AS 3992 Welder Qualification

[Shiju]

Request help……….

[cassgazz]

Sorry, I thought the question was referring to procedure.

Welder does not need requalification if using the same welding process.

A new procedure however needs to be qualified as the joint efficiency has been decreased.

Test coupon welded both sides is ground/gouged to sound metal (GTSM). This is to achieve 100% fusion in the root.

Changing to welded from one side, 100% root penetration or fusion cannot be guaranteed.

[Flash]

Ironically no they do not require requal
but this is another case where AS3992 differs to AS1554.1
In my opinion this is incorrect they should have to requal
A WQT on double sided should NOT cover single sided, keep in mind AS/NZSs are a minimum and you may choose to get the operator qualified I know I would, as it could save you issues in production

As for WPS, the same applies, in my opinion you do NOT have to requal according to the standard, this does not mean I agree with it
See AS3992 Note 4 Table 5.1, — I think as 1554.1 has it right, single covers double but not the other way around
my understanding is – joint efficiency does not come into it as this applies to design – as it is the allowable stress in the joint as compared to the parent material

The biggest issue is single sided are not ideal for service conditions that involve fatigue and corrosion, I have seen single sided on more than one class 1, but a double sided should always be th preference

[Slag in Sleeve]

The awnser should be yes.

[Chris]

I agree with it, AS 1554.1 is a pain in the xxx,

[Author]

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