SZTSP is manufacturer of HFW / ERW steel pipe. OD: 5-1/2(139.7)~13-3/8 inch(339.7mm);Wall thickness: 0.138(3.8)~0.5 inch (12.7mm), Steel grade:A,B,X42-X70, H40, J55,K55;Standards: API spec 5L, API 5CT, ISO 9001-2000. annual output is 120thausand tons.SZTSP with investment RMB 106 million, was founded in 2001 and occupies a site space 86,000 sq. meters and building area 12,600 sq. meters. We established automatic PLC control production line and perfect Measuring &test center.So far, our factory has produced 350,000ton casing pipe and 800,000ton line pipe to Shengli, Daqing, Liaohe, Xinjiang oilfields, which are belong to SINOPEC Group.