On the piping diagram, what does BOP EL refer to: the bottom elevation of the outer diameter of the pipe or the inner bottom elevation?

2021-06-02View Original

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On the piping diagram, what does BOP EL refer to: the bottom elevation of the outer diameter of the pipe or the inner bottom elevation?

Reply #22021-06-02

Outer diameter bottom elevation: the design goal is to have a level bottom surface, allowing for proper placement of supports without the need for spacers or other structures to fill in any gaps. Inner diameter bottom elevation? The tolerance on the inner diameter is much larger than that on the outer diameter, and it’s also uneven with pits everywhere – so what’s the need for an inner diameter?

Reply #32021-06-02

BOP EL: elevation of the bottom of the pipe; TOP EL: elevation of the top of the pipe; EL: elevation of the center of the pipe; NEL: elevation of the pipe opening; PF EL: elevation of the platform; P EL: elevation of the point

Reply #42021-06-03

elevation of pipe bottom

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