Back

Disconnecting and removing marine mechanical equipment

URN: SEMME2035
Business Sectors (Suites): Marine Engineering Suite 2
Developed by: Enginuity
Approved on: 28 Feb 2018

Overview

This standard identifies the competences you need to disconnect and remove marine mechanical equipment, in preparation for complete overhaul or refit activities, which may be carried out in a shipyard or may involve returning the equipment to the manufacturer for overhaul. The activities will involve disconnecting and removing equipment at component or unit level, on a variety of marine mechanical assemblies and sub-assemblies, such as gearboxes, stabilisers, pumps, propeller shafts (including controllable pitch propeller (CPP) systems), steering and rudder arrangements, aircraft lifts, ballast arrangements, engines, weapons equipment, sewage treatment, reverse osmosis and low pressure steam plant, pantry and galley equipment, and other specific marine mechanical equipment.

Your responsibilities will require you to comply with organisational policy and procedures for the disconnection and removal of the marine mechanical equipment and to report any problems with the removal activities that you cannot personally resolve, or are outside your permitted authority, to the relevant people. You will be expected to work with either a high level of supervision or as a member of a team. You will take personal responsibility for your own actions and for the quality and accuracy of the work that you carry out. When working in a team, you must demonstrate a significant personal contribution to the team activities in order to satisfy the requirements of the standard and competence in all the areas required by the standard must be demonstrated.

Your underpinning knowledge will be sufficient to provide a sound basis for your work and will provide an informed approach to applying the appropriate disconnection and removal techniques and procedures. You will have an understanding of the basic knowledge behind the equipment being removed and its application and will know about the removed equipment and its release devices, in adequate depth to provide a sound basis for carrying out the activities to the required specification.

You will understand the safety precautions required when carrying out the disconnection and removal of the marine mechanical equipment, especially those for isolating and/or depressurising the equipment. You will be required to demonstrate safe working practices throughout and will understand your responsibility for taking the necessary safeguards to protect yourself and others in the workplace, both ashore and afloat.

Performance criteria

You must be able to:

  1. work safely at all times, complying with health and safety and other relevant regulations, directives and guidelines
  2. establish and where appropriate mark component for re-assembly
  3. ensure that any stored energy or substances are released safely and correctly
  4. make all isolations and disconnections to the equipment in line with approved procedures
  5. carry out the dismantling to the agreed level using correct tools and techniques
  6. store components for re-use in approved locations
  7. dispose of unwanted components and substances in accordance with approved procedures
  8. deal promptly and effectively with problems within your control and report those that cannot be solvedcomplete relevant paperwork in accordance with organisational requirements

Knowledge and Understanding

You need to know and understand:

  1. the specific safety practices and procedures that you need to observe when disconnecting and removing marine mechanical equipment (including any specific legislation, regulations/codes of practice for the activities, equipment or materials)
  2. the procedures to be carried out before starting work on the disconnection and removal (such as obtaining permits to work, obtaining and complying with risk assessments and other health and safety requirements)
  3. the health and safety requirements of the work area in which you are carrying out the activities and the responsibility they place on you
  4. the hazards associated with disconnecting and removing marine mechanical equipment and with the tools and equipment used and how these can be minimised
  5. how to recognise and deal with emergencies and the procedures to be followed (such as methods of safely evacuating and closing down compartments in the case of fire or other major incident)
  6. the protective equipment that you need to use for both personal protection (PPE) and protection of the equipment or system
  7. how to obtain and interpret information from job instructions, drawings and specifications used for the removal process
  8. the basic operating principles of the marine mechanical equipment being removed
  9. the components/units to be removed and their function within the particular marine mechanical equipment
  10. the various mechanical fasteners that will be removed and their method of release (including threaded fasteners, special securing and locking devices)
  11. the importance of using the specified release devices for the particular items being removed and why you must not substitute others
  12. why securing devices need to be correctly unlocked and labelled and the different unlocking methods that are used
  13. methods to assist with difficult-to-release items of equipment or components
  14. the quality control procedures to followed during the removal operations
  15. procedures for ensuring that you have the correct tools and equipment for the activities
  16. the techniques used to secure loose items without damage, once equipment has been removed
  17. methods of lifting, handling and supporting the components/equipment during the removal activities
  18. the removal of seals, sealant and adhesives and the precautions that need to be taken
  19. why electrical bonding is critical and why it must be removed correctly
  20. the procedure for the safe disposal of waste materials
  21. the importance of ensuring that the removal site is free from foreign object debris and that any exposed components or pipe ends are correctly covered/protected
  22. the tools and equipment used in the removal activities and their care and control procedures
  23. why tool/equipment control is critical
  24. the problems that can occur with the removal operations and how these can be overcome
  25. the recording documentation to be completed for the activities undertaken
  26. the extent of your own responsibility and whom you should report to if you have problems that you cannot resolve

