The external surface of the Soil pipes are coated to 40 microns but this is only considered a primary coat under the provisions of BS EN 877. This coating requires over coating with a high quality, paint suitable for outdoor use on metallic surfaces when used in an external situation. This is essential to provide an adequate level of protection for the system. It is important to note that regular inspection and re-coating of the products may be necessary.
The internal surface has an average coating thickness of 130 microns. This enables the Halifax Soil pipes to withstand a variety of tests designed to reproduce the conditions that the products will encounter in their working life. This includes a 350 hour salt-spray test, a 30-day waste water test at 23˚C and a 30-day chemical resistance test at both PH 2 (very acidic) and PH12 (very alkaline).
Halifax Soil Fittings
Halifax Soil fittings are finished internally and externally with an average 70 microns of red 2-pack epoxy paint.
This paint has passed the same rigorous testing to which the pipes have been subjected including a 24 Hr hot water test at 95˚C, material hardness tests, tensile tests and a 1500 cycles water temperature test between 15˚C and 93˚C.
Halifax Drain Pipes
The external surface of the Drain pipes are coated to 170 microns. This coating is thicker than is used on the Halifax Soil pipes as it is designed to protect against the more aggressive conditions which may be experienced when the pipes are buried. The internal surface has an average coating thickness of 130 microns. This enables the Halifax Drain pipes to withstand a variety of tests designed to reproduce the conditions that the products will encounter in their working life. This includes a ring-crush strength test, a 30-day chemical resistance test at both pH 2 and pH 12 and a 1500 cycles water temperature test between 15˚C and 93˚C.
Halifax Drain Fittings
Halifax Drain fittings are finished externally with 150 microns of grey 2-pack epoxy paint. The increase in paint thickness over the Halifax Soil is due to the more stringent requirements for external coating performance for below ground products.
The Halifax Drain fittings are coated in either red or grey 2-pack epoxy to a thickness of 150 microns. This paint has also been subjected to the same stringent testing regime as the other components of the system. These tests include a 350 hour salt-spray test, a 30-day waste water test at 23˚C and a series of dimensional checks
Note: The internal epoxy coated surfaces are very smooth. This gives the added bonus of helping to prevent turbulence within the pipes thereby increasing flow rates.
Chemical resistance of coatings
The internal coatings of the Halifax Soil and Drain system have been developed to meet the requirements of BS EN 877, which requires coatings to withstand temperatures of 95C, cyclic temperatures from 15C to 93C, waste water at 23C and chemical resistance from pH 2 (sulphuric acid) to pH12 (Sodium Hydroxide): as such our coatings can handle an array of chemicals and pH values (within the tested range) found in most waste water. The biggest issue facing soil and drainage systems is what is being discharged from households, commercial and industrial premises. These range from surfactants and soaps to highly concentrated acidic and alkaline solutions.
For more information about cleaning products and their pH levels please see our full Submittal Document.