A Guide to Ship Repair Estimates in Man Hours by Butler, Don (Auth.)

By Butler, Don (Auth.)

Expert send surveyor Don Butler stocks a lifetime's send fix costing adventure during this precise source for exact fee estimation and planning

  • Includes demanding to come back via details on general send fix exertions expectancies for actual man-hour forecasting and price estimation
  • Produced for marine engineers and marine execs to assist with fix specification and negotiation, assisting you to devise paintings and budgets extra reliably
  • Uses man-hours in place of specific premiums or currencies, delivering a long term version for pricing despite position, fee fluctuation or inflation

Bringing jointly differently scattered info on particular fix and dry-docking actions, this beneficial consultant will prevent time and increase the accuracy of your send fix estimates. do not plan or fee paintings with no it!

Don Butler is a fellow of the Institute of Marine Engineers and a member of Society of Consulting Marine Engineers and send Surveyors, UK.

  • Made up of very demanding to come back via info on regular send fix hard work expectancies for exact man-hour forecasting and price estimation
  • Produced for marine engineers and marine pros to save lots of time, reduction in fix negotiation and support businesses to devise extra reliably
  • Man-hour listings help in long term pricing, that means the booklet content material is still legitimate despite foreign money, expense fluctuation or inflation

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Removing internal floor plates, or grating, cleaning, painting, and refitting. Small vessels Cable dia. (mm) Man-hours (per side) <25 25–50 75 90 Large cargo vessels and oil tankers DWT Man-hours (per side) <20,000 20,000–50,000 50,000–100,000 100,000–200,000 200,000–300,000 Over 300,000 100 130 140 200 250 270 Note: Removal of sludge will be charged extra per m3. 36 Guide to Ship Repair Estimates Staging This item is usually charged within a particular job. When included within the charge of a job, that job price is increased accordingly.

5 17 18 19 20 22 24 25 27 30 Notes: Valves in pump rooms, additional 15%. Valve in cofferdams and inside tanks, additional 20%. Removals for access not included. Staging for access not included. Removing valve ashore to workshop for above type of overhaul requires special consideration, dependent upon size. Valves below 20 kg in weight can be assessed as double the in-situ rate. Above this requires rigging and cranage input, which should be assessed separately. 13 Ship side storm valves Opening up ship side storm valve for in-situ overhaul, by disconnecting and removing cover, spindle and gland, cleaning all exposed parts, testing bedding, painting internal exposed areas and reassembling with new cover joint and repacking external gland with conventional soft packing.

From the above tables and results, it will be seen that approximately three to four times the weight of zinc anodes are required, to that of aluminum, for the same protection. It is for this reason that, in larger vessels, aluminum is used in preference to zinc. Of course, aluminum is much more expensive than zinc. 11 Sea chests and strainers Opening up of sea chests by removing ship side strainers, cleaning, and painting with owner’s paints, as per hull treatment specification. Assuming single grid per chest.

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