Heat Shrink Jointing Kits (Telecom & Railways)
Heat shrink jointing kits designed for telecom and railway cable systems, providing reliable insulation, sealing, and protection across QUAD, PIJF, and signalling cable applications. All kits are RDSO approved.
Purpose-Built for Telecom and Railway Cable Infrastructure
Western Cablex heat shrink jointing kits for telecom and railway applications are engineered to address the specific installation and sealing requirements of QUAD, PIJF, and signalling cable types. Each kit delivers a reliable, moisture-sealed joint that maintains the electrical continuity and insulation performance of the cable system — in both direct-buried and ducted installation environments.
All kits in this range carry RDSO approval — confirming compliance with Indian Railways' technical specifications for signalling and telecom cable accessories. This makes them directly specifiable for railway infrastructure projects without separate qualification or product testing at the project level.
- Cable types QUAD, PIJF, Signalling
- Approval RDSO Approved
- Joint type Straight through and Branch
- Conductor Copper
- Installation Heat shrink — hot air gun
- Application Railway and Telecom
Types of Jointing Kits
Three kit types covering the principal cable categories used across Indian Railways telecom and signalling infrastructure.
QUAD Cable Jointing Kits
Insulation recovery, moisture sealing, and mechanical protection for QUAD (Quadded) telecom cables used in railway and long-distance telecom networks.
PIJF Cable Jointing Kits
Jelly-sealed jointing for PIJF (Petroleum Insulated Jelly Filled) cables — preventing jelly migration and maintaining the moisture barrier at the joint zone.
Signalling Cable Jointing Kits
Reliable insulation, inter-core isolation, and long-term moisture exclusion for multi-core railway signalling cables on mainline, metro, and station infrastructure.
Why These Kits Are Specified
Designed specifically for the installation requirements and approval obligations of railway and telecom cable infrastructure projects.
Purpose-Built for Telecom and Railway Systems
Kits are engineered for the specific cable constructions used in railway and telecom infrastructure — not adapted from power cable jointing products. Components are dimensioned and specified for QUAD, PIJF, and signalling cable geometries.
RDSO Approved
Approved by the Research Designs and Standards Organisation — the statutory technical body for Indian Railways standards. RDSO approval allows direct specification in railway projects without separate product qualification at the project level.
Reliable Insulation and Core Isolation
Heat-shrinkable insulation components recover tightly over spliced pairs and conductors — maintaining inter-core isolation and electrical continuity across the joint in service conditions that include temperature cycling and mechanical vibration.
Moisture Protection
Outer sealing components form a continuous moisture barrier around the completed joint — protecting spliced conductors from groundwater, condensation, and humidity ingress in buried and exposed installation environments.
Mechanical Durability
Outer jacket and oversheath materials withstand the mechanical demands of direct-buried and ducted installation — including backfill compaction forces, ground movement, and long-term soil contact without degradation.
Field-Proven Performance
Installed across mainline, metro, and telecom access network projects — with a proven track record of reliable field installation by trained railway and telecom cable jointing teams.
System & Performance Data
Reference data for engineering and procurement. Contact our technical team for RDSO approval documentation or project-specific data.
| Compatible cable types | QUAD (Quadded), PIJF (Petroleum Insulated Jelly Filled), Signalling cables |
|---|---|
| Conductor material | Copper |
| Joint type | Straight through and Branch (T-joint) configurations available |
| Insulation system | Heat-shrinkable crosslinked polyolefin — individual conductor and overall joint insulation |
| Sealing system | Adhesive-lined heat-shrinkable outer tube and mastic tape — continuous moisture barrier over joint body |
| Installation method | Heat shrink — hot air gun application, no resin or cold-applied components |
| Approval | RDSO Approved — Research Designs and Standards Organisation, Indian Railways |
| Application environment | Direct buried, ducted, aerial (where applicable) — railway trackside and telecom routes |
| Applicable standards | RDSO specifications for signalling and telecom cable accessories — confirm drawing number per cable type |
Typical Kit Components
Each kit is supplied as a complete, pre-packaged system. Component count and type vary by cable type and core configuration.
Individual Conductor Tubes
Heat-shrinkable insulation tubes applied over each spliced conductor pair — providing individual conductor insulation and inter-core isolation at the splice zone.
Bundle Insulation Tube
Intermediate heat-shrinkable tube applied over the grouped splice bundle — providing a secondary insulation layer and mechanical support around all conductors before the outer sealing system is applied.
Outer Sealing Tube
Adhesive-lined heat-shrinkable outer tube that forms the primary moisture seal over the completed joint body — bonding to the cable jacket at both ends to prevent groundwater and humidity ingress into the splice zone.
Mastic Sealing Tape
Self-amalgamating or butyl mastic tape applied at the cable entry points of the outer tube — filling voids and creating a waterproof seal at the interface between the outer tube and the cable jacket on each side of the joint.
Crimp Connectors / Splice Connectors
Copper crimp or butt connectors for joining individual conductor pairs at the splice zone — selected to match the conductor cross-section and count of the cable type being jointed.
Installation Accessories
Cleaning wipes, cable preparation materials, cable ties, and installation instruction documentation — supplied within the kit to ensure all materials required for a complete installation are available at the joint location.
Exact kit contents vary by cable type, pair count, and joint configuration. Contact our technical team for the full component schedule for your specific cable and application.
