Structured-wall · Type B
Steel-Wire-Reinforced HDPE Structured-Wall Pipe (Type B)
Structured wall with steel-wire-reinforced ribs
Type B Steel-Wire-Reinforced HDPE Structured-Wall Pipe is a spiral-wound gravity pipe with a smooth polyethylene inner layer and hollow ribs reinforced with steel wire. Shunfang publishes sizes from DN160 to DN5000 in ring stiffness SN12.5 and SN16, and can make up to 6 m for specific projects.
- Wall construction
- Structured wall with steel-wire-reinforced hollow ribs, spiral-wound
- Nominal diameter
- DN160–DN5000 published; up to 6 m by project
- Ring stiffness (SN)
- SN12.5, SN16
- Material
- Virgin PE100 / PE80; no recycled material
Last updated . Reviewed by Shunfang Engineering Team
Technical specifications
| Type | Type B |
|---|---|
| Wall construction | Structured wall with steel-wire-reinforced hollow ribs, spiral-wound |
| Inner surface | Smooth PE layer |
| Outer surface | Ribbed, with bonded PE protection |
| Reinforcement | Carbon spring-steel wire in the ribs, above 1800 MPa tensile strength |
| Nominal diameter | DN160–DN5000 published; up to 6 m by project |
| Ring stiffness (SN) | SN12.5, SN16 |
| Material | Virgin PE100 / PE80; no recycled material |
| Standard | T/CWEC 10-2019; GB/T 19472.2-2017 |
| Jointing | Heat-shrink sleeve, sealed socket, butt fusion, electrofusion band |
| Duty | Gravity flow |
Physical performance requirements
| Item | Value | |
|---|---|---|
| Appearance | — | Smooth, uniform appearance |
| Tensile strength | MPa | ≥ 20 |
| Elongation at break | % | ≥ 200 |
| Flexural modulus | MPa | ≥ 1500 |
| Ring stiffness, SN12.5 | kN/m² | ≥ 12.5 |
| Ring stiffness, SN16 | kN/m² | ≥ 16 |
| Impact resistance | % | ≤ 10 |
| Creep ratio | % | ≤ 3 |
| Ring flexibility | — | No reverse bending or cracking |
| Oven test | — | No bubbles, delamination or cracking |
| Oxidation induction time (OIT) | min | ≥ 30 |
| Longitudinal reversion | % | ≤ 3, no delamination or cracking |
Construction and manufacturing
- Smooth PE inner layer: the flow surface.
- Steel-wire-reinforced hollow rib: the structural part, with the wires fully encased in PE.
- Bonded outer PE protection.
- A screw extruder forms double-chamber ribbed strips with steel wire embedded.
- The strips are spiral-wound and hot-bonded into one wall.
- Outer wire and PE protection layers are added.
Cutaway of an HDPE structured-wall pipe profile 
Close view of a steel-reinforced PE structured-wall rib profile 
Section of a hollow rib showing the embedded steel wires 
Steel-wire-reinforced wall section
Materials
- Virgin PE100/PE80 high-molecular-weight polyethylene; no recycled material.
- Carbon spring-steel wire above 1800 MPa tensile strength.
Sizes and ratings
Scroll sideways to see all columns
| Nominal diameter dnmm | Min. average inside diametermm | Min. inner-layer wall thicknessmm |
|---|---|---|
| 160 | 155 | 1.3 |
| 200 | 195 | 1.5 |
| 250 | 245 | 1.8 |
| 300 | 294 | 2.0 |
| 400 | 392 | 2.5 |
| 450 | 441 | 2.8 |
| 500 | 490 | 3.0 |
| 600 | 588 | 3.5 |
| 700 | 673 | 4.0 |
| 800 | 785 | 4.5 |
| 900 | 885 | 5.0 |
| 1000 | 985 | 5.0 |
| 1100 | 1085 | 5.0 |
| 1200 | 1185 | 5.0 |
| 1300 | 1285 | 5.0 |
| 1400 | 1385 | 5.0 |
| 1500 | 1485 | 5.0 |
| 1600 | 1585 | 5.5 |
| 1700 | 1685 | 5.5 |
| 1800 | 1785 | 6.0 |
| 1900 | 1885 | 6.0 |
| 2000 | 1985 | 6.0 |
| 2100 | 2085 | 6.0 |
| 2200 | 2185 | 7.0 |
| 2300 | 2285 | 8.0 |
| 2400 | 2385 | 9.0 |
| 2500 | 2485 | 10.0 |
| 2600 | 2585 | 10.0 |
| 2700 | 2685 | 10.0 |
| 2800 | 2785 | 10.0 |
| 2900 | 2885 | 10.0 |
| 3000 | 2985 | 10.0 |
| 3100 | 3085 | 10.0 |
| 3200 | 3185 | 10.0 |
| 3300 | 3285 | 10.0 |
| 3400 | 3385 | 10.0 |
| 3500 | 3485 | 10.0 |
| 3600 | 3585 | 11.0 |
| 4000 | 3985 | 12.0 |
| 4500 | 4485 | 13.0 |
| 5000 | 4985 | 14.0 |
Applications
- Stormwater DrainageLarge-flow urban stormwater lines
- Sewer & WastewaterMunicipal and industrial gravity sewers
- CulvertsBuried high-capacity flow paths
- Industrial EffluentCorrosive and process wastewater discharge
- Sea Outfall & IntakeCoastal discharge and intake lines, by project review
Features and benefits
- Steel-wire-reinforced ribs deliver SN12.5 and SN16.
