1.Certificate:ISO9001 2.ID:25mm~40mm 3.OD:According your requirmeny 4.Material:20#,45#,16Mn,27SiMn Steel Application:Used in oil,gas or fluid,Construction,Electricity,Machine building industy,Chemical industy,Petroleum,Traffic. etc.Package,shipment and surface treatment: 1.Package: Plain or bevelled ends; Marks on pipes; Paint varnish or oiled; With plastic caps In bundle. 2.Shipment: (1)By ...