Producing marine sheet metal assemblies
Overview
This standard identifies the competences you need to produce marine sheet metal (up to and including 3mm) assemblies, in accordance with approved procedures. You will be required to interpret specifications and drawings correctly, to bring together, assemble and join, in the right order, sheet metal components and/or light sections, in order to construct complete marine assemblies or sub-assemblies, such as ducting, tanks, cylindrical sections, conical sections, reduction pieces. You will be required to lay out and secure the various component parts of the structure, using mechanical fastenings, resistance welding or self-securing methods in the correct order and to ensure that they are assembled in a manner that is fit for purpose.
Your responsibilities will require you to comply with organisational policy and procedures for the marine sheet metal assembly activities undertaken and to report any problems with the activities, tools, equipment or materials that you cannot personally resolve, or are outside your permitted authority, to the relevant people. You will be expected to work with a minimum of 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 your work and will provide an informed approach to applying marine sheet metal assembly techniques and fixing procedures. You will understand the assembly techniques used and their application. You will know about the methods of assembling the components of the required strength and that are fit for purpose, in adequate depth to provide a sound basis for carrying out the activities, correcting faults and ensuring that the work output is produced to the required specification.
You will understand the safety precautions required when working with sheet metal components and their associated tools and equipment. You will be required to demonstrate safe working practices throughout and will understand the responsibility 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
follow the relevant instructions, assembly drawings and any other specifications
- ensure that the specified components are available and that they are in a usable condition
- use the appropriate methods and techniques to assemble the components in their correct positions
- secure the components using the specified connectors and securing devices
check the completed assembly to ensure that all operations have been completed and the finished assembly meets the required specification
deal promptly and effectively with problems within your control and report those that cannot be solved
- complete relevant documentation in line with organisational procedures
Knowledge and Understanding
You need to know and understand:
- the specific safety precautions to be taken when working in a marine fabrication environment and when producing sheet metal assemblies (including general workshop and site safety, appropriate personal protective equipment, accident procedure; statutory regulations, risk assessment procedures and COSHH regulations, safe disposal of waste materials)
- the personal protective clothing and equipment (PPE) to be worn when carrying out the sheet metal assembly activities (such as leather gloves, eye protection, safety helmets, ear protection)
- safe working practices and procedures for producing marine sheet metal assemblies
- the correct methods of moving or lifting bulky sheet metal fabrications
- the hazards associated with marine sheet metal assembly work (such as using dangerous or badly maintained tools and equipment, lifting and handling long and heavy components, cuts, slips trips and falls) and how they can be minimised
- how to obtain the necessary drawings and joining specifications
- how to extract information from engineering drawings and related specifications (to include symbols and conventions to appropriate BS or ISO standards) in relation to work undertaken
- how to carry out currency/issue checks of the specifications you are working with
- how to interpret first and third angle drawings, imperial and metric systems of measurement, workpiece reference points and system of tolerancing
- how to interpret marking out conventions (such as cutting lines, centre lines, hole positions)
- the preparations to be carried out on the components prior to assembling them
- the various methods of securing the assembled components (such as threaded fasteners, screws, special fasteners, resistance and tack welding methods and techniques, adhesive bonding of components and self-secured joints such as knocked up, paned down, swaged and joggled)
how to set up and align the various components and the tools and equipment that are used
methods of temporarily holding the joints together to aid the assembly activities (such as clamps, rivet clamps)
- the use and care of tools and equipment and the control procedures
- the importance of using tools or equipment only for the purpose intended; the care that is required when using the tools or equipment; the proper way of preserving tools or equipment between operations
- the problems that can occur when producing sheet metal assemblies, and how these can be avoided
- inspection techniques that can be applied to check that shape (including straightness) and dimensional accuracy are to specification and within acceptable limits
- the extent of your own responsibility and whom you should report to if you have problems that you cannot resolve
Scope/range
Scope Performance
Carry out all of the following during the marine sheet metal assembly operations:
- correctly prepare and set up the components and faces to be joined
- use the correct datum faces
- use the specified or appropriate fixing method
- correctly align the components and faces to be joined
- assemble/fabricate the sheet metal components, in the correct order or manner
- produce an assembly which meets the required specification
Produce five of the following marine sheet metal assemblies:
- frames
- panels
- kit lockers
- tanks/reservoirs
- sectional trunking
- bunk spaces
- vent ducting/trunking
- toilet (head)/cubicles
- pyrotechnic lockers
- guards
- shower cubicles
- protective covers/cladding
- hoods
- galley equipment
- stowage racks
- stores
- other specific marine assembly
Use four of the following types of components in the assemblies produced:
- sheet metal covers
- flanges
- pre-fabricated square/rectangular components
- light rolled section (angle, channel or tee section)
- pre-fabricated cylindrical/conical components
- stiffeners and frame components
- brackets
Assemble sheet metal components, using two of the following methods:
- temporary tack welding
- adhesive bonding
- soldering or brazing
- flanged and mechanically fastened (bolts, screws)
- resistance spot welding
- self-securing joints (knocked up, paned down, swaged, joggled)
- riveting (hollow or solid)
- other specific method
Produce sheet metal assemblies which meet all of the following requirements:
- all components are correctly assembled and aligned, in accordance with the specification
- overall dimensions are within specification tolerances
- assemblies meet appropriate geometric tolerances (square, straight, angles free from twists)
- where appropriate, the pitches of erection holes meet specification requirements
- completed assemblies have secure and firm joints and are clean and free from burrs or flash
Complete the relevant documentation in line with organisational procedures, to include one from the following and pass it to the appropriate people:
- build records
- log cards
- job cards
- quality documentation
- other specific recording methods
Scope Knowledge
Values
Behaviours
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