Scope/range

Scope Performance

​

  1. Carry out all of the following during the disconnection and removal of the marine mechanical equipment:

    1. use the correct issue of the structure/vessel/craft installation drawings and documentation
    2. adhere to risk assessment, COSHH and other relevant safety standards
    3. ensure that you have clearance to work on the system and observe the appropriate power isolation and safety procedures
    4. maintain safe access and working arrangements for the removal area
    5. in conjunction with others, carry out the removal activities, using appropriate techniques and procedures
    6. leave the work area in a safe condition and to the prescribed category of cleanliness

  2. Take part in the disconnection and removal of three of the following types of marine mechanical equipment:

    1. propulsion gear box (single reduction, double reduction, V' orZ' drive)
    2. pump jet propulsion unit
    3. stabiliser (fixed or retractable)
    4. pump (such as salt water, fresh water, fuel oil or lubricating)
    5. propeller shaft (fixed blade or controllable pitch propeller (CPP) systems)
    6. steering gear and rudder arrangements (hydraulic or mechanical)
    7. thrusters (bow or stern)
    8. clutch and coupling (gas turbine, steam turbine, diesel or steam reciprocating engine)
    9. processing plant (such as sewage treatment, reverse osmosis, distillation or garbage compactor)
    10. liquid ballast arrangements (pump or isolating valve)
    11. engine (propulsion or power generation)
    12. compressor (high pressure or low pressure)
    13. pantry and galley equipment (such as boiling copper, oven, dish washer or garbage disposal unit)
    14. low pressure steam plant (such as auxiliary boiler, calorifier, fuel or oil heater)
    15. weapons equipment such as (gun mounting, missile mounting or weapon loading system)
    16. lifting and handling equipment (such as replenishment rig, aircraft lift, cargo hatch, windlass or capstan)
    17. other specific marine equipment

  3. Assist in carrying out eight of the following disconnection and removal methods and techniques:

    1. isolating and locking off equipment              
    2. dismantling equipment to unit/sub-assembly level
    3. bringing the system to atmospheric pressure        
    4. making safe all disconnected service supplies
    5. draining off fluids                                               
    6. supporting equipment to be removed
    7. disconnecting wires and cables                         
    8. removing mechanical fastening devices
    9. attaching suitable cables/parts identification markers
    10. proof marking/labelling of components for re-assembly
    11. securing or safely storing all peripheral units which are not part of the overhaul process
    12. protecting and preparing removed components for transportation for overhaul
    13. fitting blanks to open systems to prevent entry of contaminating debris

  4. Release six of the following types of fasteners and securing devices:

    1. studs with nuts                      
    2. bolts
    3. swing bolts                           
    4. dowels
    5. wing nuts                              
    6. flexible bellows
    7. screws                                  
    8. quick release fasteners
    9. locking devices (such as split, parallel, clevis or taper pin)
    10. keys/keyways (such as slotted, semi-circular, woodruff, taper)

  5. Disconnect and remove marine mechanical equipment, in accordance with one of the following standards or procedures:

    1. BS, EN or ISO standards and procedures
    2. customer (contractual) standards and requirements
    3. company standards and procedures
    4. specific system requirements
    5. recognised compliance agency/body's standards
    6. other accepted international standards

  6. Complete the relevant paperwork, to include one of the following, and pass it to the appropriate people:

    1. installation record
    2. job cards
    3. time sheets
    4. system log
    5. other specific recording method

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

Skills

Glossary

Links To Other NOS

External Links

Version Number

2

Indicative Review Date

01 Feb 2021

Validity

Current

Status

Original

Originating Organisation

Semta

Original URN

SEMME2035

Relevant Occupations

Engineering, Engineering and Manufacturing Technologies

SOC Code

5235

Keywords

Engineering; marine; mechanical; equipment; disconnect; remove; gearbox; stabilisers; pumps; propeller shaft