Pipe characteristics
| Property | Unit | Value |
|---|---|---|
| Annular stiffness | kN/m² | ≥ 4 |
| Resistance to heating | min | ≥ 30 |
| Annular flexibility | % | ≥ 30 |
| Gasket tightness | bar | 0.5 |
| Impact resistance (0 °C) | TIR | < 10% |
Structured PK Sewer Pipe SN4 PipeKorr – Double-wall corrugated HDPE
NTET manufactures the PipeKorr system: double-wall structured pipes made of high-density polyethylene (HDPE) for buried non-pressure sewer networks. The smooth inner wall ensures excellent hydraulic conductivity, while the corrugated outer wall provides high annular stiffness.
The SN4 class (annular stiffness ≥ 4 kN/m²) is certified according to UNI EN 13476-3 by a third-party certification body accredited to ISO/IEC 17065. Connection between elements is made by means of a socket or coupling sleeve with EPDM gasket compliant with EN 681-1.
Dimensional ranges
The PK Sewer SN4 range covers nominal diameters from DN 125 to DN 1200 mm, divided into two dimensional series with dedicated technical data sheets.
The PK Sewer SN4 range covers nominal diameters from DN 125 to DN 1200 mm, divided into two dimensional series with dedicated technical data sheets.
| Parameter | Value | Unit |
|---|---|---|
| DN/OD 125 → DN/ID 106 | L 6,48 m | Leff 6,39 m |
| DN/OD 160 → DN/ID 137 | L 6,47 m | Leff 6,37 m |
| DN/OD 200 → DN/ID 172 | L 6,45 m | Leff 6,32 m |
| DN/OD 250 → DN/ID 215 | L 6,43 m | Leff 6,28 m |
| DN/OD 315 → DN/ID 270 | L 6,40 m | Leff 6,23 m |
| DN/OD 400 → DN/ID 343 | L 6,38 m | Leff 6,18 m |
| DN/OD 500 → DN/ID 430 | L 6,35 m | Leff 6,12 m |
| DN/OD 630 → DN/ID 540 | L 6,35 m | Leff 6,11 m |
Large diameter range for collectors and primary sewer networks. It includes 3 sizes from DN/OD 800 mm to DN/OD 1200 mm, with bars approximately 6.10–6.30 m long.
| Parameter | Value | Unit |
|---|---|---|
| DN/OD 800 → DN/ID 686 | L 6,30 m | Leff 6,00 m |
| DN/OD 1000 → DN/ID 856 | L 6,27 m | Leff 5,90 m |
| DN/OD 1200 → DN/ID 1030 | L 6,10 m | Leff 5,74 m |
Technical specifications
Structure and material
- Material: High-Density Polyethylene (HDPE)
- Structure: Double wall — smooth inside, corrugated outside (type B)
- Colour: Black (both walls)
- Nominal diameter: DN/OD (outside diameter)
Connection
Integrated socket or coupling sleeve with EPDM sealing gasket compliant with EN 681-1. The pipe + jointing system is certified as a unit according to UNI EN 13476-3.
Certifications and compliance
- Product standard: UNI EN 13476-3
- Quality mark: IIP / UNI (body accredited to ISO/IEC 17065)
- Quality system: UNI EN ISO 9001
- Environmental system: UNI EN ISO 14001
- Consortium: Ecopolietilene (Legislative Decree 152/2006 – art. 234)
- Sustainability: ESG Report compliant with GRI Standards 2021, certified by a third-party body
- Ethics: Code of ethics and Legislative Decree 231/01 model
Technical documentation
Scarica le schede tecniche del tubo strutturato PK Fognatura SN4, suddivise per gamma dimensionale.
Applications
The PipeKorr SN4 system is designed for buried non-pressure drainage networks, with predominant use in civil and infrastructure applications.
-
Civil sewerage
Collection and drainage networks for domestic wastewater in urban and residential areas. Diameters DN 125–400 cover connections and secondary sections.
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Sewer collectors
Primary sewer networks and large-diameter collectors (DN 500–1200) for conveyance to wastewater treatment plants.
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Industrial sewerage
Drainage networks for industrial and commercial areas, with high flow rates and the need for mechanical resistance at depth.
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Stormwater and rainwater
Collection and disposal systems for rainwater and runoff in road and infrastructure applications.
FAQ
SN4 indicates an annular stiffness ≥ 4 kN/m², suitable for standard installation depths. SN8 (≥ 8 kN/m²) is intended for greater depths or soils with higher loads. Both classes comply with UNI EN 13476-3.
For dimensional clarity: the STN0FSN40000 sheet covers diameters from DN 125 to DN 630 (8 sizes, connections and secondary networks), while STN0FSN40001 covers DN 800 to DN 1200 (3 sizes, collectors and primary networks). The mechanical characteristics are identical.
By means of an integrated socket or a coupling sleeve, both equipped with an EPDM gasket compliant with EN 681-1. The system ensures tightness at 0.5 bar.
Yes. The pipe + jointing system bears the IIP/UNI mark for compliance with UNI EN 13476-3, issued by a body accredited to ISO/IEC 17065. The company is certified to ISO 9001 and ISO 14001.
The total length (L) varies from approximately 6.10 m to 6.48 m depending on the diameter. The effective length (Leff, net of the socket) ranges from 5.74 m to 6.39 m. Refer to the tables in the technical data sheets for exact values.
