There is no minimum length of underground pipeline that will specify a use of Dead weight tester. A dead weight tester is the most accurate pressure sensing equipment depending on the condition of weights.
Always be a Student
Thanks for your input.
Flange was cut out to change the end connection to Welded end. A drawing showing the dimensions was provided which meets the dimensional requirements and the valve was tested as per API 6D requirements post modification. Liquid penetrant test was done on the machined...
Can a supplier change the end connection on a valve? without consent from OEM?
I have a 8" Grove valve whose MTR's say it is WE X RF from OEM, where as the actual valve is WE X WE , the supplier says flanged end was cut off and machined to make it a WE, so my question is does this affect the...
BI and LI
We are only required to have the pressure and temperature(pipe and ambient) charts for the duration of the test.
I dont have a volume chart, however we know how much volume was bled during the 3 hours of continuous bleed, we do not know what rate it was bled at.(Rate at which the...
In this case, it is only required to be tested to 4 hours since this is an above ground assembly. During this period you are not allowed to have leaks and all pressure variations should be accounted for using PVT calcs(Acceptance criteria).
I am not sure as to why a 4 hour above ground test is...
Strength tests are determined to be successful if no pipe ruptures or leaks occur as per the established
acceptance criteria.
- API RP 1110
It doesn't fit our common sense definition of a proper hydro test, so basically it fails.- Exactly same thoughts but i need something in writing in code...
Thanks for your input, I would not disagree with you.
But I am intrigued by Mr. Biginch statement, guess we'd have to wait for his engineering explanation.
Always be a Student
Anyone? I guess Mr.Biginch is busy. I could not locate verbiage verifying his statement on either codes B31.8 and B31.4.
If we have the volume bled, we could perform PVT calculations and determine that there were no other leaks apart from the continuous bleed.
IF we do not have the volume bled...
@Biginch
http://www.eng-tips.com/viewthread.cfm?qid=369443
In this thread you mentioned above ground test for B31.8 piping is not to see for leaks, it is to verify strength.
I have a follow up question on this,
IF a test is done under B31.4 above ground for a manifold with many diameters...
