Re: [MW:30133] Distance between two weld joint

Dear Siva,

You must be aware that min. separation distance between two welds is to isolate there heat affected zone (HAZ).

HAZ depends on so many factors out of which thickness is the key one.

So as Mohsin and Adam suggested, these requirements are mainly guided by client's specifications based on their practical experiences or lesson learnt. 

So you could take gap between two welds as maximum between 50 mm (based on good engineering practice), twice the wall thickness of the thicker pressure part (As Adam advised) and 20 mm or three times the wall thickness of the joint (as Mohsin advised).

If you go with the above for sure you will not face any issue.

Also take note that if you are asking about the weld joints for piping spool, it will be good to have the minimum spool length as equal to pipe nominal diameter for 6" and above and for lesser size it should be 100 mm. 

Thanks

On Thu, Oct 10, 2019 at 8:44 AM mohsin tufail <mohsin6tufail@gmail.com> wrote:

reference aramco standard w-11 

11.1

The minimum distance between parallel butt welds shall be 20 mm or 

three times the wall thickness of the joint, whichever is greater

On Wed, Oct 9, 2019, 10:32 AM Adam Janzeer <adamjanzeer4@gmail.com> wrote:

Dear moshin

Based on which reference....

On Wed, Oct 9, 2019 at 9:18 AM mohsin tufail <mohsin6tufail@gmail.com> wrote:

20mm or three times of the wall thickness which is greater

On Fri, Oct 4, 2019, 2:19 PM siva Guru <dhanaguru2010@gmail.com> wrote:

Dear All

Can you advice, 

two weld  joint how much Min distance between weldjoints.

Please clarify, if possible please provide code reference.

Best regards

Guru

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