Re: [MW:30461] Re: Time between root pass and hot pass

Dear, 

Even if it is mentioned in code, if it is not in WPS or the project specification, then you are not required to do it mandatory. An engineering query can be raised and this can be considered as interruption of welding. In such case, the following methods can be suggested. 

1. Visual examination of root to check out for cracks 

2.DPT to check for fine cracks open to surface. 

3. Radiography to ensure no cracks inside.

Hope this helps.

Regards, 

Charles  Jacob 

Welding Consultant

Magnum Consultancy Services

+91 7034331779  

On Mon, Feb 10, 2020, 12:46 PM <tahirkaimi@gmail.com> wrote:

would you please guide me that can we left the joints after hot pass and complete the joints next day.

On Tuesday, 15 May 2012 18:25:43 UTC+5, jesti fer wrote:

Dear all,

We are doing 20" pipe line project with API 5L Gr.B material as per B31.4, Welding process SMAW (E6010 for root and rest with E 7018, both are up-hill) our welder welded one joint root pass and he kept this joint for long time. But our Qc instructed to cut and re-weld the joint. But the time between root pass and hot pass not mentioned in approved WPS and client specification also.

It necessary to cut and re-weld?

It is mentioned any were in the code (ASME or API)?

 

Please help me,,

  

Best Regards

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