Where These Kits Are Used
Installed across railway and telecom cable networks wherever RDSO-approved jointing is required or field jointing of QUAD, PIJF, and signalling cable types is specified.
Railway Signalling Networks
Jointing of signalling cables across mainline and suburban railway routes — supporting signalling, control, and interlocking systems where RDSO compliance is a mandatory procurement requirement.
Metro Rail Projects
Signalling and communication cable jointing for metro rail infrastructure — including underground, elevated, and at-grade sections where cable jointing quality and seal integrity are critical to system reliability.
Telecom Access Networks
PIJF and QUAD cable jointing for last-mile and backbone telecom access networks — including direct-buried cable routes, duct-installed cable runs, and cable distribution point joints.
Broadband Infrastructure
PIJF cable jointing for broadband access and PSTN network infrastructure — supporting exchange-to-cabinet and cabinet-to-premises cable distribution in urban and semi-urban deployments.
Communication Systems
Jointing kits used for railway OFC and telecom cable systems alongside dedicated communication cable routes — covering both copper pair and ancillary cable jointing requirements at lineside and station locations.
Infrastructure and EPC Projects
RDSO-approved kits supplied to EPC contractors for railway project signalling and telecom works — providing a compliant, pre-approved product that meets Indian Railways procurement requirements without additional qualification.
How to Select the Right Jointing Kit
Four parameters determine the correct kit. Confirm each before ordering to ensure the kit matches the cable and project requirements.
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01
Cable Type
Confirm whether the cable is QUAD, PIJF, or a signalling cable type. This is the primary selection parameter — each kit is designed for a specific cable construction and cannot be substituted across cable types. For PIJF cables, also confirm whether the cable is jelly-filled (standard) or dry — this may affect the sealing component requirements within the kit.
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02
Cable Size and Pair Count
Specify the cable outer diameter and the number of conductor pairs or cores. Kit component dimensions — particularly the outer sealing tube — are sized to the cable outer diameter. For multi-pair cables, the bundle tube and connector count within the kit are matched to the pair count. Provide the cable designation or drum label details when ordering.
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03
Application and Installation Environment
Confirm whether the joint is direct-buried, duct-installed, or aerial — and whether the installation is on a railway trackside route, a telecom access network, or a general infrastructure cable route. This determines any additional mechanical protection or outer casing requirements that may be specified alongside the heat shrink kit.
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04
Approval Requirement
For Indian Railways projects, confirm that the project specification requires RDSO-approved products. Western Cablex jointing kits carry RDSO approval and can be supplied with the relevant approval documentation for inclusion in project submission packages. Contact our technical team if RDSO approval certificates or vendor registration documentation are required.
For cable types not listed above, or for projects with non-standard cable constructions, contact our technical team with the full cable specification before ordering.
Common Technical Questions
RDSO — the Research Designs and Standards Organisation — is the statutory technical body responsible for developing and maintaining standards for Indian Railways. Products used in railway signalling and telecom cable systems must conform to RDSO specifications to be eligible for procurement under Indian Railways contracts and projects. RDSO approval confirms that the product has been tested and verified against the relevant specification by the certifying authority. For EPC contractors and project teams, using RDSO-approved products eliminates the need for project-level product qualification and simplifies the technical submission process.
QUAD cables use a twisted quad conductor arrangement and are primarily used in railway and long-distance telecom networks. PIJF (Petroleum Insulated Jelly Filled) cables use individual petroleum-insulated conductors with a flooding gel that fills the cable interstices to prevent moisture migration. The jointing kit for PIJF cables must address the jelly-filled construction by incorporating sealing materials that prevent gel migration out of the cable at the joint preparation zone and seal the cable ends effectively against moisture ingress. QUAD cable kits do not require the same gel-management approach but must address the quad grouping and pair-level isolation of that cable construction. Using a QUAD kit on a PIJF cable — or vice versa — will result in an inadequate installation.
Yes — kits are available for both straight-through and branch (T-joint) configurations. Straight-through kits are used to join two cable ends in line, typically for cable extension or fault reinstatement. Branch kits allow a distribution tap to be taken from a main cable run. The two configurations require different outer tube geometries and sealing arrangements — specify the required joint type clearly when ordering as the kits are not interchangeable.
The primary installation tool is a hot air gun for heat shrink component recovery. A hand or ratchet crimping tool compatible with the supplied crimp connectors is required for conductor splicing. Cable preparation tools — including strippers, cutters, and cleaning materials — are required at the joint preparation stage. For PIJF cables, tools for managing the jelly filling during preparation are additionally required. Full installation instructions are supplied with each kit. For teams undertaking RDSO-specified railway works, installation should be carried out by personnel familiar with the RDSO installation requirements for the applicable cable type.
Yes. Western Cablex can provide RDSO approval certificates and related documentation for inclusion in project technical submissions and procurement packages. For railway projects requiring vendor registration or product pre-qualification, our technical and commercial team can assist with the required documentation. Contact us with the specific RDSO drawing number and project details when making a documentation request.
Western Cablex jointing kits are available across a standard range of cable sizes and pair counts covering the principal cable specifications used in Indian Railways and telecom deployments. For cables outside this range — including higher pair count cables, non-standard constructions, or cables with unusual outer diameters — contact our technical team with the full cable specification. We can confirm availability within the standard range or identify a solution for non-standard requirements.
Need Help Selecting the Right Jointing Kit?
Speak with our technical team for cable compatibility confirmation, RDSO documentation, and project supply enquiries.