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AS 4321:2025 specifies requirements for factory-applied fusion-bonded medium-density polyethylene coating and lining of pipes and fittings, for protection against corrosion
| Committee | WS-009 |
| DocumentType | Standard |
| ISBN | 978 1 76175 163 9 |
| Pages | 41 |
| PublisherName | Standards Australia |
| Status | Current |
| Supersedes | AS 4321-2001 |
Originated as AS 4321-1995.
Previous edition 2001.
Reconfirmed 2019.
Third edition 2025.