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