Roxtec RS PPS/S 68 AISI 316 Pipe Seal Kit

Roxtec RS PPS/S 68 AISI 316 Single-Side Marine Pipe Penetration Seal

The Roxtec RS PPS/S 68 AISI 316 (MPN: PPSS000006821) is a specialized, single-side entry penetration seal engineered for sealing single thermoplastic or composite pipes passing through A-Class fire-rated steel decks and bulkheads. Built with acid-proof AISI 316 stainless steel fittings and marine-grade halogen-free EPDM elastomer, this transit integrates Roxtec’s Multidiameter™ peelable layer technology around an inner intumescent core.

When exposed to localized heat during a fire event, the inner intumescent material activates and rapidly expands at high pressure, completely crushing the softening plastic pipe and sealing the aperture against flames, toxic combustion gases, and thermal transmission. Under standard operating conditions, tightening the compression bolts expands the elastomeric sealing body symmetrically against both the pipe wall and the inner bore of the sleeve, establishing a watertight and gastight barrier.

Model Details

• Manufacturer: Roxtec International AB
• System Family: RS PPS/S (Plastic Pipe Single-Side Seal)
• Model Designation: RS PPS/S 68 AISI 316
• Manufacturer Part Number (MPN / Art. No.): PPSS000006821
• Included Components: RS PPS/S 68 seal assembly, Multidiameter™ peelable rubber layers, integral intumescent wrap, central core plug, Roxtec Assembly Lubricant (25 ml pack).

Technical Specifications

Key Features

1. Thermal Intumescent Crush Mechanism: Integrated expanding matrix triggers under elevated temperatures to collapse plastic conduit, preventing flame path breach across fire divisions.
2. Single-Side Installation Configuration: Engineered for blind penetrations, service tunnels, and tight bulkhead pockets where dual-side access is structurally impossible.
3. Multidiameter™ Adaptability: Removable concentric elastomer layers adjust between 26.0 mm and 48.0 mm outer pipe diameters, accommodating pipe tolerance variances without field machining.
4. AISI 316 Acid-Proof Construction: Marine-grade stainless steel front/rear compression plates and fasteners eliminate pitting and galvanic corrosion in aggressive salt-fog offshore atmospheres.
5. Integrated Gas and Water Pressure Ratings: Delivers reliable barrier performance under operational vibration, dynamic hull deflections, and washdown scenarios.

Compatibility

Carrier Pipe Materials

• Polyethylene (PE / HDPE / MDPE)
• Polypropylene (PP)
• Polyvinyl Chloride (PVC / cPVC)
• Acrylonitrile Butadiene Styrene (ABS)
• Polybutylene (PB)
• Multilayer composite plastic sanitary and drainage piping

Applications

• Commercial Marine Vessels: Deck and bulkhead penetrations for black/grey water sanitary drains, scuppers, potable water distribution, and chilled-water HVAC circuits across A-60 boundaries.
• Offshore Oil & Gas Platforms: Living quarter modular accommodations, utility modules, and process deck drainage networks where weight savings necessitate thermoplastic piping without compromising passive fire boundaries.
• Naval Auxiliary & Patrol Craft: Shock-resistant, vibration-damped pipe penetrations across watertight compartments.
• Industrial & Hazardous Environments: Chemical and wastewater process lines passing through ATEX/explosion-zoned containment partitions where chemical resistance (AISI 316) is mandatory.

Frequently Asked Questions

What differentiates the Roxtec RS PPS/S from a standard Roxtec RS seal?

The standard RS seal is engineered exclusively for non-combustible steel, copper, or brass pipes and electrical cables. The RS PPS/S incorporates an expanding intumescent graphite matrix specifically designed for thermoplastic pipes. During a fire, plastic pipes burn away; the intumescent core expands to fill the void, which a standard EPDM seal cannot do.

Can the RS PPS/S 68 be installed if the sleeve is only accessible from one side?

Yes. The “PPS/S” designation indicates a Single-Side configuration. Unlike the dual-side back-to-back RS PPS seal, the RS PPS/S is specifically designed, tested, and certified for single-side insertion into decks or bulkheads.

What happens if the pipe diameter is near the boundary limit (e.g., 26 mm or 48 mm)?

The seal covers that entire spectrum. If your pipe is 26 mm, leave the majority of the Multidiameter layers in place. If your pipe is 48 mm, peel the layers down to the outer perimeter base. Always verify a snug fit without cutting into the structural frame.

Is the RS PPS/S 68 suitable for potable water pipe transits?

Yes. The halogen-free EPDM elastomer does not contaminate water lines, and the clamping mechanism works mechanically on the pipe exterior without penetrating the pipe wall or contacting internal drinking water.

Can the center core be left in place if the transit is a future spare?

Yes. The central rubber plug allows the RS PPS/S 68 to serve as a pre-installed blind transit seal. When the vessel requires additional routing, release the bolts, remove the center core, fit the plastic pipe, and re-torque the unit.