Copper and copper alloys. Seamless, round tubes for air conditioning and refrigeration - Tubes for piping systems1 Scope This document specifies the requirements, sampling, test methods and conditions of delivery for seamless round copper and copper alloy tubes used for refrigeration and air conditioning piping systems (i. e. piping, connections and repairs). It is applicable to tubes with an outside diameter from 3 mm up to and including 219 mm. Tubes made of the copper grade Cu DHP are supplied in straight lengths in the material conditions hard or half hard,

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