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Internal and External Coated Ductile Iron Pipe
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Types of internal coatings:
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| 1- Internal coating with cement covering |
| 2- Polyurethane |
| 3- Epoxy |
| Types of external coatings: |
| 1- Zinc |
| 2- Bitumen |
| 3- Polyethylene casing (for extremely corrosive grounds) |
| 4- Epoxy |
| 5- polyurethane |
Reference Standards:
ISO 2531 Ductile iron pipes, fittings, accessories and their joints for water or gas application
EN 545 Ductile iron, pipes, fittings, accessories and their joints for water pipelines - Requirements and test methods.
EN 598 Ductile iron pipes, fittings, accessories and their joints for sewerage application - Requirements and test methods
EN 877 Cast iron pipes and fittings, their joints and accessories for the evacuation of water from buildings - Requirements, test methods and quality assurance
EN 969 Ductile iron pipes, fittings accessories and their joints for gas pipelines - Requirements and test methods
BS 4772 Ductile iron pipes and fittings
EN 10928/DIN 2880 Ductile iron and steel pipes for sewage have to be lined with an inner sulphate resistant cement lining
EN 12842 Ductile iron fittings for PVC-U or PE piping systems - Requirements and test methods
ISO 7186 Ductile iron products for sewerage applications
ISO 8179 standard for zinc spraying Coating with metallic zinc which contains zinc at least 99.99%. The thickness of zinc coating is not less than 130g/m2
ISO 4179 standard for cement mortar lining
ISO 10803 Design method for ductile iron pipes;
ISO 1804 Restrained joint systems for ductile iron pipelines - Design rules and type testing.
ISO 16631 Ductile iron pipes, fittings, accessories and their joints compatible with plastic (PVC or PE) piping systems, for water applications and for plastic pipeline
connections, repair and replacement;
AS/NZS 2280 Ductile Iron Pipes and Fittings
