... ,DIN,BS,AISI We are manufacture and trading company for kinds of steel pipes in ... thickness1mm-160mm thread typeBTC,LTC,STC thread and coupling can be required certificatesAPI,ISO,CE ... conveyance of gas, petroleum, liquid, and electricity2. We have engineering team for pipeline system building3. We have ... G3452, EN1021, EN10305 etcWe've been in steel trading market for more than 5years .I'm sure ...