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thickness of the pipe

Question asked by durdiak on Mar 29, 2017

If I connect a pipe coupling and the pipe (nominal size 40,50) to make a rolling groove can use the ducts of wall thickness of less than 3,4 mm (according Table A.6.3.2, SCHEDULE 10) or I have to go according to 6.3.2 *?

According to the NFPA 13.