Argweld® Heat Resistant Pipe Purging Systems
A wide range of high strength steels containing chromium, vanadium and molybdenum as alloying elements (generally referred to as CMV steels) is prone to cracking during welding.The crack tendency can be reduced by a combination of pre-heat and post-weld heating since this prevents steep temperature excursions and the formation of brittle and undesirable intermetallic phases.The HFT Heat Resistant Pipe Purging Systems have been developed so that pre-heating and welding can be carried out with the purge system in place.They will withstand temperatures in the region of 300oC for periods up to 24 hours.DescriptionBecause of the limited flexibility of the heat resisting materials used in construction, the expansion range of each system is +12mm -0mm; each system is manufactured to meet a customer-specified internal pipe diameter.All purging systems are re-usable.