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by Big Pete
Wed Nov 21, 2018 12:51 pm
Forum: The Workshop
Topic: Premature pipe failure
Replies: 3
Views: 107

Re: Premature pipe failure

I suspect that the impressed Current system is either not working correctly or is set up wrongly. Go back to the Instruction Manual and see if there are set of settings for the "as installed" condition" and see if they are still the same. It looks as if there is too much current flowi...
by Big Pete
Wed Nov 21, 2018 12:48 pm
Forum: The Workshop
Topic: Black deposits on fresh water side plate coolers
Replies: 1
Views: 71

Re: Black deposits on fresh water side plate coolers

Poor cooling water treatment. The pipe work is rusting to form Black Iron Oxide (due to lack of Oxygen) which is dissolving in the circulating water and being deposited by Galvanic action onto the Heat Exchanger Plates which are less re active than the steel pipes.# Same as the steel Hull corrodes, ...
by Big Pete
Sun Nov 18, 2018 1:30 pm
Forum: The Workshop
Topic: Stern tube
Replies: 2
Views: 178

Re: Stern tube

There should be a Hydrostatic pressure balance between the water outside and the oil inside, because Sea Water is more dense than oil the stern tube header tank is always higher then the Sea Water outside, in proportion to the different SGs. Has the Draught aft increased ? That might cause Sea water...
by Big Pete
Tue Oct 23, 2018 9:29 am
Forum: Crew Mess
Topic: working in the UK
Replies: 2
Views: 250

Re: working in the UK

There used to be a lot of Canadians working in the North Sea employed by British Companies on British Ships, through British Agencies, the North Sea is picking up again so may be worth having a try. They will pay your Air Fares for each trip.
by Big Pete
Wed Oct 10, 2018 11:35 pm
Forum: The Workshop
Topic: Load line regs
Replies: 2
Views: 216

Re: Load line regs

All valves connected to the ships shell or side plating have to be spheroidal Graphitic cast iron or cast steel, if they fracture and break off the ship will sink! Similarly if the pipe between your Fresh Water Generator and the overboard valve rusts through- Hot concentrated Salt Water so very like...
by Big Pete
Fri Sep 21, 2018 10:40 am
Forum: The Workshop
Topic: OSD18
Replies: 1
Views: 229

Re: OSD18

The size of the Gravity Disc is chosen according to the specific Gravity of the oil to be purified at the temperature at which the oil will be purified.
by Big Pete
Fri Sep 21, 2018 8:48 am
Forum: The Workshop
Topic: Cooking oil used on shipping run
Replies: 2
Views: 210

Re: Cooking oil used on shipping run

by Big Pete
Tue Sep 18, 2018 11:37 pm
Forum: The Workshop
Topic: Cooking oil used on shipping run
Replies: 2
Views: 210

Re: Cooking oil used on shipping run

Interesting 22,00 litres for a voyage, looks to be a small feeder container ship, maybe 1590 NRT, 3,000 DWT, about 3,000 kW. Doesn't say what the length of voyage is, or if the fuel was used for everything or just the auxiliaries. They burnt 22,000 litres of Bio Fuel, maybe 19 tonnes in total and &q...
by Big Pete
Wed Aug 29, 2018 8:58 am
Forum: Crew Mess
Topic: New engine
Replies: 392
Views: 118152

Re: New engine

Lots of ways to use the waste heat, boiler in the exhaust stack, use the engine cooling water and trubo charger air coolers to preheat the feed water and generate steam to drive a steam turbine and either generate electricity or mechanically feed the power back into the shaft. Turbo chargers are so ...
by Big Pete
Mon Aug 27, 2018 12:31 am
Forum: Crew Mess
Topic: "Nanotechnology can cure shipping's sulphur conundrum"
Replies: 3
Views: 269

Re: "Nanotechnology can cure shipping's sulphur conundrum"

This sounds like a fantastic idea if true. I imagine that there would be considerable economies of scale, and because installing the plant on the ship has a capital cost, maintenance cost and causes loss of earnings due to the volume and weight taken for the plant, and also will require Man hours to...
by Big Pete
Mon Aug 20, 2018 10:22 am
Forum: Crew Mess
Topic: Weld defects in new build for CCG
Replies: 5
Views: 442

Re: Weld defects in new build for CCG

As I understood the original article, it was fully automated Robot Welding, so it should have followed the programmed procedures exactly, so what caused the problem?? Excessive welding current set on machines? Wrong choice of welding wires? or poor quality plate/ filler rods? Did they increase the w...
by Big Pete
Fri Aug 10, 2018 11:54 am
Forum: Crew Mess
Topic: Solar Powered Ship
Replies: 4
Views: 2511

Re: Solar Powered Ship

There is very little known about it, Mainly because nobody has built a ship that is entirely solar powered! Some have Photo Voltaic Panels all over the superstructure linked to storage batteries that will keep the lights on for a few hours in Port, but nothing that I have heard of that will power pr...
by Big Pete
Wed Aug 08, 2018 1:16 pm
Forum: Crew Mess
Topic: $30 million oops
Replies: 10
Views: 776

Re: $30 million oops

No Urinals, maybe the USN is planning for an all Female Crew?

BP
by Big Pete
Fri Aug 03, 2018 3:31 am
Forum: The Workshop
Topic: MEDIUM SPEED ENGINE LUB OIL
Replies: 5
Views: 827

Re: MEDIUM SPEED ENGINE LUB OIL

"General Average" It is the Fundamental Rule of Marine Law & Insurance that the Ships Master can sell or use any part of the Cargo or even the ship itself in if it is in the best interests of the shipowner and cargo owners, the cost is then shared between all the parties involved in th...
by Big Pete
Tue Jul 31, 2018 11:57 pm
Forum: Crew Mess
Topic: How to Learn to be a Good Junior Engineer
Replies: 6
Views: 452

Re: How to Learn to be a Good Junior Engineer

" I have three friends, I call them who and what and when, they taught me all I know".... Rudyard Kipling. " I have three friends, I call them what and how and why, they taught me all I know"....... Big Pete. If you are asking HOW to become a good engine you most probably WILL be...

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