One company providing large plugging systems is the Pipestoppers division of Huntingdon Fusion Techniques (HFT). As well as the company's Mechanical and Freeze Range of plugging systems, HFT provides a wide range of inflatable plugs and bladders, which are no longer regarded as expensive as they were traditionally in the past. In addition to the standard range of inflatable plugs, HFT can deliver purpose designed models. Examples include plugs working in high-pressure applications for pipelines in the oil and gas industry plus those that are needed for very high temperatures and others needed for caustic environments. HFT manufactures Inflatable Pipe Plugs in sizes 35mm (1.5”) to 2,000mm (78”) in diameter.
Huntingdon Fusion Techniques HFT