Weld ring gaskets

We recommend weld ring gaskets for use in any place where a welded seal is necessary, due either to the danger of themedium or the danger presented by a loss of functionality, but where the connection also needs to be detachable to a certain degree. These gaskets are therefore described… Read more


Product description

We recommend weld ring gaskets for use in any place where a welded seal is necessary, due either to the danger of the
medium or the danger presented by a loss of functionality, but where the connection also needs to be detachable to a certain degree.

These gaskets are therefore described as being semidetachable, as the welded sealing joint needs to be undone as well as the flange bolts.
Weld ring gaskets are generally made of the same or a related material as the pipe or flange and are only used in pairs.

The choice between the various profiles depends on the operating conditions of the weld ring gasket. The table shows the
typical features of Profiles A21 to A25. The ”attachment seam“ is the connection of a welded half with the flange. The
”attachment seam“ can be located internally or externally. The ”seal seam“ is always the welding of both weld rings with one another.

ProfileInternal “attachment seam” Crevice corrosion between weld ring and flange is avoidedExternal “attachment seam” Re-welding or disassembly possibleCapacity of radial differential expansionUndo and re-weld
UsualNot possibleDepending on the thickness of the wall of the torus, to a max. ∆ r ~ 5 mmEasy to separate with a 2 mm cutting wheel. Can be re-welded 2 to 4 times
Welding sealPossible to have additional attachment. Intermittently weldedUsual Depending on the thickness of the wall of the torus, to a max. ∆ r ~ 5 mmEasy to separate with a 2 mm cutting wheel. Can be re-welded 2 to 4 times
Welding sealOnly as additional attachment. Intermittently welded.If there is dangerUsual setupOnly as additional attachment aid.Intermittently welded of corrosion Only low capacity due to the small lip. Max. ∆ r ~ 0,5 mmDifficult to separate. Can be re-welded 1 to 3 times
Welding sealOnly as additional attachment. Intermittently welded.If there is dangerUsual setupOnly as additional attachment aid.Intermittently welded of corrosion Not really possible. Max. ∆ r ~ 0,1 mmWith cutting wheel separation loss 2 to 3 mm respectively. Can be re-welded of corrosion 3 to 5 times
Welding sealUsualNot possible flange from M in accordance with DIN 2526 alsoModest capacity depending on projection max. ∆ r ~ 0,3 mmWith cutting wheel separation loss 2 to 3 mm respectively. Can be necessary re-welded 2 to 4 times

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Axel Barman

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Anton Heinonen

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Jani Häkkinen

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Marko Nikka

Area Sales Manager, Northern Finland

+358 10 400 1583
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Johan Immonen

Area Sales Manager, Eastern Finland

+358 10 400 1584
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Jaakko Kajava

Area Sales Manager, Southern Finland

+358 10 400 1582
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