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Epoxy Coated Steel Pipe

Keywords: FBE (Fusion Bond Epoxy) Coated Pipe, Epoxy Coated Carbon Steel Pipe
Size: OD: 219mm~2020mm;WT: 5mm~25mm; LENGTH: 4mtr, 6mtr, 12mtr, 18mtr, 21mtr
Standard & Grade : DIN 30670, DIN 30671, DIN 30678, SY/T0413-2002 etc
Ends: Plain End/Bevelled End, Burr Removed
Packing: Waterproof Paper wrapped, Steel Strips bundled, two tags on each bundle
Usage: Used for natural gas, petroleum, water & sewage, and pipe systems

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Painting & Coating
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FAQ

Coated steel pipe means the pipe that is by the processing after the corrosion, which can effectively prevent or slow the steel pipe occurs in the course of transport and chemical or electrochemical reaction corrosion phenomena. Coated steel pipe can effectively prevent or slow down the corrosion of steel pipes to extend service life and reduce operating costs pipe.

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.

Standard:
DIN 30670: Polyethylene coatings of steel pipes adn fittings.
DIN 30678: Polythylene coatiing of steel pipes and fittings.
SY/T0413-2002: Technical standard of polythelene coating for buried steel pipeline.

Types of anti-corrosion coating

Pipe corrosion types are divided into external corrosion and internal corrosion.

FBE-Coated-Steel-Pipe

1. FBE anticorrosive 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-coated-steel-pipe

2. 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.

Coal-tar-epoxy-coated-steel-pipe

3. Coal tar epoxy
Coal tar epoxy structure: epoxy resin + filler made of coal tar pitch anticorrosive 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.

3PE Steel Pipe Sizes

Coating Type	Coating Layer	Coating Thickness
Three layers polyethylene	Inside layer: epoxy (Green)	2.0-4.5mm
	Mid layer: adhensive (White)
	Outsidelayer:polyethylene (Black)
Two layers polyethylene	Inside layer: adhensive	2.0-4.5mm
Two layers polyethylene	Outside layer: polythene	2.0-4.5mm
Epoxy	Epoxy	200-400um
Two layers epoxy	Inside layer: expoxy (Green)	400-800um
Two layers epoxy	Outside layer:intensity epoxy (sage green)	400-800um
Three layers polyethylene	Inside layer: expoxy (Green)	2.5-3mm

DIN30670 for three-layer extruded and one- or multi-layered sintered polyethylene-based coatings

DIN30671 thermoset plastic coating For buried steel pipes

DIN30678 polypropylene coatings for steel pipes

CAN/CSA Z245.20/-Z245.21-02 external fusion bond epoxy coating for steel pipe/external polyethylene coating for pipe

SY/T4013-2002 for transport water, gas, oil,piling coating

SY/T0315-97 PE coating for buried steel pipe

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.

FBE-Coated-Steel-Pipe

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-Coated-Steel-Pipe

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.
coated-steel-pipe

What is epoxy coated steel pipe?

Epoxy coated steel pipe is a carbon or alloy steel pipe that has been coated internally and/or externally with a thermosetting epoxy powder through an electrostatic spraying and high-temperature curing process. The coating forms a hard, continuous, non-porous protective layer that provides superior resistance to corrosion, chemicals, abrasion, and cathodic disbondment. It is widely used as an alternative to traditional anti-corrosion coatings such as 3LPE, 3LPP, and FBE, offering excellent adhesion and a smooth internal surface for improved flow characteristics.

What is the difference between epoxy coating and FBE coating?

FBE (Fusion Bonded Epoxy) is a specific type of epoxy coating where the dry epoxy powder is electrostatically applied to a preheated steel surface, then melts, flows, and chemically bonds (fuses) to form a continuous protective film. General "epoxy coating" may include solvent-based liquid epoxies (paint) applied by brushing or spraying. FBE is superior because it is solvent-free, eliminating shrinkage defects due to solvent evaporation, resulting in a denser, more durable film with significantly lower porosity. FBE also offers stronger adhesion to steel (≥10 MPa pull-off strength) and excellent cathodic disbondment resistance, making it the preferred choice for buried and subsea pipelines.

What is the service life of epoxy coated steel pipe?

With proper design, coating specification, installation, and cathodic protection (CP) where applicable, epoxy coated steel pipes have demonstrated service lives exceeding 50 years in buried and underwater applications. FBE coatings provide a long-term bond that resists disbondment under CP, and the barrier properties of the coating prevent water and oxygen from reaching the steel surface, eliminating corrosion initiation. Laboratory accelerated aging tests (e.g., 30–50 year simulated life) validate this performance.

Can epoxy coated steel pipe be welded? How is the coating protected during welding?

Yes, but precautions are required. For weld joint areas, the coating is removed for a distance of approximately 100–150 mm from the pipe end before coating application (factory-applied "cutback"). After welding and inspection, the bare steel weld zone must be field-coated using compatible repair materials such as:
Liquid epoxy (two-part, ambient-cure)
Heat-shrink sleeves (FBE or epoxy-coated)
Epoxy mastic or tape systems
Proper surface preparation of the weld area (blasting or power tool cleaning to Sa2.5) is critical before field coating application.

How do you ensure the quality of the coating?

We implement a strict Quality Control (QC) process for every batch:
Holiday Detection: We use high-voltage spark testers (typically 3000V–5000V) to detect any pinholes or defects in the coating.
Adhesion Testing: We perform pull-off tests or knife tests to ensure the coating is firmly bonded to the steel.
Thickness Measurement: Magnetic gauges are used to ensure the coating thickness meets the specified requirements (usually 250μm to 500μm).