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· The characteristics of the Pipe fitting stainless steel reducer
· The forming of seamless steel pipe
· Analysis of main causes causing the decline of bend quality
· Manufacturing process of pipe tee
· Brief introduction of forged fitting
· The Stainless Steel Welding Ellipsoidal Head Pipe Cap heat treatment method
· Processing method of Seamless Steel Pipe Elbow


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Product level and technical requirements for weld neck flanges
Source :admin   Time:3/21/2018 2:40:27 AM   hit:

  Welding in the actual production process, with certain technical parameters and requirements for production and application, in order to ensure the use and promotion of the right in a certain way and principle, the process principle and colleagues for production and to ensure reliable quality of welding, welding flange in use.

  The product level and technical requirements of the weld neck flange shall meet the requirements of the JB4726-4728. The carbon steel or austenitic stainless steel forgings of the nominal pressure at 0.25MP-1.0MPa are allowed to be made with grade I forgings. The forgings between the nominal pressure and 1.6MPa-6.3MPa shall be in accordance with the standard requirements of the grade II or more than grade II. For the flange nominal pressure of not less than 10.0MPa in forging, nominal pressure more than 4.0MPa chrome molybdenum steel forgings, nominal pressure more than 1.6MPa and less than -20 degrees Celsius temperature of ferrite products of steel forgings, the Forged Stainless Steel 304 316 Weld Neck Flange must comply with the relevant requirements of grade III forgings.

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