Roxtec PPS0000043021 RS PPS 43 AISI 316 Pipe Penetration Seal

Roxtec PPS0000043021: RS PPS 43 AISI 316 Pipe Penetration Seal Kit with Core

The Roxtec PPS0000043021 (RS PPS 43 AISI 316) is a certified marine- and offshore-grade penetration seal kit engineered specifically for running single thermoplastic and composite pipes through fire-rated A-Class decks and bulkheads. Configured as a symmetrical back-to-back assembly, the system combines two round RS 43 elastomeric compression seals equipped with removable Multidiameter™ peel-away rubber layers and an internal intumescent wrap.

In normal sea-going conditions, the dual RS 43 elastomeric units deliver certified gas-tight (2.0 bar) and watertight (4.0 bar) protection against hydrodynamic loading, bilge fluids, salt-spray exposure, and compartment pressurization. In the event of a fire, the intumescent compound rapidly expands to crush and completely plug the void left by the melting thermoplastic pipe, forming a solid carbonaceous char that halts flame propagation, thermal conductivity, and toxic smoke transfer across watertight compartments.

Model Details

• Manufacturer: Roxtec
• Product Line: RS PPS Series (Plastic Pipe Seal)
• Model Designation: RS PPS 43 AISI 316 w/ Core
• Manufacturer Part Number (MPN): PPS0000043021
• Configuration: Dual-seal back-to-back assembly with center intumescent wrap and removable center core
• Hardware Material: Acid-proof Stainless Steel (AISI 316 / EN 1.4404)
• Elastomer Type: Low smoke index halogen-free EPDM rubber

Technical Specifications

Key Features

1. Intumescent Fire-Block Action: Automatically activates under elevated temperatures to crush thermoplastic piping and hermetically block smoke, gas, and fire spread across A-Class divisions.
2. Multidiameter™ Adaptability: Removable rubber concentric layers allow on-site adjustment to fit pipe outer diameters ranging from 4.0 mm to 23.0 mm, eliminating the need for precision-machined bespoke grommets.
3. Acid-Proof AISI 316 Hardware: Marine-grade stainless steel front/back compression plates, bolts, and nuts resist chloride pitting and galvanic corrosion in aggressive saline and offshore atmospheres.
4. Integrated Spare Capacity Core: Supplied with a removable elastomeric center core, allowing installation as a pre-sealed blind transit for future pipe routing without compromising partition integrity.
5. Substantial Hydrostatic Barrier: Delivers verified catastrophic water protection up to 4.0 bar and gas tightness up to 2.0 bar to maintain compartment integrity under damage-control conditions.

Applications

• Commercial Shipbuilding: Fresh water lines, sanitary gray/black water drainage, and chilled water loops penetrating A-60 deck/bulkhead boundaries.
• Offshore Oil & Gas Platforms: Living quarter utilities, instrumentation sampling lines, and chemical injection tubing run through pressurized bulkheads.
• Naval Surface Vessels: Non-metallic chilled water circulation and fiber-composite pneumatic control tubing transiting watertight compartments.
• Chemical Processing Facilities: Acid/alkaline effluent and reagent lines penetrating containment bunds and explosion-rated partition walls.

Frequently Asked Questions

Can the Roxtec PPS0000043021 be installed as a blank spare for future routing?

Yes. Because it is delivered with its central core intact, you can install and torque the seal to maintain watertight, gas-tight, and fire-rated compartment separation before the service pipe is run. Once ready, loosen the fitting, discard the center core, peel the required layers, and pass the pipe through.

Why is an intumescent strip necessary for plastic pipes if the EPDM rubber seals tight?

EPDM provides static sealing against fluids and gases. However, in a fire, thermoplastic pipes melt away quickly, leaving an open hole through the bulkhead. The intumescent strip reacts to high heat by expanding rapidly to crush the softening pipe and fill the void with an insulating char barrier.

Can this seal be used for metal pipes?

No. The PPS configuration is specifically engineered and certified for combustible thermoplastic and composite piping. For metallic piping systems (copper, CuNi, steel), use the standard Roxtec RS 43 AISI 316 without the PPS intumescent insert.

How do I confirm the seal is torqued correctly without a torque wrench?

Inspect the perimeter of the elastomeric module. Tighten the crosswise hex bolts evenly until the rubber bulges approximately 1 mm to 2 mm beyond the outer edge of the AISI 316 compression plates and the assembly is firmly anchored against the sleeve wall.