Thread: Burst rating for 1/2 black pipe??.

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Originally Posted by jerry clayton

when pricing the copper remember that there are 2 grades---i think m and l---one of them is thicker than the other(and stronger)

Jerry - Actually there are three - K, L and M. If you need more then M, the cheapest then you really have some pressure:

1/2 actual OD=5/8, for drawn = 9840 psig for K, 7765 psig for L, 6135 psig for M (see page 28 of the ref below)

More info then you could want here: http://www.copper.org/publications/p...e_handbook.pdf