Which license would you need to install non-boiler external piping, defined by ASME B31.1?

To install non-boiler external piping as defined by ASME B31.1, the appropriate license is Class 3B. This classification specifically pertains to contractors who are authorized to work with non-boiler external piping systems, which include steam, hot water, and other fluid piping systems operating under specific conditions.

ASME B31.1 outlines the design, materials, fabrication, installation, inspection, testing, and safety considerations for these types of piping systems. Having a Class 3B license indicates that the individual or contractor has met the necessary qualifications and standards to ensure safe and efficient installation of these systems.

The other classes are designated for different scopes of work and do not include the specific competencies required for non-boiler external piping installation as outlined in the ASME B31.1 code. Understanding these classifications is crucial as it ensures that the work carried out adheres to the regulatory and safety standards within the industry.