20# carbon steel elbow refers to the base metal has 20# seamless steel pipe manufacturing elbow, carbon steel has good performance and economy, in fluid pipeline construction elbow is very commonly used. Other commonly used carbon steel materials are 20#, A3, Q235, Q235A, Q235B, ASTM A234WPB, A105, etc. 20# carbon steel elbow in the pipeline system is to change the direction of the pipe fittings, fluid pipeline engineering construction commonly used elbows 45 degree, 90 degree, 180 degree three, in addition according to the needs of the Customized project 60 degree and other non-standard elbows. Elbow connection methods include: direct butt welding, flange connection, threaded connection and socket connection. The production process of elbow can be divided into: welding elbow, stamping elbow, pushing elbow, casting elbow, etc. Carbon steel elbow is a widely used pipe fitting and is widely used in chemical industry, construction, water supply, drainage, petroleum, light and heavy industry, refrigeration, sanitation, plumbing, fire protection, electric power, aerospace, shipbuilding and other basic projects.
Commonly used materials for carbon steel elbows: (20#, A3, Q235, Q235A, Q235B, 20G, 16Mn, ASTM A234WPB, etc.);
20# carbon steel elbow is divided according to its radius of curvature: it can be divided into long radius elbow and short radius elbow. A long radius elbow refers to the outer diameter of a tube whose radius of curvature is equal to 1.5 times, i.e., R= 1,5D. A short radius elbow means that its radius of curvature is equal to the outside diameter of the pipe, i.e. R= 1.0D. (D is the diameter of the elbow, R is the radius of curvature).
According to the pressure level: there are about seventeen types, which are the same as American pipe standards, including: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80,SCH100,Sch120,Sch140,Sch160,XXS; Among them, the most used are STD and XS.
20# Carbon steel elbows can be divided into slotted elbows, ferrule elbows, double bearing elbows, flange elbows, reducing elbows, dull seat elbows, internal and external tooth elbows, stamping elbows, push in, socket elbows, butt weld elbows, internal wire elbows, etc.
China Pipe Fittings Manufacturing Standards:
GB/T12459-2017 steel butt welded seamless pipe fittings
GB/T13401-2017 butt welded pipe fittings made of steel plate
SH/T3408-2012 Steel Butt Welded Seamless Pipe Fittings
SH/T3409-1996 butt welded pipe fittings made of steel plate
SH/T3410-2012 Forged Steel Socket Welded Pipe Fittings
GB/T10752-1995 Marine Steel Pipe to Welded Joint
GB/T12772-1999 Flexible Interface Cast Iron Pipes and Fittings for Drainage
American Pipe Fitting Manufacturing Standards:
Factory Made Seamless Steel Pipe Butt Welded Pipe Fittings ASME/ANSI B16.9
ASME/ANSI B16.11 Welded and Threaded Pipe Connections with Socket
ASME/ANSI B16.28 Steel Butt Welded Small Radius Elbows and Turn Bends
ASME/ANSI B16.5 Pipe Flanges and Flange Fittings
MSS SP-43 Forged Stainless Steel Butt Welded Pipe Fittings
MSS SP-83 socket weld and threaded joint
MSS SP-97 Integral Reinforced Headers for Socket Welded, Threaded and Butt Welded Ends
