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Should one use solder or silver solder for joining copper tubing in fuel gas system?

April 26, 2017Copper FUEL Gas joining Silver solder system tubing

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Should one use solder or silver solder for joining copper tubing in fuel gas system?

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Any fuel gas lines installed using copper tube must be brazed using a filler metal containing less than 0.05% P (phosphorus) and a melting temperature greater than 1000 degrees F. The only filler metal (trade and industry standard) that contains less than the 0.05% P would be an AWS BAg type alloy (according to the American Welding Society’s AWS A5.8 specification). In no case should solder or “soft-solder” be used to join copper tube and fittings in fuel gas systems.