... holding water,oil,gas,etc.(Black)Painting,Galvanized,Elctro-plating.standardsCompany Stand:Q/T M05-2006(partially based on JIS ... ≥330Mpa,Elongation rate≥8%;Hardness≤HB150Certificate:UL;ISOMechanical Properties GB/T 9440,KTH300-06Water Pressure Test Using pressure test, ... Dip Galvanization:Average Thickness of Hot-Dip Galvanization:70umThread GB/T 7306.1-2000,GB/T 7306.2 beaded malleable iron tee