golden weld

[Piping Hydro]

Dears,

Is it possible to create "golden weld" for internal coating pipeline after hydrostatic testing, and what's the technique used for coating "golden weld" ?

note: we have main pipeline 20" and two branches 12" , where each pipeline will be hydrostatic tested separately and then two branches will be connected the main pipeline after hydrostatic test "golden weld"

thanks in advance

 

[pennpiper]

First you have to understand the meaning of "Golden Weld"

What is meant by "golden joints"?
From:

https://www.quora.com/What-is-meant-by-golden-joints

Aaron Rose
Aaron Rose, AWS Certified Welding Inspector and Union Welding Instructor.
Answered Jul 13, 2016

A "golden joint" refers to a weld joint that is usually the final weld connecting existing piping to new piping and the joint will not be pressure tested. Since the weld joint will not be pressure tested, NDE is performed in lieu of pressure test. Many owners only want the best welders to weld these joints because NDE is not nearly as good of a test method as hydrostatic or pneumatic pressure testing.

Can you comply with this?

Sometimes its possible to do all the right things and still get bad results

 

[Piping Hydro]

thanks Pennpiper

I meant, Is there a solution for internal coating of golden weld or I try to get another way to hydrotest the branches with main pipeline to overcome the problem of internal coating of golden weld .

 

[LittleInch]

What is the internal coating? Very few internal coatings can withstand welding.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Piping Hydro]

internal coating for golden weld joint

 

[KevinNZ]

You may have make the location of the weld a lift out spool. Completed the weld then take out the spool to complete the internal coating then refit the spool

 

[pmover]

is it possible to use a a short pup w/ flanges? the pipeline and short pup can be internally coated and then install the pup.
yes, more $ and time. but an alternative consideration.

 

[canadapipe]

Depending on the coating type there are internal sleeves that can be used to have internal coating which will allow welding.

I've the following in the past,
"Thru-Kote U.B™ sleeve is an unbelled connection system for 2" - 42" line pipe designed to protect internal coatings during welding" (

https://www.nov.com/Segments/Wellbo..._Connection_Systems/Thru_Kote/Thru-Kote.aspx)

 

[Ehzin]

Clarify on what internal coating you have on the rest of the pipe.

Thanks,
Ehzin

 

[canadapipe]

The rest of the pipe was coated with Tuboscpoe TK-69.