20 # carbon steel elbow

20 # carbon steel elbow refers to an elbow made of 20 # seamless steel pipe as the base material. Carbon steel has good performance and economy, and is a commonly used elbow in fluid pipeline construction. Other commonly used carbon steel materials include 20 #, A3, Q235, Q235A, Q235B, ASTM A234WPB, A105, etc. The 20 # carbon steel elbow is a pipe fitting used in pipeline systems to change the direction of the pipeline. There are three commonly used elbows in fluid pipeline engineering construction: 45 °, 90 °, and 180 °. In addition, other non-standard elbows such as 60 ° can be customized according to project needs. The ways of connecting elbows include direct butt welding, flange connection, threaded connection, and socket connection. The production process of elbows can be divided into: welded elbows, stamped elbows, push made elbows, cast elbows, etc. Carbon steel elbow is a commonly used pipe fitting widely used in basic engineering such as chemical, construction, water supply, drainage, petroleum, light and heavy industries, refrigeration, sanitation, plumbing, fire protection, power, aerospace, shipbuilding, etc.

Common materials for carbon steel elbows: (20 #, A3, Q235, Q235A, Q235B, 20G, 16Mn, ASTM A234WPB, etc.);

Carbon steel elbows can be divided into long radius elbows and short radius elbows according to their curvature radius. A long radius elbow refers to a pipe with a curvature radius equal to 1.5 times the outer diameter of the pipe, i.e. R=1.5D. A short radius elbow refers to a curvature radius equal to the outer diameter of the pipe, i.e. R=1.0D. (D is the diameter of the elbow, R is the radius of curvature).

Divided by pressure level: There are approximately seventeen types, which are the same as the pipe standards in the United States, including: Sch5s、Sch10s、Sch10、Sch20、Sch30、Sch40s、STD、Sch40、Sch60、Sch80s、XS; Sch80、SCH100、Sch120、Sch140、Sch160、XXS; The most commonly used ones are STD and XS.

20 # carbon steel elbows can be divided into groove elbows, sleeve elbows, double bearing elbows, flange elbows, reducing elbows, seated elbows, internal and external tooth elbows, stamped elbows, push elbows, socket elbows, butt welded elbows, internal wire elbows, etc. according to their different shapes and purposes.

Chinese Pipe Fitting Manufacturing Standards:

GB/T12459-2017 Steel butt welded seamless fittings

GB/T13401-2017 Steel plate welded pipe fittings

SH/T3408-2012 Steel butt welded seamless pipe fittings

SH/T3409-1996 Steel plate butt welded pipe fittings

SH/T3410-2012 Forged steel socket welded pipe fittings

GB/T10752-1995 Marine steel pipe butt welded joints

Flexible interface cast iron pipes and fittings for drainage

American Pipe Fitting Manufacturing Standards:

ASME/ANSI B16.9 factory manufactured seamless steel pipe fittings for butt welding

ASME/ANSI B16.11 socket welded and threaded forged fittings

ASME/ANSI B16.28 Steel butt welded small radius elbows and return 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 union

MSS SP-97 integral reinforced socket, threaded and butt welded ends