NV C-21G Industrial Piping Practice Questions - Nevada C-21G Industrial Piping Contractor Examination Exam

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A C-21G crew finds a pair of 4-inch raised-face flanges 3/8 inch out of parallel. The correct way to close the joint is to:

Snug the bolts in a star pattern until the flanges spring together Correct the pipe fit-up (cut, reweld, or add a spool) so the flanges meet square, then tighten the bolts evenly Install a double-thick gasket and torque only two opposite bolts Heat one flange cherry-red and quench it to shrink the gap

Correct Answer:

Correct the pipe fit-up (cut, reweld, or add a spool) so the flanges meet square, then tighten the bolts evenly

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