Threaded Flange

THREADED FLANGES are confined to special applications. Their chief merit lies in the fact that they can be assembled without welding this explains their use in extremely high pressure services, particularly at or near atmospheric temperature, where alloy steel is essential for strength and where the necessary post weld heat treatment is impractical. Threaded flanges are unsuited for conditions involving temperature or bending stresses of any magnitude, particularly under cyclic conditions, where leakage through the threads may occur in relatively few cycles of heating or stress; sea welding is sometimes employed to overcome this, but cannot be considered as entirely satisfactory.
 
 
Specification: 
Manufacturing standards: ANSI B 16.5, BS 1560. BS 10, IS 6392, B-2.1 NPT, API, DIN, JIS. MSS SP 44
Stainless Steel: ASTM A182 F304/ 304L/ 304H/ 316/ 316L/ 317/ 317L/ 321/ 310/ 347/ 904Letc.

Duplex Stainless Steel: UNS S31803, 2205 
Carbon Steel: ASTM A105/ A694 F42/ 46/52/56/60/65/70/A350 LF3/A350 LF2, etc.
Alloy Steel: ASTM A 182, GR F1, F11, F22, F5, F9, F91 
Size: 1/8" NB to 48"NB 
Class: 150, 300, 400, 600, 900, 1500 & 2500
The surface forms: according to customer requirements

 

密封面型式 公称压力PN/MPa
(bar)
 0.6
(6)
 1.0
(10)
1.6
(16) 
2.5
(25)
4.0
(40)
突面(RF)   DN10-50

 

 

密封面型式 公称压力PN (MPa)
(Class)
2.0
Class 150
5.0
Class 300
11.0
Class 600
15.0
Class 900
突面(RF) DN15-150
(1/2"-6")
DN15-600
(1/2"-24")