No, stainless steel wants to react or corrode more easy than other metals so additional measures should be taken as follows: For temperatures of up to 500oC, aluminium foil of not less than 0.06mm thick to be applied to the steel surface and arranged to shed water with overlaps of not less than 50mm at the joints. The aluminium foil provides a physical barrier to the ingress of water and provides galvanic protection. Full guidance should, of course, be obtained by examination of BS5970:2012 (Code of practice Thermal insulation of pipework, ductwork, associated equipment and other industrial installations in the temperature range of −100 °C to 870 °C) relating to austenitic stainless steel that is insulated with any type of insulation
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