- Hollow ribs save weight; the wires are fully encased in PE.
- Virgin PE100/PE80, with no recycled material.
- Resistant to acids, alkalis and salts.
- Up to 6 m by project, with on-site production assessed above 3 m.
Jointing and installation
Heat-shrink sleeve
A sleeve lined with hot-melt adhesive is heated to shrink and bond over both pipe ends.
Sealed socket joint
A spigot end with sealing rings enters the socket end and is pushed home.
Butt-fusion welding
Cleaned and squared ends are welded with butt-fusion equipment.
Electrofusion band
The band runs at least 1.2 turns along the rib groove; seams are finished by extrusion welding.
On-site production
For pipe above 3 m in diameter, factory delivery can be compared with manufacturing at the project site.
Standards and quality
- T/CWEC 10-2019Reinforced PE composite pipe · Product standard
- GB/T 19472.2-2017Buried PE structured-wall piping systems, part 2: spiral-wound structured-wall pipe · Product standard
Certified management systems
- ISO 9001:2015
- ISO 14001:2015
- ISO 45001:2018
Project references
| Project | Location | Specification |
|---|---|---|
| Malaysia Ulu Tubai drainage (highway construction) | Malaysia | DN1800 · SN16 |
| Jinan 2022 sewer–stormwater separation | Jinan, Shandong | DN300–DN600 · SN12.5 · 30 km |
Malaysia Ulu Tubai drainage (highway construction)DN1800 · SN16 
Jinan 2022 sewer–stormwater separationDN300–DN600 · SN12.5 · 30 km
Photos
Butt-fusion clamp rig on ribbed pipe 
Butt-fusion machine ready for jointing 
Field fusion station for large-diameter pipe 
Fit-up work inside a large-diameter pipe 
DN900 reinforced PE composite pipe installation reference 
Pipe stock photo for the Jinan drainage case 
Flexibility, corrosion and fatigue resistance, smooth walls 
Unlimited diameter 
Integrated wall 
Bending resistance and high ring stiffness 
Acid, alkali, salt and solvent resistance
Frequently asked questions
What is a steel-wire-reinforced HDPE structured-wall pipe?
It is a spiral-wound HDPE gravity pipe with a smooth polyethylene inner layer, hollow ribs reinforced with steel wire, and a bonded outer PE layer.
What is the largest diameter available?
The published size table runs to DN5000. Up to 6 m can be manufactured for a specific project after technical review.
What ring stiffness classes are available?
SN12.5 and SN16.
How does Type B differ from Type A?
Type B has ribs reinforced with steel wire; Type A is an all-polyethylene hollow wall with a smooth outer surface.
How are the pipes joined?
By heat-shrink sleeve, sealed socket joint, butt fusion or electrofusion band, chosen by diameter and site conditions.
Can it be produced on site?
For pipe above 3 m, on-site production can be assessed.
Compare with Type A: Hollow-Wall Spiral-Wound Pipe
| Parameter | Type B: Steel-Wire-Reinforced HDPE Structured-Wall Pipe | Type A: Hollow-Wall Spiral-Wound Pipe |
|---|---|---|
| Wall construction | Structured wall with steel-wire-reinforced hollow ribs, spiral-wound | Hollow wall, spiral-wound |
| Inner surface | Smooth PE layer | Smooth |
| Outer surface | Ribbed, with bonded PE protection | Smooth |
Need an all-polyethylene pipe with a smooth outer wall? See Type A.
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Export contact
Michael, Customer Manager
- +86 13609843896
- Phone
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