ASME IX groove weld type

[produit67]

Can anyone explain me if a bevel edge is imperative for a groove weld type according ASME IX.
Applications : pipes groove weld with 0.5mm to 2.8mm thick

thanks in advance

 

[metengr]

Imperative no. If you goal is to achieve full penetration, depending on welding process you can use a square edge butt joint. Qualify it.

 

[produit67]

Thanks for you answear "metengr".
Your answear is available even if the material will be under pressure ?

 

[metengr]

The Code does not always get into process details. If you can demonstrate by weld procedure qualification that you can achieve complete penetration for a groove weld using a square butt joint, this meets code.

 

[produit67]

It was why I'm asking. I'm preparing new WPQ to do ASME welding instead EN.

Thanks "metengr"

 

[stanweld]

A square bevel is most commonly used to make the groove weld in the thicknesses described. Note also that joint design is not an essential variable for qualification under ASME IX.

 

[produit67]

Thanks "stanweld" for your remark.
So, if I use a square bevel for my groove weld WPQ.
Can I make a fillet weld without bevel (square)covered by this WPQ?

 

[Duwe6]

ASME term for a ISO WPQ is "WPS", Welding Procedure Specification. Under Sect IX, any groove WPS qualifies for fillet welds. Just need to include "all fillets" in the WPS.

 

[produit67]

Does it mean, I have to list all fillet welding type (that I use) in the groove WPS "PQR" to be qualited by this unique WPS ?

 

[stanweld]

No. Groove weld qualification permits welding of fillet welds of all sizes.

 

[koenigma]

produit67, if you püt a bevel on a fillet weld it is no longer a fillet weld but a groove weld.

 

[GenB]

2.8mm is merely thin wall pipe and need no be beveled,
check t allowed in your procedure
clean the sharp edges is required.

 

[fakhfakh]

The groove design is nonessential variable but shall be specified in the WPS. Section 9 is concerned to qualify that a production weld will withstand the relevant mechanical propreties.

Now, the groove has to be designed according to the welding process you intend to use.

For that so thin pipe, a square preparation will be OK.