Diaphragm on offshore platformDiaphragm on offshore platform

Rip-out diaphragms

The rubber Rip-out diaphragms, equipped with a cruciform piercing tool, provide different functions:

  • buoyancy assistance for large platforms equipped with metal floatation tanks,
  • corrosion protection for electrical outlet cables.

Our teams can travel on-site to install your offshore buoyancy kits no matter where you are located! A complete removable of all rubber parts version is also available.



  • Tightness testing can be implemented before installation
  • Penetration and rip-diameter testing can also be performed
  • Simulation and calculation of the force required to puncture the diaphragm


  • Air and water tight
  • Suitable for applications at depth
  • Ease of installation


  • Locking fixation system
  • Insert integrated into the rubber
  • Selection of suitable materials

Detailed information

  • Material: Synthetic Rubber
  • Technique: hot vulcanization in a vacuum autoclave
  • Dimensions: min. 6″ (152.4 mm) / 118″ (max. 2997.2 mm)
  • Form: cylindrical
  • Temperature resistance: +0 / +60°C
  • Max. thickness: defined by the clients’ specifications
  • Grade of steel: defined by the clients’ specifications

You can not find your dimensions

Our design department employs the best project leaders and designers and will be pleased to develop and create a tailor-made product specially for your unique project.


Composition / Advice

Storage advice
Store in its original case away from light, damp, and temperature variations.

Standards / regulations

Please contact us
In accordance with the conditions of the Pronal guarantee


Fact Sheets / Business Guides
  • This field is for validation purposes and should be left unchanged.


Metal flange, screws, and gussets