Which organization lists the approved standards for gas-fired storage type water heaters?

Which organization lists the approved standards for gas-fired storage type water heaters?

• A. ASTM
• B. ASME
• C. UL
• D. CSA

Answer: (B)

Gas-fired storage water heaters are treated as pressure vessels because they hold heated water under pressure. The standards that govern their design, fabrication, and inspection come from the American Society of Mechanical Engineers through the Boiler and Pressure Vessel Code. When a heater bears the ASME stamp, it shows the unit was built to those specific requirements, including appropriate materials, welds, and pressure/temperature ratings. That’s why ASME is the organization that lists the approved standards for these appliances. Other groups—ASTM for materials, UL for safety certification, CSA for Canadian standards—play important roles in related areas, but the official standards for the vessel itself are ASME.

Gas-fired storage water heaters are treated as pressure vessels because they hold heated water under pressure. The standards that govern their design, fabrication, and inspection come from the American Society of Mechanical Engineers through the Boiler and Pressure Vessel Code. When a heater bears the ASME stamp, it shows the unit was built to those specific requirements, including appropriate materials, welds, and pressure/temperature ratings. That’s why ASME is the organization that lists the approved standards for these appliances. Other groups—ASTM for materials, UL for safety certification, CSA for Canadian standards—play important roles in related areas, but the official standards for the vessel itself are ASME.