FBE Coated Pipe

Fusion bonded epoxy coating, also known as fusion-bond epoxy powder coating and commonly referred to as FBE coating, is an epoxy-based powder coating that is widely used to protect steel pipe used in pipeline construction from corrosion.

FBE coating steel pipe is fusion bonded epoxy coating steel pipe.It is a kind of external heat resin used for pipes.With a form of dry powder at thickness 400-600 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 surface of pipe.The FBE layer in a even form and have good resistance to the chemical reaction.

The steel pipes are treated by shot blasting and intermediate frequency preheating before painting, and then the epoxy powder coating is sprayed on the surface of the heated pipe products by electrostatic spraying method, which is fused and bonded on the surface of the steel pipe and solidified to form a coating. FBE coating is usually one – step film – forming structure.

Features of fusion bonded epoxy(FBE) coating steel pipes

FBE coating is corrosion resistant and chemical resistant

FBE coating has strong adhesion to steel, film integrity, soil stress and wear resistance.

FBE coating increases the life span of steel pipes.

The FBE coating can be used for external corrosion protection of buried or underwater steel piping installations with operating temperatures of -30~100 °c.

On the other hand,the defect of the FBE steel pipe is it have poor resistance to mechanical damage and heat and humidity.

A three-layer extruded polyethylene coating (3LPE) is composed of extruded, three-layer, anti-corrosive steel pipe coatings.

Single-layer Anti-corrosion Epoxy Powder Pipe

Melting guitar epoxy powder coating:

Double Layer FBE Coating Pipes

The double-layer FBE coating system consists of an FBE base coat covering the bare tube surface and a modified FBE top coat. The coating process of the 2 Layer FBE pipe is basically the same as the standard sintering FBE spraying process, except that the layout of the powder spraying chamber and spray gun has changed, without adding complicated equipment. There are two types of spray guns: double powder spraying chamber and integral powder spraying chamber. They are used in the double-layer FBE coating system, such as double powder spraying chamber spraying and integral powder spraying chamber spraying.

The performance characteristics of the double-layer FBE coating system have been proved by laboratory tests and field application tests. The double-layer FBE anti-corrosion system applied to buried steel pipelines has high bonding strength with the substrate, high resistance to cathodic peeling, and low water absorption. Good high-temperature resistance. The characteristic of this system is that it combines the higher bonding performance of standard FBE and substrate and the better water permeability resistance of modified FBE.

Specification

Technique Data:
1	Moisture Content:	<0.5%
2	Particle Size:	Larger than 250um<0.2% Larger than 150um<3.0%
3	Density:	1.2~1.8g/cm3(Owing to the different formula and different colors)
4	Recommened Film Thinkness :	a. In FBE systems: 300-400 microns (12-16 mils) b. As a primer in 3-layer PE or PP systems: 150-300 microns (6-12 mils)
5	Theoretical Coverage:	0.6993 m2/kg per mm (134.6 ft2/lb per mil)
6	Operating Temperature Range:	"-73ºC (-100ºF) to 110ºC (230ºF)
7	Storage Time:	12 Months if stored below 27ºC (80ºF) and 65% relative humidity.
8	On Sieve:	150μm powder on sieve ≤3%,250μm powder on sieve ≤0.2%
9	Gel time:	under 200℃≥12s, and in accordance with manufacturer’s value ±20%
10	Thermal properties	ΔH≥45J/g,Tg2≥95℃

THICKNESS OF FBE COATING ON STEEL PIPES

DN (mm)	Epoxy Powder (μm)	Adhesive Layer (μm)	Min. Thickness on The Coating (mm)
			Common Level (G)	Strengthen Level (S)
DN ≤ 100	≥120	≥170	1.8	2.5
100 < DN ≤250			2.0	2.7
250 < DN < 500			2.2	2.9
500 ≤DN < 800			2.5	3.2
DN ≥ 800			3.0	3.7

Epoxy Primer Coated Pipes Coating Specification

External Coating
Coating type	Coating Standard
3LPE/3LPP	DIN30670-1991,CAN/CSA Z245,21-2010,ISO21809-1-2009 SY/T 0413-2002,GB/T23257-2009
2LPE/2LPP	SY/T 0315-2002,GB/T23257-2009,ISO21809-1-2009
FBE(Fusion-bond epoxy)	SY/T 0315-2005,AWWA C213-2001,CAN/CSAZ245.20-2010,ISO218909-2-2007,API RP5L9-2001
Bitumen coating Enamel &Tape hot-applied	BS534-1990,AWWA203-2002,AWWA214-2000
Liquid epoxy coating	AWWWA C210-2007
Polyurethane insulated coating	SY/T0415-1996,CJ/T114-2000.EN253-1994
Internal Coating
Liquid Epoxy Coating	AWWAC210-2007
FBE	AWWAC213-2001
Cement Mortar Lining	BS534-1990,AWWA C205-2001
Bitumen Coating	BS534-1990

Epoxy Primer Coated Pipes Technique Data

Technique Data
Moisture Content:	<0.5%
Particle Size:	Larger than 250um<0.2% Larger than 150um<3.0%
Density:	1.2~1.8g/cm3(Owing to the different formula and different colors)
Recommened Film Thinkness :	a. In FBE systems: 300-400 microns (12-16 mils) b. As a primer in 3-layer PE or PP systems: 150-300 microns (6-12 mils)
Theoretical Coverage:	0.6993 m2/kg per mm (134.6 ft2/lb per mil)
Operating Temperature Range:	"-73ºC (-100ºF) to 110ºC (230ºF)
Storage Time:	12 Months if stored below 27ºC (80ºF) and 65% relative humidity.
On Sieve:	150μm powder on sieve ≤3%,250μm powder on sieve ≤0.2%
Gel time:	under 200℃≥12s, and in accordance with manufacturer’s value ±20%
Thermal properties	ΔH≥45J/g,Tg2≥95℃

The manufacturing process for FBE coating involves several steps: surface preparation, primer application, FBE powder application, and curing.
1. The pipes are cleaned and prepared to ensure proper adhesion of the coating.
2. A primer is applied to the surface to improve the adhesion of the FBE coating.
3. The FBE powder is applied to the surface using electrostatic spray equipment. The powder is melted and fused to the surface of the pipe to form a continuous layer.
4. The coated pipe is then heat-cured to fully activate the curing process and harden the FBE coating.
This process results in a uniform, protective layer on the surface of the pipe that provides excellent resistance against corrosion and other environmental factors.