Back Purging is the process of protecting and shielding the back side or under side of the weld during welding to prevent oxidation.
Back Purging with fiberglass Weld Backing Tape® supports weld roots and can prevent oxidation, sugaring, achieving clean, oxide free welds.
Luke Keane®, Technical Sales Manager for Huntingdon Fusion Techniques HFT® said: “We manufacture a range of Weld Backing Tape® available up to 600 amps. This innovative method of back purging will ensure a high quality finish suitable for plate, sheet and pipe welding."
Unlike ceramic fibre, Weld Backing Tape® has no true melting point so it works satisfactorily with TIG or MIG welding (GTAW or GMAW) where temperatures can reach up to 6,000ºC. This overcomes the concerns associated with ceramic fibre versions that have a melting point of 1,800ºC.
Weld Backing Tape® is a material used for manual and automatic welding. It can help achieve higher welding speeds and dramatically reduce the amount of post weld cleaning required.
Each tape consists of a 3" (75mm) wide aluminium adhesive tape, in the centre of which is a 1" (25mm) wide band of woven glass fibre. The glass fibre matting has differing thicknesses to match the welding current in use.
Made in Wales – Manufacturer of the Year 2019!
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