Company specializes in producing hot-rolled seamless steel tubes, with the ISO international quality system certification, special equipment manufacturing license, API-5CT/5L product certification, OHSAS18001 safety management certification and other qualifications. Production specifications 139.7 -141-152-154- 159 -168-180-188- 194 -203-222-212-- 219 -232-245-270- 273, etc., thickness 5.5 - 30. The main material 45 #, 345B, 345C, 37MN5, 36MN2V, 27SiMn, 10 #, 20 #, X42 - X60, production: hydraulic prop tube, oil casing, coupling, oil, bowl casing, cylinder pipe, line pipe, mechanical processing tube and, two-sided submerged arc spiral steel pipe 159-3620, ERW straight seam steel pipe 51-720, thermal expansion of steel and so on. Telephone communication