Heavy Duty Inflatable Bladders
Justram heavy duty inflatable bladders use nitrile reinforced with multiple layers of ballistic nylon. Compare models with and without bypass using the separate HD-series datasheets. Size, access dimensions and pressure limits depend on the selected model.
Justram heavy duty inflatable bladders are flexible, multi-size pipe plugs for suitable pipeline stopping and testing applications. Their reinforced construction uses a nitrile bladder and multiple layers of ballistic nylon. Select the material, model and connection arrangement for the actual service.
With or without bypass
A bypass provides a passage through the plug for the specified test or flow arrangement. Bypass models have their own dimensions, weights, connections and pressure limits. They are not interchangeable with the same nominal-size model without bypass.
The linked datasheets list maximum diameters of 2–72 inches for models without bypass and 4–72 inches for bypass models. These are maximum model diameters, not a claim that each plug seals every smaller bore. Confirm the allowable operating range and required contact length.
Example: two different 4-inch models
| Model | Bypass | Deflated diameter | Maximum inflation pressure | Listed maximum pipeline head |
|---|---|---|---|---|
| HD-004 | Without bypass | 2.5 inches | 80 psi | 92 ft |
| HD-004-BP | With bypass | 3.5 inches | 25 psi | 28 ft |
Values above are from the respective Justram datasheets. Inflation pressure acts inside the bladder; pipeline head describes the load held back in the pipe. Do not substitute one for the other or apply these example ratings to larger models.
Datasheets by configuration
Access, materials and installation review
Compare the deflated diameter and length with the access opening, bends and available handling space. Flexibility helps with restricted access, but does not guarantee passage through every opening. Plan handling around the listed weight and installation geometry.
For chemical exposure, specify the medium, concentration, temperature and duration. Alternative materials and protective layers can be requested for particular conditions; nitrile or ballistic nylon alone does not establish suitability for every chemical.
Obtain the model-specific inflation method, pressure limits and blocking or anchoring requirements. Follow the supplied instructions and confirm the weakest component’s rating in the test arrangement.
Request the right bladder
Send Justram the measured pipe bore, access dimensions, desired bypass, medium, operating pressure and temperature. Confirm current specifications and availability with the quotation. For lighter service, compare high expansion light-duty pipe plugs; for other materials, compare chemical resistant multi-size plugs.
