The standard of elbow

　　Standard number and Description

　　B2311 JIS general steel butt welded pipe fittings

　　B2312 JIS steel butt welded pipe parts

　　B2313 JIS steel plate for welded pipe parts

　　B2316 JIS steel socket welding pipe fittings

　　American Standard for pipe fittings:

　　Standard number and Description

　　B16.9 ASME/ANSI factory manufactured forged steel butt welded pipe pieces

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

　　ASME/ANSI B16.28 steel butt welding of small radius elbow and back bending

　　B16.5 ASME pipe flanges and flange fittings

　　SP-43 MSS forged stainless steel butt welded pipe pieces

　　SP-79 MSS socket weld different diameter insert

　　SP-83 MSS socket welding and threaded joint

　　MSS SP-97 the overall plug welding and butt welding ends, threaded sockets strengthen

　　power

　　Standard number and Description

　　GB2000 thermal power plant steam water pipe parts and components of the typical design manual

　　DL/T515-93 power station elbow

　　Typical design of D-GD87-1101 pipe parts and components

　　Standard for chemical engineering of pipe fittings:

　　Standard number & Description

　　HGJ514 carbon steel, low alloy steel seamless welded pipe fittings