Root Gap

Root Gap

An area of separation between the metals to be joined at its junction point. Expensive inert gases can escape from the purge chamber and inversely oxygen can enter it via the root gap. Therefore, it is important that the root gap be contained with tape when purging. Ideally, the tape will have an adhesive free zone, like that of EZ Zone Tape. This is used to seal the root gap, while preventing contamination.

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