HDPE double wall corrugated drainage pipe

HDPE corrugated pipe outer wall structure

HDPE pipe with rubber ring socket connection

HDPE double wall pipe for municipal drainage

HDPE double wall pipe for stormwater systems

HDPE corrugated pipe for underground sewage networks

HDPE Double Wall Corrugated Pipe

HDPE double-wall corrugated pipe is a new type of plastic piping manufactured from high-density polyethylene (HDPE) using an extrusion process. Featuring a smooth inner wall and an annularly corrugated outer structure, it combines advantages such as high ring stiffness, light weight, corrosion resistance, and ease of installation. It is a mainstream piping choice for projects including municipal drainage and sewage systems, separate storm and sanitary sewer networks, residential piping networks, and agricultural irrigation.

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Product Overview

Product Features

Robust Structure & High Ring Stiffness:The corrugated outer wall significantly enhances compressive and impact resistance, making the pipe suitable for underground road installations and heavy-load soil coverage without deforming or collapsing.
Smooth Inner Wall & Efficient Drainage: The smooth, burr-free inner surface minimizes fluid resistance and maximizes water transport and sewage discharge capacity; it resists sediment buildup and clogging, ensuring stable flow rates over the long term.
Corrosion Resistance & Long Service Life: Made of polyethylene, the pipe resists acids, alkalis, sewage corrosion, and soil erosion; it does not rust or scale, offering a normal service life of over 50 years.
Lightweight & Rapid Installation: Lighter than concrete or cement pipes, making handling and installation less labor-intensive; utilizes reliable rubber-ring socket connections for high construction efficiency and shorter project timelines.
Flexibility & Settlement Resistance: High toughness allows the pipe to accommodate slight, uneven ground settlement without fracturing, offering superior seismic performance compared to traditional piping materials.
Eco-friendly & Pollution-free: Manufactured from non-toxic, odorless, and recyclable materials, the product is environmentally friendly and meets municipal engineering standards for environmental protection.

Product Specifications & Parameters

Nominal diameter (DN/ID)

Nominal Inner Diameter DN/ID (mm)	Minimum Mean Inner Diameter (mm)	Minimum Engagement Length (mm)	Minimum Laminated Wall Thickness (mm)	Minimum Inner Layer Wall Thickness (mm)
200	198	54	1.5	1.1
300	296	65	2	1.7
400	394	74	2.5	2.3
500	492	85	3	3
600	588	96	3.5	3.5
800	785	118	4.5	4.5

Applicable Standards

Ring Stiffness Classes (National Standard GB/T 19472.1)

SN4: Suitable for green belts, residential complexes, and non-motorized vehicle lanes.
SN8: Suitable for municipal roads, arterial roads, and heavy-load pavements (mainstream/common usage).
SN12.5, SN16: Suitable for deep burial, heavy loads, and special engineering projects.

Standard Length

Standard 6 meters per pipe; Connection method: Socket-and-spigot connection sealed with an elastic rubber ring.

Applicable Standards

GB/T 19472.1-2019 "Polyethylene (PE) structural wall piping systems for underground use – Part 1: Polyethylene double-wall corrugated pipes"

Scope of Application

Municipal Engineering: Urban rainwater and sewage pipe networks; rainwater-sewage separation retrofitting.
Building Complexes: Drainage and sewage systems for residential areas, commercial districts, and industrial sites.
Transportation Engineering: Highway and railway culverts; roadbed drainage.
Agricultural Water Conservancy: Farmland irrigation and waterlogging drainage networks.
Others: Chemical wastewater discharge; river channel remediation; "Sponge City" construction.

Installation Essentials

Excavate and level the trench, compact the base, and lay a sand/gravel bedding layer if necessary.
Orient the pipe socket upstream; apply lubricant to the spigot and ensure the rubber ring is correctly installed.
Ensure tight joints and conduct a hydrostatic (water-tightness) test; backfilling may only proceed if there is no leakage.
Compact backfill soil in layers; prevent sharp, hard objects from directly striking the pipe.