Super Heavy Duty Inflatable Pipe Plugs

Super heavy duty inflatable pipe plugs use a reinforced rubber bladder bonded to an internal metal mandrel. The roll-up construction lets the bladder expand into contact with the pipe wall. A central bypass provides access for the test medium, with an additional port listed on larger models.

Choose the exact SHD model for the pipe bore

The table covers nominal pipe sizes from 3 to 96 inches. Each model has a defined minimum and maximum pipe diameter; one plug does not cover that entire range. Measure the actual inside diameter and check the corresponding row before selection.

For example, SHD-06 is listed for a 5.5 to 6.25-inch bore, while SHD-24 is listed for a 23 to 24.25-inch bore. Also compare plug diameter, length, weight and available insertion space.

Water inflation and hydrostatic test pressure

The listed inflation requirement is 225 psi with water. The maximum back/test pressure shown is 150 psi. These are separate limits: inflation pressure acts inside the bladder, while back/test pressure acts against the installed plug.

Confirm the supplied model, restraint, installation procedure and test arrangement with Justram before use. The listed pressure figures do not replace the model instructions or assessment of the pipe and installation.

Model specifications and bypass connections

The bypass column identifies the listed connection sizes. Models with two ports allow separate connections for the test setup; confirm the required filling, monitoring and venting arrangement.

Application and handling information

Potential applications include suitable water-main, force-main and industrial pipeline hydrotests. Provide the pipe bore, material, condition, test medium, required pressure and access details when requesting a selection.

Model weights vary substantially. Plan handling, insertion and retrieval for the selected plug and site conditions. Confirm the bypass fittings and suitable water-inflation equipment required for the complete setup.

For other constructions, review heavy duty inflatable bladders and chemical resistant multi-size plugs. Their model ranges and pressure limits must be assessed separately.