Boilers - Approved Code of Practice for the Design, Safe Operation, Maintenance and Servicing of
Incorporating amendment number 1
The effective date of this code is 13 Jan 2005.
The purpose of this code is to update and bring together into one document the minimum requirements for the design and safe operation, maintenance and servicing of boiler plant. It applies to the safety features and controls of all commercial or industrial boilers.
Table of Contents
Notice of Issue
Foreword
Summary of the Health and Safety in Employment Act 1992
Regulations
Approved codes of practice
Employers' duties
Hazard management
Information for employees
Employers to involve employees in the development of health and safety procedures
Training of employees
Safety of people who are not employees
Employees' and self-employed persons' duties
Accidents and serious harm (recording and notification)
Health and Safety in Employment Regulations 1995
Part 1: General Requirements
1.1 Purpose and application
1.2 Scope
1.3 Background
1.4 Definitions
1.5 General hazards
1.6 Supervision
1.7 Existing boilers
1.8 Upgrading existing shell boilers
1.9 Coupled boilers
1.10 Combustion
1.11 General design requirements
1.12 Manufacture and workmanship
1.13 Fittings
1.14 Water level gauges
1.15 Safety valves
1.16 Pressure gauge
1.17 Blowdown arrangement
1.18 Water treatment
1.19 Feed pumps
1.20 Feedwater systems
1.21 Electrical equipment and supply
1.22 Control components
1.23 Fault alarms and lock-outs
1.24 Testing of controls and alarms
1.25 Boiler control systems including programmable logic controller (PLC)
1.26 Documents and marking
1.27 Duties of controllers
1.28 Maintenance
1.29 Inspection and testing
1.30 Security and protection
1.31 Quality management systems for boilers
1.32 System auditing/monitoring
1.33 Method of application for limited-attendance and unattended boilers operation
1.34 Importers, distributors and resellers
Part 2: Attended Boilers
2.1 Boilers with output greater than 20 MW
2.2 Attended boilers with outputs not exceeding 20 MW
2.3 Controls and mountings
2.4 Low-water lock-outs and alarms
2.5 Feedwater control
2.6 Operational supervision
2.7 Daily tests
Part 3: Limited-Attendance Boilers
3.1 Controls and mountings
3.2 First low-water lock-out and alarm
3.3 Second low-water lock-out and alarm
3.4 Feedwater control
3.5 Feedwater availability lock-out and alarm
3.6 Feedwater low-pressure or low-flow lock-out and alarm
3.7 Forced circulation
3.8 Combustion controls
3.9 Combustion chamber thermal cut-out and alarm
3.10 Power failure safeguards for solid fuel boiler installations
3.11 Alarms
3.12 Visual display
3.13 Operational supervision
3.14 Testing of lock-outs, cut-outs and alarms
3.15 Periodic tests
3.16 Water treatment
3.17 Maintenance of the boiler control and safety systems
Part 4: Under 15 HP Boilers
4.1 General
4.2 Controls and mountings
4.3 Operational supervision
4.4 Under 15 hp boilers built to Standard other than BS 2790: 1982, or to earlier editions of that Standard
4.5 Under 15 hp boilers built to BS 2790:1982, or to later editions of that Standard
4.6 Coupled boilers
4.7 Existing boilers
Part 5: Unattended Boilers
5.1 Operation
5.2 Controls and mountings
5.3 First low-water lock-out alarm
5.4 Second low-water lock-out and alarm
5.5 Feedwater control
5.6 Feedwater availability lock-out and alarm
5.7 Feedwater low-pressure or low-flow lock-out and alarm
5.8 Forced circulation
5.9 Combustion controls
5.10 Combustion chamber thermal cut-out and alarm
5.11 Power failure safeguards for solid fuel boiler installations
5.12 Alarms
5.13 Visual display
5.14 Operational supervision
5.15 Testing of lock-outs, cut-outs and alarms
5.16 Quarterly tests
5.17 Water treatment
5.18 Boiler control system
Part 6: Once-Through Forced Circulation Coil Boilers
6.1 Standards for controls
6.2 Forced circulation coil boilers
6.3 Feedwater pump
6.4 Pressure safety
Part 7: Small Boilers
7.1 Standards for controls
7.2 Operational supervision
Part 8: Pressurised Hot Water Boilers
8.1 Standards
8.2 Types of system
8.3 Automatic controls
8.4 Independent overriding controls
8.5 Electrical failure to safety
8.6 Interruption to the electricity supply
8.7 Boilers using mixing valves
8.8 Safety valves
8.9 Training
8.10 Testing and maintenance
Part 9: Unfired Waste Heat Boilers
9.1 Definition
9.2 Design
9.3 Safety protection devices
9.4 Special applications
APPENDIX A: Principal Standards Accepted for Use in New Zealand in Connection with Boilers
A1. New Zealand Standards
A2. Joint Australian/New Zealand Standards
A3. Australian Standards
A4. British Standards
A5. U.S.A. Standards
A6. Miniature Boiler Standards (for information - not covered by the code)
A7. Existing boilers
APPENDIX B: Clauses from AS 2593: 1995 to be Considered for Boiler Design Purposes
APPENDIX C: Information Needed by the Authority with First Application to Operate an Unattended or Limited Attendance Boiler
C1. Method of application for limited-attendance boiler operation and unattended boiler operation
C2. Operation and maintenance
APPENDIX D: Guidelines for the Design Verification of Boiler Control Systems (BCS)
D1. Type acceptance of boiler controls
D2. Documentation and design statements
D3. The use of control components not covered by an 'applicable standard'
D4. Design verification of boiler controls
APPENDIX E: Commissioning Test of Boiler Control System for Limited-Attendance and Unattended Boilers
APPENDIX F: Boiler Ratings
F1. Boiler output rating
F2. 'From and at' evaporative capacity rating
F3. Boiler 'horsepower rating'
APPENDIX G: Conformity Assessment
G1. Introduction
G2. Inspection bodies
G3. Quality management system
G4. Design verification
G5. Fabrication inspection
APPENDIX H: Accident Notification (No Serious Harm)
