One of the best types of pipe to use with R-717 (ammonia) refrigerant is ___________.

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Multiple Choice

One of the best types of pipe to use with R-717 (ammonia) refrigerant is ___________.

Explanation:
Material compatibility with ammonia is the main idea. Ammonia (R-717) is a harsh refrigerant for some metals and plastics, so piping must handle high pressures and resist ammonia-induced corrosion. Copper and aluminum tend to corrode or form issues in ammonia service, and PVC isn’t rated for the pressures and potential chemical interactions of ammonia piping. Carbon steel, on the other hand, is strong enough for the system pressures and has a well-established history of reliable use with ammonia systems and the mineral-oil lubricants often used there. It’s also economical and straightforward to weld and repair in industrial applications. So carbon steel is the preferred piping material for R-717 systems.

Material compatibility with ammonia is the main idea. Ammonia (R-717) is a harsh refrigerant for some metals and plastics, so piping must handle high pressures and resist ammonia-induced corrosion. Copper and aluminum tend to corrode or form issues in ammonia service, and PVC isn’t rated for the pressures and potential chemical interactions of ammonia piping. Carbon steel, on the other hand, is strong enough for the system pressures and has a well-established history of reliable use with ammonia systems and the mineral-oil lubricants often used there. It’s also economical and straightforward to weld and repair in industrial applications. So carbon steel is the preferred piping material for R-717 systems.

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