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Recent content by Cronos_2P

  1. Cronos_2P

    Buried pipe in fire protection system

    The question arises because in an article on the internet I read that in fire systems it is recommended that the return line to the tank of a PSV in a fire system go aerial and I wanted to know if this recommendation is in the standard or manual. In the case of the flow meter, although NFPA 24...
  2. Cronos_2P

    Buried pipe in fire protection system

    Hello everyone. My question is the following: There is a problem if, due to space issues in the pump room, the relief valve discharge pipe and the flow meter outlet pipe in a fire system are buried until they reach the water tank again as shown in the figure? The tank is located at a distance...
  3. Cronos_2P

    Inertial loads

    Thank you both for the help. electricpete, what you assume is correct, the pump is similar as show in the link. As for the inertial loads, it is as you mentioned, these are a function of the equivalent reciprocating mass, ratio of crank radius an connecting rod length, the crank rotation...
  4. Cronos_2P

    Inertial loads

    Thank you very much for the help Greg Locock. The data I have about the reciprocating pump are: - Number of heads: 3 - Bore: 4.5 (in) - Stroke: 6 (in) - Rod Length: 16 (in) - Minimum pump speed: 150 (rpm) - Nominal pump speed: 240 (rpm) In your explanation, why are the dominant frequencies...
  5. Cronos_2P

    Inertial loads

    Hello everyone. I have the natural frequencies of the piping system of a reciprocating pumping unit, I need to verify the separation margin indicated in Annex C of the API 674 standard. If I have a triplex pump that rotates at 300 rpm, the significant frequency would be f=3*300/60=15 (Hz) as...
  6. Cronos_2P

    PSV Reaction Forces

    Hello everyone Looking at this figure, I have the following questions: 1. Is the piping arrangement shown in the picture correct? the connection to the secondary head should not be at 45 °?. 2. In this type of system of closed discharge PSV, should the reaction force be included? 3. In open...
  7. Cronos_2P

    Pipe Material Selection

    Sorry, I forgot to mention the following information: The inlet line (NPS 10") comes from a preheating exchanger and is approximately 55 m long. The outlet line (NPS 16") goes to an atmospheric distillation column and is approximately 65 m long.
  8. Cronos_2P

    Pipe Material Selection

    Hi to all, What type of material should be used for the inlet and transfer pipes of crude oil to cylindrical furnace if the operating conditions are as follows: • Inlet Line: Max. Pressure: 220 Psi, Max. Temperature: 360 °F. • Transfer Line: Max. Pressure: 60 Psi, Max. Temperature: 600 °F. It...
  9. Cronos_2P

    Error Isogen of Cadworx

    Thank you very much for the help CarlB, so I will
  10. Cronos_2P

    Error Isogen of Cadworx

    Thank you very much for your help Carlos, it is not clear to me how to solve the error, I cannot understand what option you mean by saying that it should not be blank.
  11. Cronos_2P

    Error Isogen of Cadworx

    Hi everyone, I am trying to generate isometric plans in Cadworx Plant 2018, I already have my isos folder configured, but when I execute the IGO or IGB command, I get the following error: Error opening file for write (1) File: C:\WINDOWS\system32\isogen.log. and I don't know how to solve it...
  12. Cronos_2P

    Minimum distance between buried pipes

    Thank you very much everyone for the responses. As for LittleInch's question, the doubt has arisen when I saw on the plan of a pumping station that it has a truck loading area. In the installation there are two parallel 3 "pipes through which ethanol circulates, this are buried 1m deep and 12"...
  13. Cronos_2P

    Minimum distance between buried pipes

    Hello everyone. I have a question regarding the minimum separation between two buried hydrocarbon steel pipes. Are there any recommendations or restrictions in any standard (ASME, API or other) regarding the minimum distance between two or more buried pipes? If so, in which standard can I find...
  14. Cronos_2P

    Distance between two circumferential welds in a pipe

    Apparently, this data is not specified in any standard. Thank you very much for the help.
  15. Cronos_2P

    Distance between two circumferential welds in a pipe

    Hi everyone. In API 1104, ASME or some other standard, is it specified what is the minimum distance between two circumferential welds in a pipe? Thanks in advance
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