"DIN" and "ANSI flanges", the temperature-pressure rating is determined by comparing the performance of Chinese materials with European materials and American materials, using the pressure-temperature parameters of the corresponding materials specified in ISO 7005-1.

High-quality products

Welded neck flange not easy to  distortion, good sealing, widely used, butt thinning transition weld joints ,horn shape, avoid shape change when welding in high temperature. applicable to high temperature pipeline, high pressure and low temperature pipeline, normally used to connect  pipes and valves which PN is greater than 2.5MPa; also used to transport expensive, flammable, explosive media pipeline.

Our packaging

Steel Flange Production Process                      

Steel Flange workshop

Production Process

  Cangzhou Haoyuan Pipe Fitting Mfg Co.,Ltd. Is a professional manufacturer which can produce all kinds of carbon steel ,alloy steel and stainless steel high and low pressure flange, elbow, tee, cross, reducer, bend, pipe cap, seamless steel pipe and ERW pipes in accordance with the production standard ASME, DIN, JIS, EN, BS, GB, GOST, etc .
Products are sold at home and abroad. Enterprise has the first-class production equipment of cold forming, hot push-pull, forging and testing equipment of physical and chemical, metallurgical, detection, spectrum and so on,having complete mechanical testing system.Over the years, the company provide good quality pipe and pipe fitting products for domestic thermal power, chemical, shipbuilding, metallurgy, pressure machine, oil and petrochemical, and other key projects. At the same time, the products are also exported to Europe, America, Middle East, Africa and Southeast Asia and other countries and regions.
The company has a number of  professional staff. Passed the ISO9000 international quality system certification, and achieved a pressure vessel certificate, plays an important role in this production field. We adopt scientific production process, strict quality management, advanced service concept, and reasonable prices to win a good reputation, established a close and pleasant cooperation with domestic and foreign customers.