With neck butt weld flange (WN)


1. Sealing surface form: 
plane (FF), protruding surface (RF), concave and convex surface (MFM), grooved surface (TG), ring joint surface (RJ) 
With neck butt weld flange (WN)
2. Flange material:
Carbon Steel: ASTM A105, 20#, Q235, 16Mn, ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70; 
Stainless Steel (Stainess Steel): ASTM A182 F304, 304L, F316, 316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8; 
Alloy Steel: ASTM A182 F1, F5a, F9, F11, F12, F22, F91, A182F12, A182F11, 16MnR, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, St45.8/III; 
3. Flange standard:
 ANSI B16.5, HG20617-1997, GB/T9115.1-2000-GB/T9115.4-200, DIN2630-2638, HG20595 -1997, GB/T9115.1-2000, GB/T9115.4-2000
European system steel pipe flange application range
Sealing surface type Nominal pressure PN/MPa (bar)
0.25 
(2.5)		 0.6 
(6)		 1.0 
(10)		 1.6 
(16)		 2.5 
(25)		 4.0 
(40)		 6.3 
(63)		 10.0 
(100)		 16.0 
(160)		 25.0 
(250)
Facet (RF) DN10-300 DN10-2000 DN10-1000 DN10-600 DN10-400 DN10-300 DN10-250
Concave surface (MFM) - DN10-600 DN10-400 DN10-300 -
Grooved surface (TG) - DN10-600 DN10-400 DN10-300 -
Plane (FF) DN10-3000 DN10-2000 -
Ring connection surface (RJ) - DN15-400 DN15-300 DN15-250
American system steel pipe flange application range
Sealing surface type Nominal pressure PN/MPa (Class)
2.0 
(150LB)		 5.0 
(300LB)		 11.0 
(600LB)		 15.0 
(900LB)		 26.0 
(1500LB)		 42.0 
(2500LB)  
Facet (RF) DN15-600 
(1/2"-24")		 DN15-300 
(1/2"-12")
Concave surface (MFM) - DN15-600 
(1/2"-24")		 DN15-65 
(1/2"-2.1/2")		 DN15-300 
(1/2"-12")
Grooved surface (TG) - DN15-600 
(1/2"-24")		 DN15-65 
(1/2"-2.1/2")		 DN15-300 
(1/2"-12")
Plane (FF) DN15-600 
(1/2"-24")		 -
Ring connection surface (RJ) DN25-600 
(1/2"-24")		 DN15-600 
(1/2"-24")		 DN15-300 
(1/2"-12")

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