Detailed interpretation of 3PE anti-corrosion insulation production line steel tube processing technology

3PE anti-corrosion steel pipe butt weld consists of seamless spliced steel pipe, spiral steel pipe and straight slotted steel pipe. The three-layer structure polyethylene (3PE) anticorrosive coating has been widely used in the field of oil pipelines due to its excellent anti-corrosion, anti-water vapor permeability and physical properties. 3PE anticorrosive steel pipe a anticorrosive layer is particularly important for the service life of buried pipes. For pipes made of the same material, some of them are buried underground for decades without erosion, and some leak after two years. That's because they chose a different coating.

1, the introduction
3PE anticorrosive steel pipe refers to the 3-layer structural polyolefin coated (MAPEC) outer anticorrosive steel pipe, which is a common anticorrosive pipe in China. There are also IPN8710, FBE epoxy powder, epoxy resin asphalt cement and other anticorrosion methods. Generally, it refers to the corrosion protection of steel pipe surface.

2. Anticorrosive structure
Corrosion protection method of steel tube surface

3PE corrosion protection is generally composed of three layers of structure:

One coat of epoxy powder (FBE>100um)

Double layer adhesive (AD) 170 ~ 250um

Three-ply polyethylene (PE) 2.5-3.7mm

In the operation process, three kinds of raw materials are mixed into one. After production and processing, they are firmly integrated with the steel pipe to produce a high-quality anticorrosion layer. Its production and processing methods are generally divided into two types of winding and double round die package.

The 3PE anticorrosive steel tube coating is a new anticorrosive steel tube coating that combines the 2PE anticorrosive steel tube coating from Europe with the epoxy powder anticorrosive steel tube coating (FBE) commonly used in North America. It has been recognized and applied in the world for more than a decade.

The coating of 3PE anticorrosive steel tube is an epoxy powder anticorrosive coating that is touched by the bottom layer and the surface of the steel tube, and the inner layer is a copolymer adhesive containing a clastic structural group. The whole surface layer is a high density polyethylene anticorrosive coating.

The three PE anticorrosive coating is a combination of epoxy resin and polyethylene raw materials with high impermeability and high physical properties. Up to now, it has been recognized all over the world for its practical effect and good properties of pipeline anticorrosive coating, which has been applied in numerous engineering projects.

3. PE anticorrosive steel pipe and anticorrosive processing technology

Steel tube cavity corrosion

There are two kinds of internal anticorrosion of steel tube: one is thermal melting epoxy resin powder (melting at high temperature), and the other is liquid epoxy coating, common liquid epoxy resin IPN8710 (cold painting at room temperature).

4. Main USES

For the main use of 3PE anti-corrosion steel pipe, many people only know one of them and don't know the other. Its efficacy really involves a wide range, and it is applicable to coal mine water supply and drainage, mine anchoring and shotcrete, natural ventilation under positive and negative pressure, coal-bed methane extraction, fire protection water spraying and other pipe network. Power plant processing technology tap water waste, intelligent return water transport pipeline. The drainage pipe road has the special applicable scope for the anti-blowout, sprinkling water system software. Maintain waterproof casing for power engineering, communication, highway and other cables. Can be used for multi-storey building water supply and drainage, heating pipe network heating, drinking water projects, natural gas transport, buried water pipeline. Crude oil transportation pipeline, chemical plant, pharmaceutical industry, printing and dyeing factory and other fields of transportation of corrosive materials processing pipeline. Waste water treatment sewage pipe, sewage pipe and microbial tank anti-corrosion project. It can be said that 3PE anticorrosive steel pipe is indispensable in today's capital construction, and we believe that it will have more brilliant test results in the future according to the development of high and new technology.

5. Machinery and equipment

Making key machinery and equipment of 3 PE anticorrosive steel pipe: steel pipe cache service platform, dial the generating set, cable tractors, threading tube with mechanical equipment, high pressure gun machine, repair service platform, transmission line, steel pipe preheating furnace, shot blasting cleaning machine and contradiction between steel pipe back to the server maintenance transmission line, quick put the roller group, rollers, maintenance service platform, etc. The production line of anticorrosive steel pipe can be used for single-side FBE, two-layer FBE, two-layer PE, two-layer PP and 3PE anticorrosive work of steel pipe. Production processing tube by Φ 104 mm (4 "), a larger production and processing by Φ 1600 mm (63 "), large working capacity of 350 m2 / h, and the production line include steel pipe transmission system software, metal surface treatment system software, play dust removal equipment, steel pipe heating system software, electrostatic powder coating system software, coating, water cooling system, system software and cutting system, hydraulic and pneumatic control valve, monitoring system and the electronic control system, etc.

6, strengths,

General steel pipe under the application of hard environment, then there will be a serious erosion,, in turn, will reduce the service life of steel pipe, anti-corrosion insulation heat preservation pipe is relatively long, could the general condition is able to apply all 30 to 50 years, and the proper installation and application are also able to make the tube maintenance cost is reduced, anti-corrosion insulation heat preservation pipe can also set up alarm equipment, automatic identification tube leakage common faults, the exact knowledge common fault and automatic alarm.

3 PE anticorrosion heat preservation pipe heat insulation properties, thermal damage is only twenty-five percent of the traditional pipe fittings, long-term operation or to save more resources, significantly reduce electric energy costs, but also have relatively strong capacity of moisture and corrosion resistance, and also need not affiliated trench excavation, immediately can be buried underground or in the water, in the engineering construction is also simple and quick, comprehensive construction cost is relatively low, under cryogenic standards also have excellent corrosion resistance and impact resistance, and in a certain natural environment will also be able to immediately buried in permafrost.

7, steps,
3 PE anticorrosive steel pipe butt weld before conducting do anticorrosive solution on into the into the tube service platform of steel pipe inspection, record, on steel pipe surface sandblasting derusting, carried out later on steel pipe surface cleanliness and anchor lines deep check whether conform to the rules, does not conform to the standard stipulated by hand grinding wheel grinding polishing, and at the end of the pipe end coil scotch tape, dust, medium frequency induction heating to the prescribed temperature, epoxy powder paint, adhesive squeeze molding machine side coiling, PE extrusion molding machine side bound to burn, the anticorrosive pipe in cooling water, spray sign for the qualified products, the service platform, pallet for shipment.

Qingdao city plastic machinery co., LTD., the main production of 3 PE production line, vacuum sizing production line, the one-step production line, specializing in the production of various anti-corrosion insulation equipment professional manufacturers, the company production of PE tube vacuum sizing and inner black yellow jacket ldpe-g-nvp inflatable insulation pipe production line, the one-step direct molding polyurethane insulation pipe line, PE, PE pipe anticorrosion line, the outer wall of steel pipe shot blasting derusting production line, Extruder, tractor, vacuum sizing box, planetary cutting saw, air packer, pipe, sheet mould, polyurethane high and low pressure foaming machine, foaming platform, pipe piercing machine, rectifying deviation machine, epoxy powder spraying equipment, groove machine and other dozens of pipe anti-corrosion and thermal insulation equipment