Certificate in Hazardous Areas for Engineers & Technicians
OBJECTIVES
Upon completion of this workshop you will be able to:
- Use correct hazardous areas terminology and definitions
- Explain the responsibilities of hazardous area owners and equipment suppliers
- Explain how apparatus is made safe and suitable for use in hazardous areas
- Provide an understanding of the different types of protection
- Be exposed to simple area classification schemes
- Examine different approaches for selection of types of protection
- Compare techniques used for power and instrumentation applications
- Explain how marking and identification of such apparatus is applied
- Understand the requirements for maintenance of such apparatus
- Understand the requirements for inspection in hazardous area
- Discuss how work permits systems must be adopted for hazardous area working
- Discuss and compare the advantages and disadvantages of different types of protection in given applications
- Compare certification and approval concepts
- Effectively communicate with others on such safety issues
OVERVIEW
This course provides a comprehensive technical approach to hazardous areas. It explains the subject of explosion protection applied to electrical equipment in such areas. The course offers detailed explanations of the principles involved, the techniques used, the management structures and requirements to comply with the harmonized international standards that are now in place. Where potentially flammable atmospheres are encountered in industrial processes, area classification is mandatory as part of a risk assessment for the management of health and safety; the issues are examined by providing the opportunity to apply this process and understand the importance and extent of the co-operation of the disciplines involved. Requirements of inspection and maintenanceare examined to show the importance of theireffectiveness once the correct installation hasbeen properly achieved, and to enablemanagement to form a structured andeffective regime to assure safety.
This course would alsobe appropriate for supervisors and managers,with the emphasis on outlining themanagement responsibility and enablingthem to complement and accommodate theneeds of technical staff beneath them. It is acommon problem that technical staff are trained in what needs to be done but their management does not appreciate this or understand it. This course will address these shortcomings.
COURSE OUTLINE
UNIT 1:Background and History
The need for explosion protection
Lessons from disaster investigation
Concept of certification
Risk assessment
UNIT 2:Ignition Characteristics
Fire triangle
Flammability characteristics
Ignition sources
Apparatus grouping
UNIT 3:Area Classification Theory
Objectives
Terminology and definitions
Sources of release and ventilation
Zoning
Presentation, communication and monitoring
Responsibilities
Types of protection suitability
UNIT 4:Area Classification Practice
Process of decision making
Assessment and calculation
Other 'codes of practice'
Examples and tabulations
UNIT 5:Ex d
Flameproof
Theory of operation
Flamepath joint types
Dimensions and condition
Apparatus and component certification
UNIT 6:Ex i & Systems
Intrinsic safety
Simple apparatus
Apparatus and system concepts
Interfaces
Apparatus matching
Descriptive system documentation
UNIT 7:Ex e and Ex n
Increased safety
Limitations of use
Insulation and connection integrity
Enclosure requirements
Non-incendive
The difference in approach
UNIT 8:Ex Types: p, o, q, m and s
Features of these other types of protection
Pressurisation and purging, oil immersion, sand-filling and encapsulation.
Special protection
Combined protection types
UNIT 9:Installation
General requirements
Information flow
Cabling requirements
Electrical protection
Earthing and bonding
Specific requirements for different types of Protection
UNIT 10:Inspection
General requirements
Periodicity and grade
Scheduling
Maintenance
Responsibilities
Testing and fault-finding issues
UNIT 11:Certification and Marking
Summary of certification
Marking of older apparatus
Types of certificate and information contained
Conditions placed on the use of apparatus
Multiple certification techniques and benefits
UNIT 12:European ATEX Requirements
ATEX and the international standards
Product marking
"Product" directive
"Workers" directive (The DSEAR in UK)