steel pipe fittings Size:1/2"-48" Material:A234-WPB,A420-WPL6,A234- ... -Sch160XXS 4.Standard:ISO, SNSI, JIS, DIN, GB/T12459GB/T13401ASME B16.9SH3408 SH3409HG/T21635HG/T21631SY/T05010 5.Material:A234-WPB.A420 ... range:Petroleum, chemical, power, gas, metallurgy, shipbuilding, construction, etc steel pipe fittings