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  1. Headache2013

    Strong Acids and Strong Bases

    Sirs; Would you please to assist by answering to my questions. Thanks
  2. Headache2013

    Strong Acids and Strong Bases

    Sirs; I have to design a storage area for some chemical products (defoaming agent, glycol, corrosion inhibitor, emulsion breaker, deoiler, biocide and scale inhibitor).. I learnt from several literatures that we shall separate chemicals if these chemicals can react between each other. In the...
  3. Headache2013

    Outdoor Storage of Chemical Products

    Sirs; I'm waiting your positive advices. Would you please to assist. Thanks
  4. Headache2013

    Outdoor Storage of Chemical Products

    Thank you bimr; A summary of all MSDS (material safety datasheets) of all chemical products is attached to this post. d) NFPA 30 doesn't give any requirements (from fire fighting point of view) for outdoor storage. It gives only for indoor stored chemicals. Best...
  5. Headache2013

    Outdoor Storage of Chemical Products

    Sirs; We want to design an outdoor (no shelter) storage area for chemical containers (hundreds of Iso tanks, capacity: 26000 litters each tank). Several chemical products are concerned: Defoamer, Biocide, Demulsifier, Methanol, Glycol, Corrosion Inhibitor, Reverse Demulsifier...etc. These...
  6. Headache2013

    Outdoor Storage of Chemical Products

    Sirs; We want to design an outdoor (no shelter) storage area for chemical containers (hundreds of Iso tanks, capacity: 26000 litters each tank). Several chemical products are concerned: Defoamer, Biocide, Demulsifier, Methanol, Glycol, Corrosion Inhibitor, Reverse Demulsifier...etc. These...
  7. Headache2013

    Flanges in Flare Line Header

    Little Inch; You said: ''You could pressure tent off the welding area and pump in air from a safe location - this is what they do on oil rigs and refineries when they don't want to shut down''. It seems we can do this job without shutdown. This is very interesting for us. Would you please give...
  8. Headache2013

    Flanges in Flare Line Header

    Little Inch; Thank you. Before welding , do we need to inert the flare line or not? Is there any procedure to avoid inerting this long flare line. Even bag inserted , there is always risk of leakage of remaining gas in the long flare line. This makes the welding (buttweld or slip on flange)...
  9. Headache2013

    Flanges in Flare Line Header

    Hello everybody; Is there any advice from you?
  10. Headache2013

    Flanges in Flare Line Header

    Dear specialists; Thank you for your answers. It seems I have to give you more details to get more advices. Please be informed as follows: * Owner doesn't accept hot tapping. * total shut down of the facility for this tie in is limited to 24 hours. we have finish the job in 24 hours max. I'm...
  11. Headache2013

    Flanges in Flare Line Header

    No, the flare line is carbon steel spiral welded pipe.
  12. Headache2013

    Flanges in Flare Line Header

    N2 is nitrogen . The 36" flare header if very long (around 1kilometer) and it is not so easy to do butt weld from safety point of view and shutdown limitation by Owner (24 hours). This is the reason we proposed to proceed as follows: a) cold cut the existing 36" flange. b) put plaster joints...
  13. Headache2013

    Flanges in Flare Line Header

    Dears; I'd like to get your advices regarding installation of 02 flanges in an existing 36" flange line header. In the frame work of an on-going project, we have to tie in a 36" flare line header. We proposed to Owner to extend the existing 36" header by a 36" spool (cap in one side and slip...
  14. Headache2013

    Maximum Carbon Content and Maximum Equivalent Carbon

    Dear Muktiadi; Thank you for your answers. a) As you may know, generally we specify for ordinary services ASTM A105 for forged valves (small bore size) and ASTM A216 WCB for sizes 2inches and bigger. I looked to the two ASTM specification and I found C% (max) and CE% (max) are different from...
  15. Headache2013

    Maximum Carbon Content and Maximum Equivalent Carbon

    Dears; I'm writing a Technical Specification for Valves (oil and gas industry).In the paragraph dealing with ''Chemical Restriction'', I am called to specify to Valve Manufacturers the maximum carbon content and the maximum carbon equivalent. Would you please to let me know how to specify the...
  16. Headache2013

    ASME B16.9 Welded vs Semless Cap

    my question is: why among all fittings , only the cap is seamless. Why it is not welded?
  17. Headache2013

    ASME B16.9 Welded vs Semless Cap

    Sirs; My pipe specification is as follows: Pipe 18" to 36": API 5L Grade B SAW Elbow, Tee, Reducer: ASTM A234 Grade WPB-W Weld ASME B16.9 BW Cap: ASTM A234 Grade WPB ASME B16.9 BW My question is: why the cap material is A234 WPB and not A234 WPB-W? Best Regards.
  18. Headache2013

    ASME B16.9 Welded vs Semless Cap

    Dears; As per my humble experience in righting piping spécifications, when a big size is selected to be welded type (not seamless), the fittings (elbow, tees, reducers) shall be also welded type (not seamless). However the cap to select shall be seamless. Does some know the reason of this...
  19. Headache2013

    ASME B31.3 pipe system connection with ASME B31.4 pipeline system

    Thnak you Shanib
  20. Headache2013

    ASME B31.3 pipe system connection with ASME B31.4 pipeline system

    Thank Shanib; 1) is MAOP concept equivalent to design pressure concept? 2)API 5L X60 is the existing pipeline pipe. We want to connect a B31.3 piping system using a WPB tee because this is what is available in our material shop. Is it possible (technically) to do this or not? Is there any...

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