3-Layer Polyethylene (3LPE) is a high-performance multi-layer external anti-corrosion system for steel pipelines, widely adopted in oil & gas, water supply, chemical and buried long-distance pipeline engineering. It consists of three functionally synergistic layers:

I.components

1. Fusion Bonded Epoxy (FBE) Primer: Forms a firm chemical bond with the steel surface, delivering outstanding corrosion resistance, cathodic disbondment resistance and long-term adhesion.

2. Copolymer Adhesive Layer: Acts as a bridge to tightly bond the FBE primer and the outer polyethylene layer, ensuring structural integrity and preventing delamination.

3. High-Density Polyethylene (HDPE) Outer Layer: Provides robust mechanical protection against impact, abrasion, moisture, chemicals and soil stress, with excellent weatherability and electrical insulation.

3LPE coating features stable performance at -40°C to +80°C, long service life up to 50 years, and compliance with international standards such as ISO 21809, ANSI/ASCE B31.8 and DIN 30678. It is the global mainstream solution for buried pipeline corrosion protection.

II. 3LPE Anti-Corrosion Production Equipment

3LPE Anti-Corrosion Coating Production Line is a fully automated integrated equipment for continuous 3LPE coating on steel pipes, supporting diameters from DN150 to DN4200mm. The line is composed of the following key units:

- Pipe Handling & Conveying System: Steady feeding, positioning and rotating to ensure uniform coating.

- Surface Treatment Unit: Shot blasting to reach Sa2.5–Sa3 cleanliness, removing rust, scale and contaminants for optimal bonding.

- Precision Heating System: Induction or medium-wave heating to control the pipe temperature for FBE powder application.

- FBE Electrostatic Spraying Unit: Uniformly applies epoxy powder to form a compact, defect-free primer layer.

- Adhesive & PE Co-Extrusion Unit: Extrudes adhesive and HDPE layers sequentially, realizing tight three-layer composite.

- Cooling & Inspection System: Water cooling for rapid curing; online thickness, holiday and appearance inspection to guarantee quality.

III.Features

This equipment features high automation, stable process parameters, environmental friendliness and high efficiency, compatible with FBE single-layer, 2LPE/2LPP and 3LPE/3LPP processes. It greatly improves pipeline durability and reduces full-life maintenance cost.

When a high-speed projectile hits a steel pipe, impurities such as oxide scale and rust on the surface of the pipe will fall off due to strong impact force, gradually restoring the metallic luster of the steel pipe surface and achieving the ideal cleaning effect. This is like a 'mini storm' that sweeps away the 'dirt' on the surface of the steel pipe. #Shot blasting machine manufacturer # Shot blasting rust removal machine.

At the same time, the impact of the projectile will also cause plastic deformation on the surface of the steel pipe, forming a layer of stress. This type of compressive stress can effectively improve the fatigue strength and corrosion resistance of steel pipes, as if putting a layer of "protective armor" on them, making them better resistant to various external factors during subsequent use and extending their service life. #Manufacturer of through shot blasting machine equipment

During the shot blasting process, the pellets will scatter at the bottom of the equipment. At this point, the projectile recovery and recycling system begins to take effect. Scattered pellets are collected and transported to the separator through equipment such as screw conveyors and elevators. The separator separates the pellets from impurities, dust, etc. The clean pellets after separation are re entered into the shot blasting machine and re ejected onto the surface of the steel pipe. This process repeats itself, achieving efficient recovery and recycling of the pellets, reducing production costs and improving equipment efficiency. #Shot blasting machine accessories # Shot blasting machine maintenance.

It works by converting standard electrical power into a medium frequency current, which is fed into a copper coil. This coil generates a powerful magnetic field that induces large electrical currents, known as eddy currents, directly within the metal charge, causing it to heat up and melt rapidly.

At its core, a medium frequency induction furnace is an advanced electrical furnace that melts metal without any direct contact or combustion. It works by converting standard electrical power into a medium frequency current, which is fed into a copper coil. This coil generates a powerful magnetic field that induces large electrical currents, known as eddy currents, directly within the metal charge, causing it to heat up and melt rapidly.

A medium frequency induction furnace represents a fundamental shift in melting technology, moving away from external heat sources to a process that generates heat directly inside the target material. This principle of electromagnetic induction delivers unparalleled speed, efficiency, and metallurgical control.

FEATURE BENEFIT Direct Internal Heating Rapid melting with high thermal efficiency Electromagnetic Stirring Uniform temperature and chemical composition Precise Temperature Control Minimal burning loss of valuable alloy elements Clean Electric Process No combustion byproducts; low environmental pollution Versatile Melting Suitable for a wide range of metals and alloy

FEATURE BENEFIT Direct Internal Heating Rapid melting with high thermal efficiency Electromagnetic Stirring Uniform temperature and chemical composition Precise Temperature Control Minimal burning loss of valuable alloy elements Clean Electric Process No combustion byproducts; low environmental pollution Versatile Melting Suitable for a wide range of metals and alloys

1. Customer Profile

The customer is a medium-sized manufacturer of plastic profiles, sheets and pipes, facing problems including low output of old equipment, high energy consumption and frequent failures. They planned to expand production and upgrade their production line.

