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Hi,
We have to build a column in SA-516-70 internally cladded in SA-240-316L (3 mm) for colamination.
In the circumferential joints we would have to remove about 3 mm in the carbon steel base material because we will have to perform the weld overlay so that we have 3 mm undiluted, getting to the same inside diameter as the colamined area (so about 6 mm total WO).
We have performed this in the past and no NoBo has ever commented on it, but I would like to understand if EN 13445 allows us to remove a few mm (which by calculation would not verify the equations) for just the area of the circumferential welds in the base material to then perform the WO.
If the design code was ASME we could consider the WO cooperating in those areas, definitely going to satisfy the equations. Does EN 13445 have any requirements for this? Or does ASME also allow this localized reduction without considering the WO collaborating?
Thank you
We have to build a column in SA-516-70 internally cladded in SA-240-316L (3 mm) for colamination.
In the circumferential joints we would have to remove about 3 mm in the carbon steel base material because we will have to perform the weld overlay so that we have 3 mm undiluted, getting to the same inside diameter as the colamined area (so about 6 mm total WO).
We have performed this in the past and no NoBo has ever commented on it, but I would like to understand if EN 13445 allows us to remove a few mm (which by calculation would not verify the equations) for just the area of the circumferential welds in the base material to then perform the WO.
If the design code was ASME we could consider the WO cooperating in those areas, definitely going to satisfy the equations. Does EN 13445 have any requirements for this? Or does ASME also allow this localized reduction without considering the WO collaborating?
Thank you
