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AS 4087 PN21 Flange
AS 4087 flange PN21
Standard: AS 4087
Flange type: blind flange,slip on flange
Size range: 2"-48"
Pressure: Forged and CNC machined
Material: Stainless steel , Alloy Steel , Carbon Steel,Copper&Nickel Alloy,Nickel Alloy,etc.
Standard: AS 4087
Flange type: blind flange,slip on flange
Size range: 2"-48"
Process: Forged and CNC machined
Connection type:Ring type joint, Raised face, flat face
Specialize: As per drawing
Material:
Stainless Steel Material:
ASTM A182 F304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L
Duplex stainless steel UNS S32304,S31803,S32205.
Super Duplex stainless steel UNS S32750/S32760/S31254/S31260/S32550/S32707
Carbon Steel Material:
ASTM A105, A350 LF2,P235GH,P250GH,Q235,Q345,C22.8,20#,16mn.
Alloy Steel Material:
ASTM A 182, GR F1,F5, F9, F11, F22, F91
ASTM A694 F42/F46/F52/F60/F65/F70/F80.
Copper&Nickel Alloy Material:
CU/NI 90/10, CU/NI 70/30
Nickel Alloy Material:
Monel 400 & 500, Inconel 600 & 625, Incolloy 800, 825, Hastelloy C22,C276
Surface treatment: Anti-rust oil, transparent/yellow/black,Anti-rust paint, Zinc,Hot dipped galvanized
Usage: Oil field, Offshore, Water system, Shipbuilding, Natural gas,Electric power, Pipe projects,etc.
Standard: AS 4087
Flange type: blind flange,slip on flange
Size range: 2"-48"
Process: Forged and CNC machined
Material : Stainless steel , Alloy Steel , Carbon Steel,Copper&Nickel Alloy,Nickel Alloy,etc. 
| AS 4087:2004 PN 21 | ||||||
| PN21 | FLANGE THICKNESS | DRILLING DATA | ||||
| NOMINAL | FLANGE | THICKNESS | PITCH | BOLT | NUMBER | |
| PIPE SIZE | OUTSIDE | OF | CIRCLE | HOLE | OF | |
| DIAMETER | FLANGE | DIAMETER | DIAMETER | BOLT | ||
| HOLES | ||||||
| MM | INCH | OD | T | PCD | H | # |
| 50 | 2 | 165 | 15 | 127 | 18 | 4 |
| 65 | 2 1/2 | 185 | 15 | 146 | 18 | 8 |
| 80 | 3 | 205 | 15 | 165 | 18 | 8 |
| 100 | 4 | 230 | 19 | 191 | 18 | 8 |
| 150 | 6 | 305 | 24 | 260 | 22 | 12 |
| 200 | 8 | 370 | 24 | 324 | 22 | 12 |
| 225 | 9 | 405 | 30 | 356 | 26 | 12 |
| 250 | 10 | 430 | 30 | 381 | 26 | 12 |
| 300 | 12 | 490 | 30 | 438 | 26 | 16 |
| 350 | 14 | 550 | 30 | 495 | 30 | 16 |
| 375 | 15 | 580 | 38 | 521 | 30 | 16 |
| 400 | 16 | 610 | 38 | 552 | 30 | 20 |
| 450 | 18 | 675 | 38 | 610 | 33 | 20 |
| 500 | 20 | 735 | 48 | 673 | 33 | 24 |
| 600 | 24 | 850 | 58 | 781 | 36 | 24 |
| 700 | 28 | 935 | 58 | 857 | 36 | 24 |
| 750 | 30 | 1015 | 58 | 940 | 36 | 28 |
| 800 | 32 | 1060 | 68 | 984 | 36 | 28 |
| 900 | 36 | 1185 | 68 | 1105 | 39 | 32 |
| 1000 | 40 | 1275 | 78 | 1194 | 39 | 36 |
| 1200 | 48 | 1530 | 88 | 1441 | 42 | 40 |
