Does anyone know why NFS 372 applies to brass & bronze but not to copper & copper alloys

[buckeye angie]

Per the NFS 372 standard, it appears that copper and copper alloys are not subject to lead testing whereas, brass and/or bronze is. Does anyone know why brass and/or bronze has a greater risk of lead contamination (vs. just copper & copper alloys?)

 

[gtaw]

Brass and bronze are both copper alloys. Perhaps the concern is the brass (copper and zinc) and bronze (copper and tin) are more likely to be contaminated with tramp lead from scrap metal mixed into the melt.

Best regards - Al

 

[EdStainless]

The specs for pure Cu grades contain limitations on 'tramp' or unspecified elements.

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P.E. Metallurgy, Plymouth Tube

 

[metengr]

You want a definitive answer? Write NSF and they will respond. They solicit comments and questions about their standards.