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HDPEFACTORYPE100 Pipe Manufacturer
Double-wall corrugated sewer pipe stacked across the yard, sorted by diameter

Drainage Pipe

Drainage & Sewer Pipe

Double-wall corrugated and solid-wall pipe for gravity sewer, culvert and stormwater systems.

Double-wall corrugated pipe seen end-on, the smooth blue bore inside the ribbed black outer wall

Our HDPE drainage pipe range covers double-wall corrugated (DWC) pipe for gravity applications and solid-wall pipe where pressure or fusion jointing is required. Corrugated pipe gives high ring stiffness at low weight, which cuts freight cost and lets a two-person crew handle DN600 sections without lifting gear.

Ring stiffness classes SN4, SN8 and SN16 are available, with socket-and-spigot rubber ring joints or electrofusion sleeves. For culvert and detention systems we also supply perforated pipe, geotextile-wrapped assemblies and matching manholes fabricated in-house.

Key features

  • DWC pipe DN100–DN1200, SN4 / SN8 / SN16
  • Solid-wall sewer pipe to DN1600 where fusion jointing is specified
  • Rubber-ring socket joints, electrofusion sleeves or butt fusion
  • Perforated and slotted options for subsoil drainage
  • Matching HDPE manholes and inspection chambers

Specifications

Drainage & Sewer Pipe technical specifications
Diameter rangeDN/ID 160 – DN/ID 800 (OD 110 – 800 mm)
Ring stiffnessSN4 ≥4, SN8 ≥8, SN12.5 ≥12.5 kN/m²
Impact (TIR)≤10%
Ring flexibilitySmooth sample, no reverse curvature, no cracking, walls stay bonded
Oven testNo blistering, delamination or cracking
Creep ratio≤4
StandardsGB/T 19472.1, EN 13476, ISO 21138
JointingRubber ring socket, electrofusion socket
Length6 m standard; other lengths to order
Design life50 years buried

Ring stiffness by diameter

Available ring stiffness classes for HDPE double wall corrugated pipe from DN/ID 160 to DN/ID 800
DN/ID (mm)Ring stiffness classes
160SN4, SN8, SN12.5
200SN4, SN8, SN12.5
225SN4, SN8, SN12.5
300SN4, SN8, SN12.5
400SN4, SN8, SN12.5
500SN8, SN12.5
600SN8, SN12.5
800SN8, SN12.5

SN4 is not produced above DN/ID 400 — at that diameter the wall needed for SN4 is thin enough that handling damage, not burial load, becomes the limit. Ask if you need a class not shown.

Corrugated pipe in stock

Frequently asked questions

Which ring stiffness class do I need — SN4, SN8 or SN16?
It follows burial depth and the load above. SN4 suits shallow, non-trafficked runs; SN8 is the usual choice under roads and is what most municipal specifications call for; SN16 is for deep burial or heavy axle loads. Bedding quality matters as much as the class — a well-compacted surround lets a lower class perform better than a poor one raises it.
Corrugated or solid wall?
Corrugated gives high ring stiffness at low weight and is cheaper for gravity flow, which covers most drainage. Choose solid wall when the line needs to hold pressure, when it will be fusion jointed into a continuous string, or when a smooth bore matters for cleaning and CCTV survey.
Are the rubber ring joints watertight?
They are rated for the low heads gravity systems see and are tested to the joint standard, but they are a mechanical seal, not a fused one. Where infiltration or exfiltration is the governing requirement — near groundwater, or in contaminated ground — specify electrofusion sleeves or solid-wall pipe with butt fusion instead.

Where this pipe goes to work

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