Coated steel pipe is a type of steel pipe that has a protective layer of coating applied to its surface. This coating is typically made of materials such as polyethylene, epoxy, or zinc, and is designed to protect the steel pipe from corrosion and damage caused by exposure to the elements.
Coated steel pipes are commonly used in a variety of applications, including water and wastewater systems, oil and gas pipelines, and industrial piping systems. The coating helps to extend the lifespan of the steel pipe, reducing the need for maintenance and replacement over time.
There are several different types of coatings that can be applied to steel pipes, each with its own unique properties and advantages. For example, polyethylene coatings are known for their excellent resistance to chemicals and abrasion, while epoxy coatings are highly resistant to corrosion and impact damage.
Overall, coated steel pipes are a durable and cost-effective solution for many different types of piping applications, providing long-lasting protection against corrosion and other types of damage.
Applications of coated steel pipe
coated steel pipe base metal is including spiral, straight seam pipe, seamless steel pipe, etc., which are widely used in pipeline projects in the field of petroleum, chemical, natural gas, heating, sewage treatment, water, bridges, steel structures, piling and other marine water.
TYPE OF ANTI-CORROSION COATING:
| Types | Outer corrosion and Inner corrosion |
| FBE Epoxy Powder | FBE epoxy powder preservative structure: electrostatic spraying epoxy powder coating on the pipe surface, a film. The coating has a coating operation is simple, clean, good impact resistance and flexural properties of the coating, temperature resistance advantages. |
| 2PE/3PE Corrosion | 2PE/3PE corrosion structure: the steel surface electrostatic spraying epoxy powder and binder twine lateral lateral wound polyethylene coating, combined with three excellent performance, thereby significantly improving the overall quality of corrosion of the pipe. Resistant to chemical corrosion, cathodic stripping, resistance to mechanical damage performance |
| TPEP Corrosion | TPEP means: Internal coated with epoxy powder and external coated with 3PE or PE and it is a type of anti-corrosion steel pipe coating. The coating consists of three layers: an epoxy primer, an adhesive layer, and a polyethylene outer layer. |
| Coal Tar Epoxy | Coal tar epoxy structure: epoxy resin + filler made of coal tar pitch anti-corrosive coating on the steel surface coated glass fabric as reinforcement corrosion layer formation, commonly used in the pipe wall corrosion. thickness of 0.5 ~ 1.0mm. |
Besides, we also can process the coating for steel pipes & fittings as your specific requirement. Freely contact us !
SPECIFICATION OF COATED PIPES :
| Coating Type | Coating Layer | Coating Thickness |
| Three layers polyethylene | Primer layer: epoxy (Green) | 2.0-4.5mm |
| Inter layer: adhensive (White) | ||
| Inter layer:polyethylene (Black) | ||
| Two layers polyethylene | Primer layer: adhensive | 2.0-4.5mm |
| Top layer: polythene | ||
| Epoxy | Epoxy | 200-400um |
| Two layers epoxy | Primer layer: expoxy (Green) | 400-800um |
| Top layer:intensity epoxy (sage green) | ||
| Three layers polyethylene | Primer layer: expoxy (Green) | 2.5-3mm |
STANDARD OF COATING:
| Standard | Coating Type | Description |
| DIN 30670 | Three-layer extruded and one- or multi-layered sintered polyethylene-based coatings | Provides a durable and corrosion-resistant coating for steel pipes |
| DIN 30671 | Thermoset plastic coating for buried steel pipes | Offers excellent protection against corrosion and mechanical damage for buried steel pipes |
| DIN 30678 | Polypropylene coatings for steel pipes | Provides chemical resistance and high-temperature performance for steel pipes |
| CAN/CSA Z245.20/-Z245.21-02 | External fusion bond epoxy coating for steel pipe /External polyethylene coating for pipe | Ensures excellent corrosion resistance and adhesion to the steel surface; Provides effective corrosion protection and resistance to mechanical damage for steel pipes |
| SY/T 4013-2002 | Coating for transport water, gas, oil, and piling | Specifically designed for the coating of steel pipes used in the transportation of water, gas, oil, and piling |
| SY/T 0315-97 | PE coating for buried steel pipe | Offers corrosion resistance and durability for steel pipes used in buried applications |
SURFACE FINISH :
One Layer / Double Layer FBE anti-corrosive coating powder (200um~800um)
3PP (Polypropylene) Coated Steel Pipe
DIN30678 standard technical specification for polypropylene coating for steel pipe and pipe fittings
3PP Coating Advantages:
The 3PP coated steel pipe refers to steel tubing with three layers of PP(Polypropylene) coating. It offers high electric strength, acid resistance, alkali resistance, salt-tolerance, electric insulation, long service life, thermal endurance and impact resistance. Because of advanced steel pipe coating technology, this type of plastic coated steel pipe features well-bonded coatings.
3PP Coating Applications:
The 3PP coating steel pipe is suitable for transferring special materials, such as high temperature materials, because it offers high electric strength, acid resistance, alkali resistance, salt-tolerance, electric insulation, long service life, thermal endurance and is impact resistant.
TPEP COATED STEEL PIPE:
TPEP means: Internal coated with epoxy powder and external coated with 3PE or PE and it is a type of anti-corrosion steel pipe coating. The coating consists of three layers: an epoxy primer, an adhesive layer, and a polyethylene outer layer.
TPEP coating is used to protect steel pipes from corrosion and damage in harsh environments such as underground, underwater, or in chemical plants. The coating provides excellent resistance to abrasion, impact, and chemical attack, making it ideal for use in oil and gas pipelines, water pipelines, and other industrial applications.
TPEP coating also has excellent mechanical properties, such as high flexibility and toughness, which allow it to withstand harsh environmental conditions, temperature fluctuations, and stress. This makes TPEP-coated steel pipes more durable and longer-lasting than uncoated pipes.
Overall, TPEP coating is a reliable and effective solution for preventing corrosion and protecting steel pipes from damage in harsh environments.
FBE Coated Steel Pipe
FBE coating pipe is Fusion Bonded Epoxy coating steel pipe. It is an externally applied heat resin for pipe. With a form of dry powder at thickness 300-600 microns on to the heated surface of pipe. Once the FBE coated on the pipe surface, the FBE film provides an extremely hard surface with great adhesion to the pipe surface. The FBE layer in a even form and have good resistance to the chemical reaction.
Polyurethane Insulation Coating Steel Pipe
The polyurethane direct buried heat preservation pipe is a direct buried preheating heat preservation pipe with good heat preservation performance, safety and reliability, and low engineering cost. The buried thermal insulation pipe not only has the advanced technology and practical performance that is difficult to compare with the traditional trench and overhead laying pipeline, but also has obvious social and economic benefits, and is also a powerful measure for heating and energy saving.
It is characterized by a multi-purpose use to prevent the spread of fire and good fire safety performance. Black jacket insulation pipe includes spiral steel pipe, straight seam steel pipe and seamless steel pipe. The outer layer is made of black polyethylene and is called a black jacket insulation tube.
According to client’ s requirement