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% XRAY and Liquid Penetrant on pipe according to ASME B31.3

% XRAY and Liquid Penetrant on pipe according to ASME B31.3

% XRAY and Liquid Penetrant on pipe according to ASME B31.3

(OP)
Hi!!

I´m searching in ASME B31.3 something about how much of liquid penentrants and XRAY must be done at least on pipe lines.

I have two services: one of natural gas (10 psig and 70°F and 1"Ø) and other for steam (260 psig and 350°C)

According to ASME B31.3, each XRAY and liquid penetrants (%) depends on type of service (if it is normal, M, high pressure, etc). .... or Am i Wrong?

If that is, for gas pipe line and also for steam line is 100% xray and 100% liquid penetrant but I think I´m getting something wrong.

What do you think?

Thxs!!!

RE: % XRAY and Liquid Penetrant on pipe according to ASME B31.3

Maybe you're looking at the wrong code.  ASME B31.4 and .8 for pipelines give testing % requirements.  Then see API 1104 for test criteria themselves.

Only put off until tomorrow what you are willing to die having left undone. - Pablo Picasso

RE: % XRAY and Liquid Penetrant on pipe according to ASME B31.3

Refer to section 341.4.

 

RE: % XRAY and Liquid Penetrant on pipe according to ASME B31.3

I think what you are looking for can be found in:

341.4 Extent of Required Examination

It's around page 78. There are sections for Normal Fluid Service, Category D fluid service and Elevated Temperature Fluid Service.

Category M examination requirements can be found in M341 EXAMINATION. Around page 109.

You are correct, each fluid service has varying levels of examination required, ie 20% random radiography/ultra sonic for one but only 5% for another.

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