Uniplug or OR stoppersUniplug or OR stoppers

Uniplug or OR pipe stoppers

On the first hand, Operators greatly appreciate uni-plug stoppers when they are called upon to intervene in pipelines on nuclear sites. These low-pressure inflatable stoppers are effectively capable of preventing any foreign objects from falling into pipelines. These stopper systems are a safeguard against FME risks that could pose a threat in nuclear installations (Foreign Material Exclusion).

Uni-plug inflatable stoppers come in a wide range of stopper dimensions. This range of stoppers includes a wide selection of dimensions, from a minimum stopper diameter of 40 mm up to a maximum of 5000 mm.

And secondly, these low-pressure stoppers can also be used for:

  • pipeline repairs
  • insulation for argon welding
  • mine-shaft stoppers
  • or chimney stoppers



  • Completely air/watertight
  • Large range of stopper dimensions (from 50 mm to 5000 mm)


  • Optional thermal protection
  • Strong design


  • Easy to install and use
  • Can be reused

Detailed information

  • Material: Neoprene
  • Technique: cold gluing
  • Form: cylindrical
  • Inflation: by air
  • Max. inflation pressure: <2 bar depending on the diameter of the stopper
  • Optional:
    • Flexible transit hose

Technical informations

OR 4851572004021.5
OR 5356632004021.9
OR 6063712005022.4
OR 6871802005023.0
OR 7780902006023.8
OR 86901002006024.7
OR 961001112006025.8
OR 1051101222007027.0
OR 1181221372007028.8
OR 13313715420070211
OR 14615016920080213
OR 16416918925080221
OR 18318821125080226
OR 203210234300801.532
OR 228234262300901.540
OR 254261292350901.559
OR 2812883233501001.366
OR 3133213604001001.394
OR 3403483904001101.3110
OR 3803894364501101.1141
OR 4254354875001301186
OR 4754865435501400.9242
OR 5305425946001400.8299
OR 5805936647001600.7412
OR 6506657438001700.6555
OR 7267428318501700.5691
OR 7807973939501800.4833
OR 87089099610001800.31114
OR 9781000112011002000.31536
OR 10751095118012002500.31847
OR 11701190128013002500.32341
OR 12651285138014002500.252710
OR 13651390149015002500.253268
OR 14651490160016002500.23858

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

Pre-installation tips
Inspect the pipeline and remove any rough elements (stones, deposits …). Do not inflate the stopper when it is outside the pipeline. Never place a foreign object between the walls of the pipe and the stopper.
Storage advice
Deflate the stopper after each use - Store away from a source of light - Store at room temperature with a relative humidity between 40 to 70% - Ensure that the product is protected from potentially aggressive environments (corrosive products and vapours, solvents, salt water, rodents ...).
Maintenance tip
Carefully check all the external surfaces to ensure that there are no obvious deformations (folds, bulges, or cuts). - Clean the product (using slightly soapy water but not a detergent), rinse and dry completely.

Standards / regulations

1 year against all manufacturing defects


Fact Sheets / Business Guides
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Inflation hose
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