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extruded polyethylene coating for large diameter pipes gas pipelines

Qingdao Hyall Trenovo Co.Ltd

extruded polyethylene coating for large diameter pipes gas pipelines

Brand Name : HYALL

Model Number : HY3-1-23028

Place of Origin : CHINA

MOQ : 1 set

Price : USD150,000-USD600,000/SET

Payment Terms : T/T, Western Union

Supply Ability : 10 whole sets per season

Delivery Time : 40-60 working days

Packaging Details : export packing

Weight : 3000kg

After-sales service provided : Engineers available to service machinery overseas

Color : Optional

Type : General

Working speed : 50-100m/min

Capacity : 5-300t/d

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What does Three-Layer Extruded Polyethylene Coating (3LPE) mean?

Three-layer polyethylene (3LPE) is a multi-layer coating consisting of three functional components: a high performance fused epoxy (FBE) primer followed by a copolymer binder and an outer polyethylene to provide tough, durable protection. The 3LPE system provides good pipe protection for small and large diameter pipes operating at medium and high temperatures.

  • Bonding agent or copolymer layer
  • Epoxy layer
  • Polypropylene or polyethylene layer

Three-Layer Extruded Polyethylene Coating (3LPE)

A three-layer extruded polyethylene coating is used for various types of pipelines including sewer systems, water pipelines, gas pipelines and other channels that are dangerous to water. Polyethylene coatings have been in use to protect buried pipelines from corroding since the 1950s. This type of coating provides higher resistance to insulation than bitumen coatings.

A three-layer extruded polyethylene coating can be applied through sight extrusion and sleeve extrusion. These two methods of applying polyethylene coating were introduced in the 1960s, replacing the sintering technique. It was in the 1980s when 3LPE became very prevalent in the industry.

One advantage of this coating material is that it is ultra-adhesive, even at room temperature. Also, it can be easily cut back as necessary by having the pipelines heated. Furthermore, this material has a very strong chemical resistance that makes it applicable even in the most aggressive environments, including all forms of soil.

The chemical resistance of this coating prevents its corrosion. However, it should be noted that just like many materials, it is also prone to some types of corrosion. Due to this, as early as 1974, testing has been required to determine the aging or corrosion resistance of 3LPE. This is conducted by measuring the temperature with the use of a thermometer at 140°F (60°C). The measure of aging is the melt index, which is set at an initial value of 25%. Over the years, more advanced testing methods have been developed to determine the 3LPE's aging and resistance to corrosion.

Long-term preservation

The FBE components provide excellent steel adhesion, excellent long-term corrosion resistance and pipeline protection at moderate temperatures.

Low application temperature (LAT) FBE may be selected as primer if desired to ensure low preheat conditions and long term integrity of high strength steel (X80 or higher).

In addition, the 3LPE system has excellent anti-cathodic stripping performance, reducing the life cycle cost of cathodic protection.

Engineering solution

Advanced manufacturing technology allows you to customize the 3LPE system for your specific project.

Good mechanical protection

The rugged outer PE layer protects the pipe during transportation and installation, reducing costly maintenance costs while providing additional ground protection against shear forces, chemicals and abrasive soil conditions.

By increasing the thickness of the polyethylene coating, the 3LPE system can provide a high level of mechanical protection in difficult environments without the need for expensive backfilling materials.

Global availability

Can be produced in a single plant or coating plants to improve project logistics

With our extensive global footprint, customers can benefit from the management of a single point of contact project, even in the most demanding logistics configurations.

Triple polyvinyl coated pipe is the first choice for global oil and gas transmission. It can withstand a variety of temperatures and environments, from dessert to dry land to deep water. 3LPE coated steel tubes are used to transport drinking water, oil, gas and other fluids. 3 lpe coating tube can be as high as 60 ℃ to 80 ℃ high temperature use.

3LPE coated pipe features:

1. Excellent chemical corrosion resistance to prevent steel pipe damage.

2. Cathodic stripping

3. The polyethylene coating prevents any physical damage to the pipe or bonded epoxy during handling.

4. 3LPE coated tubes are characterized by high performance and long life.

Product Properties

Min pipe diameter51 mm (2")
Max pipe diameter3620 mm +
Min handling construction temperature-40°C
Max recommended operating temperature85°C


Natural gas pipeline

Straight pipe

Oil pipeline

Small straight pipe

Water supply system pipeline

Big dia.steel pipe

3 lpe coated pipe

Three-layer polyethylene coated pipeline is the world's preferred oil and gas pipeline. It can withstand a variety of temperatures and environments, from desert arid lands to the deep ocean. The 3LPE coated steel tube is used for the transportation of drinking water, oil, natural gas and other fluids. 3LPE coated tubes can be used at 60o - 80oc.

Features of 3LPE coated tubes:

1. Excellent chemical corrosion resistance to prevent steel tube damage.

2. Cathodic stripping resistance

3. The outer layer of polyethylene prevents any physical damage to the pipe or fused epoxy during the process

4. 3LPE coated tubes have high performance and long service life

3LPE pipe coating equipment supplier in China

HYAL Ltd. is a pioneer in supplying anti-corrosion 3LPE coating line . We provide 3LPE integrated external coating equipment, which can be used in underground or underwater environment. Our company also produces 3LPP, FBE, internal epoxy and other anticorrosive pipeline coating machines.

Standards for the manufacture of 3LPE pipes include:

·DIN 30670

·CSA Z245.2

·AS 4321

·IS 3581

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