... :from 24" to 96"( or as customer requirements)anglestructure pipe oil pipe thicknessSCH10,SCH20,SCH30,STD SCH40, SCH60, XS, SCH80., ... also qualified the standard material supplier of China National Offshore Oil Corporation and China Petroleum Pipline Bureau.It was recognized by China ... papermaking, construction, etcSpecial design available as the requirement of customer oil well drilling chemicals