Threaded Flanges are used for special circumstances with their main advantage being that they can be attached to the pipe without welding. Sometimes a seal weld is also used in conjunction with the threaded connection. This special type of flange is generally used for high pressure piping system, yet smaller diameter applications. This obviously limits its application to relatively low pressure piping systems. Threaded Flanges may be welded around the joint after assembly, but this is not considered a satisfactory method of increasing the flanges’ pressure applications. Threaded flange use in low press condition usually.
Standards:ANSI B16.5,ANSI B 16.47 SERIES a&b,MSS SP44,ASA,API-605,AWWA
class150,class300,class400,class600,class900,class1500,class2500 | PN6pn10,PN25,PN40,PN64 ect.
Carbon Steel Threaded flange:
ASTM SA/A105(N),C22.8,ST37.2,A516 GR60/70,ASTM SA350 LF2,ASTM SA694 F42/46/52/56/60/65…
Stainless Steel Threaded flange:
ASTM A182 F304/304L/316/316L…
Duplex Stainless Steel: ASTM A182 F51/F53/F55/F60…
Alloy Steel Threaded flange:
ASTM A182 F1/F5/F9/F11/F22/F91…
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