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Recent content by VoDich

  1. VoDich

    Certificate of Compliance or MTR

    Thank you for clarifying Shane. Very helpful!
  2. VoDich

    Certificate of Compliance or MTR

    Haha 1503-44, I remember that song. My OCD will kick in and will drive me nuts. I'm not too concern about this one as much. It's more for my understanding and hopefully will help me write a better specification when I have to deal with steam piping. Thank you Shane and mk3223. I'll check if...
  3. VoDich

    Certificate of Compliance or MTR

    I appreciate everyone for all the very helpful comments. In my case, the project was bid out and awarded to the lowest bidder. With my department, we are not allow to sole source. The clients we work for understand this as well. They can tell us the type of pipe (copper, steel, plastic, etc.)...
  4. VoDich

    Certificate of Compliance or MTR

    1503-44: As a mechanical engineer on the project, I don't have control of which pipe supplier to use. My projects go out for general contractors to bid on. I'm at the mercy of the general contractor on who they want to use as their pipe supplier. So is it common to ask for an MTR regardless...
  5. VoDich

    Certificate of Compliance or MTR

    MJCronin: No, the system is not certified to ASME B31.1 or B31.3. For above ground natural gas piping in the building, the contractor submits a couple of letters from his distributor stating that they consolidate the delivery of products from many manufacturers to reduce the overall cost...
  6. VoDich

    Certificate of Compliance or MTR

    Do you guys typically request certificates of compliance (COC) or mill test reports (MTR) from the vendor to confirm that the pipes they want to use meet ASTM standards? Per specifications, the pipes need to meet ASTM A53/A53M for steel, and ASTM B88 for copper. These pipes will be used for...
  7. VoDich

    Boiler fuel oil return requirements

    Thanks for the input TBP. Per the boiler installation manual, a two-pipe (supply and return) oil system is recommended. It's recommended. In my case, I don't want to have to do a change order to add a return piping if it's not required.
  8. VoDich

    Boiler fuel oil return requirements

    I'm replacing a couple of 500 HP steam boilers that provide heating and domestic hot water for a campus in California. Main fuel is natural gas. Backup fuel is fuel oil #2 (diesel). I believe these boilers were installed in the late 80's. There is a large diesel storage tank with diesel...
  9. VoDich

    Pipe insulation and jacket in very humid environment

    Thank you for all the suggestions. nuuvox000: Thanks. The subcontractor might be trying to substitute stainless steel with the cheaper aluminum. gerhardl: I wanted jacket as a layer of protection so the insulation won't get deteriorated as fast.
  10. VoDich

    Pipe insulation and jacket in very humid environment

    I am looking to put insulation and jacket on chilled water piping (2 to 6 inches diameter), ductwork (30" diameter), and equipment (pumps, air handlers) located outdoors near coastal environment of Hawaii. I need help with selecting the right materials. My main goal are effectiveness and...
  11. VoDich

    sprinkler system water demand

    stookeyfpe: Actually, I just wanted to know the building's sprinkler demand. I may have used the wrong terminology that got confused with site fire flow. It is a very informative thread however. Did Travis get his steak at the steak house? pipesnpumps: Thanks for the tips, I'll try your...
  12. VoDich

    sprinkler system water demand

    Thanks Travis. That makes a little more sense with your bunch of small offices vs wide open space example regarding the flow rate. So what do you tell your civil engineer when they ask you what your building's fire water flow rate is during the design? We don't have a FPE to run the cals...
  13. VoDich

    sprinkler system water demand

    Travis: So if the FPE knows that the city is only capable of supplying say 250gpm at 40 psig at the fire riser. Wouldn't it make sense to design a sprinkler system to use a maximum of 250 gpm? Why would you design a system for a much higher flow rate that would require a fire pump? From what...
  14. VoDich

    sprinkler system water demand

    How does a FPE calculate the fire water demand for a building? For example, a Light Hazard building with 3200 s.f. Using a wet-pipe system and Density/Area Curves in NFPA 13, I'm coming up with 150 gpm (0.10*1500) as a minimum water demand for this building. Assuming hose streams are not...
  15. VoDich

    Interview help for HVAC engineering position

    I understand that your interview is for an entry level HVAC engineering position. A few years ago, we were looking for the same thing, but decided that we would hire a young engineer with some knowledge of HVAC over someone that doesn't know anything about HVAC. So we threw in a few basic HVAC...
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