Verify brazing requirements for medical gas copper piping (nitrogen purge and brazer qualification)

Steps

1. Confirm brazing procedures and brazer performance for medical gas/vacuum piping must be qualified under ASME BPVC Section IX (Welding and Brazing Qualifications) or AWS B2.2 (Standard for Brazing Procedure and Performance Qualification), both as modified by NFPA 99
2. Confirm the brazing procedure specification must address cleaning, joint clearance/overlap, internal purge gas type and flow rate, and filler metal, and that an inert purge gas (nitrogen) is flowed through the piping during brazing to prevent internal oxide/scale formation
3. Confirm brazer qualification requires a test coupon, evaluated by visual examination and then sectioning, to confirm absence of internal oxidation and proper joint characteristics
4. Confirm brazer performance qualification remains valid indefinitely unless the brazer goes longer than roughly 6 months without brazing under the qualified procedure, or there is specific reason to question ability — verify the exact continuity interval against the current NFPA 99 edition text rather than a secondary source
5. Confirm that brazing on medical gas systems additionally requires the individual to hold ASSE Standard #6010 (Medical Gas Systems Installers) certification, which includes its own practical brazing exam