... .Quality: good ProductAlloy Steel Pipe P22 Size1/2"-72"Wall ThicknessSCH5S-SCH160 XS XXS STDStandardANSI,ASME,JIS,DIN,GB,BS ... ,chemical industry,medical,papermaking,etcSurface Treatmentpolishing treatment ,rust-proof black oilQualityHigh leverCE,certificationISO 9001:2000,API,BV,SGS,LOIYDRemarkAlso can ... &HIC Fittings Erw--round,Square,Rectangular Section--steel Pipe--black Colored,Galvanized