PE gas pipe

PE gas pipe
Implementation Standard: GB/T 15558.2-2023
Material: High density polyethylene (HDPE) resin, with necessary additives added.
Caliber range: Nominal outer diameter 16 mm~800 mm
Use: Mining, metallurgy, coal industry, thermal power plants, dredging engineering, petroleum, chemical, building materials, and grain.
Features: Strong ability to withstand pressure; Good economic viability; Convenient construction; Excellent hydraulic performance; Chemical corrosion resistance; Flexible and impact resistant; Durable and wear-resistant; Environmental protection and safety.
Custom orders are supported.
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Description

1.Product Introduction

PE gas pipes are a type of piping product primarily made from polyethylene (PE) resin, specifically designed for gas transportation. These pipes exhibit a range of excellent properties, including chemical corrosion resistance, low-temperature impact resistance, stress crack resistance, and wear resistance, with a service life of over 50 years.

PE gas pipes are mainly classified by density into high-density polyethylene (HDPE), medium-density polyethylene (MDPE), and low-density polyethylene (LDPE). Among these, HDPE is widely used for pressurized gas pipelines due to its excellent mechanical properties. Internationally, polyethylene pipe materials are categorized into five grades: PE32, PE40, PE63, PE80, and PE100. Gas pipes are primarily manufactured using PE80 and PE100 grade materials.

Product Specifications

2.Technical Specifications

Parameter Item

Technical Specification

Technical Standard

GB/T 15558.2-2023

Diameter Range

Nominal Outside Diameter 16 mm ~ 800 mm

Material Grade

PE 100 and PE 80

Operating Temperature

-20 ℃ ~ 40 ℃

Maximum Operating Pressure (MOP)

≤ 1.0 MPa

Minimum Required Strength (MRS)

(MRS) PE80≥8.0MPa, PE100≥10.0MPa

Elongation at Break

≥350%

Oxidation Induction Time (OIT)

>20min (200℃)

Service Life

50 years (under rated temperature and pressure)

3.Connection Methods

  1. Electrofusion Joining
  • This method uses a dedicated electrofusion welding machine to connect straight pipes to straight pipes or straight pipes to fittings.
  • The joint strength achieved by this method is higher than the strength of the pipe body itself.
  • It is generally preferred for pipes with diameters below 160mm.
  1. Butt Fusion Joining
  • This method uses a dedicated butt fusion welding machine to connect pipes.
  • The butt fusion procedure is regulated by the specific national standard GB/T 32434-2015.
  • It is generally preferred for pipes with diameters above 160mm.
  1. Steel-to-Plastic Connection
  • When PE pipes need to be connected to metal pipes or equipment, methods such as flanges or threaded connections can be employed.

4.Advantages and selling points

  • Reliable Connectivity:Utilizes electrofusion or butt fusion joining methods, creating joint strengths that exceed the pipe body itself, ensuring system integrity and leak-proof performance.
  • Excellent Low-Temperature Resistance:Polyethylene has an extremely low embrittlement temperature, allowing safe operation within a -60°C to 60°C range and preventing pipe cracking during winter installation.
  • Outstanding Corrosion Resistance:Resistant to a wide range of chemical agents and free from electrochemical corrosion. Soil chemicals do not cause degradation to the pipeline.
  • Superior Impact Resistance:PE pipes feature excellent toughness and high impact strength. They can withstand being directly driven over by heavy objects without rupture.
  • Good Flexibility & Ease of Installation:The pipes are highly flexible, easy to bend, and can navigate around obstacles, reducing the need for fittings. Their light weight, simple welding process, and compatibility with trenchless technologies facilitate quick and economical installation.
  • Long Service Life & Abrasion Resistance:Under rated temperature and pressure conditions, PE pipes can operate safely for over 50 years. Their abrasion resistance is 4 times that of steel pipes, contributing to a longer service life when conveying media.

5.Product Applications

  • Urban Gas Transmission and Distribution Systems:Used in municipal pipeline projects for natural gas, liquefied petroleum gas (LPG), manufactured gas, etc., particularly suitable for urban medium-pressure gas distribution networks.
  • Industrial Applications:Serves as pipelines for conveying liquids and slurries in industries such as chemical, chemical fiber, food, forestry, printing & dyeing, pharmaceuticals, light industry, papermaking, and metallurgy.
  • Other Fields:Also applicable for agricultural irrigation pipelines, postal & telecommunication conduit, and protective casing for power cables.

6.Testing & Certifications

  • Compliance Standards:Products must conform to national standards including GB/T 15558.2-2023 “Polyethylene (PE) piping systems for the supply of gaseous fuels — Part 2: Pipes”.
  • Performance Requirements:Multiple technical performance indicators must meet specifications, including hydrostatic strength, elongation at break, weatherability, slow crack growth (SCG) resistance, and oxidation induction time.
  • Material Certification:The polyethylene compound used for manufacturing PE gas pipes must comply with standard requirements to ensure reliable material performance.

7.Manufacturing Process Flow

  • Raw Material Preparation:PE80 or PE100 grade polyethylene compound is used as the raw material.
  • Extrusion Molding:The raw material is heated, plasticized in an extruder, and formed into a tube shape through a die.
  • Cooling and Sizing:The formed pipe is cooled to set its shape and dimensions.
  • Haul-off and Cutting:The pipe is cut to the required lengths.
  • Quality Inspection:The pipe dimensions, appearance, and performance are tested.
  • Marking and Packaging:Product information is printed on the pipe, followed by packaging.

8.Packaging and Delivery

  • Packaging Method:PE gas pipes are typically packaged with appropriate protective measures to prevent damage during transportation and storage.
  • Delivery Assurance:We ensure timely product delivery and provide complete product identification and technical documentation.
9.Sales Service
  • Pre-Sales Service:Provision of technical consultation, product selection guidance, and design proposal support.
  • During-Sales Service:Provision of detailed product technical documentation and, when necessary, installation technical guidance.
  • After-Sales Service:Establishment of a customer feedback mechanism for timely response to client inquiries.
10.Company Strengths
  • Production & Technical Capability:Possession of advanced production equipment and a team of professional technical personnel.
  • Quality Assurance:Implementation of a comprehensive quality management system to ensure products meet standard performance requirements.
  • Professional Expertise:Extensive production experience and specialized knowledge in the field of PE gas pipes.
  • Service Network:Provision of comprehensive technical support and customer service.
Zhongcai(Sancai) Pipe has 20 years of industry experience and serves over 500 customers worldwide. Its advantages include:
  • Advanced production capacity: Automated production line with an annual output of over 100000 tons, meeting large-scale demand. R&D Strength: Collaborate with universities to continuously innovate products, such as anti-static PE pipes. Customer case: Successfully participated in the Asian municipal water supply project, with a customer satisfaction rate of 98%. Environmental Commitment: Use recyclable materials, reduce carbon footprint, and support green buildings.
  •  Strict quality control: Establish a sound quality management system, implement full process quality monitoring from raw material procurement to product delivery, and rigorously inspect every link to ensure reliable product quality.
  • Rich industry experience: With years of deep cultivation in the pipe and fittings industry, we have accumulated rich project experience and successfully served numerous large-scale municipal, construction, industrial and other projects, winning widespread recognition and praise from customers.

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