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  1. AEF

    specification for 1 up to max 3 threads - windings above the nut

    For taper threads look in ASME B1.20.1 Part 3.1.7 and Table 2
  2. AEF

    Methanol and aluminum

    If you have chlorides present, methanol will cause rapid corrosion of aluminum; aluminum methylene chloride. Formic acid corrosion (from methanol) is also a problem.
  3. AEF

    AERIAL LIFTS

    Have you considered aluminum manbaskets with floatation devices? This would solve the manbasket sinking issue, but if your crane boom goes with it.... I also agree with Allangator's comment that hitting the water from height can be like hitting concrete and drowning may be your secondary...
  4. AEF

    Demineralized Water Piping

    The ASME standards that were refered to are only for materials for piping fabrication (ASME Section 2 Parts A-D). I'm not aware of any ASME standard that references boiler feed water quality. ASME Sections 6 and 7 are rules and guidelines for the care and operation of heating and power boilers...
  5. AEF

    Demineralized Water Piping

    Again, thanks for all the responses. Stanier (Mechanical), you mentioned an Australian Standard for ABS, AS 3518, noting that it's used in preference to US Standards for ultra pure water service. Which US standards? ASTM? We operate a isoocatane petro-chemical refinery in Alberta, Canada, and...
  6. AEF

    Demineralized Water Piping

    Thanks for all the replies. Your info has been very helpful. I would like to re-state one of the questions though; Is demin water piping made of stainless (or other corrosion resistant material) because of the corrosiveness of the water or for process reasons? Is there an engineering or...
  7. AEF

    Static Equipment Inspection Costs

    Depends where you are and what the labour/services costs are in your markets. There is a company that specilaizes in Shutdown/Turnaround planning, scheduling, and cost control that we use that has a very good data base for these functions. We have found using them that we can consistently...
  8. AEF

    Suitable Material for 50% Sodium Hydroxide

    Contact the tech. services department at Haynes International. I've used them in the past to solve problems on a caustic eductor that was made of B2 alloy and was failing every 6 months (changed it to C2000; no failures in last 4 years). They offer this service for free and respond quite...
  9. AEF

    metallurgy in power generation industries

    For North America, I recommend API 510 as you base document for pressure vessels and API 570 for pressure piping. The API also has some very good Recommended Practices for inspection; RP-572 Inspection of Pressure Vessels; RP-573 Inspection of Fired Boilers and Heaters, RP-574 Inspection...
  10. AEF

    Identify Metals

    A lot of good responses. The difference between cast iron and steel is the carbon content. Iron with a carbon content between 2-6.67% is cast iron, less than 2% and it's steel. Hardness testing is one way to try and sort the materials but it would have to be a Brinell test and your availability...
  11. AEF

    metallurgy in power generation industries

    Check out the Nickel Development Institute. They have a very good series of designer handbooks as well as general reference books on materials in petroleum refining. API also has some very good resource materials.
  12. AEF

    torque tightening procedure

    Probably the best practical and most comprehensive reference is a book by John H. Bickford titled 'An Introduction To The Design And Behavior Of Bolted Joints', ISBN Number 0-8247-9297-1.
  13. AEF

    ASME B31 Allowable Stresses

    A350 is a forging spec. If your fabricating a standard forged fitting go to the applicable spec., such as B16.5 and determine the working pressure by the class (A350 LF6 Cl.2 is listed as a group 1.2 material in B16.5). If your using the material for some other aplication, go to B31.3 Chapter...
  14. AEF

    Feeding Condensate in to Boiler

    MJCronin nailed it right on the head. One other point I'd like to add to his list is safety. A scaled or fouled superheater or drum safety valve is every steam engineers nightmare.
  15. AEF

    ASME B31.3 Para. 345.2.3(c) Closure Welds

    According to B31.3 Para. 345.2.3(c) for closure welds, this may be done as long as all components have been leak tested successfully, undergo in-process examination as per Para. 344.7, and pass either 100% RT or 100% UT examination. This becomes a problem when the final closure weld is a...
  16. AEF

    Cold Box inspection

    API will give you guidance on this, also check with your local jurisdiction to see if they have any special requirements for cold boxes. Normally you would only inspect the equipment inside a cold box if you open it for maintenance or repair (as evidenced from frost on the outside or LEL's from...
  17. AEF

    Surface deterioration of mild steel in a Muffler

    I agree with rustbuster1. Analyze your scale. Caution on some X-ray diffraction analysis though, some are only qualitative and not quantitative. You may want to do some metallography on the tube also.
  18. AEF

    Deaerator

    Welcome to code land. Sorry, the DA vessel is a pressure vessel. Most jurisdictions are quite anal retentive about DA's as the older ones (not stress relieved) use to come unzipped and create mayhem on a regular basis. Check with your local regualtory authority to see if an R stamp holder is...
  19. AEF

    Surface deterioration of mild steel in a Muffler

    Potentially a whole raft of problems. Excess carbon indicates a rich mixture with high amounts of unburned hydrocarbons or CO. Any sulfur in your fuel? Water content downstream of the cat converter? Any one of these combinations along with high temperatures can cause scaling on carbon steel...
  20. AEF

    UT probes for structural steel

    The questions I'd ask are; was the technician ASNT (or other) certified, does the company they worked for have qualified procedures, and were they following them? If the answer is no to any of the above, I'd question their results and have them do a performance test on test plates to prove their...

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