Selection of flanges in pipeline-American system
What to consider when selecting pipe flanges?
You need to make a selection based on your individual purpose and requirement.Read this article to know some important facts about pipe flanges,so that you can take an informed decision when selecting them in American system.
American standard slip on flanges finished in Haihao Group
The occasions for slip on flange applicable(SO):
SO flange is suitable for public works and non-inflammable non-explosive media.The sealing requirements are not high. The working temperature is -45~+200°C.Commonly the sealing surface type is RF,the usual pressure is 150LB 300LB.
American standard threaded flange finished in Haihao Group
The occasions for threaded flange applicable(TH):
Threaded flanges are suitable for public works,instruments that their diameters less than or equal to DN150 (6″) and it is customary to use tapered pipe thread connections.
Generally it is NPT thread, this type is quick and easy to fix,its use is generally in low pressure situations,the common pressure is 150LB,and the sealing surface type is RF surface.
American standard socket weld flanges finished in Haihao Group
The occasions for socket weld flange applicable(SW):
SW flanges are used when the nominal diameter is less than the DN50 (2″) and non-severe cycle,this type is used for small size,which reduces the trouble of small size pipe butt welding,commonly the pressure is 150LB 300LB 600LB 900LB,and sealing surface type is RF.
American standard weld neck flanges finished in Haihao Group
The occasions for weld neck flange applicable(WN):
This type of flange is the most widely used,the pressure range is from 150LB to 2500LB,and the sealing surface types are RF,M,FM,T,G,RTJ.It is suitable for a variety of occasions,special sealing surfaces are used in high temperature and high pressure,flammable,explosive,toxic and harmful media.