DWT Pipe Purge System – Full Kit (25mm – 165mm ID)
- DWT Brand
- Purge Bung Kit
- 25 – 165mm ID Pipe
A range of pipe purging equipment ranging from purge bungs to purge monitors. The purge apparatus listed here can be used for multiple applications including stainless steel exhaust systems, sanitary welding as well as other pipe welding applications.
Why Back Purge
When welding, a shielding gas is used to protect the molten weld pool from the atmosphere. If welding a joint though, the shielding gas from the torch is not shielding the back of the weld. The rear of the weld can then allow entry of the air, creating contamination. This contamination can then lead to decreased weld strength and decreased anti corrosive properties within the solidified weld. Purging equipment can be used to create a dam either side of the weld joint, with bungs or tapes. The space between the dams can then be filled with a shielding gas to displace atmospheric gases. A purge monitor can accurately measure the oxygen levels inside the purged area to ensure complete shielding of the welded area.
By creating an oxygen-free environment on the backside of the weld, back purging prevents oxidation, maintains the inherent properties of the parent material, and ensures the longevity and reliability of welded components. Furthermore, effective back purging ensures that the welded joint retains its corrosion-resistant properties, making it suitable for applications where maintaining hygiene and preventing contamination is critical. Real world examples of where back purging is critical is in Stainless Steel car exhaust systems as well as sanitary pipework used to carry food or drink.