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What is the meaning of corrosion resistance ratios, (CRR)?

April 26, 2017Corrosion crr ratios resistance

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What is the meaning of corrosion resistance ratios, (CRR)?

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CRR is a factoring system developed by UL to compare the thinnest point of Threaded Schedule-40 to that of other types of pipe/joint combinations. The wall thickness ratio implies relative life-span of the pipes at the joints. Typically, any roll grooved or weld joint has a better CRR factor than the same size joint of threaded Schedule-40 pipe.