Code of Maryland Regulations
Title 09 - MARYLAND DEPARTMENT OF LABOR
Subtitle 12 - DIVISION OF LABOR AND INDUSTRY
Chapter 09.12.01 - Board of Boiler Rules
09.12.01.34 - Historic Boilers

Universal Citation: MD Code Reg 09.12.01.34

09.12.01.34. Historic Boilers

A. Except as provided for in this regulation, a historical boiler shall be installed, inspected, operated, repaired, or altered in accordance with the NBIC.

B. Inspection.

(1) An initial inspection shall be conducted:

(a) To determine baseline criteria needed for the operating life of the boiler;

(b) In accordance with the requirements outlined in the NBIC;

(c) On any boiler not previously inspected in Maryland; and

(d) On any boiler which has not received a certificate inspection in Maryland in the previous 2 years.

(2) Except as provided in this subsection, a historical boiler shall be inspected at the inspection intervals of the NBIC:

(a) An internal inspection shall be conducted annually;

(b) An external inspection shall be conducted annually;

(c) After a repair or alteration, a historical boiler shall be inspected before operation; and

(d) If an inspection detects a condition warranting further investigation, an inspector may require further investigation.

(3) Before an inspection, an owner shall, upon request, provide the inspector with:

(a) Stress calculations in accordance with this regulation;

(b) The calculated factor of safety;

(c) Requested maximum allowable operating pressure;

(d) The two most recent ultrasonic thickness examination maps; and

(e) Any other documentation required by the NBIC.

(4) During an inspection, an inspector may:

(a) Examine all documents pertaining to the qualifications of the operator; and

(b) Assess an operator's demonstrated understanding of the operational requirements of the historical boiler.

C. Hydrostatic Pressure Test.

(1) A historical boiler shall be hydrostatically tested to a pressure of not less than the maximum allowable operating pressure but no more than 1-1/4 times the maximum allowable operating pressure.

(2) After a repair or alteration, a historical boiler shall be tested hydrostatically to a pressure of not less than 1 'A times the maximum allowable operating pressure but no more than 1 'A times the maximum allowable operating pressure.

(3) An owner shall supply the necessary test equipment required by the inspector for the hydrostatic test including:

(a) Water source, pump, pressure lines, and calibrated test gauge; and

(b) Plugs, gags, or caps to replace safety valves or other appurtenances if needed to prevent damage from the required test pressure.

D. Maximum Allowable Operating Pressure.

(1) The maximum allowable operating pressure shall be determined by the inspector in accordance with the NBIC and ASME Code.

(2) The maximum allowable operating pressure for objects containing wrought iron will be determined by considering the following:

(a) For pressures up to 250 psi a temperature allowance is not required; and

(b) For pressures above 250 psi the allowable stress values shall comply with the requirements of the ASME Code, Section I, PartPG-23.

(3) The maximum allowable operating pressure for objects containing materials other than carbon steel or wrought iron shall be determined in accordance with the ASME Code.

E. Training.

(1) A person who operates a historical boiler shall retain a written record of their training.

(2) Upon request, a person who operates a historical boiler shall provide the Chief Boiler Inspector with a copy of their training record.

F. Historical boilers with a certificate of inspection issued by another jurisdiction may operate in Maryland under the following circumstances:

(1) An owner of a historical boiler may request that the Chief Boiler Inspector recognize a certificate of inspection issued by another jurisdiction;

(2) In evaluating a request for recognition of a certification of inspection by the other jurisdiction, the Chief Boiler Inspector may conduct an inspection of a historical boiler to verify:

(a) Compliance with the NBIC; and

(b) Satisfaction of safety requirements that are equal to or greater than Maryland's requirements;

(3) If the Chief Boiler Inspector conducts an inspection to evaluate a historical boiler with a certificate of inspection from the other jurisdiction, the Chief Boiler Inspector shall examine the following:

(a) Verification and validation of the certificate of inspection from the other jurisdiction;

(b) Examination of all documents required by this regulation and by the NBIC;

(c) Examination of all documents pertaining to the qualifications of the operator;

(d) Demonstrated understanding of the operational requirements by the operator of the historical boiler; and

(e) Other tests at the discretion of the inspector including but not limited to:

(i) An external inspection;

(ii) A determination of the maximum allowable operating pressure in Maryland; and

(iii) Operation at the maximum allowable operating pressure in Maryland; and

(4) If the Chief Boiler Inspector determines that a historical boiler with a certificate of inspection issued by another jurisdiction is in compliance with safety requirements that are equal to or greater than Maryland, the Chief Boiler Inspector shall issue a certificate of inspection.

G. A historical portable steam boiler shall not be operated at a pressure greater than:

(1) 15 psigwhen being moved at a speed of 5 miles per hour or less; and

(2) zero psig when being moved at a speed greater than 5 miles per hour.

(Regulation .34 adopted effective June 30, 1997 (24:13 Md. R. 930); amended effective 45:8 Md. R. 419, eff. 4/23/2018)
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