Supply steel tube for gas and oil industry in standard of API 5LB/API 5CT/ASTM A106/ASTM A53/ASTM A179/ASTM A192/ASTM A333/DIN 1629/DIN 17175/DIN2391/EN10255/EN10305/EN10216 etc.
the size from 1/8"-16" for seamless steel pipe.