AS NZS 2280 pdf download

AS NZS 2280 pdf download,Ductile iron pipes and fttings
1.1  Scope
This Standard specifies requirements for ductile iron pressure pipes centrifugally cast in moulds, and ductile iron fittings of nominal sizes up to and including DN 750. NOTE 1  Ductile iron is also known as spheroidal graphite iron, SG iron or nodular graphite iron. The specified pipes and fittings are intended primarily for conveying water under pressure, but may be used for conveying sewage or other liquids. Fittings covered by this Standard are intended primarily for use with water supply pressure pipes. NOTE 2  Fittings are also used in non-metallic pipeline systems. NOTE 3  Fittings may also be used with pressure pipes of alternative outside diameters by the adoption of compatible sockets or utilization of compensating elastomeric seals, provided the joint meets the performance requirements of this Standard. Ductile iron spigots should not be inserted into plastic pipe sockets. This Standard specifies pressure classifications of pipe on the basis of the allowable operating pressure (AOP); however, Flange Class (FLCL) pipe has been specified for manufacture of flanged pipe with screw-on flanges.
1.3  Terms and definitions
For the purpose of this Standard, the terms and definitions given in AS/NZS 3500.0 and those below apply. 1.3.1 allowable operating pressure AOP allowable internal pressure, excluding surge, that a component can safely withstand in service 1.3.2 allowable site test pressure ASTP maximum pressure applied on site in a newly installed pipeline, which includes a safety factor and allowances for surge 1.3.3 coating corrosion-control barrier applied to the external surface of a pipe or fitting 1.3.4 effective length overall length of a pipe or fitting measured along its centre-line, excluding the depth of any sockets 1.3.5 egg-shelling polygonal surface pattern on cement mortar lining resembling the crazing effect exhibited by the shell of an egg with multiple fractures 1.3.6 entry depth required distance past the seal that a pipe is inserted in a socket to provide satisfactory sealing 1.3.7 fettling cleaning of castings, removal of fins, gates and similar superfluous material by chipping, grinding or other mechanical means 1.3.8 flanged pipe pipe manufactured in accordance with this Standard having a flange (conforming to AS/NZS 4087:2011) attached to one or both ends by welding, threaded connection or other suitable means 1.3.9 laitance chalky surface layer composed of finer fractions of mortar, which can readily be removed from the lining by scraping with a blade after the lining has cured Note 1 to entry: Laitance does not include the cement-rich layer, which is an integral part of the lining and cannot be easily removed. 1.3.10 lining corrosion-preventing barrier applied to the internal surface of a pipe or fitting 1.3.11 maximum allowable operating pressure MAOP maximum internal pressure, including surge, that a component can safely withstand in service 1.3.12 mortar cement mortar consisting of cement, aggregates and water 1.3.13 ovality out of roundness difference between the maximum outside diameter and the minimum outside diameter, measured in the same cross-section 1.3.14 pressure classification a classification of pipes, fittings and flanged pipe by a PN number based on the allowable operating pressure (AOP) expressed in megapascals Note 1 to entry: PN = 10 × AOP. 1.3.15 seal coat coating applied over a cement mortar lining to control the interactions between the lining and the contents of the pipe or fitting 1.3.16 shall indicates that a statement is mandatory 1.5  Product conformity evaluation to this Standard Product conformity to this Australian Standard shall be evaluated in accordance with Appendix A. NOTE  The information that should be supplied by the purchaser, or by the manufacturer, is given in the purchasing guidelines set out in Appendix B. 1.6  Pressure classification 1.6.1  General Pipes, fittings and flanged pipe shall be classified by rated pressure in accordance with Clauses 1.6.2, 1.6.3 and 1.6.4, as applicable. The pressure classification of pipes, fittings and flanged pipe shall be by PN number, except for Flange Class (FLCL) pipe. 1.6.2  Pipe Ductile iron pipe shall be classified by a PN number, based on the AOP.