Insulation issues with austenitic stainless steel
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For low-temperature applications, where the piping is made of austenitic stainless steel, what are the requirements regarding the oxygen index, chloride content, and pH value of the insulation material? What specifications can be seen?
We don’t seem to be that particular about it. .
Chloride ions are the main concern; for austenitic stainless steel, it should be below 25 ppm!
GBT 17393 covers the specifications for insulating materials used on austenitic stainless steel. GBT 50185 is the acceptance criteria for the construction quality of insulation work on industrial equipment and pipelines (draft for comments). GBT 50126 specifies the construction standards for insulation work on industrial equipment and pipelines. Insulating materials that come into contact with the surface of austenitic stainless steel must have chloride, fluoride, silicate, and sodium ion contents that comply with the relevant provisions of the current standard GB/T 17393, which outlines the specifications for insulating materials used on austenitic stainless steel. Inspection method: Check the quality certificate of the materials and the performance test reports from on-site sampling.