AS/NZS 2280:2020 pdf free.Ductile iron pipes and fittings.
2.1 Ductile iron
2.1.1 Properties
Processed metal, from which the pipes and fittings (including flanges and puddle flanges for flanged pipe) are manufactured, shall be ductile iron conforming to the requirements of Clauses 2.1.2 to 2.1.4.
NOTE After withdrawal from the moulds, pipes and fittings may require heat treatment to achieve conformance with Clauses 2.1.2 to 2J..4.
2.1.2 Tensile properties
2.1.2.1 Pipes
Pipes shall be tested in accordance with AS 1391 and Appendix C. The tensile properties of the ductile iron shall be as follows:
(a) Minimum tensile strength of 420 MPa.
(b) Minimum elongation of 10 %.
2.1.2.2 Fittings (including flanges and puddle flanges for flanged pipe)
Fittings, including flanges and puddle flanges for flanged pipe, shall be tested in accordance with AS 1391 and Appendix C.
The tensile properties of the ductile iron shall be as follows:
(a) Minimum tensile strength of 400 MPa.
(b) Minimum elongation of 10 %.
2.1.3 Hardness
2.1.3.1 Pipes
Pipes shall be tested in accordance with AS 1816.1 and Appendix C. The Brinell hardness of the ductile iron shall not exceed 230 HB.
2.1.3.2 Fittings (including flanges and puddle flanges for flanged pipe)
Fittings, including flanges and puddle flanges for flanged pipe, shall be tested in accordance with AS 1816.1 and Appendix C. The Brinell hardness of the ductile iron shall not exceed 250 HB.
2.1.4 Microstructure
Pipes and fittings shall be tested in accordance with the metallographic procedures of AS 1831. The microstructure of the ductile iron shall have a nodularity of 75% (mm.) Form V and Form VI.
2.1.5 Mode of pipe casting
Pipes shall be cast in moulds by means of a centrifugal casting process.
2.1.6 Finish
Small surface imperfections, inseparable from the method of manufacture and not detrimental to the functional quality of the castings, shall be accepted, provided conformance with all requirements of this Standard is maintained.
Minor surface defects may be rectified by fettling, provided conformance with all requirements of this Standard is maintained.
Cracks and tears in the metal shall not be repaired.
2.2 Contact with drinking and recycled water
All products, including pipe and fittings end coatings and linings, seals and gaskets that are intended for contact with drinking and recycled water shall conform to AS/NZS 4020, The scaling factor shall be as follows:
(a) For pipe linings — 1.
(b) For fitting linings (i.e. for fittings comprising not more than 5 % of the total pipeline
length) — 0.05.
(c) For pipe end coatings and linings in contact with drinking water (i.e. the total length of the end coating and lining on a pipe comprises not more than 5 % of the pipe length) — 0.05.
2.3 Preparation of pipes and fittings for coatings and linings
All surfaces of pipes and fittings to be coated and lined shall be clean, dry and free from rust at the time of application. Internal surfaces are not required to be dry for cement mortar lining.
2.4 Coatings
2.4.1 General
Where a coating is specified, it shall be in accordance with Clause 2.4.2 for pipes and Clause 2.4.3 for fittings.
NOTE Other coating systems for pipes and fittings may be specified by the purchaser. The availability of coating systems should be checked with the manufacturer.
2.4.2 Pipe coatings
A metallic zinc coating shall be applied in accordance with ISO 8179-1. The mean mass of zinc coating shall be not less than 200 g/m2 with a local minimum of not less than 180 g/m2.
A finishing liquid-applied coating shall be applied to metal spray coatings at a minimum coating thickness of 80 urn. The finishing coating shall have an adhesion rating of not greater than 2 when tested to AS 1580.408.4.
NOTE Polyurethane coatings meeting the requirements of EN 15189 may be applied as an alternative to metal spray coatings by agreement between the purchaser and supplier.
2.4.3 Fitting coatings
‘l’hermal-honded polymeric coatings on fittings shall he in accordance with AS/NZS 4158.AS/NZS 2280 pdf download.