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  • Users: Truckdriver2
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  1. Truckdriver2

    Boiler Door

    rmw, The door is the drum door. It comes under the Classification Societies rules. I am still having trouble determining what the correct pre-heat and post-heat treatments for carbon steel of this type should be. The boiler was built under Design Code: BS2790-1982. The material specification...
  2. Truckdriver2

    Boiler Door

    Thanks all for your replies The door is being sent for mag particle or X-Ray testing and the purported procedure is being checked as appropriate for the material in question. TD.
  3. Truckdriver2

    Boiler Door

    Thanks for your response Metengr, I am currently off site but am getting the steel details tomorrow. Welding on pressure vessels of this size by "cowboys" is always of concern as the consequences of failure are extreme. I do not think that the weld process used 'should' cause any concerns...
  4. Truckdriver2

    Boiler Door

    A contractor recently took it upon himself to do a weld repair to a boiler door. He decided he knew what he was doing and did the following: 1) Pre heat to 150 Deg C 2) Tig weld 3) Post heat to 300 Deg C and leave with thermal blanket over night. The door was reportedly 30 Deg C in the...
  5. Truckdriver2

    Fuel Pumping

    If I wanted to pump fuel ashore from a supply boat at 10 Bar through a lay flat hose; what standards would I have to comply to?
  6. Truckdriver2

    Fuel Pumping

    If I wanted to pump fuel at 10 Bar ashore off a supply boat through a layflat hose; what standards would I have to comply to?
  7. Truckdriver2

    Noisy Fan

    It was required to replace a previously centrifugal engineroom supply fan with an axial flow fan. The new fan may be oversized to some extent. The headroom over the fan is poor. The fire damper therefore strikes an angle of about 45 degrees to the fan intake. Also the inlet vent is angled at 45...
  8. Truckdriver2

    Engineroom Fan

    It was required to replace a previously centrifugal engineroom supply fan with an axial flow fan. The new fan may be oversized to some extent. The headroom over the fan is poor. The damper therefore strikes an angle of about 45 degrees to the fan intake. Also the inlet vent is angled at 45...
  9. Truckdriver2

    Bunker Tank Calibrations

    It's rarley that big a data entry task. You will find large slabs of the data linear and you can usually pick the changes in gradient fairly easy off the table. From there it's basic to generate the whole table except for rounded and flared sections. It's not that it's overly hard to generate...
  10. Truckdriver2

    Bunker Tank Calibrations

    Xcell...
  11. Truckdriver2

    Boiler feed water pH to Boiler water pH

    Perhaps the most important piece of information lacking here is what type and pressure boiler are you running? For 7 Bar firetube boilers the values you are experiencing are quite normal and within the "normal" range. The feedwater Ph is lower as the treatment chemical stays in the drum as it...
  12. Truckdriver2

    Discuss Isentropic, Isothermal, Polytropic Process

    The area under the curves is equivalent to the work done. In the cooled machines there is less area under the curves - hence less work for the same effect.
  13. Truckdriver2

    submarine cable

    The depth of water and the kind of bottom are critical for laying. Variable bottoms may be very expensive.
  14. Truckdriver2

    Low sulfur diesel

    LSD can have lubricity issues. These tend to manifest themselves in fuel pumps with increased wear and sometimes seizure.
  15. Truckdriver2

    Define Mechanical and Volumetric Clearance

    1)Shave the head. 2)Increased compression ratio. Results...For a compressor an increased mechanical strain over designed specification. For a diesel, possibly the same / possibly not depending on the control system but more immediately an adjustment of injection timing would be required.
  16. Truckdriver2

    Oil levels

    The person who put the marks on the dipstick generally has vastly more knowledge than the chief or super wishing to cut oil consumption. In my experience it is true that oil consumption is less when running at lower levels. There is an interesting paper on the economics of this practice that I...
  17. Truckdriver2

    Bunker Inlet manifold layout

    JMW, The manifolds may be more than a hundred meters from one another. If you are looking mostly at tankers, things will generally be a bit simpler with a manifold either side somewhere about midships. Depending on size, bulk carriers may be similar or have a similar set up aft in front of...
  18. Truckdriver2

    Bunker Inlet manifold layout

    The ship has tanks extending its length, generally Port and Stbd, sometimes centre tanks as well. These will generally be called 1P, 1S, 2P, 2S etc. Sometimes your bunker tanks can also double as cargo tanks. There will be a filling line or sometimes filling lines specific to product on your...
  19. Truckdriver2

    Bunker Inlet manifold layout

    No...
  20. Truckdriver2

    Cu Corrosion ASTM D130

    G'Day All, I am after information on the Cu Corrosion test ASTM D130 with regard to trying to corelate some fuel standards. There seems to be precious little on the net that actually describes the test (in detail) and interpretation of the results. I will be able to get a hold of copy of the...

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