1. A. In these regulations, the following terms have the meanings indicated.

2. B. Terms Defined.

   1. (1) “ASME Code” means the “ASME Boiler and Pressure Vessel Code” of the American Society of Mechanical Engineers with revisions, amendments, and interpretations adopted by the Board of Boiler Rules.

   2. (2) “Antique boiler” means a boiler that is:

      1. (a) Fabricated and stamped:

         1. (i) In accordance with the ASME Code or another nationally recognized boiler construction standard; and
         2. (ii) More than 30 years before the date of the inspection;
      2. (b) Operated primarily for demonstration, exhibition, or instructional purposes and not for profit; or
      3. (c) Constructed, inspected, and stamped in accordance with the ASME Code and registered with the National Board of Boiler and Pressure Vessels Inspectors to replace a historical boiler.
   3. (3) “Approved” means approved by the Board of Boiler Rules.

   4. (4) “Authorized Inspection Agency” means an entity that:

      1. (a) Is accredited in accordance with the National Board of Boiler and Pressure Vessel Inspectors NB-369, Qualifications and Duties for Authorized Inspection Agencies Performing Inservice Inspection Activities and Qualifications for Inspectors of Boilers and Pressure Vessels;
      2. (b) Is accredited in accordance with the National Board of Boiler and Pressure Vessel Inspectors NB-371, Accreditation of Owner-User Inspection Organizations (OUIO); or
      3. (c) Meets the qualifications and definition of the National Board of Boiler and Pressure Vessel Inspectors NB-360, Criteria for Acceptance of Authorized Inspection Agencies for New Construction.
   5. (5) “Authorized Insurer” means an authorized inspection agency licensed to insure boilers and pressure vessels in Maryland.
   6. (6) “Board” means the Board of Boiler Rules.

   7. (7) “Boiler external piping” means piping which:

      1. (a) Begins where the boiler proper terminates at the:

         1. (i) First circumferential joint for welded end connections;
         2. (ii) Face of the first flange in bolted flanged connections; or
         3. (iii) First threaded joint in threaded connections; and
      2. (b) Extends up to and including the valve or valves required by Section I or Section IV of the ASME Code.
   8. (8) “Certificate of Competency” means a certificate issued by the Chief Boiler Inspector indicating the suitability and fitness of an individual to inspect boilers and pressure vessels in Maryland.
   9. (9) “Certificate inspection” means an inspection the report of which is used by the Chief Boiler Inspector to determine whether to issue a certificate.
   10. (10) “Certificate of inspection for repair or alteration” means the certificate inspection performed after a repair or alteration to determine suitability of the object for return to service.
   11. (11) “Commissioner” means the Commissioner of Labor and Industry.
   12. (12) “Condemned boiler or pressure vessel” means a boiler or pressure vessel that has been inspected and declared unsafe or declared disqualified under legal requirements by an inspector who is authorized to take such action and who has applied a stamp or mark designating condemnation.
   13. (13) “Electric boiler” means a boiler in which the source of heat is electricity.

   14. (14) “Existing boiler or pressure vessel installation” means:

       1. (a) A boiler constructed, installed, placed in operation, or contracted for before July 1, 1969, excluding antique boilers, historical boilers or model steam boilers; or
       2. (b) A pressure vessel constructed, installed, placed in operation, or contracted for before January 1, 1974, excluding antique boilers, historical boilers or model steam boilers.
   15. (15) “External inspection” means an inspection made when a boiler or pressure vessel is in operation.
   16. (16) “Follow up inspection” means an inspection performed after a boiler or pressure vessel has been determined to be nonconforming with applicable laws and regulations.

   17. (17) Heating Boiler.

       1. (a) “Heating boiler” means:

          1. (i) A steam boiler that operates at pressures not exceeding 15 PSIG; or
          2. (ii) A hot water boiler operated at pressures not exceeding 160PSIG or temperatures not exceeding 250°F at or near the boiler outlet.
       2. (b) “Heating boiler” includes a vessel used in connection with it as an expansion tank.
   18. (18) “High-pressure, high-temperature water boiler” means a water boiler that operates at pressures exceeding 160 PSIG or temperatures exceeding 250°F at or near the boiler outlet.

