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Whitephone
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Join Date: Jan 2010
Location: Mineral wells Tx
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Golden Welds

06/15/2011 3:08 AM

The so-called gold welds are those where the hydrostatic testing is not feasible. Anyone know where this name originated?. Do you are notified of any code, standard or rule that references?. A protocol test sequence used for this kind of weld?

Regards. WP
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Tornado
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#1

Re: GOLDEN WELDS

06/15/2011 3:33 AM

You may need to consult your local welding code regulations. For a weld of this type, you might need some combination of: 1) Closely specified procedure; 2) Certified welder(s) to perform it; 3) Some form of testing such as radiography, dye penetrant, ultrasonic, etc.; and 4) Other specifications.

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Whitephone
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#2
In reply to #1

Re: GOLDEN WELDS

06/15/2011 9:41 AM

Thanks Tornado. I´m looking for EN requieres. Regards
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stargan
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#3

Re: Golden Welds

06/16/2011 12:57 AM

A golden weld is a regular weld that has to be performed the same way as the other welds in this specific pipeline...the only difference is that it cannot be pressure tested so the NDT is more extensive.

For example: instead of 1 radiograph you have to add another NDT such as UT or MP.

This is how it is done with NG (Natural Gas) high pressure pipelines.

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Abdel Halim Galala
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Engineering Fields - Piping Design Engineering - New Member Egypt - Member - Member since 02/18/2007

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#4

Re: Golden Welds

06/16/2011 4:36 AM

• In pipeline and piping networks, the joints which you are not capable to carry out the hydrostatic test shall be tested by any other means like full RT, … etc. Those joints are generally referred as Golden Joints. These joints may come especially making tie-in's of for two hydro test of sections.

• So, we have to compensate hydrostatic test by any additional NDT as follows:

Option 1: Root 100% DPT, Every layer of weld with 100% DPT, Final run 100% DPT and 100 % UT. Option 2: Root 100% DPT and 100 % RT

• I think that there is no specific code for Golden Joint but most of the companies/workshops are follow to perform a Golden Weld, with 100% NDT in lieu of hydro test.

• We can refer ASME 31.4, and it permits a "waiver" of a hydrostatic test on tie-in welds between two sections of piping , that the weld has already undergone 100% NDT [see Para. 437.1.4 (b) Testing Tie-ins, ASME B31.4 - Ed. 2009].

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Whitephone
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#5
In reply to #4

Re: Golden Welds

06/16/2011 5:43 AM

Then these two options that you write can be the same for the closure welds specified in B31.3 parr.345.2.3 (c)


Thanks for the clarification,WP
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