Q&A
Oil resistance
When immersed in IRM903 oil at 100℃ for 168h according to ISO1817 test, the volume change rate of 4SP and 4SH type hose liner should be 0%~+60% (that is, no shrinkage is allowed).
When immersed in IRM903 oil at 70℃ for 168h according to ISO1817 test, the volume change rate of the outer coating of 4SP and 4SH hose should be 0%~+100 %, that is, no shrinkage is allowed).
When immersed in IRM903 oil at 121℃ for 168h according to ISO1817 test, the volume change rate of R12, R13 and R15 type hoses should be 0%~+100 % of the inner layer and 0%~+125% of the outer layer (i.e. no shrinkage).
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