This Appraisal covers a range of ductile iron spigot-socket cement lined pipes manufactured to AS/NZS 2280:2020 in sizes DN 100 to DN 750 and pressure classes PN 20, PN 35 and flange class. Issue 3 was a replacement for the previous version of the appraisal which had reached its 5-year expiry date. This Issue 4 is to close out a future work requirement to submit updated AS/NZS 4020 test reports for the black and blue finishing coatings utilised on LINX and ZAP pipes respectively. Details of the coatings have also been clarified.
LINX is the brand name for zinc coated pipe and is offered with either general purpose Portland cement linings (LINX-GP), for transport of drinking or non-drinking water, or high alumina cement linings (LINX-HAC), for transport of sewerage and aggressive water with pH >4<12. LINX-GP is offered with a seal coating option.
ZAP is the brand name for pipe coated with a zinc-aluminium alloy and is offered with the same lining options as LINX. The application of metallic Zinc-Aluminium alloy coatings may enhance the external corrosion protection of the coating in some buried applications. Vinidex recommends the commissioning of a thorough soil survey and corrosion analysis by a competent corrosion specialist before installing pipes without PE sleeving.
The effective length of the pipes is 5.7 m and the socket seal design is T-type.