2PE/3PE Coated Pipe

The bottom layer of 3PE anti-corrosion is epoxy coating, the middle layer is polymer adhesive, and the surface layer is polyolefin. Adhesives can be modified polyolefins, which contain polar groups grafted onto the main chain of the polyolefin carbon bonds. In this way, the adhesive can not only be fused with the surface unmodified polyolefin, but also can use the polar group to react with the epoxy resin. This combination is characterized by the best bonding strength between the three coatings, and the performance and characteristics of each layer make the three coatings complementary. It is characterized by high cost and complex process.

The 3PE Coating Steel Pipe enjoys good impact resistance, abrasive resistance, shock resistance, acid resistance, high quality and long service life.

3 PE coating steel pipe can be also used in urban fuel gas piping system, storage tanks and groove piping system, protecting pipe in electricity and communication industries and water piping systems.

3PE anti-corrosion pipe three-tier structure:

2PE pipe anti-corrosion two-story structure, the first layer adhesive (AD), the second layer of polyethylene (PE), two kinds of integration.

Coating Material: Epoxy Powder, Adhesion, Polyethylene Or Polypropylene, Cement Inside

3PE anti-corrosion consists of three layers of structure

2PE anti-corrosion (two-layer polyethylene) structure

3PE Coating Steel Pipe/2PE Coating Steel Pipe:

-The third party, SGS, BV, can be accepted.

2PP PRESERVATION:

PP anti-corrosion pipe two-story structure: the first layer adhesive (AD), the second layer of polypropylene (PP), two kinds of integration, three layers thick with the same PP.

3PP PRESERVATION:

PP three-tier structure of anti-corrosion pipeline:

-The first layer of epoxy powder (FBE50 – 100um),

-The second adhesive (AD) 250 – 400um,

-The third layer of polypropylene (PP) 1.4 – 4.0mm.

Three of the integration, and steel pipe with a good solid coating, Coating temperature up to 110 degrees.

-Diameter of Φ159 – Φ1440

Thickness of 3lpe coating on steel pipes

minimum 125 µm Epoxy layer thickness

minimum 150 µm copolymer layer thickness

minimum thickness of 1.8 mm to 4.7 mm polyethylene or polypropylene layer

Minimum total layer thickness range

M kg/m	Layer thickness in mm
	Class A1	Class A2	Class A3	Class B1	Class B2	Class B3	Class C1	Class C2	Class C3
M ≤ 15	1,8	2,1	2,6	1,3	1,8	2,3	1,3	1,7	2,1
15 < M ≤ 50	2,0	2,4	3,0	1,5	2,1	2,7	1,5	1,9	2,4
50 < M ≤ 130	2,4	2,8	3,5	1,8	2,5	3,1	1,8	2,3	2,8
130 < M ≤ 300	2,6	3,2	3,9	2,2	2,8	3,5	2,2	2,5	3,2
300 < M	3,2	3,8	4,7	2,5	3,3	4,2	2,5	3,0	3,8
Please note: The total required thickness may be reduced for SAW pipes by a maximum of 10% on joint seam. Class 1 and 2 for medium and light applications (sandy soil). Class 3 – application in extreme conditions (rocky soil) or underwater.

Minimum thickness of finished coating

Pipe Sizes (Specified OD)	Minimum Coating Thickness Chart (mm)
≤ 10 3 /4” (273.1 mm)	2.5
> 12 3 /4” ( 323.9 mm) to ≤ 18” (457 mm)	2.8
> 20" (508.0 mm) to ≤ 30" (762 mm)	3.0
> 32" (813.0 mm)	3.3

External coating

Coating Type	Coating Standard
Single Layer FBE	SY/T 0315-2005, CAN/CSA Z245.20-2010,
DEP 31.40.30.32-Gen-2011, ISO     21809-2-2007, API RP 5L9-2001
Double Layer FBE	Q/enPC 38-2002, CAN/CSA Z245.20-2010
2LPE/2LPP Coating	SY/T 0413-2002, GB/T 23257-2009, ISO     21809-1-2009
3LPE/3LPP Coating	SY/T 0413-2002, GB/T 23257-2009, DIN     30670-1991, CAN/CSA Z245.21-2010，
ISO 21809-1-2009, NF A49-711-1992, NF     A49-710-1988
Concrete Weight Coating	Q／HS 3017—2008
Insulation Coating	SY/T 0415-1996, CJ/T 114-2000, EN     253-1994
Bitumen Coating	BS 534-1990

Internal coating

Coating Type	Coating Standard
Internal Liquid Epoxy Coating	API RP 5L2-2002, DEP     31.40.30.35-Gen-2005
Single Layer FBE	API RP 5L7-1988
Internal Cement Lining	BS 534-1990, AWWA C205-2000
Bitumen Coating	BS 534-1990

3PE anti-corrosion: 
The bottom layer of 3PE anti-corrosion is epoxy coating, the middle layer is polymer adhesive, and the surface layer is polyolefin. Adhesives can be modified polyolefins, which contain polar groups grafted onto the main chain of the polyolefin carbon bonds. In this way, the adhesive can not only be fused with the surface unmodified polyolefin, but also can use the polar group to react with the epoxy resin. This combination is characterized by the best bonding strength between the three coatings, and the performance and characteristics of each layer make the three coatings complementary. It is characterized by high cost and complex process.

A layer of epoxy powder (FBE>100um) (epoxy powder >100um means greater than 100 microns);
Two-layer adhesive (AD) 170～250um;
Three-layer polyethylene (PE) 2.5～3.7mm.
The three materials are integrated and firmly combined with the steel pipe to form an excellent anti-corrosion layer.

The 3PE anti-corrosion layer organically combines the anti-corrosion properties of the fused epoxy powder with the mechanical scratch protection properties of polyethylene, and at the same time solves the problem of polyethylene's sales. Due to the poor adhesion of the hot melt adhesive, the peeled polyethylene has a shielding effect on the cathodic protection. 3PE anti-corrosion layer has high requirements on the surface treatment state of the pipe, and the depth of the anchor pattern should reach 50μm～75μm. Whether the side will affect the cathodic stripping resistance and waterproof penetration ability of the anti-corrosion layer. 

2PE anti-corrosion:

One layer of adhesive (AD), two layers of polyethylene (PE), the two materials are integrated, the thickness of each layer is the same as that of the three layers of PE