Pipe penetration through "A" class bulkheads and decks
Pipe penetration through "A" class bulkheads and decks by Jingjiang Haihong Plastics & Rubbers Science-Technology Co., Ltd. DNV MED certificate MEDB000023E.
Inspector Detail
▸
Common issues
- Incorrect or insufficient annular gap fill/intumescent material at installation
- Seal displaced or damaged during later pipe or cable work by other trades
- Incompatible pipe material or diameter not matching the tested/approved configuration
- Sealant or sleeve material ageing and shrinking over time
- Missing certification label or marking at the penetration
- Additional unauthorised penetrations made nearby, weakening the boundary
Inspection checklist
- Visual condition of the seal material at each penetration
- No visible gap or daylight around the pipe
- Sealant/sleeve firmly bonded to both the pipe and the bulkhead/deck opening
- Pipe type and size matches the tested/approved configuration
- Penetration documented on the structural fire protection/fire zone drawing
- No unauthorised additional penetrations nearby
- Certification marking present and legible
Service intervals
| Visual condition check | at each periodic structural fire protection inspection, typically annually |
| Full boundary/documentation audit | at renewal survey |
| Re-check after any nearby pipework or cable modification | immediately following the work |
| Certification marking legibility check | at each periodic fire safety inspection |
Typical wear limits
| Gap between pipe and seal material | should show no visible gap - any gap indicates the seal has failed and needs reinstatement per the approved installation method |
| Sealant condition | cracking, shrinkage, or separation from the pipe or structure should be assessed against the type approval installation instructions before the boundary is accepted |
| Overlap/embedment depth of the seal system | should match the depth specified in the approved installation drawing - confirm against certificate MEDB000023E |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Critical spares
- Matching type-approved penetration seal kit, by certificate reference
- Intumescent sealing material of the approved type
- Mounting/sleeve hardware matching the approved installation
- Certification/identification label for reinstatement
- Backing/packing material matching the approved system
Safety
- An improperly sealed or damaged penetration compromises the "A" class fire and smoke boundary between compartments
- Any modification must be re-certified/approved, not field-improvised
- Loss of boundary integrity here directly undermines the fire zone subdivision relied on for escape and firefighting
Class survey
Note: this catalog entry is filed under 'Fire Hoses & Nozzles' but the product is a fire-rated pipe penetration seal for 'A' class bulkheads/decks (MED certificate MEDB000023E), not a hose - the content above addresses the actual product. Class surveyors check structural fire protection at each penetration against the approved drawings and the MED certificate during SOLAS II-2 related surveys.
Components & Design
Component data being added…
Technical Data
🤖 Ask about this model
One free question — answered like a marine engineer. No account needed.
Suppliers & Spare Parts
Direct links to manufacturer, datasheet, spare-parts portal and dealers — request access below.
📄 Request sourcing links & documentsCases, daily reports, timesheets and AI troubleshooting in the OceanSphere Marine app — free for 14 days.
Start free trial →Find manufacturers, repair shops and spare-part dealers in the Maritime Network — our global company directory.
Maritime Network →