6.420.100 - Observation and inspection of boilers
A. The minimum requirements for operation and inspection of each type and capacity of equipment are as set forth in this Section 6.420.100 and Tables A and B for 6.420.100.
B. Constant attendance. When constant attendance is required by this Chapter 6.420, the engineer or boiler operator in charge of a boiler, boiler plant, or steam engine shall not leave the boiler room or engine room when the boiler or steam engine is being operated without first either stopping the steam engine and shutting off all sources of heat in the boiler, or being relieved by a person duly licensed under this Chapter 6.420.
Exception: The steam engineer or boiler operator may take an occasional break without stopping the engine, shutting down the boiler or being relieved. In no case may any break last more than 20 minutes.
C. Checked by boiler supervisor. When this chapter requires a boiler to be checked by a boiler supervisor, the boiler supervisor shall inspect all controls and safety devices pursuant to the requirements of subsection 6.420.120.D, as a minimum.
D. Checked by licensed operator. When this Chapter 6.420 requires a boiler to be checked by a licensed operator, a person holding a license issued under this Chapter 6.420 shall perform a physical examination of the boiler or engine to ensure proper operation and maintenance pursuant to the requirements of Sections 6.420.110 and 6.420.150, as a minimum.
E. Twice daily check. When this Chapter 6.420 requires twice daily checks, the inspections that are required to be recorded in the boiler logbook by Section 6.420.110 shall be performed at least two times each day. The first check of the day shall be made not less than eight hours after the last recorded check of the previous day; the second check of the day shall be made at least six hours after the first recorded check of the day. Additional checks may be made to ensure safe operation of a boiler. Twice daily checks may not be performed by a Boiler Supervisor unless the Boiler Supervisor is a full time employee of the boiler owner.
F. Check once every two hours. When this Chapter 6.420 requires a check every two hours, a physical examination of the boiler or engine to ensure proper operation and maintenance pursuant to the requirements of Sections 6.420.110 and 6.420.150, as a minimum, shall be made at least once every two hours.
G. For purposes of Tables A and B for 6.420.100, the input ratings of boilers shall be computed as follows:
1. For gas, propane, and similar burners, the rating shall be equal to the burner input as rated and labeled by the burner manufacturer. Where actual fuel flow during burner operation at the maximum firing rate can be reliably measured, the burner input may be computed by such method.
2. For oil burners, the rating shall be equal to the gallons-per-hour rating of the fuel nozzle or nozzles.
3. For electric boilers, the rating shall be equal to the electrical input in KW as rated and labeled by the boiler manufacturer.
4. In the case of multiple fuel burners, the rating shall be the greater of all computed inputs.
5. For boilers in battery (connected to a common header), the rating shall be the cumulative input, as measured in subsections 6.420.100.G.1 through 6.420.100.G.4. For boilers in battery wired so that only a single boiler can operate at a given time, the license requirement shall be determined by the most restrictive individual license requirement for any boiler in the battery.
6. For regenerative systems, the BHP of the prime mover (gas turbine, engine, etc.) will determine the grade for downstream recovery boilers and steam turbines.
H. All checks of boilers pursuant to the requirements of this Chapter 6.420 shall be logged and recorded as set forth in Section 6.420.110.
Table A for 6.420.100 License Requirements for Operation of Power Boilers and Steam Engines
Type of Boiler | Minimum License Requirement
A. All Boilers
0—100 psi and 0—100 kBtuh input | No license required
B. Electric Boilers
Not exceeding 1.5 cu. ft. and not exceeding 100 psi | No license required
C. All Boilers except Small Power Boilers
Less than 1,000 kBtuh input each; not certified as Automatic. No more than 2 steam boilers on same header. 1 | Check by a Grade IV Boiler Operator once every two hours
D. Small Power Boilers
Maximum 800 kBtuh input; not certified as Automatic. No more than 2 steam boilers on same header | Semiannual check by a Grade III Boiler Supervisor and twice daily checks by a Small Power Boiler Operator; or a Small Power Boiler Operator on premises
E. Boilers Certified as Automatic
1. Maximum 20,000 kBtuh input. No more than 2 steam boilers on same header with a combined capacity no more than 20,000 kBtuh 1 | Check by a Grade IV Boiler Operator once every two hours
2. More than 20,000 to 50,000 kBtuh input | Check by a Grade III Steam Engineer once every two hours
3. More than 50,000 to 300,000 kBtuh input | Check by a Grade II Steam Engineer once every two hours
4. More than 300,000 kBtuh input | Check by a Grade I Steam Engineer once every two hours
F. Boilers Certified as Monitored
1. Maximum 20,000 kBtuh input. No more than 2 steam boilers on same header with a combined capacity no more than 20,000 kBtuh 1 | Monthly checks by a Grade III Boiler Supervisor and twice daily checks by a Grade IV Boiler Operator
2. More than 20,000 to 50,000 kBtuh input | Monthly checks by a Grade III Boiler Supervisor and twice daily checks by a Grade III Steam Engineer
3. More than 50,000 to 300,000 kBtuh input | Monthly checks by a Grade II Boiler Supervisor and twice daily checks by a Grade II Steam Engineer; or Weekly checks by a Grade II Boiler Supervisor and twice daily checks by a Grade III Steam Engineer.
