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Originally Posted by RAL's_pal?
All the deep pits in the Jersey's hull were clad welded long ago. A boiler is not that complicated of a mechanism. It's the things that work in conjunction with the boilers like the main feed pumps and fuel oil service pumps that needed a lot of maintenance as far as I can remember.
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the Jersey had B&W 600 psi controlled superheated boilers (saturated steam and superheated steam were fired separately) they were designed to burn black oil ( #6) which had to be heated to around 250 Deg. F to make it flow. In fact all steam propulsion boilers burned black oil, until the 70's when they converted them all to NSDFM, a High grade diesel fuel ( thats another story) Black oil was very cheap compared to diesel, so when the Jersey was re-commissioned they only operated half the boilers to cut down on fuel cost and man power. Boiler life was designed for 20-30 years but depeneding on how well ship forced maintained them, could be longer. If they didn't do a good job with water chemistry and follow lay up procedures correctly, then partial or complete tube replacement may be required. And as you say supporting Aux. machinery which is obsolet would be a problem for parts.