API 553 Clause Interpretation

K

Thread Starter

Kaushal Shah

Hi,

I have posted below query to API forum too.

Unfortunately there is no reply, either affirmative or negative. Putting same query across this forum.
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Standard: API 553

Section: 3 Control Valves/ Sub Section 3.1 Valve Body

Clause: 3.1.9

Above clause states that, "The valve body size should be no less than two pipe size smaller than the line size. Smaller valve sizes must be reviewed to make sure that line mechanical integrity is not violated."


Query :

1. What is line mechanical integrity means ? Is there any laid down guidelines.

2. How to ensure that mechanical integrity is achieved ? Is there any standard referred.

3. How to demonstrate to third party, in case where control valve size is smaller than two line sizes?

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