when to follow ASTM A530 for hydrotest pressure calculations. 4

[bck2ftr]

In general for process piping ASME B31.3 is used for calculation of Hydrotest pressure.
Today I came across ASTM A530, which also specifies as
"each length of
pipe shall be tested by the manufacturer to a hydrostatic
pressure which will produce in the pipe wall a stress not less
that 60 % of the minimum specified yield strength for carbon
and ferritic alloy steel pipe, or 50 % of the specified minimum
yield strength for austenitic alloy steel pipe."

Can anyone clarify when to go for ASTM A530 method for a hydrotest?

 

[LittleInch]

ASTM A530 ( and just about any ASTM AXXX) is a pipe material standard. This includes a minimum test on the pipe after manufacture as part of the manufacturing process, commonly called "mill tests". It provides a very basic level of assurance that your pipe has been manufactured properly. You should therefore have few worries about the quality and integrity of your pipe.

B31.3 is a fabrication standard where various bits, including pipe, get joined together to form a system. This system is then hydrotested to prove its integrity after it has been fabricated. The code provides minimum requirements for the testing of this system which may or may not exceed the test level performed by the pipe vendor depending on the design pressure of the system.

The two should not be confused with each other.

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way

 

[zdas04]

Good explanation LI.

David Simpson, PE
MuleShoe Engineering

In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. —Galileo Galilei, Italian Physicist

 

[bck2ftr]

LittleInch, Thank you for the clarification

 

[LittleInch]

Thanks

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way