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  1. MaintEngnr

    Estimating Cost of Sand Casting a Pump Casing

    Thanks for the input. I'll figure something out!
  2. MaintEngnr

    Estimating Cost of Sand Casting a Pump Casing

    I appreciate the input, unfortunately not a viable option for us. Back to the main question, which is regarding estimating the cost of the casting and the availability of resources to help get me develop a reasonable estimate.
  3. MaintEngnr

    Estimating Cost of Sand Casting a Pump Casing

    We have two of these pumps in operation. We have a spare rotating assembly (shaft, impellers, etc.) that we keep in storage and use each time we rebuild one of our pumps to cut down on down time. The rotating assembly removed from the pump being rebuilt is then refurbished and put into storage...
  4. MaintEngnr

    Estimating Cost of Sand Casting a Pump Casing

    In the land of government contracting we are required to perform an independent cost estimate to compare to the customers quote. This becomes extremely difficult when it has to be done for a proprietary piece of equipment. In this case I have to develop an estimate for a 14 stage centrifugal...
  5. MaintEngnr

    Reading Variable Pipe Hanger Load

    At the small test facility where I work, we perform a 5 year maintenance task of inspecting our pipe hangers and adjusting the variable spring hangers as necessary. The problem is that the instructions for performing the adjustments do not mention whether you read the load from the top or the...
  6. MaintEngnr

    Will a digital HART controller rated at 9V at 4-20mA work on a 24 VDC control circuit?

    Thanks for the input. I went back and carefully reread the manual and it says that the DVP is designed for use with all control systems and that it can withstand up to 30 V from a current source. Also I confirmed that 9V is the compliance voltage. Being such a small facility, it is hard to...
  7. MaintEngnr

    Will a digital HART controller rated at 9V at 4-20mA work on a 24 VDC control circuit?

    I support a small test facility and we have purchased some Masoneilan control valves to replace some really old control valves. We decided to upgrade from pneumatic valve positioners to digital valve positioners. While looking through the manual another engineer found that the Masoneilan SVI...
  8. MaintEngnr

    Section I Power Boilers - PG-58.2 BEP Connections to Boilers

    I can understand that in general for BEP, but it seems that ASME Section I has jurisdiction in this case, since it is BEP connecting to BP. ASME Section I doesn't seem to allow for nonstandard fittings in this application, based on the use of "shall be" in PG-58.2.
  9. MaintEngnr

    Section I Power Boilers - PG-58.2 BEP Connections to Boilers

    PG-58.2 states that all BEP connected to a boiler for any purpose shall be attached to one of the types of joints listed in PG-59.1.1.1 (A tapped opening), PG-59.1.1.2 (Bolted flanged joints including those of the Van Stone type), and PG-59.1.1.3 (Welded ends of the butt or socket welding type...
  10. MaintEngnr

    B31.1 or B31.9 jurisdiction

    B31.9 Building Services Piping says that (paragraph 900.1.2) steam and condensate piping with pressure not exceeding 150 psig and 366 degrees Fahrenheit is within its scope. B31.1 Power Piping says that (paragraph 100.1.3) only building heating and distribution steam and condensate piping...
  11. MaintEngnr

    Piping Vibration Dampers

    Yes, they are old. They were installed when the facility was constructed around 1962-63. Unfortunately I am unable to post pictures, but the link rconner provided gives a good look at the spring mechanism. I am hoping to find any technical information that might still exist out there (e.g...
  12. MaintEngnr

    Piping Vibration Dampers

    My company operates a small steam/water test loop. We have two locations in our piping system with Blaw Knox vibration dampers. The nameplate indicates Size 8, Type 2A, Patent# 2,215,238. Does anyone have the rating information on these or know how we might obtain it?
  13. MaintEngnr

    Flow Coefficient for 2 different valves installed in parallel flow paths

    The reason for this exercise is that I know the pressure downstream of the valves in parallel and I was trying to estimate the pressure upstream of the valves in parallel using the dP formula. We are looking to install a check valve upstream of these valves in parallel and I was needing a...
  14. MaintEngnr

    Flow Coefficient for 2 different valves installed in parallel flow paths

    The flow coefficient can be used to calculate the predicted pressure drop across a valve. How do you predict the pressure drop if you have two valves in parallel that are both open but the valves have different flow coefficients?
  15. MaintEngnr

    Code jurisdictions

    I was looking at B31.3 for comparison and confirmation of my interpretation of VIII D1. Based on the agreed upon interpretation of VIII D1 above, if the attached piping was process piping it would fall under B31.3 jurisdiction, like it does for B31.1, but the exception clause (300.1.3) appears...
  16. MaintEngnr

    Code jurisdictions

    I have steam piping that discharges to a pressure vessel. After reviewing BPVC VIII D1 and B31.1, it is not entirely clear to me if the weld at the "first circumferential joint" is in VIII D1 or B31.1 jurisdiction. ASME VIII Div 1 Clause U-1(e) U-1(e) In relation to the geometry of pressure...

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