Shanghai Changhao High Pressure Pipe Fittings Co., Ltd found in March 13, 2002 and located in No.696, PuxinRoad, pudong dew district, shanghai City, China. The transportation is very convenient. Our company is a manufacturer and trader. We have over 200 employees, boast an annual sales figure that exceeds USD 1,20000 and currently export 68% of our products worldwide.
We specialized in the research, development and production of insulation joints, insulating flanges, contain steel flanges, steel butt welding pipe fittings, forged pipe fittings, stainless steel pipe fittings and pipes etc. Our well-equipped facilities and excellent quality control throughout all stages of production enable us to guarantee total customer satisfaction. All of our products comply with international quality standards and are greatly appreciated in a variety of different markets throughout the world such as Europe, the United States, the Middle East and Sudan. In order to meet different requirements of customers and to satisfy with the International specifications and dimensional standards, we strict follow quality policy:
Organization: We have a quality control department handled by a team of Q.C. experts whose work is to maintain all the records & supervision of Q.C. Inspectors.
Processing System: While selecting raw material we carry out a physical and chemical test. After acceptance of it, a control number is issued which is marked on whole of the material that is to be used. At the time of forging and forming of flanges, fittings etc same control number is transferred to further operation. After final forging or heat treatment a batch number is allocated a lot and this batch number is stamped on each pipelining component. Time and date of final forging is also mentioned on the temperature chart.
Machining: After final heat treatment process, all the pipelining components are sent for machining that includes O/D and I/D matching as per dimensional codes. A expert quality control engineer keeps constant vigil on every machining operation. All the machining is carried out as required by the codes.
Testing: In this step, three types of testing are performed : Tensile testing, Hardness testing and Impact testing. In tensile testing, sample is taken from the pipelining components in accordance with codes as required by purchaser on universal testing machine calibrated & approved by the authorized inspection agencies. In hardness testing, results are recorded in separate register and it is performed on at least 10% of whole lot. Impact testing is carried out on low temperature fittings covered by specification ASTM A420 WPL grades.
Finishing: After pickling and passivating all pipes, tubes, fittings etc., scale is removed that is formed during forging operations. Finally dimensional check is carried out and recorded.
Marking: After the final dimensional check each fitting is marked for size, schedule, fitting specification, heat mark & batch number.
Certificate: All of our pipelining components supplied to the purchaser are furnished with manufacturer's test certificate which includes data i.e. raw material composition, heat treatment done, heat mark, batch number, hardness value, chemical & physical test results, radiography results, size, schedule, specification and quantity supplied.
Finally, if you are interested in any of our products, please feel free to contact us. We are looking forward to build a longtime business relationships with new clients around the world in the near future.
Street address: No 2585, Zhouzhu Road, Shanghai, China