DIN EN 12735-1:2010-12

This standard DIN EN 12735-1 specifies the requirements, sampling, test methods and conditions of delivery for seamless round copper tubes used for refrigeration and air-conditioning piping systems (that is piping, connections, repairs). It is applicable to tubes having an outside diameter from 3 mm up to and including 133 mm. These tubes are supplied in straight lengths in the material conditions hard or half-hard, or in coils in the annealed material condition. The standard DIN EN 12735-2 specifies the requirements, sampling, test methods and conditions of delivery for seamless round copper tubes, smooth or inner grooved, used for heat exchangers and their internal connecting pipes in the manufacturing of refrigeration and air conditioning equipment. It is applicable to tubes with an outer diameter from 6 mm up to and including 133 mm. The tubes are supplied in straight lengths in the material conditions hard or half-hard or as coils in the material condition annealed (soft). It is recommended that tubes manufactured to this standard are certified as conforming to the requirements of this standard. Certification should be based on continuing surveillance and be coupled with an assessment of a supplier's quality management against DIN EN ISO 9001. Suitable precautionary measures should be taken, if insulation materials are used, as these may damage the copper tube. The European Standards have been prepared by Technical Committee TC 133 "Copper and copper alloys" (secretariat: DIN). Regarding the German collaboration the responsible Working Committee is NA 066-02-03 AA "Kupferrohre (Installation und Industrie)" ("Copper tubes (installation and industrial)") of FNNE.