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Weld Neck Flange

  •  Weld Neck Flange
  •  Weld Neck Flange
  •  Weld Neck Flange
  •  Weld Neck Flange
Production Range
Type Nominal diameter Pressure
Flange America standard 1/2"~100" DN15-DN2500 Class150~Class2500
Flange Europe standard 1/2"~100" DN15-DN2500 PN2.5~PN400
Commonly Used Materials
Austenitic stainless steel Super duplex stainless steel Nickel-based alloy steel Carbon steel/alloy steel Other materials
304 304L 304H 304LN S31803 S32205 N10276 N04400 N06600 Q235 20# 20G TA1 TA2 TA3 TC1~TC9
316 316L 316H 316Ti S32304 S32760 N06600 N06625 N06690 WPB A105 16Mn LF2 LF3 LF5 LF6 LF10
310S 321 321H 347 S32550 S32750 N08800 N08825 N08904 45# 15CrMo Al, Ti, martensite
S31254 S33400 N08020 N08810 N08811 A350LF2 A420Gr.WPL6

Weld neck flange is also called high hub flange or tapered hub flange. It has a long tapered hub and is typically butt welded to a pipe, with its inside diameter matching that of the pipe. The adoption of butt welding technique helps to eliminate stress concentration. This kind of industrial pipe flange shows good sealing performance and is not easy to get deformed. Typical applications are found in environments having extremes of temperature and pressure, such as pipelines or valves whose PN is larger than 2.5MPa and pipelines transporting expensive, flammable, and explosive medium.

To ensure flange quality, Yuanyang has established an advanced inspection center to conduct ultrasonic detection and other tests for flanges. Our testing center is equipped with a full range of inspection machineries, including flaw detection machine, ultrasonic flaw detector, magnetic particle detector, and infiltration detector, etc.

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