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Up Topic Welding Industry / Inspection & Qualification / Hydro testing
- - By firstpass (**) Date 07-23-2003 23:06
Each code within the ASME such as 31.3 31.1 31.8 has testing requirements for hydro . Is there a specific publication that deals with hydro testing procedures. ETC. calibration of gage,range of gage. high point vents, testing medium, temperature. Thanks for any help
Parent - By - Date 07-24-2003 05:25
You can try ASTM E 1003:1995. It's not very detailed, however. I have found that the specific code requiring hydrostatic testing (e.g. B31.1) is more detailed.
Parent - By chall (***) Date 07-24-2003 18:22
It is good advice to get the specifics from the applicable code of construction. One reason: The gage range varies from code to code. In one code it may be acceptable to use a gage with a range 5 times the test pressure. In another it may specify 2 to 3 times the test pressure is the maximum range.

It is far better to discover that tid-bit on your own (say, when you are preparing for a hydro) than it is for the AI to discover it while you are getting ready to pressurize....You are probably wondering how I know it would be better......come to think of it, you probably aren't wondering...

Charles Hall
Parent - By G.S.Crisi (****) Date 08-08-2003 13:20
The Codes you mention, as well as other standards, state the MINIMUM requirements that are to be followed when performing a hydro test. They don't go down to details like those you mention. These details should be set forth, or figured out, by whoever actually carries out the test.
Sure, there's some written material regarding this. Many engineering firms, for example, have their own specifications detailing exactly how the test must be performed. Problem is that this material is handed to their clients and it's not sold to the public. Large companies as DuPont, Dow and others also have their own specifications. Again, problem is that those specs. are intended for internal use and aren't disclosed to others.
The Codes you're speaking of are for piping. There must be some good book on piping systems in the U.S. that may help you. From memory, I remember the "Design of Piping Systems" by M. W. Kellogg and the "Piping Handbok" by S. Crocker. Sure, they're old, some 30 years or more, but hydrostatic tests havn't change that much over the years.
A good engineering library should have them.
Giovanni S. Crisi
Sao Paulo - Brazil

Up Topic Welding Industry / Inspection & Qualification / Hydro testing

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