3PE internal fusion bonded epoxy composite steel pipe

3PE internal fusion bonded epoxy composite steel pipe

3PE inner fusion bonded epoxy composite steel pipe (also known as TPEP anticorrosion pipe) is an upgraded product on the basis of fusion bonded epoxy composite steel pipe in outer polyethylene, which is a better form of anticorrosion for buried long-distance pipeline at present. Cangzhou Tongfu draws on better anticorrosion technology and the company’s 30 years of experience in anticorrosion on the basis of independent development of the fourth generation of large-caliber pipeline new anticorrosion production line, the outer wall of the hot fusion winding process bottom epoxy resin, the middle layer of adhesive, the outer layer of polyethylene to form a three-layer structure of the anticorrosion layer, the inner wall of the thermal spraying of epoxy powder anticorrosion, the powder is heated by the high-temperature fusion and coated uniformly in the pipe body surface. Greatly improve the coating adhesion and coating thickness, enhance the resistance to bumping, corrosion resistance. It can be used for the production of 2PE, 3PE, internal and external coating hot melt epoxy, internal epoxy and external PE/2PE/3PE, etc. The internal and external coating products can be coated and cured at the same time, and the film can be formed at one time. The product was awarded the national utility model patent in 2009 and the national torch project in 2010. Three-layer polyethylene internal fusion bonded epoxy anti-corrosion steel pipe fills the blank of domestic steel pipe better anti-corrosion, the price is comparable with single-layer polyethylene internal fusion bonded epoxy composite steel pipe, and the corrosion resistance has been improved by 3-5 times.

Plastic-coated steel pipe in the country has experienced four upgrades, the introduction of Japan’s vulcanized bed impregnation of a one-time film-forming process, the use of modified polyethylene anticorrosion, due to the adhesion of polyethylene and steel pipe, the slow development of internal and external coating of epoxy powder, but the outer wall of the epoxy resin coating is more brittle and does not tolerate bumping, and later developed to the third generation of internal epoxy external polyethylene anti-corrosion, but the single layer of polyethylene directly with the combination of the steel pipe or the adhesion problems and construction process is inevitable. There are adhesion problems, and the construction process is inevitable bump, and then upgraded to the current fourth generation of anti-corrosion – external 3PE anti-corrosion internal fusion bonded epoxy powder anti-corrosion. 3PE anticorrosion layer is fusion bonded epoxy powder (FBE) for the bottom layer, adhesive for the intermediate layer and extruded polyethylene for the outer protection layer synchronous winding or extrusion and become a whole, with excellent insulating properties and good corrosion resistance. It has excellent insulating properties and resistance to mechanical damage, and has advantages over single-layer polyethylene anti-corrosion.

External three-layer structural polyethylene (3PE) corrosion protection and external single-layer polyethylene (PE) corrosion protection difference

Performance Comparison

Outer 3PE inner fusion bonded epoxy composite steel pipe

External single-layer polyethylene epoxy composite steel pipe

External anti-corrosion layer process

Fusion winding, three-layer structure

Curtain method, drench coating, single-layer

Anti-corrosion structure

Bottom layer epoxy resin coating, middle layer is adhesive, outer high-density polyethylene

Single-layer low-density polyethylene

Thickness of outer anti-corrosion layer

2.5-4mm/1-1.5mm

Adhesion/extremely strong

General: not resistant to boiling, performance, corrosion resistance, wear resistance, impact resistance, corrosion resistance in general, not resistant to scratches, no defects, easy to pinholes, uneven appearance of leveling

To sum up: the fourth generation of the external three-layer structure of polyethylene (3PE) within the fusion bonded epoxy composite steel pipe is significantly better than the current third generation of single-layer polyethylene within the epoxy anti-corrosion.

Technical parameters, product specifications: DN100-DN1800

Material of steel pipe: Q235 or Q345

Coating material: high-density polyethylene, food-grade epoxy powder

Common color: outer wall black, inner wall gray

Coating thickness: outer wall 2.0-4.0mm, inner wall 0.35-0.5mm

Coating method: fusion winding, thermal spraying synchronized with one-time film formation.

Product length: 8-12 meters.

Regular pressure: 0.1Mpa-5.0Mpa

Connection method: welding.

Patching method: lined with stainless steel repair-free technology

Application areas: long-distance water pipeline, water conservancy industry, water industry

3PE internal fusion bonded epoxy composite steel pipe product characteristics:

(1)Smooth inner wall, the friction coefficient is only 0.009-0.01, and it reaches the food grade requirement.

(2) Strong mechanical strength (including impact strength, bending resistance, corrosion resistance, needle penetration and other indicators):

(3) Good cathodic stripping resistance.

(4) good abrasion resistance and coating adhesion ability

(5) Good electrical insulation properties

(6) good chemical resistance and anti-aging properties

(7) Easy to construct, easy to patch and wound.