Originally Posted by sglide
:chiefwoohaw: :chiefwoohaw: :chiefwoohaw: :chiefwoohaw:
Cellulosic covered electrodes may still be used if care is taken in controlling preheat and interpass temperatures, with pipe wall thickness up to and including 10mm on X-80. It is not currently advisable to attempt to weld on thickness greater than 10mm because increased restraint and cooling rates are expected to increase the risk of weld metal hydrogen cracking. Low hydrogen vertical-up electrodes are not normally used for transmission pipeline production welds, due to the low productivity.
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