AS 4822:2018 pdf free

AS 4822:2018 pdf free.External field joint coatings for steel pipelines
General industry practice is that external pipeline coatings be factory-applied except for field joints and other specific items, which are coated on site.Field joints shall be protected with a coating system that is compatible with the factory- applied pipe coating. The FJC shall provide similar performance to the factory-applied pipe coating and allow satisfactory application under the predicted field conditions.
The performance of field joint coatings is a critical part of the corrosion protection of steel pipelines. The field joint coating shall be carefully selected for each application, taking into account its importance in providing satisfactory corrosion protection for the service life under the construction and operating conditions of the pipeline.Rounding of numerical values shall be in accordance with AS 2706.
NOTES:
1 The FJCs described herein have different performance characteristics. The end user should decide on the FJC taking into consideration the factory-applied coating,the desired application and performance characteristics, including resistance to impact, reep,
indentation, cathodic disbondment, loss of adhesion, operating temperature and ageing.
2 Depending upon the type and complexity of FJC and size of project, the end user should consider the use of specialist FJC applicator companies to ensure consistent quality and production rates. Specialist applicators should be selected based on a verifiable successful record of the same FJC in a similar project environment.
The coating material shall include the following information:
(a) In the case of coatings proposed by the coating applicator company, information that provides evidence of suitability of the proposed coating for the required application.
(b) Production test certificates (batch certificates), as specified in this Standard, for the actual coating material, and any agreed optional requirements.
(c) Conditions for application of the coating materials (field joint and repair of FJC).
(d) Packaging, storage and safety requirements of coating materials.AS 4822 pdf free download.