Closure Weld Requirements for Lines Designed According to ASME B31.1

Without knowing the pipe material, wall thickness, conveyed fluid, etc., it's impossible to know why HT (are we talking about oven heat-treatment?) is required. Why do you think additional examination eliminates the need for heat treatment/stress relief?

OK, so we're talking about HT = hydrotest, HT ≠ heat-treatment as I assumed. That makes more sense. Ignore my previous response.

I'm not sure this will help, but you might see how "golden welds" are handled in the code you are using.

What is keeping you from doing the hydrostatic test on all but a few final welds?

Thanks to all The problem is that the contract specs is little bit weak, though it's not mentioned there, but any better to follow tornado suggestion and SURE it will work ;)..

Then write off any extra costs to it being a learning exercise, never to be repeated:

• There's a story about a young Engineer, who was asked to go and do something out on the plant that was beyond then-current skill sets. A calamity happened, and £500,000GBP worth of product went off-spec. Called in to the Manager's office and expecting to get fired, the Engineer was surprised and relieved to discover being kept on the payroll. In response to the question why this was to be the case, the Manager replied, "Because I have just invested £500,000GBP in your training, and I am determined to get a return on that investment!"

No problem if neglecting a few amoune of joints but for more assurance we will try to push the contractor to do it neglecting some minor issues on project specs. But if I find the clear statement it will be very nice. Thank you.

Well, if it's opinion-based requirements, then the contractor is entitled to be paid for any inconvenience arising due to being asked to do extra things that were not specified when tendering and at contract award.

So the answer to the query depends upon what is in the contract documents, which probably commercially sensitive, and therefore should not be revealed here. In any case, they cannot be seen from here at this time.

So good luck in sorting that one out.

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I get mixed messages here. So it might be better to explain:

What is HT, RT, DPT???!

I was thinking HT is Hydro Test, but I am not so sure anymore and DPT does not make any sense.

Hydro test, radiography test, dye penetrant test.

Mr IDEASMITH,

HT = HYDRO TEST OR HEAT TREATMENT.

RT = RADIOGRAPHY TEST

DPT = DYE PENETRANT TEST

ALL ABOVE TEST MAY BE REQUIRED TO BE CARRIED OUT IF LINE CLOSURE WELDING IS TO BE CARRIED OUT UNDER THE CODE ASMEB31.1

IdeaSmith,

NDT - Non Destructive Testing

NDE - Non Destructive Examination or Non Destructive Evaluation

NDI - Non Destructive Inspection

http://en.wikipedia.org/wiki/Nondestructive_testing

http://en.wikipedia.org/wiki/Visual_inspection

http://en.wikipedia.org/wiki/Radiography

http://en.wikipedia.org/wiki/Ultrasonic_testing

http://en.wikipedia.org/wiki/Dye_penetrant_inspection

http://en.wikipedia.org/wiki/Magnetic_particle_inspection

http://en.wikipedia.org/wiki/Eddy-current_testing

http://en.wikipedia.org/wiki/Acoustic_emission

http://en.wikipedia.org/wiki/Thermography

https://www.asnt.org/Store/Browse?category=NDT%20Method%20References

http://www.ndt-ed.org/GeneralResources/MethodSummary/MethodSummary.htm

http://andts.com/common-ndt-methods/

http://www.astm.org/Standards/E1316.htm

http://www-pub.iaea.org/MTCD/publications/PDF/TCS-13.pdf

http://www.ndt.net/article/v04n05/rihar/rihar.htm

http://www.ndt.org/link.asp?ObjectID=50419

http://www.ndt.org/link.asp?ObjectID=3020

Feel free to ask for more info.

HT - Hindustan Times

DPT - DPT Vaccine

RT - Russia Today

Codes are just guidelines to ensure MINIMUM safety of the public from a catastophic component failure. Your client/consultant, Main contractor and sub-contractor need quality education from reputed universities currently available in the world before going for this kind of work.

Diesel mechanic

One golden joint with DPT at root run and 100% RT while hooking up the newly erected pressure piping is normally allowed but specifically is not found in codes.

It is more of contractual matter rather than looking for code to allow checking quality of work by the Owner or his Rep. There must be Articles in the Contract Agreement where it has been described Contractor's Right and Owner's Right. Owner always has upper hand regarding acceptance of Contractor's Work. I see no problem convincing Contractor that it is according to Agreement. One has to go through the General Condition of the Contract Agreement.

Closure welds ASME also named Golden Welds API

For me the reference on ASME B31.3 point 354.2.3 c, is very clear and a valid support for you.