3-layer polyethylene winding layer to prevent corrosion of steel pipe
The parent products of 3pe anti-corrosion steel pipe include seamless steel pipe, spiral steel pipe and straight seam steel pipe. The anti-corrosion coating of three-layer polyethylene (3PE) is widely used in the oil pipeline industry because of its good corrosion resistance, water and oil penetration and other properties, etc. 3PE anti-corrosion steel pipe layer of anti-corrosion is very important for the life of buried. pipes, the same plumbing equipment, some buried in the ground for many years without corrosion, and some leaks occur in a few years. It is because they use different methods to prevent corrosion.
Steel tube outer wall to prevent corrosion
3PE anti-corrosive usually has 3 layers.
First layer of epoxy powder (FBE>100um)
The second layer of glue (AD) 170 ~ 250um
The third layer of polyethylene (PE) 1.8~3.7mm
The real work of our composite materials as one, after finishing to make it and the steel pipe firmly together to create a very good anti-corrosion system. Its working method is mainly divided into two winding type and round mold wrapping type.
3PE anti-corrosion steel pipe coating, also known as (three-layer polyethylene anti-corrosion coating), is a new anti-corrosion steel pipe coating resulting from the intelligent combination of 2PE anti-corrosion coating in Europe and epoxy powder anti-corrosion steel coating (FBE) is widely used in North America. It has been recognized and used all over the world for more than ten years.
The layer of 3PE anti-corrosion steel pipe is the bottom layer and the surface of the steel pipe is coated with epoxy powder to prevent corrosion, and the middle layer is a copolymer binder with branch structure working group. The top layer is a high-density polyethylene anti-corrosion layer.
3PE anti-corrosion layer integrates the high impermeability and high mechanical strength of epoxy resin and polyethylene material. So far it is the best anti-corrosion coating for pipelines with the best results and global performance, and therefore used in many projects.
Metal pipe wall to prevent corrosion
Steel pipe wall anti-corrosion is divided into two types: one is hot-melt epoxy resin powder anti-corrosion (high temperature melting), liquid epoxy coating, commonly used liquid epoxy IPN8710 (temperature spray). The two types of the inner wall to prevent corrosion to prevent corrosion process and performance is a special difference in.
Lead regulations
thickness of inner layer (um)
Reduce the tube (liquid epoxy coating)
≥50
Anti-corrosion pipeline (high temperature fusion bonded epoxy resin powder coating)
Ordinary level
≥250
Improve level
≥350
Its performance is as follows.
Comparative performance
Hot melt epoxy coating
Liquid epoxy paint
Raw material
Solvent-free, food powder, environmental protection
Irritated smell, thinner, healing agent composition, etc.
Anti-corrosion process
Hot melt spray, reacting with steel tube substrate at 250℃ to form a steel-plastic alloy layer
Cold spray for steel tube with gun, long curing time.Wilson Pipeline
Adhesion
Mechanical assembly, chemical bonding, diffusion, electrostatic bonding
Mechanical embedding only
Layer thickness
300-500 months
30-80 Him
Also corrosion
Corrosion resistance, wear resistance, impact resistance
Anti-rust not anti-corrosion, not resistant to water washing, plays a role in reducing
Friction coefficient
0.0086 a
0.012 a
Theoretical life
50 years
3-5 years
Executive Standards Editor Podcast
Domestic use of the SY/T0413-2002 standard, valid since August 1, 2002. Wilson Pipeline The standard mainly controls polyethylene and high-density polyethylene, and Vicat softening point is set not less than 110 ℃; The thickness of the layer to prevent corrosion is determined according to the German standard DIN30670-1991, which is mainly based on low and medium density polyethylene. Greatly improve the effect of 3PE anti-corrosion coating. SY/T0413-2002 will be 3PE anti-corrosion coating peeling strength, impact resistance of the index increased, and specified according to some special materials carbon black content, to ensure that the strength and air operation of 3PE anti-corrosion coating, and increase the peeling strength (for example heat shrinkable sleeve, heat shrinkable strip of peel strength of primer steel) sample frequency.
Update Status Edit Podcast
In the early 1980s, 3PE anti-corrosion steel pipe was first widely used in Europe, which was well received by users and is the most commonly used pipeline coating. The China National Petroleum Corporation (CNPC) decided to introduce 3PE coating and coating in the summer of 1994 for the outer surface to prevent corrosion owhich are under construction. In December of the same year, a joint delegation of experts from CNPC Infrastructure Bureau, Pipeline Bureau, Petroleum Design Institute and Northwest Pipeline Command to the United States, Italy, Turkey.
Professional 3pe steel pipe manufacturer with long professional experience Wilson Pipeline
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