What type of tank does not require recertification?

The correct choice, which is the ASME tank, is significant because these tanks are typically designed and constructed according to the standards set by the American Society of Mechanical Engineers. ASME tanks are generally used for stationary applications and are known for their durability and long lifespan. Once they are manufactured and inspected, they are not subject to periodic recertification in the same way that certain other tank types are. This is because the ASME certification is seen as a mark of quality and safety that, once established, indicates that the tank is built to withstand the pressure and conditions it is subjected to for its intended lifespan.

Other types of tanks, such as DOT tanks, require recertification at regular intervals to ensure their safety and integrity for transporting gases. This recertification process is essential because these tanks are subject to wear and tear over time and must be regularly inspected to continue carrying pressurized materials safely. Understanding the differences in tank certification helps in ensuring compliance with safety standards and regulations in the RV industry.