2. Customer Requirements

- High output and stable operation

- Low energy consumption and low noise

- Wide adaptability to different plastic materials

- Quick installation and professional after-sales support

- Compliance with industry safety and quality standards

3. Product Recommendation

We provided a parallel twin-screw extruder with advanced design:

- High-precision barrel and screw for better plasticizing effect

- PLC intelligent control system for easy parameter adjustment

- Energy-saving motor and heating system

- Compact structure, small floor space

4. Implementation Process

1. On-site investigation and demand analysis

2. Customized extrusion solution design

3. Equipment production and quality inspection

4. Delivery, installation and commissioning

5. Systematic operation and maintenance training

6. Long-term tracking and technical support

5. Project Outcomes

- Output increased by over 30% compared with original equipment

- Unit product energy consumption decreased by 20%

- Product surface smoothness and dimensional accuracy improved

- Equipment failure rate reduced greatly

- Customer satisfaction: 98%

- Repeated orders for two additional production lines

The core components of the shot blasting machine include blades, protective plates, directional sleeves, and dividing wheels. The double discs are riveted together to form the impeller body, with eight blades evenly distributed on top. The impeller body and the pellet wheel located at the center are installed on the main shaft driven by the electric motor to achieve synchronous rotation.

There is a protective plate inside the cover, and a directional sleeve and a guide tube are installed on the shell. During the homework process, the projectile enters the shot blasting machine through the feeding tube and is given its initial velocity by the pellet wheel. Subsequently, the projectile flew out through the window of the directional sleeve, collided with the rapidly rotating blades, further accelerated, and finally ejected onto the surface of the workpiece to be cleaned.

Characteristics of shot blasting machine assembly

Performance and durability characteristics

In the field of industrial cleaning, shot blasting assemblies perform excellently through precision design and high-strength manufacturing, ensuring long-term efficient and stable operation. The core components such as blades and protective plates are meticulously designed and manufactured to ensure stable operation of the shot blasting machine during high-speed rotation. At the same time, the clever design of the dividing wheel and directional sleeve enables the projectile to obtain a uniform and strong initial velocity, effectively cleaning the surface of the workpiece. In addition, the protective effect of the guard plate also enables the shot blasting machine assembly to maintain its performance even after long-term use.

Sealing performance of shot blasting equipment

The shot blasting machine is equipped with an advanced sealing system to prevent abrasive from flying out, improve workpiece cleaning efficiency and operational safety. Multiple layers of sealing curtains are installed in the transition zone for incoming and outgoing materials to prevent abrasive particles from accidentally flying out of the inlet and outlet when the workpiece enters.

The top opening of the shot blasting room is equipped with a manganese steel labyrinth baffle, which uses double-layer rubber seals and sealing brushes to effectively prevent abrasives from escaping from the top.

Specially installed grating sensor for precise identification of workpieces. It ensures that the shot blasting machine will only start after the workpiece enters the ejection zone, thereby avoiding the idle of the shot blasting machine and the resulting abrasive splashing when the workpiece is not fully entered.

High efficiency shot blasting machine

Shot blasting machines are known for their high-quality welded shells, lined with wear-resistant protective plates to ensure lifelong durability without the need for replacement or welding repair, which is in sharp contrast to the frequent welding repair of shot blasting machines in China. The double disc design features blades made of special hard manganese steel, with the impeller aperture directly connected to the motor shaft, simplifying the structure and reducing the possibility of abrasive leakage and sealing issues. The shot blasting equipment adopts high-quality materials and innovative design, which extends its service life, reduces abrasive waste, and is superior to similar products.

Fiber laser cutting machine is a high-precision, high-efficiency CNC cutting equipment that uses a fiber laser as the light source. It is widely used in sheet metal processing, machinery manufacturing, automotive, aerospace, electronics, hardware, and other industrial fields.

Working Principle

The fiber laser generator generates a high-energy laser beam, which is transmitted through an optical fiber and focused onto the surface of the material. The focused laser instantly melts or vaporizes the metal, while the auxiliary gas (oxygen, nitrogen, or compressed air) blows away the molten residue, forming a narrow and smooth cutting seam.

Main Features

High Efficiency & Fast Speed: Cutting speed is much higher than traditional CO₂ laser and plasma cutting.

High Precision & Good Quality: Small kerf width, smooth cutting surface, minimal thermal deformation, and high dimensional accuracy.

Low Energy Consumption & Maintenance Cost: Fiber lasers have high photoelectric conversion efficiency, long service life, and no optical lens maintenance in the cutting head.

Stable & Reliable: Compact structure, strong anti-interference ability, suitable for long-term industrial production.

Wide Application: Can cut carbon steel, stainless steel, aluminum alloy, copper, brass, galvanized sheet, and other metal materials.