1. (a) Fired pressure vessels (boilers) shall be equipped with water level gauges, pressure gauges, automatic pressure-relief valves, blowdown piping, and other safety devices approved by the American Society of Mechanical Engineers to protect against hazards from overpressure, flameouts, fuel interruptions and low water level, all as required by the appropriate sections, chapters and appendices listed in paragraphs (b) (1) and (2) of this section.

2. (b) These gauges, devices and piping shall be designed, installed, operated, maintained, repaired, altered, inspected, and tested by inspectors holding a valid National Board Commission and in accordance with the following listed sections, chapters and appendices:

   1. (1) The ASME Boiler and Pressure Vessel Code, 1977, published by the American Society of Mechanical Engineers.

      Section and Title I Power Boilers II Material Specifications—Part A—Ferrous II Material Specifications—Part B—Non-ferrous II Material Specifications—Part C—Welding Rods, Electrodes, and Filler Metals IV Heating Boilers V Nondestructive Examination VI Recommended Rules for Care and Operation of Heating Boilers VII Recommended Rules for Care of Power Boilers

   2. (2) The National Board Inspection Code, a Manual for Boiler and Pressure Vessel Inspectors, 1979, published by the National Board of Boiler and Pressure Vessel Inspectors.

      Chapter and Title I Glossary of Terms II Inspection of Boilers and Pressure Vessels III Repairs and Alterations to Boiler and Pressure Vessels by Welding IV Shop Inspection of Boilers and Pressure Vessels V Inservice Inspection of Pressure Vessels by Authorized Owner-User Inspection Agencies Appendix and Title A Safety and Safety Relief Valves B Non-ASME Code Boilers and Pressure Vessels C Storage of Mild Steel Covered Arc Welding Electrodes D-R National Board “R” (Repair) Symbol Stamp D-VR National Board “VR” (Repair of Safety and Safety Relief Valve) Symbol Stamp D-VR1 Certificate of Authorization for Repair Symbol Stamp for Safety and Safety Relief Valves D-VR2 Outline of Basic Elements of Written Quality Control System for Repairers of ASME Safety and Safety Relief Valves D-VR3 Nameplate Stamping for “VR” E Owner-User Inspection Agencies F Inspection Forms

3. (c) Records of inspections and repairs shall be kept in accordance with the requirements of the ASME Boiler and Pressure Vessel Code and the National Board Inspection Code. The records shall be made available to the Secretary or his authorized representative.
4. (d) Sections of the ASME Boiler and Pressure Vessel Code, 1977, listed in paragraph (b)(1) of this section, and chapters and appendices of the National Board Inspection Code, 1979, listed in paragraph (b)(2) of this section, are incorporated by reference and made a part of this standard. These publications may be obtained from the publishers, the American Society of Mechanical Engineers, 22 Law Drive, P.O. Box 2900, Fairfield, New Jersey 07007, Phone: 800-843-2763 (toll free); http://www.asme.org, and the National Board of Boiler and Pressure Vessel Inspectors, 1055 Crupper Avenue, Columbus, Ohio 43229. The publication may be examined at any Metal and Nonmetal Mine Safety and Health District Office of the Mine Safety and Health Administration.

[50 FR 4082, Jan. 29, 1985, as amended at 71 FR 16667, Apr. 3, 2006]