   19. (19) “Historical boiler” means a boiler that is:

       1. (a) Riveted and/or welded construction;
       2. (b) Not under the jurisdiction of the Federal Railroad Administration;
       3. (c) Not used for profit; and
       4. (d) An antique boiler, steam tractor, traction engine, hobby steam boiler, or portable steam boiler that is preserved, restored, and maintained for demonstration, viewing, or educational purposes.
   20. (20) “Hobby steam boiler” means a model steam boiler.
   21. (21) “Hot water heating boiler” means a heating boiler furnishing hot water circulated to return to itself.
   22. (22) “Hot water supply boiler” means a heating boiler furnishing hot water for use external to itself.
   23. (23) “Individually fabricated” means constructed, inspected, and stamped in accordance with the ASME Code, or other standard accepted by the Chief Boiler Inspector.
   24. (24) “Inspector” means the chief boiler inspector, a deputy boiler inspector, or a special inspector.
   25. (25) "Installer” means an individual, firm, association, corporation, or other entity that installs or constructs boilers or pressure vessels.
   26. (26) “Internal inspection” means an examination as complete as possible of the internal and external surfaces of a boiler or pressure vessel conducted while it is not in operation, and with all manhole plates, hand hole plates, and other coverings of inspection openings removed.
   27. (27) “Kitchen” means an area used for the preparation or processing of food for human consumption.
   28. (28) “Kitchen equipment boiler” means a boiler located in a kitchen, and used for cooking or related purposes.
   29. (29) “Lap-seam crack” means a crack in a lap-seam of a boiler or pressure vessel parallel to a longitudinal joint, either between or adjacent to rivet holes.
   30. (30) “Maryland inspection report form” means the form submitted by an inspector and available on the Department’s website.

   31. (31) “Miniature boiler” means a boiler when none of the following limitations are exceeded:

       1. (a) 16 inches inside diameter of shell;
       2. (b) 20 square feet heating surface, except for an electric boiler;
       3. (c) 5 cubic feet gross volume, exclusive of casing and insulation; and
       4. (d) 100 psig maximum allowable working pressure.
   32. (32) “Model steam boiler” means a boiler that is individually fabricated for non-commercial use and that is used primarily for demonstration, exhibition, or educational purposes, and not used for profit.
   33. (33) “Maximum allowable operating pressure” means the maximum pressure at which a boiler or pressure vessel is permitted to operate as determined by an inspector after an inspection and which is equal to or less than the maximum allowable working pressure.
   34. (34) “Maximum allowable working pressure” means the maximum pressure at which a boiler or pressure vessel is designed to operate as determined by the manufacturer in accordance with the construction code.
   35. (35) “Modular boiler system” means a series of boiler units specifically designed to be used singularly or together in sequential operation.
   36. (36) “National Board” means the National Board of Boiler and Pressure Vessel Inspectors.
   37. (37) “NBIC” means the National Board Inspection Code.

   38. (38) “New boiler or pressure vessel installation” means:

       1. (a) A boiler constructed, installed, placed in operation, or contracted for after July 1, 1969; or
       2. (b) A pressure vessel constructed, installed, placed in operation, or contracted for after January 1, 1974.

   39. (39) “Nonstandard boiler or pressure vessel” means a boiler or pressure vessel that does not bear the stamp of:

       1. (a) Maryland;
       2. (b) Another jurisdiction which has adopted a standard of construction equivalent to that required by the Board of Boiler Rules;
       3. (c) The ASME; or
       4. (d) The National Board.
   40. (40) “Owner” means a person, firm, or corporation owning or operating a boiler or pressure vessel within Maryland.
   41. (41) “Owner-user inspection service” means an owner of a boiler or pressure vessel in Maryland, who maintains a regularly established inspection department whose inspection procedures meet the applicable requirements of the National Board of Boiler and Pressure Vessel Inspectors and are acceptable to the Board.
   42. (42) “Person” means an installer, owner, or operator of a boiler or pressure vessel, a repair organization, or a company licensed to insure or inspect boilers and pressure vessels in the State.

   43. (43) “Portable boiler or pressure vessel” means a boiler or pressure vessel that is not historical but meets the following requirements:

       1. (a) Is set on a frame, platform or trailer; and
       2. (b) Is designed to be moved to different locations for use.

   44. (44) “Portable steam boiler” means a historical boiler that is:

       1. (a) Not self-propelled;
       2. (b) Set on a frame, platform, or trailer; and
       3. (c) Designed to be moved to different locations for use.
   45. (45) “Power boiler” means a boiler in which steam or other vapor is generated at a pressure of more than 15 PSIG, and includes a high-pressure, high-temperature water boiler.
   46. (46) “PSIG” means pounds per square inch gauge.

