How often do wheeled unit cylinders or cartridges require hydrostatic testing?

How often do wheeled unit cylinders or cartridges require hydrostatic testing?

• A. Every year
• B. Once every 5 years
• C. Once every 10 years with a star stamp
• D. Both once every 5 years and once every 10 years with a star stamp

Answer: (D)

Wheeled unit cylinders or cartridges are required to undergo hydrostatic testing periodically to ensure their safety and reliability. The frequency of this hydrostatic testing can vary based on the specific types of cylinders and regulations governing their use, but typically, the requirement is to test them every five years for standard checks. In addition, cylinders that meet certain criteria may receive a star stamp, indicating that they have been tested and approved for an extended period, which is generally every ten years. This dual requirement serves to maintain the integrity of the cylinders, ensuring they can handle the pressure safely, while also extending their usable life when they meet the necessary safety standards. Therefore, the correct response acknowledges both the five-year testing interval and the ten-year extension with the star stamp, making the answer comprehensive and reflective of industry practices.

Wheeled unit cylinders or cartridges are required to undergo hydrostatic testing periodically to ensure their safety and reliability. The frequency of this hydrostatic testing can vary based on the specific types of cylinders and regulations governing their use, but typically, the requirement is to test them every five years for standard checks. In addition, cylinders that meet certain criteria may receive a star stamp, indicating that they have been tested and approved for an extended period, which is generally every ten years.

This dual requirement serves to maintain the integrity of the cylinders, ensuring they can handle the pressure safely, while also extending their usable life when they meet the necessary safety standards. Therefore, the correct response acknowledges both the five-year testing interval and the ten-year extension with the star stamp, making the answer comprehensive and reflective of industry practices.