... BS 1387 GB/T3091 (2)Material:20#,Q195,Q235,Q345,St 52,St 37(3)OD: 5mm -80mm (4)Wall Thinkness.:0 ... supply mainsDeep tube wells casing pipes, Gas/Natural gas pipe lines, Oil pipe lines, LPG & other non-toxic gas pipelinesIndustrial Purposes, Sewerage ... , Food Processing, Pharmaceutical, Petrochemical, Chemical, Machine Building, Automobile Seamless Steel Pipe