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  • Users: MaintEngnr
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  1. 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...
  2. 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...
  3. 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...
  4. 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...
  5. 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...
  6. 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?
  7. 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?
  8. 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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