Re: Re: [MW:28746] Piping ID chamfer mark in RT Films

Hi,

Usually you will not have fittings of fine prepartion as pipe, especially elbows, so in this case a sound welder knows how to fuse, but if you are getting pattern defects like  each individual welders same observation, then yes you have to investigate.

As you stated your thickness is in reduction more than 1.25 mm which is not acceptable, as your thickness is 10.97mm, then you can accept till 9.9mm which is 10% of tolerance as per ASME, anyhow as experts said i agree that it would have been checked during receving inspection and observaton has been recorded even if it is under tolerance which is acceptable, if not acceptable then you should qurantine with non conformance and notify manufacturer.

But i do not agree saying reduction / tool mark after HAZ has been touched for edge preparations or you welded then you cut after defect, then you check with callipers saying reduction, check the non fabricated pipes of same lot / heat for tool mark or reduction in ID.

Also, please confirm ''Normal pipe ID 145.3 damaged pipe ID 149.3''   HOW? after damage your pipe ID got excess?

Linear indication: what type of linear indication specify?

Thanks.

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Regards,

Mohamed Muneeb Mahaboob

CSWIP 3.2-89247/2 

ASNT-NDT-L2-RTFI-RT-UT-MT-PT.

SAP#:70021650 APs:JAPID, QCS & QCI.

E muneebslsa@gmail.com M +91-636-955-7189

"Whoever does not show mercy to the people, Allah will not show mercy to him." (Jami` at-Tirmidhi, Vol. 4, Book 1 1922) 

From: Perumal Govindan

Date: 2018-12-10 22:42

To: materials-welding@googlegroups.com

Subject: Re: [MW:28744] Piping ID chamfer mark in RT Films

Hi

It was not noticed prior to fitup by QC inspector, such issues shall be highlighted and raise concerns to the manufacturer or supplier.

Now, the incoming material inspection was done and accepted by Client. Only the option is explain to Client for acceptance, otherwise cut and reweld for acceptance.

Such kind of bevel edge preparation or thickness reduction was to be highlighted in the manufacturer shop itself by the source inspector during material inspection, so you can raise NCR to the third party inspection agency as well.

With Regards 

P Govindan 

On Monday, December 10, 2018, Mohan <ggnanamalli@gmail.com> wrote:

Hi Experts,

The piping pre fabrication work going in HRSG piping , in which it has been found that some of the 6" pipe to elbow welding for downcomer are not satisfactory. 

When investigated it was found that pipes, which has been supplied, there are some tool mark in inner surface(refer photo).

 When the thickness measured there is a reduction of 1.25 to 2 mm in thickness and in radiography a dark clear linear indication.

Whether it's acceptable, if its acceptable means suggest code reference 

or we have cut and re-weld

Regards

G Mohanraj

 

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With Kind Regards

P Govindan 

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