I need to find where the ASME code says (in so many words) a relief device's set pressure cannot exceed the design pressure of a system's component with the lowest design pressure. Naturally, this is common sense, but it must be written somewhere. It should be in ASME Code Sect VIII, but it would help if someone had a citation from ASME B31.1 or B31.3, too.
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Relief Set Pressure Selection
Started by CuriousGeorge, Jul 28 2008 07:40 PM
4 replies to this topic
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#1
Posted 28 July 2008 - 07:40 PM
#2
Posted 28 July 2008 - 07:55 PM
I should add I am trying to protect a piping system, in this case. I have an expansion joint as my weakest link; hence, it de-rates the overall system by default. But, I really need something to cite...even if it appears in API as a best practice.
#3
Posted 29 July 2008 - 04:37 AM
CuriousGeorge,
API RP 520 PI - Ed 7 - Jan 2000 RP, section 3.5.2 and Figure 1—Pressure-Level Relationships for Pressure Relief Valves, may give you some guideline.
API RP 520 PI - Ed 7 - Jan 2000 RP, section 3.5.2 and Figure 1—Pressure-Level Relationships for Pressure Relief Valves, may give you some guideline.
#4
Posted 29 July 2008 - 05:03 AM
QUOTE (JoeWong @ Jul 29 2008, 05:37 AM) <{POST_SNAPBACK}>
CuriousGeorge,
API RP 520 PI - Ed 7 - Jan 2000 RP, section 3.5.2 and Figure 1—Pressure-Level Relationships for Pressure Relief Valves, may give you some guideline.
API RP 520 PI - Ed 7 - Jan 2000 RP, section 3.5.2 and Figure 1—Pressure-Level Relationships for Pressure Relief Valves, may give you some guideline.
Thanks! I was going to add that someone might know where I can find similar guidelines to cite, such as in an API Guideline or other industry accepted standard.
#5
Posted 29 July 2008 - 06:20 AM
Please see attached from B31.3
Regards
Regards
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