• Steel Flanges

    A flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system, provides easy access for cleaning, inspection or modification. read more

  • Pipe Fittings

    The ends of all buttweld fittings are bevelled.The shape of the bevel depending upon the actual wall thickness.This bevelled ends are needed to be able to make a "Butt weld". read more

  • Steel Pipes

    Pipe is a hollow tube with round cross section for the conveyance of products. The products include fluids, gas, pellets, powders and more. read more

Hebei haihao flange factory got the production plan in october for the high pressure flange ASTM A694  F65 material flanges.



The flanges are weld neck flange Class 900, RF sealing face as per ASME B16.47 Serie A , they are  going to be jointed in the oil and gas pipeline, quality is very important . Our client and end user visited and checked many flange factories in China and other countries from the beginning of this year. After nearly ten months evaluation, our company was qualified from all the suppliers becuase of our excellent production capacity and quality control. 



We have rich experience in the production of high strength forged matrial flanges of ASTM A694 series, like ASTM A694 F46, F52, F56, F60, F65, F70 grade steel.  Haihao flange is professional about the manufacturing process and raw material selection, the most important thing is we also have trustworthy technical about the heat treatment of such steel materials,which has very strict heat treatment request.  


After the inspection of the client, the flanges are as per ASTM A694 standard and client requirement completely,then we made the package for these large size flanges, We believe ,our goods will support our clients project successfully.  



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haihao has been a professional supplier of pipes,fittings and flanges, serving the world industry piping since 1982.
oil and gas industry

as a leading manufacturer,stockist and supplier, our knowledgeable and experienced technical team can understand well what you need . help you find the best solution for your regular and specific requirement.
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Serving the world flowing! Aiming to be the best in the field! Improving level of “Made in China”!”

Tom , Haihao Group

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