Description

• High-Grade Polyethylene MaterialThe pipe is manufactured from high-density polyethylene (PE) material compliant with ISO 4427 and GB/T 13663 standards. This material provides a stable molecular structure and validated long-term hydrostatic strength (LTHS), forming the basis for safe operation under rated pressure for the design life of a gas network.
• Complete Pressure and Diameter RangeThe product series covers a diameter spectrum from DN 20mm to 630mm and offers pressure ratings from SDR11 to SDR26 (PN6-PN16). This range provides a single-source solution for high-pressure mains, medium-pressure branches, and low-pressure service lines, simplifying material specification and procurement for gas projects.
• Leak-Free System via Heat Fusion JointingUsing butt or electrofusion techniques, joints are created with strength equal to the pipe body, resulting in a monolithic, leak-free pipeline system. This method eliminates leakage points inherent to mechanical joints, significantly raising the safety integrity level of the gas conveyance system.
• Inherent Resistance to Environmental StressThe HDPE material is inherently resistant to chemical and electrochemical corrosion, including from common soil acids, alkalis, salts, and stray currents. This property eliminates the need for external corrosion protection, preventing future leaks and associated maintenance costs stemming from corrosion failure.
• Flexibility and Impact ResistanceCompared to rigid pipes, HDPE maintains sufficient ring stiffness while offering notable flexibility. This allows the pipe to accommodate minor ground settlement and withstand normal handling impacts during transport and installation, reducing potential jobsite damage and material waste.
• Logistics-Optimized LengthsStandard lengths of 5.8 meters and 11.9 meters are offered. The 11.9-meter length is optimized for efficient stowage within standard 40-foot shipping containers, maximizing load efficiency. This design directly reduces the average shipping cost per unit, contributing to overall project cost control.

Scope of application

•  Municipal Natural Gas Distribution NetworksThis pipe is applied in public utility gas distribution systems. It is commonly used for buried gas mains and service lines, transporting processed natural gas at medium to low pressures from city gate stations to residential and commercial end-users. The availability of both SDR11 (higher pressure) and SDR17.6/SDR26 (standard pressure) ratings allows for its use in primary feeders, secondary loops, and final service connections within the same material specification.
• Industrial Plant Fuel Gas SupplyWithin industrial facilities such as chemical plants, manufacturing sites, or power generation units, this pipe serves as underground or above-ground (where protected) fuel gas supply lines. It transports natural gas used for process heating, steam generation, or co-generation. Its corrosion resistance is relevant for routing through typical industrial ground conditions, and its flexibility can simplify installation around existing infrastructure.
• LPG (Liquefied Petroleum Gas) DistributionThe pipe is suitable for the vapor phase lines in LPG distribution systems, including bulk plant outlets and distribution pipelines to satellite stations or large consumers. It carries LPG vapor at pressures within its rated PN range. The material's resistance to brittle fracture and slow crack growth is a relevant property for this application involving light hydrocarbons.
• Gas Transmission Pipeline Laterals & AppurtenancesFor larger gas transmission pipeline projects, this HDPE pipe can function as lateral take-off lines or utilities around compressor and regulator stations. It is used for lower-pressure auxiliary gas lines, odorant injection lines, or instrument gas supply, handling dry natural gas. The butt-fused joint integrity supports the safety requirements of such ancillary systems connected to high-pressure mains.

Key Engineering & Application Constraints

• Medium: Suitable for natural gas (methane) and LPG vapor (propane/butane). Not validated for non-fuel gases, liquids, or sour gas (high H2S content) without specific compatibility review.
• Pressure: Maximum allowable operating pressure is defined by the SDR rating and applicable design standard (e.g., PN16 for SDR11). Must not be exceeded.
• Temperature: Designed for continuous operation within the temperature range specified by the governing ISO 4427 standard for gas applications (typically -20°C to +40°C ambient for buried pipes).
• Installation: Primarily designed for buried installation. Above-ground installation requires protection from UV radiation and mechanical damage, following local fire and engineering codes.

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