4. More than 300,000 kBtuh input | Monthly checks by a Grade I Boiler Supervisor and twice daily checks by a Grade I Steam Engineer; or Weekly checks by a Grade I Boiler Supervisor and twice daily checks by a Grade II Steam Engineer.
G. All Other Boilers
1. Maximum 20,000 kBtuh input. No more than 2 steam boilers on same header with a combined capacity no more than 20,000 kBtuh 1 | Constant attendance by a Grade IV Boiler Operator
2. More than 20,000 to 50,000 kBtuh input | Constant attendance by a Grade III Steam Engineer
3. More than 50,000 to 300,000 kBtuh input | Constant attendance by a Grade II Steam Engineer
4. More than 300,000 kBtuh input | Constant attendance by a Grade I Steam Engineer
H. Steam Engines
1. Maximum 250 BHP | Constant attendance by a Grade III Steam Engineer or the same attendance requirements as the boiler serving the engine
2. More than 250 to 1,500 BHP | Constant attendance by a Grade II Steam Engineer or the same attendance requirements as the boiler serving the engine
3. More than 1,500 BHP | Constant attendance by a Grade I Steam Engineer or the same attendance requirements as the boiler serving the engine
Table B for 6.420.100 License Requirements for Operation of Low Pressure Boilers
Type of Boiler | Minimum License Required
A. All types of boilers
Less than 2,500 kBtuh input | No license required
B. Boilers Not Certified as Automatic or Monitored
1. 2,500 to 5000 kBtuh max input. | Grade V Boiler Operator on premises
2. More than 5,000 to 20,000 kBtuh max input. No more than 2 steam boilers on same header with a combined capacity no greater than 20,000 kBtuh. 1 | Constant attendance by a Grade IV Boiler Operator
3. More than 20,000 to 50,000 kBtuh max input. | Constant attendance by a Grade III Steam Engineer
4. More than 50,000 to 300,000 kBtuh max input. | Constant attendance by a Grade II Steam Engineer
5. More than 300,000 kBtuh max input. | Constant attendance by a Grade I Steam Engineer
C. Boilers Certified as Automatic
1. 2,500 to 5000 kBtuh max input | Monthly checks by a Grade III Boiler Supervisor, or quarterly checks by a Grade III Boiler Supervisor and twice daily checks by a Grade V Boiler Operator, or a Grade V Boiler Operator on premises
2. More than 5000 kBtuh to 20,000 kBtuh max input. No more than 2 steam boilers on same header with a combined capacity no more than 20,000 kBtuh 1 | Quarterly checks by a Grade III Boiler Supervisor and twice daily checks by a Grade IV Boiler Operator
3. More than 20,000 kBtuh—50,000 kBtuh max input. | Quarterly checks by a Grade III Boiler Supervisor and twice daily checks by a Grade III Steam Engineer
4. More than 50,000 kBtuh to 300,000 kBtuh max input. | Quarterly checks by a Grade II Boiler Supervisor and twice daily checks by a Grade II Steam Engineer.
5. Over 300,000 kBtuh max input. | Quarterly checks by a Grade I Boiler Supervisor and twice daily checks by a Grade I Steam Engineer
D. Boilers as Monitored
1. 2,500 to 5000 kBtuh max input. | Quarterly checks by a Grade III Boiler Supervisor.
2. More than 5,000 to 20,000 kBtuh max input. No more than 2 steam boilers on same header with a combined capacity no more than 20,000 kBtuh 1 | Semiannual checks by a Boiler Supervisor and twice daily checks by a Grade IV Boiler Operator.
3. More than 20,000 to 50,000 kBtuh max input. 1 | Semiannual checks by a Boiler Supervisor and twice daily checks by a Grade III Steam Engineer.
4. More than 50,000 to 300,000 kBtuh max input. | Semiannual checks by a Grade II Boiler Supervisor and twice daily checks by a Grade II Steam Engineer; or Quarterly checks by a Grade II Boiler Supervisor and twice daily checks by a Grade III Steam Engineer.
5. Over 300,000 kBtuh max input. | Semiannual checks by a Grade I Boiler Supervisor and twice daily checks by a Grade I Steam Engineer; or Quarterly checks by a Grade I Boiler Supervisor and twice daily checks by a Grade II Steam Engineer.
Footnote to Tables A and B for 6.420.100: A Grade IV Boiler Operator may operate more than two steam or vapor boilers with a greater combined capacity when the operator is the head operator on duty and under the direct on-site supervision of a licensed steam engineer for the purpose of training. The boilers shall not exceed the capacity permitted by the license of the supervising engineer.
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(Ord. 126359, § 1, 2021; Ord. 122115, § 2, 2006.)
