Specifications and appearance quality "low-pressure boiler seamless steel" requirement. Various structural boiler pipe specifications grl15 precision light pipe, diameter 10 ~ 426mm, a total of 43 kinds. Wall thickness of 1.5 ~ 26mm total of 29 species. However, superheated steam locomotive boiler tubes, opium pipe, otherwise small pipe diameter and wall thickness and brick arch tube. "High-pressure boiler seamless" hot-rolled tube outer diameter of 22 ~ 530mm precision light pipe factory, cold drawn pipe wall thickness of 20 ~ 70mm outside diameter 10 ~ 108mm 35 # precision light pipe wall thickness ranging from 2.0-13.0mm. "Low-pressure boiler seamless steel" and GB5310-95 "high-pressure boiler seamless steel pipe" requirement. Appearance quality: internal and external surfaces of the steel pipe does not allow cracks, folding, rolling, folding, scarring, separation and hairline. These defects should be completely removed. Clear depth shall not exceed the nominal wall thickness negative deviation precision light pipe, its cleanup at the actual wall thickness of not less than the minimum allowable 5. Pre-welding: straight seam welded steel pipe seam so that after forming and using gas shielded arc welding ( MAG) continuous welding; 6 in the welding: The tandem multi-wire submerged arc welding (up to four wire) on the inside of the straight seam welded steel pipe; 7. Welded: The tandem multi-wire submerged arc welding straight seam outside of the submerged arc welded steel pipe; The ultrasonic inspection Ⅰ: inside and outside of the straight seam welded steel pipe on both sides of the base metal and weld seam 100% inspection; 9.X-ray inspection Ⅰ: internal and external welds 100% X-ray television industry inspection, using an image processing system to ensure the detection sensitivity; 10. flaring: the full length of straight pipe joints SAW expanded in diameter to improve the dimensional accuracy of the steel pipe, and to improve the distribution of internal stress of the steel pipe; 11. Pressure test: the hydrostatic test machine pipe after expanding by-root test to ensure the pipe to test pressure requirements of the standard, the machine has an automatic recording and storage capabilities; high-precision light tube, precision light pipe, virtue Liaocheng City Pipe Co., Ltd. is provided by virtue of Industry. Liaocheng virtue Pipe Co., Ltd. (www.meidegc.com) (www.meidegc.com) (www.mdwfg.com) (www.mdggc.com) strong, credible, Liaocheng in Shandong steel industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead virtue of Industry and you work into the brilliant, for a better future!