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  1. forensiclab

    Distortion of hot rolled sheet

    I have had delivered bundles of hot rolled sheet, 2-6mm, that have become quite distorted during transport. Looking at them, it seems there were insufficient bearers used to separate them, some bearers were too short, and they were placed all over the place (bearers not above each other). The...
  2. forensiclab

    Storage Thermal Latent Tanks Failure

    Hi guys, There is a total of 5 STL tanks in operation which are connected to chillers for district cooling. During the night when cooling usage is low, cool brine will be passed through the tanks to freeze up the ice balls inside to store the latent heat. During the day, the ice balls will be...
  3. forensiclab

    Storage Thermal Latent Tanks Failure

    Hi guys, There is a total of 5 STL tanks in operation which are connected to chillers for district cooling. During the night when cooling usage is low, cool brine will be passed through the tanks to freeze up the ice balls inside to store the latent heat. During the day, the ice balls will be...
  4. forensiclab

    Steam Boiler Damage

    Dear All, I have got a problem with my fire tube boiler. The boiler has three passes in which the hot gasses pass through. The first pass is where the fuel oil burner is mounted and is also referred to as the furnace chamber. This chamber has a diameter of 1254mm, length 4453mm and a plate...
  5. forensiclab

    Taping of 11kV transformer stator bar

    I have a situation where the failure of an 11kV transformer stator bar is being attributed to poor repair at a previous failure. Specifically it seems that the (repair) taping insulation was wound with a 10-20% overlay, instead of the manufacturer’s normal 50% overlay. I would appreciate any...
  6. forensiclab

    Testing corrosivity of transformer oil

    I need to adopt a test for the corrosivity of transformer oil. Standards that I am aware of are IEC 62535, ASTM D130 or DIN 51353, but I only have access to titles, not the standards themselves (without buying all three). Any recommendations on which to go with, or are they equivalent? a...
  7. forensiclab

    Weight of steel in a drilling rig

    Not sure if this is the right group to put this question, but I do not see a navel architect group. I am engaged in an exercise to evaluate some old drilling rigs and I need to approximate the total weight of steel. I am told that the correct term for what I am after is the 'lightweight'...
  8. forensiclab

    Firefighting for fuel oil tanks

    Does any API or other standard decree or recommend a fire fighting system for a diesel fuel oil tank located at a power station but remote from the main plant.
  9. forensiclab

    Fractured gate valve

    I have a fractured gate valve, with the following standards cast on the body. PN16, BS5163, DN150 There are the letters HN, which I do not understand. The fracture is shown in the attached photo. BS5163 indicates the valve can be made of grey cast iron, and we have confirmed it is made of this...
  10. forensiclab

    General Electric Frame 6

    Dear All, Just wondering if anyone could assist me on this. We have a General Electric gas turbine of model Frame 6, MS 6001B series. The turbine has been working fine since 1998 and recently underwent a major inspection at 50,000 hours. It was discovered during this inspection that there...
  11. forensiclab

    iodine/iodide etchant

    I have a situation where iodine/KI was used as an etchant, but vapours escaped and caused corrosion. However no traces of iodine can be detected on the corroded surfaces. Is this to be expected? Would iron iodide be unstable and the iodide disappear over time?
  12. forensiclab

    suggestion for casting standard

    I have an extruding machine which has fractured. It is made of grey cast iron. The fractures reveal obvious defects and the surface is very poor. Could someone suggest a standard from USA, UK or Australia that I could refer to so as to judge the condition of the casting?
  13. forensiclab

    Bubbler blocks in furnace making green glass

    I have an instance of accelerated attack in bubbler blocks in a furnace making green glass, resulting in a breakout. I have been told that this is unusual. That normally as the hole around the bubbler tubes gets deeper, the bubbler will stop working before a breakout because of the...
  14. forensiclab

    Choice of IR camera for predictive maintenance

    We wish to purchase an IR camera for predictive maintenance work, mainly electrical panels. Budget is limited and we are therefore attracted to the IR Snapshot, which appears to the cheapest (about US$14K). However its resolution (120x120)appears to be less than others. Has anyone found this...
  15. forensiclab

    Fine cracks in one bank of V12 cylinder head

    We have fine cracks occurring in one bank only of a V12 cylinder head. Engine has run 7640hr. After engine failed to start, water was detected in every cylinder of one bank, causing a lock. Subsequent investigation revealed fine cracks in that bank. Cylinder sleeves exhibit equal wear, bank...
  16. forensiclab

    Chlorophyll vs Spirulina

    I have about thirty 25-kg containers full of green powder, said to be either chlorophyll or spirulina. Is there a quick test I can perform on each container that will tell me whether it is one or the other.

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