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Epoxy Coated Steel Pipe

Published:2024-06-17 | Last Updated: 2025-06-13 Views: 60

I. Plastic-coated steel pipe properties:

Section Shape	Round
Surface Treatment	Cold Rolled Hot Rolled
Place of Origin	Hebei, China
Alloy Or Not	Non-Alloy
Grade	ST37/ST45/ST52/25Mn/27SiMn/E355/SAE1026/STKM13C
Application	Fluid Pipe, Boiler Pipe, Drill Pipe, Hydraulic Pipe, Gas Pipe, OIL PIPE,, Chemical Fertilizer Pipe,, Structure Pipe, Other
Special Pipe	API Pipe, EMT Pipe, Thick Wall Pipe, Other
Thickness	0.8-30 mm
Length	12M, 6m, 1-12m or customized
Product name	Fusion Bonded Epoxy Coating Steel Pipe
Material	Q195/Q235/Q345/S235JR/S275JR/S355JR
Usage	construction, petroleum and other industries
Color	Customers' Requirement
Technics	ERW/SAW/EFW/SMAW/GMAW/GTAW
Surface	Customers't Requirement
MOQ	1 Ton
Packing	Standard Seaworthy Packing

II. Epoxy Coated Steel Pipe parameters

Product name	FBE Coated Steel Pipe
Standard	GB/T 3091, GB/T 13793, ASTM A252, ASTM A53, ASTM A500, EN 10210,
Standard	EN 10219, API 5L,DIN 1626/1615, DIN 17120, etc.
Grade	SS400, Q235, Q345, Q460, A572 Gr.50, Gr.1/Gr.2/Gr.3, S235,
Grade	S275, S355, Grade A/B, X42, X52, X60, X70, etc.
Material	Carbon steel: ASTM A106 GR.A/GR.B/GR.C API 5L GR.A/GR.B/X42/X52/X60/X65/X70/X80 A519 GR.1008-GR.1541 DIN2391 ST35/ST45/ST52 DIN1329 ST37/ST44 BS 6323 LW12b/LW19b JIS-G3444 STK400/STK490/STK500/STK540
Surface	Prime quality (bared, oiled, color paint, 3LPE, or other anti-corrosive treatment)
Inspection	With Chemical Composition and Mechanical Properties Analysis;
Inspection	Dimensional and Visual Inspection, also with Nondestructive Inspection.
Size	1/2"-28"(DN15-DN700)/21.3mm-711mm
Wall Thickness	SCH5/SCH10/SCH40/SCH80/SCH160/XXS
Wall Thickness	1.65mm-30.75mm
Application	structure, electric power transmission tower projects, piling, water, oil & gas pipeline engineering,mechanical industry,
Application	municipal projects, roads and its auxiliary facilities

III. Epoxy powder coated steel pipe production flow chart

环氧粉末涂塑钢管生产流程图_C

IV. Advantages of FBE (Fusion Bond Epoxy) Coated Pipe:

i.The epoxy coating provides exceptional corrosion resistance, ensuring the pipe's durability and longevity in harsh environments.

ii.The epoxy coating creates a smooth interior surface, reducing fluid friction and enhancing flow efficiency.

iii.The epoxy coating is highly resistant to abrasion and wear, ensuring the pipe maintains its structural integrity and appearance over time.

iv.Epoxy coated steel pipes are easy to install and maintain. The coating provides a uniform and consistent surface that is compatible with various joining methods, such as welding and flanging.

v.Epoxy coated steel pipes are environmentally friendly. The epoxy coating is non-toxic and does not release harmful chemicals into the environment.

V. Material of epoxy coated steel pipe:

i. Material of base steel pipe

Material Properties Table

Material Type	Standard	Chemical Composition	Mechanical Properties	Application Conditions
Carbon Steel	ASTM A53 Gr.B	C≤0.30%, Mn≤1.2%, S≤0.045%	Tensile Strength ≥ 415 MPa	Low-pressure water transmission, general industrial pipelines
Low Alloy Steel	API 5L Gr.X42-X70	Microalloying elements such as Nb/V/Ti	Yield Strength 290-517 MPa	Oil and gas transmission, high-pressure pipeline networks
Stainless Steel	ASTM A312 TP316L	Cr16-18%, Ni10-14%, Mo2-3%	Pitting Resistance Equivalent (PREN) ≥ 25	Highly corrosive media (seawater, chemicals)

ii. Epoxy coating system

(1) Layer structure

(2) Coating material composition

Component Properties Table

Component	Function	Typical Ratio	Key Performance Indicators
Epoxy Resin	Film-forming matrix (Bisphenol A type/Phenolic modified)	50-60%	Epoxy equivalent 700-900 g/eq
Curing Agent	Cross-linking reaction (Dicyandiamide/Phenolic amine)	5-8%	Activation temperature 180-220°C
Pigment/Filler	Enhancement/Corrosion resistance (Titanium dioxide/Mica iron oxide)	25-35%	Particle size distribution D50=30-40μm
Additives	Flow leveling/Conductivity/Ultraviolet resistance (Flow agent/Carbon black)	2-5%	Volume resistivity ≤10⁸ Ω·cm

iii. Core technical parameters

Testing Items Table

Test Item	Standard Method	Requirement	Failure Mechanism
Adhesion	ASTM D6677	≥15MPa (Pull-off method)	Interfacial hydrolysis and stripping
Cathodic Disbonding Resistance	ISO 15711	≤8mm (28d/1.5V)	Cathodic hydrogen evolution causing blistering
Salt Spray Resistance	ASTM B117	No substrate corrosion after 1000h	Coating pinhole expansion
Wear Resistance	ASTM D968	≥5L/μm (Sand-fall method)	Mechanical wear thinning

iv. Material selection guide

(1) Selection decision tree

(2) Solutions for special working conditions

High temperature medium (＞80℃):

Select phenolic modified epoxy (temperature resistance 120℃) or bisphenol F epoxy

Soil stress effect:

Use high toughness coating (fracture elongation ＞5%)

Hot and cold cycle:

Add ceramic microspheres (reduce thermal expansion coefficient)

v. International Standard Comparison

Performance Requirements Table

Performance Requirement	Chinese Standard	American Standard	European Standard
Coating Thickness	GB/T 23257	AWWA C213	EN 10288
Adhesion	SY/T 0315	CSA Z245.20	DIN 30678
Hygienic Safety	GB/T 17219	NSF/ANSI 61	KTW/W270

VI. Structure of epoxy coated steel pipe:

i. Basic structure: Epoxy coated steel pipe consists of three parts: steel pipe, adhesive and anti-corrosion coating.

ii. Steel pipe: provides structural strength and support.

iii. Adhesive: plays the role of firmly attaching the coating to the steel pipe.

iv. Anti-corrosion coating: composed of epoxy resin, providing anti-corrosion function.

v. Coating structure: Primer: applied on the surface of the steel pipe as the base layer to enhance the adhesion and anti-corrosion between the coating and the steel pipe.

vi. Main paint: applied on the primer, has good corrosion resistance and wear resistance, and protects the inner and outer surfaces of the steel pipe.

VII. Application scope of epoxy coated steel pipe:

i. Oil and gas transportation

ii. Urban water supply system

iii. Sewage treatment system

iv. Chemical industry

v. Power and communication industry

vi. Marine engineering

vii. Mining and mining

viii. Fire protection system

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Next：3PE anti-corrosion seamless steel pipe

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