 1.36 | 0.5 | 2.12 | 2 | 4 | 0.75 | 3.5 | 1.55 | |
123.9 | 17.5 | 26.9 | 34.5 | 12.7 | 53.8 | 50.8 | 0.75 | 3.5 | ||||
1-1/4 | 5.25 | 0.81 | 1.12 | 1.7 | 0.56 | 2.5 | 2.5 | 4 | 0.75 | 3.88 | 2.06 | |
133.3 | 20.6 | 28.4 | 43.2 | 14.2 | 63.5 | 63.5 | 19.1 | 98.6 | ||||
1-1-/2 | 6.12 | 0.88 | 1.25 | 1.95 | 0.62 | 2.75 | 2.88 | 4 | 0.88 | 4.5 | 3 | |
155.4 | 22.3 | 31.75 | 49.5 | 157 | 69.85 | 73.15 | 22.3 | 114.3 | ||||
2 | 6.5 | 1 | 1.44 | 2.44 | 0.69 | 3.31 | 3.62 | 8 | 0.75 | 5.0 | 3.67 | |
165.1 | 25.4 | 36.6 | 62 | 17.5 | 84 | 91.9 | 19.1 | 127 | ||||
2-1/2 | 7.5 | 1.12 | 1.62 | 2.94 | 0.75 | 3.94 | 4.12 | 8 | 0.88 | 5.88 | 5.35 | |
190.5 | 28.4 | 41.1 | 74.7 | 19 | 100 | 104.6 | 22.3 | 149.3 | ||||
3 | 8.25 | 1.25 | 1.81 | 3.57 | 0.81 | 4.62 | 5 | 8 | 0.88 | 6.62 | 7.06 | |
209.5 | 31.75 | 46 | 90.7 | 20.6 | 117.3 | 127 | 22.3 | 168.1 |
Manufacturing standard of Alloy Steel Socket Weld Flange
ASME B16.5 designed by American Society of Mechanical Engineers ,is the most commonly used specification for forged steel pipe flange. This standard covers pressure temperature ratings, materials, dimensions, tolerances, marking, testing and methods of designating openings for all pipe flanges and flanged fittings including alloy steel socket weld flanges.
Specification of Forged Steel Flanges
Forged steel flange is a disc-shaped piece of equipment used to connect a pipe to fittings or valve or other component to form a pipework system. Usually flange has been attached to pipe or tube end to, and then a gasket is inserted in the middle to form a seal. Finally they are joined together with bolts and nuts.
Size Range | 1/2"- 3" / DN15 - DN80 |
Pressure Rating | Class 150, 300, 600, 1500 |
Standard | ANSI / ASME B16.5 |
Carbon Steel | ASTM A105 / A105N |
Low Temp Carbon Steel | ASTM A350 LF2 / LF3 |
Pipeline Steel | ASTM A694 F42 / 46 / 56 / 60 / 65 |
Alloy Steel | ASTM A182 F11 / 12 / 22 / 5 / 9 / 91 / 92 |
Stainless Steel | ASTM A182 F304 / 304L / 304H, 316 / 316L, 310S, 317, 347, 904L |
Duplex Stainless Steel | ASTM A182 F51, F53, F44 |
You can see in the upon chart, alloy steel grade used for forged steel flanges, mainly include ASTM A182 F11/12/22/5/9/91/92, their chemical element content are different makes them have different physical and mechanical properties. When we choose a kind of alloy steel to produce the socket weld flange, we will have a alloy steel socket weld flange.
Different Chemical Elements and their effect in the metal
Alloy steel socket weld flange will be used in the high pressure and resistant to corrosion environment because the alloy steel material has below elements.
(1)Chromium – Adds hardness.
(2)Cobalt –Improve hot Hardness (or red Hardness).
(3)Manganese – Increases surface hardness
(4)Molybdenum – Increases strength.
(5)Nickel – Increases strength & toughness and resistance.
(6)Tungsten – Adds hardness and improves grain structure.
(7)Vanadium – Improved corrosion resistance.
(8)Chromium-Vanadium – Greatly improved tensile strength.
