Search found 28 matches
- Tue Jan 09, 2024 2:04 am
- Forum: The Workshop
- Topic: Post purge sequence on Boiler after emergency trip
- Replies: 2
- Views: 2123
Post purge sequence on Boiler after emergency trip
When looking through the cause and effect charts for a new steam boiler installation, I was surprised to find that there was no "post purge" time after an emergency shut down or abnormal trip of the boiler. For a normal shut down of the oil or the gas burners, the combustion air fans would...
- Sat Apr 18, 2020 6:04 am
- Forum: The Workshop
- Topic: Jack up Rig ballast and fire pump
- Replies: 1
- Views: 4439
Jack up Rig ballast and fire pump
Good Day, If anyone has an experience on Jack up rigs I hope they can answer this question. A jack up rig sometimes has the hull in the water and sometimes out of the water , at varying air drafts too. But regardless of what position the hull is in it has to have fire water , cooling water and , I t...
- Sat Apr 18, 2020 5:33 am
- Forum: The Workshop
- Topic: Finnøy Gear pressure
- Replies: 1
- Views: 4790
Re: Finnøy Gear pressure
Hi Mike, not familiar with that Finnoy gear set up, Is the oil pump driven off the gear box and therefore the faster the RPM , that faster the pumps spins? or is it a separate electric driven pump? But I would say no, the clutch pressure should not drop at all under load , providing the oil temp doe...
- Sat Apr 18, 2020 5:16 am
- Forum: The Workshop
- Topic: Diesel Generator low frequency on high load.
- Replies: 14
- Views: 29367
Re: Diesel Generator low frequency on high load.
Hey Sabih, Well there a a number of things it could be - insufficient fuel or insufficient air or perhaps injection timing is out. 350 kw is just over half the rated power, so you have some major issue there. Could possibly be something to do with the fuel pumps you overhauled- did you spill time th...
- Wed Mar 25, 2020 4:13 am
- Forum: The Workshop
- Topic: bolt materials for Korean and chinese shipbuilding
- Replies: 2
- Views: 4736
Re: bolt materials for Korean and chinese shipbuilding
Dont think so.- Korean and Chinese yards build over 75% of the worlds shipping by tonnage. So they must be doing something right.
- Tue Mar 24, 2020 10:30 pm
- Forum: The Workshop
- Topic: bolt materials for Korean and chinese shipbuilding
- Replies: 2
- Views: 4736
bolt materials for Korean and chinese shipbuilding
Hi, does any one know what the bog standard bolt material or spec is used in Korean , and Chinese shipyards for engine room and pump room piping. All my quick books and cheat sheets seem to indicate ATSM A193 B7 bolts - But they are all geared to The "petroleum industry" . Currently workin...
- Tue Oct 09, 2018 6:09 pm
- Forum: The Workshop
- Topic: Load line regs
- Replies: 2
- Views: 3694
Load line regs
Hi , hoping someone has had this issue before. We are replacing the overboard discharge butterfly valve for a fresh water generator in drydock , but the class surveyor is telling us that it has to be a non return valve as per load line regs. I think he is wrong. The system was fitted from new buildi...
- Wed Oct 05, 2016 6:59 pm
- Forum: The Workshop
- Topic: Welding on crane boom
- Replies: 61
- Views: 32961
Re: Welding on crane boom
From what I know - cranes are "optional" to be classed according to the class societies. Some offshore units that have hull and (some ) machinery classed by an IACS society choose to have their offshore cranes surveyed and inspected by a third party that specialises in cranes or by the mak...
- Wed Oct 05, 2016 6:52 pm
- Forum: The Workshop
- Topic: Measuring rudder pintle bearing clearances
- Replies: 1
- Views: 9255
Measuring rudder pintle bearing clearances
Has anyone done this job in dry dock? We have a two pintle semi balanced rudder- I am working on some docking specs. Is it generally considered acceptable to bend/squeeze the feeler gauges in through the limited gap between the rudder and the lower rudder horn (lower pintle) and between the rudder h...
- Wed Aug 12, 2015 3:05 am
- Forum: The Workshop
- Topic: Plate cooler
- Replies: 31
- Views: 21472
Re: Plate cooler
Yes have done it on Ulstein built PSV with similar cooling set up as you described , vessel had been operating North sea for many years. It went to a contract in India before it came my way and apparently they had had some problems there because they ordered extra plates but never got around to inst...
- Mon Jul 06, 2015 2:32 am
- Forum: The Workshop
- Topic: Dessicant type air dryers
- Replies: 7
- Views: 4955
Re: Dessicant type air dryers
Ahhh- that makes sense!
- Sat Jun 27, 2015 1:38 am
- Forum: The Workshop
- Topic: Marine Engineering - Practical Tips & Tricks
- Replies: 62
- Views: 107343
Re: Tips & Tricks
A few more tips and tricks... When trying to remove old valve seats from med, speed engines, if they are stuck and you cant get them out with the regular tools try running a small bead of weld on them and then throwing water on , the expansion and contraction can "crack " the bonding betwe...
- Sat Jun 27, 2015 1:25 am
- Forum: The Workshop
- Topic: Dessicant type air dryers
- Replies: 7
- Views: 4955
Dessicant type air dryers
Has any one sailed with control air dryers of the dessicant type. There are two "towers" or vessels filled with dessicant, while one is on line , the other is regenerating. The on line vessel has the control air passing through it usually from the receiver to the users. The air has to flow...
- Thu Oct 23, 2014 8:05 pm
- Forum: The Workshop
- Topic: tail shaft alignment
- Replies: 6
- Views: 6840
Re: tail shaft alignment
I actually was an ABS surveyor for a few years. In my part of the world there wasn't any big drydocks or shipbuilding facilities so as far as tailshaft work went I was mainly dealing with tugs , workboats and motor yachts. One thing that often surprised me was that we went to such lengths to align e...
- Fri Oct 17, 2014 5:36 pm
- Forum: The Workshop
- Topic: tail shaft alignment
- Replies: 6
- Views: 6840
Re: tail shaft alignment
Thanks Rum Baron and JK- I have seen figures for alignment ofsets to take in to account thermal growth but I also dont recall ever seeing any for hydro dynamic lift. Re the screw in probes- can you recall the magnitude of the lift that was being recorded? Also does anyone know any rule of thumb figu...