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Annular Seals





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Petersen can manufacture Annular Seals for almost any size, pressure, chemical, and temperature requirements. Annular seals can be made with a continuous seal to slip over the end of a pipe or open-ended to form around a pipe already in place. The Petersen® Multi-Flex™ Annular Seals are very flexible, easy to install, and have many inflation connection options. These seals are ideal for bypassing a pipeline during repairs or any other temporary small to large pipeline connection.

  Seal ID Seal OD Seal Length Max. Inflation
Product Code mm mm mm psi bar
108 111-0408-6 115 305 194 25 1.7
108 111-0612-6 169 305 153 25 1.7
108 111-0816-6 225 388 153 25 1.7
108 111-1018-8 274 439 204 25 1.7
108 111-1218-8 324 439 204 25 1.7
108 111-1624-8 407 591 204 25 1.7
108 111-1830-12 458 591 305 25 1.7
108 111-2026-12 508 642 305 25 1.7
108 111-2436-16 610 896 407 25 1.7
108 111-3042-16 762 1048 407 25 1.7
108 111-3648-18 915 1201 458 25 1.7
108 111-4248-18 1067 1201 458 25 1.7




**Inflatable Plug Warning: Maximum head pressures that a pipe plug may restrain can only be estimated. Slippage is influenced by many factors including fluid in the pipe, coefficient of pipeline friction, pressure required to inflate the plug, and accuracy of pressure gauges. Generally, a Multi-Flex™ Inflatable Plug inserted fully into pipeline will begin slipping between 50% and 80% of the inflation pressure if it has an inflated pipe contact length of 1 ˝ to 2 times the diameter, but even a head pressure of 50% of the inflation pressure may cause slippage with some liquids. The inflation pressure is also subject to temperature change and debris or protrusions in the pipeline that could rupture the plug. The inflation pressure should be monitored and plugs anchored and/or mechanically blocked when slippage could cause property damage or injury. NEVER use a test pressure greater than the capacity of the weakest pipe or component in the system. NEVER use an inflatable plug when its failure could cause injury or catastrophic damage. NEVER use an inflatable plug as the only means of protection for personnel working down stream.
 
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