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    Pronal inflatable stoppers for compliance with pipeline safety

    Air Springs Supply

    Pronal inflatable stoppers distributed in Australia by Air Springs Supply will help companies ensure compliance with pipeline safety during the upcoming maintenance season. 

    Chemicals, waste and other potentially harmful materials accidentally spilled in workplaces can enter the environment through drains and watercourses, seep into the ground and contaminate the soil or groundwater. Such spills are a major source of concern to both State Environmental Protection organisations as well as national bodies such as Safe Work Australia, which has introduced its Code of Practice for Managing Risks of Hazardous Chemicals in the workplace.

    The Code requires companies to develop good handling procedures for workplaces to minimise the chance of such spills, and also have a spill management protocol in place to make sure spills are safely cleaned up. It stipulates that those conducting businesses or undertakings must manage risks associated with the use, handling, generating or storing of hazardous chemicals in a workplace, including identifying foreseeable hazards and eliminating the risk so far as practicable.

    One method of stopping and sealing pipelines that is attracting increasing interest and application in Australasia for maintenance and environmental protection applications involves inflatable pipe stoppers that can be rapidly deployed, easily transported and widely applied in remote, temporary and permanent industrial situations.

    According to James Maslin, National Sales Manager for Air Springs Supply, pipelines are a major component of such a risk management strategy. The issues involved in pipeline maintenance and safety are particularly acute during the maintenance season, when companies may be handling increased quantities and types of hazardous materials associated with cleaning, vehicle maintenance and plant upkeep.

    Maintenance, testing and emergency situations require stoppers that can be rapidly and securely deployed to provide primary or secondary safety and environmental security as mandated by Safe Work Australia and State Environmental Protection Agencies.

    Mr Maslin explains that these stoppers are sometimes permanently located in pipelines for instant remote inflation with compressed air or other gas where there is a risk of toxic runoff at different stages of production, or where spillages occur. In other instances they are used to seal off sections of pipe where leaks are occurring, serving the dual role of enabling pressurisation of that section so leaks can be detected, then protecting the men in the pipeline from any product flows while they work to fix the problem.

    Manufactured by elastomer products specialists Pronal, the company that produced the inflatable bags used to lift sections of the liner Titanic from nearly four kilometres underwater in the Atlantic Ocean, the enormously strong inflatable stoppers are suitable for all types of pipelines including concrete, cast iron, steel, stainless steel and PVC. External surfaces are also customised to particular needs, such as exposure to gas or petroleum products or where long term installation is required. While direct or prolonged exposure to petroleum-based products is not recommended, the stoppers have strong emergency use applications in such industries where speed of deployment is vital.

    Pronal inflatable pipe stoppers are used for maintenance, testing and emergency tasks in applications as diverse as oil and gas delivery, industrial and municipal water and waste water, and pollution prevention in mining, energy and industrial projects where sealing and testing operations need to be conducted not only with complete safety and environmental security, but also with considerable speed to maintain flows of liquids and gases.

    One of the latest stoppers employed in Australasia is a custom-fabricated OFR type to fit a pipe with an inside diameter of 900mm. Multi-sized stoppers are also available in an expanded range spanning pipes of 45-2115mm diameter in stock sizes and up to 3000mm for customised types.

    Different ranges respond to the needs of particular industries and pressure requirements, with VPE and ORJ types being used for pressures up to one bar and OPV types for pressures up to 3 bar. Higher pressure stoppers are also available.

    Ongoing protection against contamination of waterways from spills into water and sewerage lines is provided by Pronal’s OPAP and OFR Pollu-Plug stoppers, which are permanently and unobtrusively fitted in water and sewerage lines ready for instantaneous inflation by remote triggering as soon as an emergency arises in industrial, civil and municipal applications.

    When pipelines are not subject to an emergency, the uninflated stopper allows normal non-polluted contents to pass beneath the elastomer-coated Pollu-Plug. It is connected by an air supply line to an all-weather control panel and nitrogen inflation cylinder supplied by the customer and located outside the pipe. 

    In addition to creating an airtight seal within the pipe to effectively stop the water flow, these stoppers are also highly versatile in applications such as testing air, gas and water pressure, locating leaks, and even allowing the injection of chemicals or dies into a pipeline when facilitating cleaning or locating leaks in designated sections between two stoppers. 

    Mr Maslin adds that Pronal products are based on more than 40 years of producing specialist pneumatic elastomer designs for demanding applications, including government, military, heavy industrial, emergency service, sub-sea and exploration. 

    Key advantages of the Pronal technology also include simplicity, portability and re-use, as maintenance staff don’t need huge amounts of gear on-site and the stoppers themselves are easy to transport around plants to remote locations, where they can be used, moved on, and used again. They are an ideal method for achieving compliance with statutory requirements in a cost-effective and efficient manner. 

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