... as customer requirements)anglestructure pipe oil pipe thicknessSCH10,SCH20,SCH30,STD SCH40, SCH60, XS, SCH80., SCH100, SCH120, SCH140, SCH160, XXSstandardASME B16 ... the license for manufacturing special pressure Pipline equipments from AQSIQ , API and became a member of first – grade supply network of ...