... 10-76mm; (1)Standard:ASTM A53 BS 1387 GB/T3091 (2)Material:20#,Q195,Q235,Q345,St 52 ... tube wells casing pipes, Gas/Natural gas pipe lines, Oil pipe lines, LPG & other non-toxic gas pipelinesIndustrial ... Cold storages, Tabular polesFire Protection Systems, HVAC, Plumbing,Fabrication industry, Food Processing, Pharmaceutical, Petrochemical, Chemical, Machine Building, Automobile Seamless Steel Pipe ...