1.1 This standard applies to copper tube suitable for connection by means of compression fittings or by bronze or autogenous welding. Tubes are normally supplied in random straight lengths in the half-hard condition but tubes of 15 mm and 20 mm nominal bore may be supplied in coil form in the fully annealed condition.
1.2 Maximum working pressures at temperatures up to 65 °C, calculated in accordance with the following formula are given in table 1, based on a stress value F = 60 MPa:
p = 2 Ft/D-t
where P = pressure (MPa)
F = stress (MPa)
t = thickness (mm)
D = outside diameter (mm) If tubes are annealed, then the maximum working pressures should be recalculated using a stress value F = 46 MPa.
1.3 Where any other standard named in this standard has been declared or endorsed in terms of the Standards Act 1965, then -
(a) Reference to the named standard shall be taken to include any current amendments declared or endorsed in terms of the Standards Act 1965; or
(b) Reference to the named standard shall be read as reference to any standard currently declared or endorsed in terms of the Standards Act 1965 as superseding the named standard, including any current amendments to the superseding standard declared or endorsed in terms of the Standards Act 1965 -
as appropriate.
NOTE - The date at which amendments or superseding standards are regarded as "current" is a matter of law depending upon the particular method by which this standard becomes legally enforcible in the case concerned. In general, if this is by contract the relevant date is the date on which the contract is created, but if it is by Act, Regulation, or bylaw then the relevant date is that on which the Act, Regulation, or bylaw is promulgated; for bylaws, promulgation includes updating by the procedure set out in MP 3801, A guide to the adoption of the model building bylaw (NZS 1900) by local authorities using the standard adoption and annual updating procedures.
NZS 3501:1976 history
1976NZS 3501:1976 COPPER TUBES for Water, Gas, and Sanitation Metric Units (Incorporating Amendment 1 thru 3; Supersedes NZS 1755)