HYDROSTATIC TEST PRESSURE FOR PIPING
HYDROSTATIC TEST PRESSURE FOR PIPING
(OP)
I'm looking for the code about hydrostatic test pressure for piping. As I've found, the latest version is "ASME B31.3 PIPING GUIDE (2004)". And according to this code, the hydrostatic test pressure for piping is "1.5 x DESIGN PRESSURE x St/Sd".
But my team manager told me there's a new standard which hydrostatic test pressure for piping is "1.2 x DESIGN PRESSURE".
Have you ever heard about this latest standard?
I can't find about this anywhere.
I'll wait your kind answer, Thx~!
But my team manager told me there's a new standard which hydrostatic test pressure for piping is "1.2 x DESIGN PRESSURE".
Have you ever heard about this latest standard?
I can't find about this anywhere.
I'll wait your kind answer, Thx~!





RE: HYDROSTATIC TEST PRESSURE FOR PIPING
RE: HYDROSTATIC TEST PRESSURE FOR PIPING
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"Pumping accounts for 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: HYDROSTATIC TEST PRESSURE FOR PIPING
David
RE: HYDROSTATIC TEST PRESSURE FOR PIPING
RE: HYDROSTATIC TEST PRESSURE FOR PIPING
'Someone' is always trying to do tests the simplest way, with lowest possible test criteria.
'Someone else' is always responsible for the the safety and risk of the total finished installation (including economical risk if anything goes wrong) and is also the decision maker for wich standards and test limits to utilize.
Advice: Try to identify 'someone else' and ask.
RE: HYDROSTATIC TEST PRESSURE FOR PIPING
And I have one more question to zdas04.
I already read ASME B31.8 but it's about pressure vessels.
Not for pipings.
Isn't it?
Is there something I misunderstand?
RE: HYDROSTATIC TEST PRESSURE FOR PIPING
We've had many discussions over the years about whether Gas Gathering comes under B31.8 or under some other code. Section 802.11 (Scope) says "This Code covers the design, fabrication, installation, inspection, and testing of pipeline facilities used for the transportation of gas." Section 802.12 (exclusiong) (f) "Wellhead assemblies, including control valves, flow lines between wellhead and trap or separator ..." Which seems to imply that B31.8 covers upstream piping after the wellsite separator. The big question is what code applies between a wellhead and a separator? No one knows, but some companies say it is B31.3, some say "we've got to use something, so we'll apply B31.8 even though it is explicitly excluded". Bottom line is that you need to make a decision about design standards and document it.
David
RE: HYDROSTATIC TEST PRESSURE FOR PIPING
http:/
**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: HYDROSTATIC TEST PRESSURE FOR PIPING
RE: HYDROSTATIC TEST PRESSURE FOR PIPING
There's just no avoiding having to put some thought into decisions when there's oil, gas, steam, and chemicals involved.
Edward L. Klein
Pipe Stress Engineer
Houston, Texas
"All the world is a Spring"
All opinions expressed here are my own and not my company's.
RE: HYDROSTATIC TEST PRESSURE FOR PIPING
**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: HYDROSTATIC TEST PRESSURE FOR PIPING
I find that standardization is almost never worth much. I once built 8 miles of 20-inch with yard-sale pipe (6 different wall thickness and 4 different coating systems in 8 miles), and got gas flowing a year sooner than waiting for a mill run for half the cost. If I had been locked into a "standard" then we would have had to forgo the benefit ($60k/day) for a year. Every plant I've ever visited was built based on best available technology at the time the plant was designed--should industry forgo advances in technology for the sake of "standards"? I say that any business that does that (e.g., builds a gas plant based on 1900 technology in 2009) does not have a chance in hell of competing and should quietly just go out of business.
David
RE: HYDROSTATIC TEST PRESSURE FOR PIPING
The BTC (1750 miles of 42") pipeline has 9 different wall thicknesses.
**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: HYDROSTATIC TEST PRESSURE FOR PIPING
As Hydrotest is generally room temperature only but chk this with ur boss may be he is suggesting you for difference in test temperature and design temperature.
Sachin
RE: HYDROSTATIC TEST PRESSURE FOR PIPING
My warning was for SeanB - if you do intend to test a system to the flange rating, you'd better make sure all the components in the spec can handle it.
Edward L. Klein
Pipe Stress Engineer
Houston, Texas
"All the world is a Spring"
All opinions expressed here are my own and not my company's.
RE: HYDROSTATIC TEST PRESSURE FOR PIPING
**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: HYDROSTATIC TEST PRESSURE FOR PIPING
**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/