304 stainless steel elbow is an elbow made of 304 material, 304 material is a type of stainless steel, 304 stainless steel is a grade of stainless steel produced according to the American ASTM standard. 304 is equivalent to China's new 30408, 0Cr19Ni10 grades and old 0Cr18Ni9 grades of stainless steel. 304 contains 19% chromium and 9% nickel. 304 stainless steel is a widely used chromium-nickel stainless steel, with good corrosion resistance, heat resistance, low temperature resistance mechanical properties, corrosion resistance in the atmosphere, acid and alkali resistance. It is one of the most used materials in the manufacture of fluid pipe fittings. 304 stainless steel elbow is a pipe fitting that changes the direction of the pipe in the pipe system. According to the angle, there are three most commonly used 45 degree and 90 degree 180 degree, and other abnormal angle elbows such as 60 degree are included according to engineering needs. 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.
Commonly used materials for stainless steel elbows are: (304, 304L, 316, 316L, S30408, S30403, S31608, S31603, SUS304, ASTM A403, TP321, TP317L, 347, 0Cr18Ni9, {{ 16}}Cr19Ni10, 00Cr17Ni14Mo2, 1Cr18Ni9Ti, 06Cr17Ni12Mo2, 022Cr17Ni12Mo2, etc.); Duplex stainless steel: (F51, S31803, S2205, F53, 2507, S32750, F55, 2607, S32760, etc.);
304 stainless 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.
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 heads for socket welded, threaded and butt welded ends.
