Class 5 Boiler Practice Exam 2025 - Free Boiler Certification Practice Questions and Study Guide

A steam boiler operating at 10 psig falls under the requirements of ASME Section IV. This section specifically addresses the rules for the construction of low-pressure boilers, which are defined as boilers operating at pressures not exceeding 15 psig. The guidelines established in Section IV ensure that boilers designed for this lower range of pressure are built safely, taking into account considerations such as materials, design, construction, and inspection processes appropriate for lower pressure applications.

In contrast, Section I pertains to power boilers operating at high pressures, typically above 15 psig, and Section VIII addresses pressure vessels intended for various applications generally at higher pressures. Section X is related to fiber-reinforced plastic pressure vessels, which do not apply to standard steam boilers. Thus, the specific construction requirements for a steam boiler at 10 psig align with the stipulations provided in ASME Section IV, emphasizing safety and reliability for low-pressure systems.