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  1. moiz19670309

    Safety Class Vs Construction Class

    What will be the Nuclear Safety Class of a tool used to handle fuel bundle in Spent Fuel Bay. What will be it's Construction Class
  2. moiz19670309

    Hole size with tolerance for Shaft

    I have a shaft with size dia 260.355 A Shaft sleeve fits over the shaft with rectangular key The sleeve got damaged Now we have to manufacture a new sleeve I am confused what should be the sleeve ID with tolerance that I should give to my machinist. So that the sleeve easily fits on the shaft...
  3. moiz19670309

    SKF Bearing identification

    Dear I have a SKF bearing having this information. SKF 51134 M/DH Please explain what DH stands for. Thanks
  4. moiz19670309

    Seal Housing Jurisdiction

    As per NB-3411.1, Pump Seal Housing and Seal glands falls under the jurisdiction of ASME. Does this means Mechanical Seals have to be ASME qualified . Hence, Mechanical Seals needs to have qualifications as per ASME requirements. I am totally not clear about application of ASME on Mechanical...
  5. moiz19670309

    Mechanical Seal ASME Jurisdiction

    Please provide some information about. Is Mechanical Seal fall as pressure boundary as per ASME. Or does it's seal faces falls under the pressure boundary limit. I am unable to find explicit answer to this question. Please provide any ASME article reference to clarify.
  6. moiz19670309

    Hello everybody, Questions: 1

    Hello everybody, Questions: 1). What is the maximum tightening torque for brass bolts of M10 size ? I want to tighten brass bolts on brass earthing bar. Could you recommend a comprehensive data sheet/table for this purpose ? Thanks.
  7. moiz19670309

    Material Identification

    Ni 0.06 Cu 61.44 Zn 38.39 Nb 0.11 Please help me to identify the above material.
  8. moiz19670309

    Shaft and impeller fit

    What is the general rules for shaft and impeller fit. I have a straight shaft who's outer measured diameter is 97.4 mm. The shaft has a key 12 mm key way. At this dia a impeller fit on the shaft with this key. I don't have the hole dia of impeller. I want to make a new shaft. What dia and...
  9. moiz19670309

    Jockey Pump Pressure

    Hello' NFPA 20 requires the head at 150% flow to be atleast 65% of rated head. It also requires the head at 0% flow to be no more than 140% of rated head. Being client some one is installing Fire Protection System in our plant. We have witnessed the Pump tests. During the jockey pump test, its...
  10. moiz19670309

    Pumping / Piping Circuit

    We have a water reservoir on its roof we are planning to install two vertical turbine type pumps. Each with a flow of 160 m3/hr with ahead of 75 m. We are required to deliver at a demand point a flow from zero to 300 m3/hr with a head of 65 m. The scheme is shown in the attached picture. My...
  11. moiz19670309

    Gear material for deminarlized water

    I want to use a simple gear mechanism under water. It is an open type gear train and i want to use water as lubricant. Hence my open gear box would remain submerged in water. The water is deminaralized. I want to use some grade of steel. Can anybody help me finding a material that can work in...
  12. moiz19670309

    Pump sound

    We have a simple Centrifugal pump with 150 m3/hr flow vs 185 feet head. It has a simple 5 inch vertical suction pipe with a vertical length of 12 feet. Than a long radius elbow than horizontal 5 inch pipe 8 feet long. It then has a concentric reducer from 5 inch to 2 1/2 inch pump suction port...
  13. moiz19670309

    Reducing the length of a DWT Pump

    We have a deep well Turbine (DWT) type pump installed at our pump house. The minimum water level remains 8 feet above minimum submergence of pump. Due to high silt moving into the pump house we are thinking about reducing the length of pump in the pump house. We are planning to reduce the length...
  14. moiz19670309

    minimum pressure vessel thickness

    Does section viii limits minimum vessel thickness to 3/16 inch?
  15. moiz19670309

    Pipe Test Pressure

    In designing a dry open sprinkler deluge system what would be the test pressure of the pipe used just before the open sprinkler. Does this dry pipe which is open to atmosphere requires a pressure test?. It is a ASTM A 53 pipe. Kindly inform. Moiz Khan

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