Medium and Heavy Wall Tubing
S3(nh) Heavy Wall Halogen Free Heat Shrink Tube
Thickened halogen free polyolefin tubing where the same fire performance is needed with far more mechanical protection
- Operating temperature: -55 to 110°C
- Minimum fully recovery temperature: 125°C
- Shrink ratio: 3:1 & 4:1
- Halogen-free, RoHS compliant
- Single or Dual wall optional
- Standard Color: Black, Other colors optional
S3(nh) · Medium and Heavy Wall Tubing
Product Overview
What S3(nh) Does
Heavy wall halogen-free polyolefin shrink tubing, thickened design, with or without adhesive liner. Excellent insulation,mechanical protection and sealing of low voltage power cable joints and terminations.
Thickened halogen free polyolefin tubing where the same fire performance is needed with far more mechanical protection It is manufactured by Dalian United Polymer Material Co., Ltd. in Dalian China where radiation cross linking extrusion and molding are all performed in house under one quality system.
Key Benefits
- Heavy wall mechanical protection with halogen free fire behaviour
- 3:1 and 4:1 ratios so a single size covers a wide diameter span
- Operating range -55 to 110 °C for buried tunnel and outdoor service
- Adhesive lined option for a fully sealed buried joint
- Same installation technique as S3(n) so no additional crew training
Who It Is For
Who Benefits Most from S3(nh)
The buyers and site teams this product was designed around
Direct Buried Cable Contractors
A buried joint takes abrasion from backfill and ground movement for decades.
Mining and Quarry Electrical Teams
Trailing and reeling cable protection where mechanical abuse is continuous.
Metro and Tunnel Projects
Halogen free is mandatory and cable in a tunnel takes physical abuse during installation.
Port and Heavy Industry Maintenance
Cable in trafficked areas where crush and abrasion damage is routine.
Problems It Solves
Problems This Product Removes
Every one of these is a failure mode we have seen on real networks
Medium Wall Tubing Abrades Through in Buried and Trafficked Positions
The thickened heavy wall design gives a far greater abrasion allowance for the same shrink ratio.
Backfill Stones Puncture Thin Protection
A heavy wall absorbs point loading that would tear a medium wall tube.
Halogen Free Usually Means Giving up Toughness
S3(nh) keeps the halogen free formulation while adding wall thickness so neither requirement is compromised.
Two Products Means Two Stock Lines
S3(nh) uses the same shrink ratios and installation method as S3(n) so a crew that can fit one can fit the other.
Application Scenarios
Where It Is Used
Direct Buried Joint Protection
The outer mechanical and sealing layer on a buried LV or MV joint.
Duct and Trough Installations
Cable protection where it enters and leaves a duct.
Mining Trailing Cable Repair
Heavy duty jacket repair on abused cable.
Tunnel and Metro Cable Protection
Halogen free routes with mechanical exposure.
Port and Crane Cabling
Cable in trafficked and mechanically hostile areas.
Technical Data
Specifications and Dimensions
Test methods and requirements taken directly from the manufacturing specification
Technical Data
| Property | Test Method | Requirement |
|---|---|---|
| Tensile Strength | ASTM D2671 | ≥12 MPa |
| Ultimate Elongation | ASTM D2671 | ≥300% |
| Heat Aging (136°C/168h) Tensile Strength Ultimate Elongation | ASTM D2671 | ≥10 MPa ≥200% |
| Water absorption (23°C/24h) | ASTM D2671 | ≤0.5% |
| Low-temperature flexibility (-55°C/4h) | ASTM D2671 | No cracking |
| Heat shock (200°C/4h) | ASTM D2671 | No cracking, dripping or flowing |
| Dielectric strength | ASTM D2671 | ≥15 kV/mm |
| Volume resistivity | ASTM D2671 | ≥1.0×1014Ω·cm |
| Copper corrosion | ASTM D2671 | No corrosion |
Dimensions
| Size S3(nh) | As supplied(mm) Inner diameter D (min.) | After recovered (mm) Inner diameter d (max.) | Wall thickness t (nom.) | Standard length (m/pcs) |
|---|---|---|---|---|
| 9/3 | 9 | 3 | 2.5(with glue) | 1.0/1.22 |
| 13/4 | 12 | 4 | 2.8(with glue) | 1.0/1.22 |