Chemical Composition
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Ni | Cr | Mo |
| ASTM A182 F5 | MIN | 0.30 | 4.00 | 0.44 | |||||
| MAX | 0.15 | 0.60 | 0.030 | 0.030 | 0.50 | 0.50 | 6.00 | 0.65 | |
| ASTM A182 F9 | MIN | 0.30 | 0.50 | 8.00 | 0.90 | ||||
| MAX | 0.15 | 0.60 | 0.030 | 0.030 | 1.00 | 10.00 | 1.10 | ||
| ASTM A182 F12 CL1 | MIN | 0.05 | 0.30 | 0.80 | 0.44 | ||||
| MAX | 0.15 | 0.60 | 0.45 | 0.45 | 0.50 | 1.25 | 0.65 | ||
| ASTM A182 F12 CL2 | MIN | 0.10 | 0.30 | 0.10 | 0.80 | 0.44 | |||
| MAX | 0.20 | 0.80 | 0.40 | 0.40 | 0.60 | 1.25 | 0.65 | ||
| ASTM A182 F11 CL1 | MIN | 0.05 | 0.30 | 0.50 | 1.00 | 0.44 | |||
| MAX | 0.15 | 0.60 | 0.03 | 0.03 | 1.00 | 1.50 | 0.65 | ||
| ASTM A182 F11 CL2 | MIN | 0.10 | 0.30 | 0.50 | 1.00 | 0.44 | |||
| MAX | 0.20 | 0.80 | 0.04 | 0.04 | 1.00 | 1.50 | 0.65 | ||
| ASTM A182 F11 CL3 | MIN | 0.05 | 0.30 | 0.50 | 1.00 | 0.44 | |||
| MAX | 0.15 | 0.60 | 0.03 | 0.03 | 1.00 | 1.50 | 0.65 |
Mechanical Properties
| MATERIAL | ASTM A182 F5 | ASTM A182 F9 | ASTM A182 F12 CL1 | ASTM A182 F12 CL2 | ASTM A182 F11 CL1 | ASTM A182 F11 CL2 | ASTM A182 F11 CL3 |
| T.S (MPA) | 485 min | 585 min | 415 min | 485 min | 415 min | 485 min | 515 min |
| Y.S (MPA) | 275 min | 380 min | 220 min | 275 min | 205 min | 275 min | 310 min |
| EL % | 20 min | 20 min | 20 min | 20 min | 20 min | 20 min | 20 min |
| R/A % | 35 min | 40 min | 45 min | 30 min | 45 min | 30 min | 30 min |
| HARDNESS | 143-217 | 179-217 | 121-174 | 143-207 | 121-174 | 143-207 | 150-207 |
Dimensions and Weight of CL600 Socket Weld Flange
| A | B | C | D | E | K | F | G | H | I | J | W |
inch | inch | inch | inch | inch | inch | inch | inch | No. of Holes | inch | inch | kg/pc | |
mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | |||
1/2 | 3.75 | 0.56 | 0.88 | 0.88 | 0.38 | 1.5 | 1.38 | 4 | 0.62 | 2.62 | 0.76 | |
95.2 | 0.56 | 0.88 | 0.88 | 0.38 | 1.5 | 1.38 | 15.7 | 66.55 | ||||
| 4.62 | 0.62 | 1.0 | 1.09 | 0.44 | 1.88 | 1.69 | 4 | 0.75 | 3.25 | 1.29 | |
117.3 | 15.7 | 25.4 | 27.7 | 11.1 | 47.7 | 42.9 | 0.75 | 3.25 | ||||
1 | 4.88 | 0.69 | 1.06 | 1.36 | 0.5 | 2.12 | 2 | 4 | 0.75 | 3.5 | 1.55 | |
123.9 | 17.5 | 26.9 | 34.5 | 12.7 | 53.8 | 50.8 | 0.75 | 3.5 | ||||
1-1/4 | 5.25 | 0.81 | 1.12 | 1.7 | 0.56 | 2.5 | 2.5 | 4 | 0.75 | 3.88 | 2.06 | |
133.3 | 20.6 | 28.4 | 43.2 | 14.2 | 63.5 | 63.5 | 19.1 | 98.6 | ||||
1-1-/2 | 6.12 | 0.88 | 1.25 | 1.95 | 0.62 | 2.75 | 2.88 | 4 | 0.88 | 4.5 | 3 | |
155.4 | 22.3 | 31.75 | 49.5 | 157 | 69.85 | 73.15 | 22.3 | 114.3 | ||||
2 | 6.5 | 1 | 1.44 | 2.44 | 0.69 | 3.31 | 3.62 | 8 | 0.75 | 5.0 | 3.67 | |
165.1 | 25.4 | 36.6 | 62 | 17.5 | 84 | 91.9 | 19.1 | 127 | ||||
2-1/2 | 7.5 | 1.12 | 1.62 | 2.94 | 0.75 | 3.94 | 4.12 | 8 | 0.88 | 5.88 | 5.35 | |
190.5 | 28.4 | 41.1 | 74.7 | 19 | 100 | 104.6 | 22.3 | 149.3 | ||||
3 | 8.25 | 1.25 | 1.81 | 3.57 | 0.81 | 4.62 | 5 | 8 | 0.88 | 6.62 | 7.06 | |
209.5 | 31.75 | 46 | 90.7 | 20.6 | 117.3 | 127 | 22.3 | 168.1 |
Manufacturing standard of Alloy Steel Socket Weld Flange
ASME B16.5 designed by American Society of Mechanical Engineers ,is the most commonly used specification for forged steel pipe flange. This standard covers pressure temperature ratings, materials, dimensions, tolerances, marking, testing and methods of designating openings for all pipe flanges and flanged fittings including alloy steel socket weld flanges.
NPS