Liaocheng Xinglong Seamless Steel Tube Manufacturing Co, Ltd. has equipped 60, 90, 140 and 325 mill lines. Production Specification covers 27-508*4-100mm. The full capacity is above 600 thousand tons. 325ASSEL tube rolling mill is the domestic largest 3-roller mill at present. Adopting world advanced 3-roller tube rolling mill with quick-start roller and Grade-3 computer automatic control system, it ensures production precision scientifically and efficiently, gets high reputation among experts in steel tube industry and fills the domestic gap There are over 60, 000 tons stock products, running specifications more than 3, 000 kinds. Our production range: OD: 25-426 mm, WT4-80mm. The materials of the products are as follows:20#, 45#, 16Mn, 27SiMn, 15CrMo, 30CrMo, 34CrMo4, 12Cr1MoV, J55, K55, N80.L80, P110etc. The Standards: GB8162-2008, GB8163-2008, GB3087-2008, GB5310-1995, GB6479-2000, ASTM A 53, A106, API 5L/5CT, DIN, JIS etc. Our company has equipped with sophisticated manufacturing and testing equipments. These equipments and technologies guarantee that the production and testing processes are up to relevant standards. So the products can satisfy the requirements of clients doubtlessly.