| 16/5 | 16 | 5 | 3.0(with glue) | 1.0/1.22 |
| 19/6 | 19 | 6 | 2.6 | 1.0/1.22 |
| 22/6 | 22 | 6 | 3 | 1.0/1.22 |
| 25/8 | 25 | 8 | 3 | 1.0/1.22 |
| 28/6 | 28 | 6 | 3.4 | 1.0/1.22 |
| 33/8 | 33 | 8 | 3.4 | 1.0/1.22 |
| 35/12 | 35 | 12 | 4.1 | 1.0/1.22 |
| 40/12 | 40 | 12 | 4.1 | 1.0/1.22 |
| 45/13 | 45 | 13 | 4.2 | 1.0/1.22 |
| 55/16 | 54 | 16 | 4.3 | 1.0/1.22 |
| 65/19 | 65 | 19 | 4.4 | 1.0/1.22 |
| 75/22 | 75 | 22 | 4.4 | 1.0/1.22 |
| 85/25 | 85 | 25 | 4.5 | 1.0/1.22 |
| 95/29 | 95 | 29 | 4.5 | 1.0/1.22 |
| 105/30 | 105 | 30 | 4.6 | 1.0/1.22 |
| 115/34 | 115 | 34 | 4.6 | 1.0/1.22 |
| 130/36 | 130 | 36 | 4.8 | 1.0/1.22 |
| 140/42 | 140 | 42 | 4.8 | 1.0/1.22 |
| 160/50 | 160 | 50 | 4.8 | 1.0/1.22 |
| 175/58 | 175 | 58 | 4.8 | 1.0/1.22 |
| 200/65 | 200 | 65 | 4.8 | 1.0/1.22 |
| 230/75 | 230 | 75 | 4.8 | 1.0/1.22 |
| 260/85 | 260 | 85 | 4.8 | 1.0/1.22 |
CROSS REFERENCE · Tyco-Raychem: SST/WCSM / XCSM
Manufacturing and Quality
How It Is Made and Checked
Compounding extrusion radiation cross linking expansion and test all under one roof in Dalian
-
01
Compounding
Base polyolefin antioxidants flame retardants and functional fillers are mixed to a recipe held under our own formulation control rather than bought as a masterbatch.
-
02
Extrusion
The compound is extruded to the required wall and diameter. Co extruded products form two or three layers in a single pass so no interface can trap air.
-
03
Radiation Cross Linking
Electron beam irradiation creates the cross linked network that gives the material its shape memory. This step is what makes the product heat shrinkable.
-
04
Expansion
The cross linked part is heated expanded to its supplied diameter and cooled under tension so the expanded shape is locked in until heat is applied again.
-
05
Test and Inspection
More than 90 percent of product performance tests are carried out in our own laboratory including tensile elongation heat aging dielectric strength and tracking resistance.
-
06
Packing and Traceability
Each batch carries a production record so a delivered part can be traced back to its compound lot and process parameters.
Certification
ISO 9001:2015
Quality management system
IATF 16949:2016
Automotive quality management
ISO 14001:2015
Environmental management
ISO 45001:2018
Occupational health and safety
GJB 9001C-2017
Defence quality management
UL 224 E341796
Extruded insulating tubing
CE / RoHS
European conformity and restricted substances
CCS / ABS / DNV
Marine classification society approvals
Comparison
How S3(nh) Compares
An honest comparison so you can rule this product in or out quickly
| Requirement | S3(n) Medium Wall | S3(nh) Heavy Wall |
|---|---|---|
| Abrasion resistance | Standard | High |
| Buried joint protection | Adequate | Recommended |
| Shrink force | Standard | Higher |
| Cost per metre | Lower | Higher |
Use Guide
How to Select and Install S3(nh)
The sequence our engineers walk customers through on every first installation
-
01
Confirm the Mechanical Exposure
Choose heavy wall for buried trafficked or abrasive positions and medium wall for protected positions.
-
02
Size for the Largest Step
Heavy wall tubing has less flexibility so measure the largest diameter carefully.
-
03
Allow More Heat Time
A thicker wall takes longer to reach 125 °C throughout. Work steadily and do not rush the outer surface.
-
04
Use Adhesive Lined for Buried Work
Any buried joint should use the adhesive lined version so the ends are sealed.
-
05
Shrink from One End
Drive air ahead of the flame from one end to the other.
-
06
Inspect the Whole Length
Look for wrinkles trapped air and burn marks before backfilling.
FAQ
S3(nh) Frequently Asked Questions
The questions buyers ask before they place an order
How much thicker is heavy wall than medium wall
Does the thicker wall need a hotter torch
Is it suitable for direct burial
Can it be used on 36 kV cable
Is it halogen free like S3(n)
What colours are available
Still need an answer ask our engineers on WhatsApp
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