Zhe jiang Tengyu Stainless Steel pipe Co., Ltd. is a modern private joint-equity enterprise. It is located in Tongxiang, Zhejiang Province, a county known for its fame of “Land of Hangzhou chrysanthemum Flower”. This enterprise specializes in production of welded stainless pipes of different calibers. Its products are widely used in industries like oil, chemicals, environment protection, pharmaceuticals, paper making, food, nuclear electricity generation, military projects, machinery, energy, boiler exchangers, etc. The company currently produces 5, 000 tons of different sorts of stainless tubes, whose main materials include 301, 304, 304L, 321, 316, 316L, 310S and so forth. Outer diameters of these products vary from 21.3mm to 2, 500m, and wall thickness varies from 1.65mm to 35mm. 　　The company’s plasma welding production line imported from Germany incorporates the functions of intelligent selection, rzeppa type forming, treatment and shaping of outer and inner welding beads, and caliber measuring devices. The company’s production equipment covers a complete range and the processes the company employs are advanced. A complete range of testing and inspecting devices, like hydraulic testing devices, X-ray fault detectors, eddy defect detectors, spectrum analyzers, chemical analyzers, mechanical aptitude testers, etc., are equipped in the company to insure product quality, which means high quality welded stainless tubes produced strictly in conformity with GB, HG, ASTM, DIN, JIS and other standards. Holding the principle of “ Quality first, credibility as the base” and the operation motto of “ Create value for customers”, the company provides products and services of top quality to customers at home and *****