This Standard specifies requirements for round seamless copper and copper alloy heat exchanger tubes with outside diameters of 6.35 mm and above, supplied as straight lengths or U-bends.NOTES:1 For the purpose of this Standard, 'heat exchanger tube' includes tubes for use in condensers, evaporators, heaters and coolers. Supplementary requirements are included for material specified to comply with the requirements of AS/NZS 1200.2 Advice and recommendations on information to be supplied by the purchaser at the time of enquiry or order are contained in the purchasing guidelines set out in Appendix A.