"CorKoat" coating is a Permanent Solution of Pipe corrosion used for buried or submerged pipelines. ‘’CorKoat” coated steel pipes have excellent long term corrosion resistance & very good resistance to cathodic disbondment.
It has good anti-corrosion and thermal insulation performance, the heat loss is only 25% of the traditional pipe. It does not need a trench, can be directly buried underground or construction is simple and rapid, the comprehensive cost is relatively low. It has good corrosion resistance and impact resistance under the low-temperature condition also.
Mainly “CorKoat” coating is 3-Layer Polyethylene (3LPE) is a multilayer coating composed of three functional components: A high-performance Fusion Bonded Epoxy(FBE) primer, followed by a copolymer adhesive and an outer layer of polyethylene which provides tough, durable protection.
Pipe and components go through abrasive blast cleaned to match cleanliness degree to Sa 2 ½ . The blast cleaned surface shall have roughness Rz between 40 Micron to 90 Micron. After blast cleaning, the surface of the pipe shall be inspected.
Before starting 3 LPE coating pipe has been heated to temperature 150 - 220 Degree C so all moisture content inside pipe surface remove completely
Immediately after abrasive blast and heating the layer of epoxy (resin of powder) applied. The minimum thickness can be in between of 100 to 150 Microns. Thickness can be increased based on customer requirement.
A polymer intended to provide adhesion between layer-1 and layer-3 and be compatible with those layers shall form this layer. The minimum thickness shall be between 150 to 200 microns depending on the type of adhesive and application. The thickness may be subject to agreement by the customer and confirm to manufactures recommendations.
Polyethylene coating applied in this layer just after Adhesive coating layer. The thickness shall be uniform and the minimum thickness shall be as per DIN30670.
To Cool down temperature after coating, pipe has to travel from a cooling bath section where chilled water is applied to bring pipe temperature down and harden the three coated layers.
The length of the cut back shall be 100 MM +/- 20 mm.
Required testing as per approved quality plan will be carried out prior to dispatch.
After markings over coated pipe like pipe manufacturer name, brand name etc as per standard, pipe will be dispatched.
CorKoat is a 3 layer polyethylene coat that offers protection from corrosion and excellent flow quality. Coating the pipes with Corkoat makes the pipes corrosion resistant and offers minimum resistance to the material flow. We coat both inner side and outer side of steel pipes as per the customer requirements, to deliver totally safe pipes that can be used for a variety of applications.
Transporting Gas, Oil,
and other fluids:
This pipe coated with Corkoat can withstand temperatures till 80 degrees centigrade and environments ranging from dry desert to regions under the water.
Drinking water transportation, etc.
When soil salt content is high, the corrosion is very likely. CorKoat coated pipes are the right solution for such an application.
Cross country pipeline for CNG, LPG, water, drainage, effluents, etc.
Internal pipeline for fluid transfer.
Offers highest resistance to corrosion from chemical or any other medium. This coating prevents any damage to the steel pipes due to corrosion.
Resistance to cathodic disbondment.
Polyethylene coat on the external surface prevents any physical damages to either the pipes or the fusion bonded epoxy during transport or handling.
The 3LPE coat gives the pipes an extended life cycle along with high performance characteristics.
We supply 3LPE pipes ranging from 3 inches to 18 inches in diameter. Coating can be done over any kind of metallic pipe such as
- CS seamless pipes
- MS pipes
- G.I. pipes
- SS pipes