Part 53 — Heating Boilers

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• Subpt. 53.01 General Requirements §§53.01-1 to 53.01-10
• Subpt. 53.05 Pressure Relieving Devices (Article 4) §§53.05-1 to 53.05-5
• Subpt. 53.10 Tests, Inspection, Stamping, and Reporting (Article 5) §§53.10-1 to 53.10-15
• Subpt. 53.12 Instruments, Fittings, and Controls (Article 6) §53.12-1