   47. (47) “Standard boiler or pressure vessel” means a boiler or pressure vessel that:

       1. (a) Bears the stamp of Maryland;
       2. (b) Bears the stamp of another jurisdiction which has adopted a standard of construction equivalent to that required by the Board of Boiler Rules;
       3. (c) Bears the stamps of both ASME and the National Board; or
       4. (d) Is of equivalent safe construction acceptable to the Board.
   48. (48) “Used boiler or pressure vessel” means a boiler or pressure vessel which has been removed from its original setting and reinstalled at the same or different location.

   49. (49) “Water heater” means a closed vessel with openings through which water may flow and includes:

       1. (a) An apparatus by which heat is generated;
       2. (b) Controls necessary to prevent pressures greater than 160 psig and water temperatures greater than 210 degrees F; and
       3. (c) Potable water that is withdrawn for external use.
   50. (50) “Workday” means a day that is not a Saturday, a Sunday, or a State holiday.

Authority: Public Safety Article, Title 12, Annotated Code of Maryland
Ch. 351, Acts of 2004

Effective date: October 15, 1975 (2:23 Md. R. 1414)

Regulation .02CC amended and .02DD repealed effective June 1, 1982 (9:8 Md. R. 821)

Regulation .02PP amended effective November 4, 1985 (12:22 Md. R. 2103)

Regulations .07—.08 adopted effective November 4, 1985 (12:22 Md. R. 2103)

Regulations .01—.08 repealed and new Regulations .01—.32 adopted effective June 1, 1989 (16:10 Md. R. 1106)

Regulation .01B amended effective September 1, 1989 (16:16 Md. R. 1749); April 16, 1990 (17:7 Md. R. 848); October 7, 1996 (23:20 Md. R. 1422); June 30, 1997 (24:13 Md. R. 930)

Regulation .01B amended as an emergency provision effective July 14, 1999 (26:16 Md. R. 1237); amended permanently effective October 4, 1999 (26:20 Md. R. 1545)

Regulation .01B amended effective July 10, 2000 (27:13 Md. R. 1211)

Regulation .01-1 amended effective January 31, 1994 (21:2 Md. R. 98); July 18, 1994 (12:14 Md. R. 1228); November 20, 1994 (21:25 Md. R. 1933); July 3, 1995 (22:13 Md. R. 966); January 15, 1996 (23:1 Md. R. 23); April 22, 1996 (23:8 Md. R. 604); August 12, 1996 (23:16 Md. R. 1175); June 30, 1997 (24:13 Md. R. 930); November 3, 1997 (24:22 Md. R. 1551); July 10, 2000 (27:13 Md. R. 1211); February 19, 2001 (28:3 Md. R. 205)

Regulation .01-1A(1) amended as an emergency provision effective July 14, 1999 (26:16 Md. R. 1236); amended permanently effective October 4, 1999 (26:20 Md. R. 1545)

Regulation .01-2 adopted effective October 11, 1993 (20:20 Md. R. 1569)

Regulation .01-2 amended effective June 30, 1997 (24:13 Md. R. 930)

Regulation .02A amended effective October 7, 1996 (23:20 Md. R. 1422); July 10, 2000 (27:13 Md. R. 1211); February 19, 2001 (28:3 Md. R. 205)

Regulation .03B amended effective July 3, 1995 (22:13 Md. R. 966)

Regulation .09 amended effective March 5, 1990 (17:4 Md. R. 496)

Regulation .14G adopted effective October 11, 1993 (20:20 Md. R. 1569)

Regulation .15 amended effective September 3, 1990 (17:17 Md. R. 2078)

Regulation .17A amended effective October 11, 1993 (20:20 Md. R. 1569)

Regulation .17A amended as an emergency provision effective July 14. 1999 (26:16 Md. R. 1237); amended permanently effective October 4, 1999 (26:20 Md. R. 1545)

Regulation .17E amended effective September 1, 1989 (16:16 Md. R. 1749)

Regulation .22B amended effective July 3, 1995 (22:13 Md. R. 966)

Regulation .25B amended as an emergency provision effective July 14, 1999 (26:16 Md. R. 1237); amended permanently effective October 4, 1999 (26:20 Md. R. 1545)

Regulation .26B amended effective July 3, 1995 (22:13 Md. R. 966)

Regulation .27 amended as an emergency provision effective July 14, 1999 (26:16 Md. R. 1237); amended permanently effective October 4, 1999 (26:20 Md. R. 1545)

Regulation .27B amended effective August 5, 1991 (18:15 Md. R. 1725); November 20, 1994 (21:23 Md. R. 1933)

Regulation .27C adopted effective August 5, 1991 (18:15 Md. R. 1725)

