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 neutral in the atmosphere and resistant to acid and alkali. It is a 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 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). Classified 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 commonly used ones are STD and XS

Chinese pipe fittings manufacturing standards:

GB/T12459-2017 Steel butt welded seamless pipe fittings

GB/T13401-2017 Steel butt welded seamless pipe fittings

SH/T340-2012 Steel butt welded seamless pipe fittings

SH/T340-1996 Steel butt welded pipe fittings

SH/T3410-2012 Forged steel socket welded pipe fittings

GB/T10752-1995 Marine steel pipe butt welded joints

GB/T12772-1999 Flexible interface cast iron pipes and fittings for drainage

American pipe fittings manufacturing standards:

ASME/ANSI B16.9 Factory manufacturing Seamless steel pipe fittings for butt welding

ASME/ANSI B16.11 socket welding and threaded forging fittings

ASME/ANSI B16.28 steel butt welding small radius elbows and return bends

ASME/ANSI B16.5 pipe flanges and flange fittings

MSS SP-43 forged stainless steel butt welding fittings

MSS SP-83 socket welding and threaded joints

MSS SP-97 socket welding Integral reinforced pipe socket with threaded and welded ends