GI pipes of China 1.OD:21.3mm-219mm 2.Thickness:0.5mm-8mm ... ,API,JIS,DIN,EN,BSMaterialQ195,Q215,Q235,Q345Zinc-coating80GSM-200GSMTechniqueWeldedProcessing technology Threading, coupling, plastic caps protectedPackingStandard export packing or as requestProductivity100000T ...