The classification of the flange

材质




#


A


QA


CrMoV




MnR


CrMo


-










L





L





seal face form



plane ( FF）


tu surface ( RF)


convex ( M）


concave ( F)




concave and convex surface ( MF)


groove ( T）


groove surface ( G）


the grooved surface ( TG）




RTJ ( RJ）







according to the national standard is divided into




integral flange


threaded flange


butt welding flange


with flat welding neck flange




with socket welding neck flange


butt band neck loose flange


plate flat welding flange


butt welding ring plate loose flange




flat ring plate loose flange


flange ring plate loose flange

flange cover






according to the chemical industry standards are divided into




integral flange ( 如果)


threaded flange ( Th)


plate flat welding flange ( PL）


with diameter welded flange ( WN）




with flat welding neck flange, SO）


socket welding flange ( SW)


butt welding ring loose flange ( PJ/SE）


flat ring loose flange ( PJ/RJ）




lining flange cover ( 提单( S） ）


flange cover ( 提单)







by petrochemical industry standard is divided into




threaded flange ( PT)


butt welding flange ( WN）


flat welding flange ( SO）


socket welding flange ( SW)




loose flange ( LJ）


flange cover ( Don't watch)







by machinery industry standard is divided into




integral flange


butt welding flange


plate flat welding flange


butt welding ring plate loose flange




flat ring plate loose flange


flange ring plate loose flange


flange cover