For medical-surgical vacuum systems, piping shall be hard-drawn, seamless copper tube type _________.

• A. ASTM B88
• B. ASTM B819
• C. any of the above
• D. ASTM B 280

Answer: (C)

Hard-drawn, seamless copper tubing is required for medical-surgical vacuum piping because it provides the strength and leak resistance needed under vacuum. Several ASTM specifications cover seamless copper tubes that can be produced in a hard-drawn temper, with the exact standard chosen based on tube size and intended service. The standards include ASTM B88, ASTM B819, and ASTM B280. Since all describe seamless copper tubes suitable for systems like medical gas and vacuum, any of them can apply depending on the diameter range and application in the project. The specific standard to use is determined by the project design documents or the authority having jurisdiction, which ensures the tube chosen fits the required size and compatibility with fittings and system pressure.