AS 1571:2020 pdf free.Copper – Seamless tubes for air- conditioning and refrigeration.
5 Form, temper and end sealing of tubes
5.1 Form
Tubes shall be supplied in straight lengths or coils.
5.2 Temper
Tubes in coil form shall be supplied as 0 temper. Tubes in straight lengths shall be supplied as 0, 1/2H or H temper.
The following letters and numbers are used to indicate the condition of the temper:
(a) 0 temper — fully softened condition (annealed).
(b) 1/2H temper — intermediate temper (half hard). This temper Is only applicable to tubes having nominal outside diameters up to 54 mm.
(c) H temper — as drawn (hard).
NOTE Other tempers and forms may be supplied.
5.3 End sealing
Tubes shall be either capped, plugged, crimped or otherwise packaged in order to maintain internal
cleanness under normal conditions of handling and storage.
6 Chemical composition
Tubes shall conform to the chemical composition requirements given in Tabici..
The chemical composition shall be determined by recognized chemical analysis methods of sufficient accuracy and reproducibility to meet the requirements of Table 1.
7 Freedom from defects
The finished tube shall be clean, smooth and free from defects detrimental to its subsequent processing and end use. The internal surface shall have a clean and bright appearance.
If, after acceptance of the tube, subsequent processing reveals that It contains manufacturing defects found to be detrimental, the tube shall be deemed not to conform to this document.
NOTE Defects referred to in this Clause cannot be completely quantified. Where the presence, size or frequency of any defect is considered to be of concern, an agreement should be made between the purchaser and the manufacturer. This agreement maybe achieved by acceptable type samples or methods of test.
8 Dimensions and tolerances
8.1 General
Tubes shall conform to the manufacturing tolerances specified in Clause 8.2.
The selection of the appropriate diameter and wall thickness combination for the working pressure of pipes shall conform to the design criteria specified in AS 4041.
NOTE 1 AS 4041 sets out minimum requirements for the materials, design, fabrication, testing, Inspection, reports and pre-commissioning of piping subject to internal pressure and applies to pipes carrying refrigerants.
NOTE 2 Appendix H shows the safe working pressure calculation and the design tensile stress at various operating temperatures for copper.
NOTE 3 A list of commonly available products is shown in Appendix C.
8.2 Manufacturing tolerances
8.2.1 Mean outside diameter
For tubes in all tempers either coiled or in straight lengths, the mean outside diameter shall not vary from the specified diameter by more than the tolerances specified in Table 2.AS 1571 pdf download.