Regulation .27C amended effective October 11, 1993 (20:20 Md. R. 1569)

Regulation .28A amended effective June 30, 1997 (24:13 Md. R. 930)

Regulation .31D amended effective November 20, 1994 (21:23 Md. R. 1933)

Regulation .32 amended and recodified to Regulation .01-1 effective October 11, 1993 (20:20 Md. R. 1569)

Regulation .32A amended effective April 16, 1990 (17:7 Md. R. 848)

Regulation .33 adopted effective September 1, 1989 (16:16 Md. R. 1749)

Regulation .33A amended, B repealed effective June 30, 1997 (24:13 Md. R. 930)

Regulation .34 adopted effective June 30, 1997 (24:13 Md. R. 930)

Chapter revised as an emergency provision effective August 10, 2001 (28:17 Md. R. 1551); revised permanently effective November 12, 2001 (28:22 Md. R. 1936)

Regulation .01B amended effective December 12, 2002 (29:24 Md. R. 1919); April 23, 2018 (45:8 Md. R. 419)

Regulation .01-1 amended effective April 19, 2021 (48:8 Md. R. 308)

Regulation .01-1A amended effective September 29, 2003 (30:19 Md. R. 1331); March 17, 2014 (41:5 Md. R. 342)

Regulation .01-1A, B amended effective September 2, 2002 (29:17 Md. R. 1380)

Regulation .01-1A, C amended effective April 23, 2018 (45:8 Md. R. 419)

Regulation .01-1B, C amended effective December 12, 2002 (29:24 Md. R. 1919)

Regulation .01-2 amended effective December 12, 2002 (29:24 Md. R. 1919); April 23, 2018 (45:8 Md. R. 419)

Regulation .03B, C amended and D adopted effective September 30, 2002 (29:19 Md. R. 1523)

Regulation .08 amended effective April 23, 2018 (45:8 Md. R. 419)

Regulation .09 amended effective April 23, 2018 (45:8 Md. R. 419)

Regulation .14 recodified to Regulation .14-1 and new Regulation .14 adopted as an emergency provision effective July 9, 2004 (31:18 Md. R. 1348); adopted permanently effective September 27, 2004 (31:19 Md. R. 1431)

Regulation .14C amended effective April 23, 2018 (45:8 Md. R. 419)

Regulation .14D adopted effective April 23, 2018 (45:8 Md. R. 419)

Regulation .14-1G amended effective April 23, 2018 (45:8 Md. R. 419)

Regulation .15B amended effective April 23, 2018 (45:8 Md. R. 419)

Regulation .16 amended as an emergency provision effective December 22, 2008 (36:2 Md. R. 96); emergency status extended at 36:17 Md. R. 1310; emergency status expired November 19, 2009

Regulation .16 amended effective April 23, 2018 (45:8 Md. R. 419)

Regulation .16-1 adopted as an emergency provision effective December 22, 2008 (36:2 Md. R. 96); emergency status extended at 36:17 Md. R. 1310; emergency status expired November 19, 2009

Regulation .16-1 adopted effective December 26, 2011 (38:26 Md. R. 1696)

Regulation .16-1 amended effective April 23, 2018 (45:8 Md. R. 419)

Regulation .17 amended effective April 23, 2018 (45:8 Md. R. 419)

Regulation .17C amended effective December 12, 2002 (29:24 Md. R. 1919)

Regulation .19 repealed and new Regulation .19 adopted effective April 23, 2018 (45:8 Md. R. 419)

Regulation .27A amended effective September 29, 2003 (30:19 Md. R. 1331); April 23, 2018 (45:8 Md. R. 419)

Regulation .27C adopted effective April 23, 2018 (45:8 Md. R. 419)

Regulation .28 amended effective April 23, 2018 (45:8 Md. R. 419)

Regulation .28G amended effective July 16, 2020 (47:14 Md. R. 675)

Regulation .28-1 amended effective April 23, 2018 (45:8 Md. R. 419)

Regulation .28-2B, F amended effective April 23, 2018 (45:8 Md. R. 419)

Regulation .28-3 amended effective April 23, 2018 (45:8 Md. R. 419)

Regulation .29 amended effective April 23, 2018 (45:8 Md. R. 419)

Regulation .34 amended effective April 23, 2018 (45:8 Md. R. 419)

Regulation .35 amended effective April 23, 2018 (45:8 Md. R. 419)

Regulation .37 adopted effective December 12, 2002 (29:24 Md. R. 1919)

Regulation .38 adopted effective December 12, 2002 (29:24 Md. R. 1919)