I have one 12" pipe with MOV on the pipe. The MOV is at higher elevation i.e around 3 meter height. Do i need to give access platform for this. I think for MOV platform is not required.
Ask yourself: If the motor fails, can I wait two days to get the scaffolding built before I try to operate the valve manually or repair it? Your answer answers your question.
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If you can't explain it simply, you don't understand it well enough. (A.E.)