Yellow pe gas pipe is a high-performance plastic pipe specially designed for gas transmission system. With its eye-catching yellow appearance and excellent performance, it has become an important part of the urban gas pipeline network. This pipe is made of high-density polyethylene (HDPE) material, and standardized color identification is achieved by adding yellow masterbatch.
Basic characteristics:
Color identification: bright yellow (RAL 1021 standard color) for easy identification and distinction
Material grade: mainly PE80 and PE100 raw materials
Pressure level: design pressure is usually below 0.4MPa (medium and low pressure system)
Temperature range: -20℃ to 40℃ (special formula can be extended to -40℃)
Service life: design life of more than 50 years
1. Outstanding safety performance
Strong corrosion resistance: completely resist electrochemical corrosion and chemical corrosion
Excellent toughness: good impact resistance, no breakage at low temperature
Low leakage risk: hot-melt connection forms an overall system, no interface leakage
Antistatic design: avoid static electricity accumulation and cause danger
2. Construction and maintenance advantages
Light weight: the density is only 1/8 of that of steel pipe, and transportation and installation are convenient
Good flexibility: it can be supplied in coils to adapt to terrain changes
Reliable connection: electric fusion/hot-melt connection forms a molecular-level bond
Maintenance-free: no cathodic protection is required, and the maintenance cost is extremely low
3. Economic and environmental protection characteristics
Low comprehensive cost: the installation cost is 30-50% lower than that of metal pipes
Good hydraulic performance: smooth inner wall, high transmission efficiency
Environmental protection and energy saving: low production energy consumption, recyclable materials
Quick construction: no welding anti-corrosion, construction period shortened by 40%
1. Main international and domestic standards
Chinese standard: GB 15558.1-2015 "Buried polyethylene (PE) pipe system for gas Part 1: Pipes"
International standard: ISO 4437 "Buried polyethylene pipe system for gas"
European standard: EN 1555 "Plastic pipe system for gas supply - Polyethylene (PE)"
{C}2. {C}Key performance indicators
|
Item |
PE80 Standard |
PE100 Standard |
|
Minimum Required Strength (MRS) |
8.0 MPa |
10.0 MPa |
|
Short-Term Hydrostatic Strength (20°C) |
≥9.0 MPa |
≥12.4 MPa |
|
Elongation at Break |
≥350% |
≥350% |
|
Oxidation Induction Time (200°C) |
≥20 min |
≥20 min |
3. Specifications
Diameter range: DN20-DN400 (DN63-DN200 is common)
SDR series: SDR11, SDR17, SDR21, etc.
Length: Straight pipe is usually 6m/9m/12m, coil can reach more than 100m
1. Urban gas transmission and distribution system
Medium and low pressure pipeline network trunk lines
Residential courtyard pipeline network
Industrial user dedicated line
2. Special application scenarios
Crossing projects: directional drilling through rivers and roads
Earthquake-prone areas: using the flexibility of PE pipes to resist crustal movement
Corrosive soil: replacing easily corrosive metal pipes
Sensitive areas: hospitals, schools and other places with high safety requirements
{C}3. {C}Comparison with other pipes
|
Property |
PE Gas Pipe |
Steel Pipe |
Cast Iron Pipe |
|
Corrosion Resistance |
★★★★★ |
★★☆ |
★★★☆ |
|
Flexibility |
★★★★★ |
★★☆ |
★☆☆ |
|
Connection Reliability |
★★★★★ |
★★★☆ |
★★★☆ |
|
Service Life |
50+ years |
20-30 years |
15-25 years |
|
Installation Cost |
Low |
High |
Medium |
1. Connection process
Electric fusion connection: suitable for DN≤90mm pipes, easy to operate
Hot-melt connection: suitable for DN≥90mm pipes, high connection strength
Steel-plastic conversion: transition joint connected to metal pipes
2. Burial requirements
Buried depth specification:
≥0.9m under motor vehicle lanes
≥0.6m under non-motor vehicle lanes
≥0.5m in courtyard areas
Groove treatment: foundation cushion layer, backfill sand protection
Tracer line: parallel laying of metal tracer line (150-300mm from the top of the pipe)
3. Special area treatment
Rock area: 10cm thick sand cushion layer is laid at the bottom of the trench
High water level area: counterweight blocks are used to prevent the pipeline from floating
Crossing area: casing protection is added
1. Factory inspection items
Appearance quality (color, surface defects)
Dimension measurement (diameter, wall thickness, ovality)
Hydrostatic test (short term)
Melt mass flow rate (MFR)
Oxidation induction time (OIT)
2. Key points for on-site acceptance
Product identification inspection (manufacturer, specification, standard number, etc.)
Quality certification documents (certificate of conformity, test report)
Color uniformity (all yellow, no mixed color stripes)
3. System pressure test
Strength test: 1.5 times the design pressure, stable pressure for 1 hour
Tightness test: 1.15 times the design pressure, continuous for 24 hours
Sun protection: UV protection is required for outdoor laying
Temperature limit: Avoid use in high temperature environment (＞40℃)
Mechanical protection: Add protective sleeves in areas susceptible to external impact
Compatibility check: Ensure that the connector material matches the pipe material
Regular inspection: Focus on checking exposed parts and connection points
Yellow PE gas pipe is gradually replacing traditional metal gas pipes worldwide with its comprehensive performance advantages. With the advancement of material technology and construction technology, this safe and reliable gas transportation solution will play a more important role in urban infrastructure. Correct selection, installation and maintenance of yellow PE gas pipes are key guarantees for building a safe and efficient gas system.
