Questions Pipeline

1. What is PH by the manufacturer?

2. No.

Opinions will not count in court.

So you better establish the correct design and test parameters using the usual sources.

What pipe line is it and to what standard has it to be build?

the pipe is OD 18" API 5L Gr X65 PSL 2, thk 0.625", by Asme B31.4

thanks

And what does PH stand for as per Lyns question?

Can you quote some ratings?

So far the question and information is not complete.

Is the insurance examiner's test report to hand?

1. Your terminology is too vague and/or incorrect to tell what the question is.
2. Probably not, but it depends on what you mean by "design pressure", which is not a well defined term.

No, you don't calculate the MAWP. Your periodic insurance inspection report states it. Look it up. That is what the document is for.

The value of a hydrostatic pressure test done on site can overcome the pressure of PH by the manufacturer?
If you are referring to the production test done by pipe manufactures , then yes. However we test above the pressure done on a welded pipe line by 110%. This detect any weak spots in the pipe.

White phone is dead on for this answer!

But he works in Pipeline so he has to be!

If he works IN the pipeline, won't his answers have that funny reverberating echo to them? I totally agree that the quoted ASME standard is the one to go by.

I know of at least pipeline ruined by using untreated high conductivity high total chlorine city water for a hydrostatic test. Not to the mention the damage to downstream turbine equipment. Sometimes what "they" don't know about water chemistry and mild steel can hurt "them".