The 8-PPM PURGING 10" Inflatable Pipe Double Purge Bag System, model PB10, is an advanced solution for achieving oxidation-free penetration weld beads in pipe welding applications. This innovative system is engineered around the principle of using two inflatable dams, connected by an armoured spinal tube, to create a secure seal on either side of the weld joint. These dams are strategically positioned to be far enough from the weld to avoid heat effects, yet close enough to ensure the fastest possible weld purge time. Designed for ease of use, the system is inserted into the pipe's bore with the aid of a luminous strip, which helps to accurately center the system to the weld gap. Once the gas flow begins, the dams inflate, and upon reaching a pre-set pressure, a specialized valve gently releases inert gas into the weld chamber. This controlled release purges the interspace without turbulence, effectively removing oxygen through integral exhaust tubes within the bags. This process enables welders to consistently produce high-quality, oxidation-free welds. For optimal results, the Purge Bag system can be used in conjunction with PPM’s oxygen monitors, which indicate when the required low level of oxygen has been achieved, signaling that welding can safely commence. After welding, the dams are easily deflated by simply disconnecting the purge gas feed, allowing for quick and effortless withdrawal of the system. A key design advantage is its single gas connection, which manages both dam inflation and weld purging, simplifying setup and operation. The PB10 model is specifically designed for a nominal pipe size of 10 inches (250 mm), accommodating an internal diameter range of 9.26 - 10.61 inches (235 - 270 mm). It weighs approximately 2 lbs (1.00 kg). The system comes equipped with universal fittings to suit various regional standards: an International 21 KA series male connector and an Americas ¼" (0.25") NPT male connector. 8-PPM PURGING also offers larger sizes and custom solutions upon request, providing a 35 mm / 1.37" expansion range to meet diverse project requirements. For pipe sizes over 12 inches, the use of the Rapid Purge™ system is strongly recommended. Specifications: • System Type: Purge Bag system • Dam Configuration: 2 dams connected by armoured spinal tube • Gas Connection: Single connection for both dam inflation and weld purging • Nominal Pipe Size: 10" (250 mm) • Internal Diameter Range: 9.26 - 10.61" (235 - 270 mm) • Weight: 2 lbs (1.00 kg) • International Connector: 21 KA series male connector • Americas Connector: ¼" (0.25") NPT male connector • Custom Solution Expansion Range: 35 mm / 1.37"
