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Dimensions Lap Joint Stub Ends schedule STD XS ASME B16.9

The lap joint stub end is required when attach the lap-joint flange to the piping system. The stub end and lap-joint flange assembly are used mainly in piping systems that necessitate frequent dismantling for inspection or routine maintenance.

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Lap joint stub end is generally a section of the lap joint flange.The stub end of the stainless steel is matched with the carbon steel flange to form a lap joint flange.Lap joint flanges are often used when the medium temperature and pressure are not high and the medium is corrosive.When the medium is highly corrosive,the part of the flange that contacts the medium is a corrosion-resistant high-grade material such as stainless steel,and the outside is clamped with a flanged ring of a low-grade material such as carbon steel to achieve the seal.The lap joint stub end is required when attach the lap-joint flange to the piping system. The stub end and lap-joint flange assembly are used mainly in piping systems that necessitate frequent dismantling for inspection or routine maintenance. It is also used in the erection of large diameter or hand-to-adjust piping configurations because of the assembly’s quick bolt hole alignment.

Applications

  • Applications where rotating back flanges are preferred (to facilitate bolting)
  • The most widely used fabrication tool for stub ends is the flaring machine, which is able to flare the end of the pipe and then cuts it to length.
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