Re: [MW:19332] direct weld on line pipe

Mr. Kumar,

These kind of activities are not at all permitted unless otherwise agreed from your Client. (for identifying the pipe number at site), these arrangements must be removed and Magnetic Particle Testing to be carried out to ensure free from surface defects due to welding and even required to check also hardness.

Further please refer Section 11 in Specification for Line Pipe, ANSI / API Specification 5L, 44th Edition for more information about marking of line pipe ends.

P Govindan

On Thu, Nov 21, 2013 at 3:36 PM, Kumar <sk7920541@gmail.com> wrote:

dear all,

In our project, the sub-contractor is using metallic rectangular piece (about 8mm thick, 50X30 mm size) of un-known origin & which  is directly tack-welded (they say tig) near the pipe end(API 5L Gr.B). this is for maintaining the spool traceabilty while sending it to field from shop. but generally  permanent markers are used to write the details on the internals of pipes, but here the sub-con not agreeing for this. most of the projects doesn't allow direct welding on pipes except wear pads supports etc. but those are with approved design & drawing.

here they say it will be removed at the field, but still we worry about the stresses and HAZ.etc...this welding doesnt have procedure as well. please share the valuable views and technical explanations to substantiate our stand (to seek other alternate methods- marker etc). photograph is attached with.

Thanks in advance,

Kumar

 

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