Polyethylene insulation Solenoid days Hui spiral steel pipe plant spiral steel pipe spiral steel pipe pump tube fabric pvdf pipe the Hebei spiral steel pipe plant, spiral steel pipe factory, Hebei straight seam submerged arc welded spiral steel pipe factory, submerged arc welding straight seam spiral steel pipe factory, heat pipe plant , insulation spiral steel pipe factory, insulation pipes factory, the anticorrosive spiral steel pipe factory, anti-corrosion pipe plant, pipeline corrosion insulation plant, pipe insulation preserving plant, hot-rolled spiral steel pipe factory, pressure spiral steel pipe factory, pressure pipe plant, pipe fittings factory, spiral steel pipe manufacturer of straight seam spiral steel pipe manufacturers, the hot rolled spiral steel pipe manufacturer, pressure spiral steel prices, the spiral steel prices, prices of hot-rolled spiral steel pipe, straight seam spiral steel prices, the price of anti-corrosion spiral steel pipe, insulation spiral steel prices, China spiral steel pipe production base, pipe manufacturing base. Specializing in the production of different caliber grade of "Tian Hui" brand spiral steel pipe, straight seam spiral steel, hot-rolled spiral steel pipe, spiral steel pipe of thermal expansion, pressure spiral steel pipe, pressure pipe, the anticorrosive spiral steel pipe anti-corrosion pipe insulation spiral steel pipe, insulation pipes, heat pipe, piling spiral steel pipe, dredging spiral steel. Used in all SY/T5037, GB/T9711, GB/T8163, GB/T8162, APISpec5L standard. Professional production D219mm-D2420 * 5-32mm, Q235, Q345, 10, 20 #, 16Mn, L245, L290, L360, X42-X70 grade "Tian Hui" brand spiral submerged arc welded spiral steel pipe, D340mm-1420 * 6-50mm large diameter thick wall straight seam spiral steel, hot-rolled spiral steel pipe, spiral steel thermal expansion. The products are used in all SY/T5037-2000 GB/T9711.1-1997, GB/T8163, GB/T8162, APISpec5L standard production.