Marking off for the manufacture of marine steelwork components
Overview
This standard identifies the competences you need to mark off plate and rolled sections for the manufacture of marine steelwork components, in accordance with approved procedures. You will be required to select the required materials to use, and the appropriate marking out tools and equipment, based on the information presented to you and the accuracy to be achieved. Marking off will be the preparation required for cutting, shaping and forming of plate and sections, as appropriate to the application and could include marking out workpiece datums, centre lines, angles and curved details, bending details - including bending allowances, hole centring and outlining details.
Your responsibilities will require you to comply with organisational policy and procedures for the marking-off activities undertaken and to report any problems with the materials, equipment or marking-off activities that you cannot resolve yourself, or are outside your permitted authority, to the relevant people. You will be expected to work to instructions, with a minimum of supervision, taking personal responsibility for your own actions and the quality and accuracy of the work that you carry out.
Your underpinning knowledge will be sufficient to provide a sound basis for your work and will provide an informed approach to applying marking-off procedures in a marine fabrication environment. You will have an understanding of the marking-off process, and its application and will know about the materials as well as the care and use of marking out tools, in adequate depth to provide a sound basis for carrying out the activities to the required specification.
You will understand the safety procedures required when using marking mediums and when carrying out the marking- off activities. You will be required to demonstrate safe working practices throughout and will understand the responsibilities you owe to yourself and others in the workplace.
Performance criteria
You must be able to:
- work safely at all times, complying with health and safety and other relevant regulations, directives and guidelines
obtain and use the correct information for marking off
obtain the appropriate marking off equipment and check that it is in a usable condition
- prepare suitable datum's and marking out surfaces
- mark off using appropriate methods
check that the marking off complies with the specification and relevant standards
deal promptly and effectively with problems within your control and report those that cannot be resolved
Knowledge and Understanding
You need to know and understand:
- the specific safety precautions to be taken when carrying out marking-off activities in a marine fabrication environment and when using plate or rolled section materials, both on land and onboard vessels (including general workshop and site safety, appropriate personal protective equipment, accident procedure; statutory regulations, risk assessment procedures and COSHH regulations)
- the personal protective clothing and equipment (PPE) to be worn when carrying out the marking-off activities
- the correct methods of moving or lifting plate and rolled section materials
- the hazards associated with marking off fabricated components (such as working in a marine fabrication environment, lifting and handling plate/fabricated components, slivers/burrs on plate materials, using marking-out mediums, using laser marking-out equipment) and how they can be minimised
- how to obtain and interpret information from job instructions, engineering drawings and specifications, in relation to the work undertaken
- the preparations to be carried out on the material prior to marking out, to enhance clarity, accuracy and safety
- the use of patterns and templates as aids to assist in the marking-out process
- principles of marking out, developing basic shapes (including flat, rectangular and cylindrical) from flat plate or rolled section materials
- the various marking-out tools and equipment that can be used to mark off straight lines, angles, circles and profiles
- use of marking-out conventions, datum edges/lines and centre lines
- ways of laying out the shapes/patterns to maximise the use of plate or sheet material
- methods of marking out large or long shapes
- marking out and transferring information from templates
- the care and control procedures for marking-out tools and equipment
- why tool/equipment control is critical and what to do if a tool or piece of equipment is unaccounted for on completion of the activities
- the need for clear and dimensional accuracy in marking out to specifications/drawings
- the problems that can occur in marking out the marine components and how these can be avoided
- the extent of your own responsibility and whom you should report to if you have problems that you cannot resolve
Scope/range
Scope Performance
Mark off marine components on two materials from the following:
- carbon steel plate
- stainless steel
- carbon steel sections
- non-metallic materials
- aluminium
- other specific material
Use marking out methods and techniques, including one of the following:
- direct marking using instruments
- tracing/transfer methods
- use of templates
Mark off plate or sections for three of the following components:
- deck plates
- bulkheads
- shell plates
- intercostals/wash plates
- transverses/longitudinal girders
- beam knees/brackets
- frames/longitudinal/stiffeners
- web supports
Mark off plate or section using six of the following:
- scriber
- protractor
- punch
- dividers or trammels
- rule and tape
- chalk line
- straight edge
- templates
- square
- laser
- combination/tri square
- bevel gauge
- profile gauge
french chalk
marker pen
- other specific marking off process
Mark off material, to include five of the following features:
- datum and centre lines
- bend guide lines
- square/rectangular profiles
- angles
- irregular shapes
- hole centring and outlining (linear)
- circles
- hole centring and outlining (circular)
- curved profiles
Produce marked-off components which meet all of the following standards:
- company/client standards
- dimensionally accurate (to drawing or specification)
- clearly defined for required processes
- use recognised marking out conventions
Scope Knowledge
Values
Behaviours
You will be able to apply the appropriate behaviours required in the workplace to meet the job profile and overall company objectives, such as:
- strong work ethic
- positive attitude
- team player
- dependability
- responsibility
- honesty
- integrity
- motivation
- commitment