304 stainless steel elbow

304 stainless steel elbow is an elbow made of 304 material, which is a type of stainless steel produced according to the ASTM standard in the United States. 304 is equivalent to China's new grades 30408, 0Cr19Ni10, and old grades 0Cr18Ni9 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, and low-temperature mechanical properties. It is corrosion-resistant and resistant to acid and alkali in the atmosphere. It is the most commonly used material in the manufacturing of fluid fittings. 304 stainless steel elbows are fittings that change the direction of pipelines in piping systems. According to the angle, there are three most commonly used types: 45 °, 90 °, and 180 °. In addition, other abnormal angle elbows such as 60 ° are also included according to engineering 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, and push made elbows.

The commonly used materials for stainless steel elbows include: 304, 304L, 316, 316L, S30408, S30403, S31608, S31603, SUS304, ASTM A403, TP321, TP317L, 347, 0Cr18Ni9, 00Cr19Ni10, 00Cr17Ni14Mo2, 1Cr18Ni9Ti, 06Cr17Ni12Mo2, 022Cr17Ni12Mo2, etc; Dual phase stainless steel: (F51, S31803, S2205, F53, 2507, S32750, F55, 2607, S32760, etc.);

304 stainless 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.

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