PART 53—HEATING BOILERS
- SUBPART 53.01—General Requirements (§53.01-1 to §53.01-10)
- SUBPART 53.05—Pressure Relieving Devices (Article 4) (§53.05-1 to §53.05-5)
- SUBPART 53.10—Tests, Inspection, Stamping, and Reporting (Article 5) (§53.10-1 to §53.10-15)
- SUBPART 53.12—Instruments, Fittings, and Controls (Article 6) (§53.12-1 to §53.12-1)