Reading and extracting information from service drawings and specifications
Overview
This standard identifies the competences you need in order to read and extract information from drawings and specifications relating to factory/building services. In this standard, you will be required to make effective use of text, numerical and graphical information, by interpreting and using technical information extracted from engineering service drawings, specifications, technical data sheets and maintenance manuals, in accordance with approved procedures. You will be required to extract the necessary information from the various drawings and related documents, in order to establish and carry out the maintenance requirements, and to make valid decisions about the quality and performance of the equipment being maintained.
Your responsibilities will require you to comply with organisational policy and procedures for the care and control of the drawings and related specifications. You will be expected to use the drawings and specifications in order to obtain relevant information about the factory services. You will be expected to report any problems with the use and interpretation of the drawings and specifications that you cannot personally resolve, or that are outside your permitted authority, to the relevant people. You will be expected to work with minimal supervision, taking personal responsibility for your own actions and for the quality and accuracy of the work that you carry out.
Your underpinning knowledge will provide a good understanding of the different types of drawings and documents used within a services maintenance environment, and will provide an informed approach to applying instructions and procedures. You will be able to read and interpret the drawings and documents used, and will know about the symbols, notations, conventions, and abbreviations used, in adequate depth to provide a sound basis for carrying out the maintenance activities to the required specification.
Performance criteria
You must be able to:
- use the approved source to obtain the required drawings and specifications
- correctly interpret the drawings and specifications
- identify, extract and interpret the required information
- use the information obtained to ensure that work output meets the specification
- deal promptly and effectively with any problems within your control and report those which cannot be solved
- report any inaccuracies or discrepancies in drawings and specifications
Knowledge and Understanding
You need to know and understand:
- the sources of the drawings and specifications that you use in your work activities
- how drawings and documents are obtained, and how to check that they are current and valid
- how to use other sources of information to support the drawings (such as organisational standards, national and international standards, health and safety documentation) and relevant codes of practice
- the procedures for reporting discrepancies in the drawings, and for reporting lost or damaged drawings/documents
- care and control procedures for the drawings and documents, and the importance of returning the drawings and documents to the designated location on completion of the work activities
- the basic drawing conventions, colour coding of services, symbols and notations used, and why there needs to be different types of drawing
- the types of drawing used, and how they interrelate (such as general layout drawings; piping and cable route diagrams; flow, block, schematic and system diagrams)
- imperial and metric systems of measurement; dimensions and tolerances; scales and reference points
- the meaning of the different symbols, notations and abbreviations found on the drawings used for services (such as electricity, water, gas, fuel oil, compressed air, steam, pressure and flow characteristics)
how damage and contaminants on drawings can lead to delays in carrying out work
the extent of your own responsibility, when to act on your own initiative to find, clarify and evaluate information, and to whom you should report if you have problems that you cannot resolve
Scope/range
Use approved sources to obtain the necessary drawings and related specifications, and carry out all of the following:
- check the currency and validity of the drawings and documents used
- exercise care and control over the documents at all times
- correctly extract all necessary data in order to carry out the required tasks
- seek out additional information where there are gaps or deficiencies in the information obtained
- report any problems found with the drawings/specifications
- make valid decisions based on the data extracted from the documents
- return all drawings and related documents to the approved location on completion of the work
Use information extracted from three of the following services drawings and related documentation, to include:
- approved sketches
- manufacturer/supplier/contractor data
- technical illustrations
- electrical supply, distribution and installation
- software based documentation
- water supply, distribution and installation
- gas supply, distribution and installation
- compressed air supply, distribution and installation
- fuel oil supply, distribution and installation
- layout diagrams (such as schematic, block, physical, system)
- routeing diagrams (such as piping, cables)
- operation and maintenance manuals
- steam supply, distribution and installation general assembly drawings
- general layout drawings (identifying such items as service plant, intake locations, sub-stations, boiler rooms, compressed air supply, buildings)
Use information extracted from related documentation, to include two from the following:
- works instructions
- national, international and organisational standards/codes of practice
- maintenance log/reports
- health and safety standards relating to activity (such as COSHH)
- fault diagnosis guides
- environmental requirements
- test schedules
- organisational standards
- performance charts/readings
Extract information that includes three of the following:
- utility supply details (such as electricity, water, gas), comprising size, nature of supply, metering and equipment details
- service distribution arrangements, including plant and equipment specifications
- locations of services, including standby and emergency backup systems
- maintenance schedules for services equipment
- electrical data and fluid data (relating to steam, water, compressed air, oil)
- protective arrangements and equipment (such as containment, pressure relief valves, environmental controls, warning and evacuation systems and equipment)
- performance characteristics (such as steam, water and operational cycle)