... bends, nipples, socket olets, coupling, union and flanges MATERIAL: Carbon steel, alloy steel and stainless steel. Size: 1/8'' to 4 ... for threaded fittings. 3000LB, 6000LB, 9000LB for socket fittings. CE and certification: API, ISO9001: 2000 etc., STANDARDS: ANSI, ISO, ... JIS, DIN, GB, SH, AND HG etc., USE: Petroleum, chemical, power, gas, metallurgy, shipbuilding, ...