The system is normally intended for the conveyance of fluids under pressure. The chemical composition of steel casting for the manufacture of pipes and the mechanical characteristics of the tubes measured at room temperature (23 ° C). UNI 8863: Seamless pipes and welded non-alloy steel, threadable according to UNI ISO 7/1. ISO 6957-DIN 50916-1 "Test Of Resistance To Corrosion."
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