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  1. VladimirWH

    subsea equipment - cable tray for "spare" cables

    Hi! Designing a subsea gathering manifold ("GM"), with 10 cluster manifold ("CM") connection, I find out difficulties with cable tray configuration. For better understanding: gathering manifold has a typicaly cable tray system ("A" system) which is placed "inside" of it gathering manifold has a...
  2. VladimirWH

    Pressure safety valve best practise

    Thank you, sir, for the offer but now It's not so necessary. Maybe I was wrong when I said about DN150/DN300. So I wiil calculate it by myself and if I have a question I write. Ok, thank you.
  3. VladimirWH

    Pressure safety valve best practise

    100% reservation by flow rate Yeah, but mostly costumer refers to a GOST document, it's mean 100% reservation by flow rate By supplier calculation and his basic model range. I want to thank all of you. And, how I said, the main cause of my problem is regulating documents and sometime useless...
  4. VladimirWH

    Pressure safety valve best practise

    danschwind, Latexman thnak you for answear. It's a horrible incident. Yes, sir. How I said, usually we design station with much lower flow rate, but in that project we have trouble with big safety valves. I with collegues think that the best thing use relief valve with safety overpressure...
  5. VladimirWH

    Pressure safety valve best practise

    Right, sir. RV1 and RV2 operates in different time (redundant spare). Right. Yeah, historically, in my department parametrs of safety valve and inlet outlet pipe choosing by manufacturer standart and run pipe diametr and always everything was allright, but now we have a problem with big safety...
  6. VladimirWH

    Pressure safety valve best practise

    Hello! I have a question about calculating safety valve and inlet/oulet pipe. I know there are a lot of informmation in this forum about it but not exactly what I need. The thing is I'm working in russia with russian standart (GOST). In present time i'm worjing in unusual project and have some...
  7. VladimirWH

    How make central priming system for centrifugal pumps?

    Centrifugal pumps - Horizontal Split Case Pump.
  8. VladimirWH

    How make central priming system for centrifugal pumps?

    Hello! I have some problem with central priming system (scheme attached). So, I have three centrifugal pumps (Q=1300 m3/h; H=90m; N=500kW), two of them primary, third - standby (P-001,P-002,P-003 in scheme). All system works on pantoon (barge), it's low lift station like. Customer want to use...
  9. VladimirWH

    Copper seal with stainless steel pipe

    Usually we use metric thread on gauge.
  10. VladimirWH

    Copper seal with stainless steel pipe

    Simple methanol pumping: work. temp. +5 C; suction pressure - atm; discharge - 10 MPa; climate-marine. Latexman, Dhurjati Sen, thank you for answering
  11. VladimirWH

    Copper seal with stainless steel pipe

    Hello. I designed methanol dozen station, MOC - 316SS. So I used copper seal in gauge (pressure gauge, for example) place connection (flat type seal) like always. So, customer checked station's draws and other documentation and said, that using copper seal is not acceptebale. Now I have a...
  12. VladimirWH

    Double line with check valve and ball valve for Spill over system in tank

    Hello! I'm piping designer and preapre P&ID. So,I made spill over system with check valve but customer want to add ball valve in parallel line,and now it looks like double line one with cheack valve and another with ball vavle. Tank - 0,6 m3, atm. press., methanol. I can't understand why need...
  13. VladimirWH

    How does my profession translate into English

    Hello. I need some advise about how my current profession translate into English. I'm work CAD (autocad/inventor/kompas). Most of things i'm design in 3D. Recently design piping for chemical injection station (skid). Also I work on pumping stations, make steel constructions for it. It's call...
  14. VladimirWH

    Difficult with weld joints, WPS and duties

    Kingnero, DekDee, thank for answers. I make some pics for joints: preparation cut and sizes of joints based on welding's GOST (16047 and 14771). Part of joints with full penetration, part without. Specifically these (I mean joints in first question) without. Got it. Now I wanna know next...
  15. VladimirWH

    Difficult with weld joints, WPS and duties

    Hello. I am mechanical designer. Now I work on foregein project (to me, I'm from Russia) basic on ASME, AWS, DEP and other special documents designed by buyer. My company work with that documents first time (usually we use GOST (ГОСТ) system). Project - methanol injection skid - consist of...
  16. VladimirWH

    Why DBB before pump have same class that discharge line?

    There is no bypass. We have connection between PSV and tank.
  17. VladimirWH

    Why DBB before pump have same class that discharge line?

    Hello. I got some comment about project - injection pump station, with diaphragm pump. So, station consist of tank-dbb- y-strainer -dbb-pump-membrane accumulator-*PSV*-check valve-rotameter-dbb (drain system I doesn't write). Class suction line - 150, discharge - 900. Client's specialist...

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