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  1. jazimed

    Coriolis meter for gas and liquid onsite proving

    In fact i'm facing two cases, there is some locations where we can install a master meters other locations not.
  2. jazimed

    Coriolis meter for gas and liquid onsite proving

    Hi, in the frame of geting a local regulatory approval, we are asked to do the proving of coriolis meters onsite. Some of the meters are for gas and others are for liquid. The problem is that the manufacturer said that there's no way to do the proving onsite while the local legal metrology...
  3. jazimed

    Screw Pump with Recycling Line

    LittleInch, Thank you for your reply. I agree to have a separate recycle line with an external Pressure Safety Valve. at the other hand, I cannot see how the compressibility of the crude oil will allow to pump from 3 to 4 min without noticing a pressure rise!!!
  4. jazimed

    Screw Pump with Recycling Line

    I need your support please. I'm about to install a screw pump to transfer crude oil through 18 Km of 8" pipeline. As a safeguard, the pump is equipped with an integrated Pressure relief valve plus a high pressure switch which will be installed on the discharge line of the pipe to trip the pump...
  5. jazimed

    Low ferrite % for A790UNS S31803 during qualification

    Also, shall I keep the interpass temperature 150°C or I have to go below that?
  6. jazimed

    Low ferrite % for A790UNS S31803 during qualification

    Just Received the metallography examination report and it's showing the ferrite% as follow: BM= 50%, HAZ= 44%, Weld(root)=34% Weld(cap)=29%. Now I'm 100% sure about the conformity of the base metal. Obviously, the SMAW process is affecting the ferrite % in the weld. That's why I'm intending to...
  7. jazimed

    Low ferrite % for A790UNS S31803 during qualification

    Thank you EdStainless and DekDee, I will proceed with the metallography and I will let you know about the results.
  8. jazimed

    Low ferrite % for A790UNS S31803 during qualification

    Figueredo, My concern is about the low ferrite in the 3 zones which are below the requirement 35-65%. Obviously, if the ferrite% is low in the BM, it will be so in the HAZ and in the weld. That's why I believe that the problem is in the material itself and the only way to be sure is to make...
  9. jazimed

    Low ferrite % for A790UNS S31803 during qualification

    brimstoner, I will do a metallographic examination anyway. but I wonder what will be the utility of the ferritscope (as a method), if it doesn't give accurate figures in regard to the metallographic examination. the material certificate (if we trust it) shows ferrite% 52% as per ASTM E562 and...
  10. jazimed

    Low ferrite % for A790UNS S31803 during qualification

    EdStainless, thank you for your iterest to my issue, Please, find attached the third party ferrite test report. Yes indeed there is standard cal used to check he accuracy of the scope before measurement on the BM. Regarding, the the weld metal dillution %, still I didn't make the macrographic...
  11. jazimed

    Low ferrite % for A790UNS S31803 during qualification

    metengr, In fact, i was preserving the coupon for the remaining inspections to qualify the PQR since the lab examination requires its destruction, that's why I've done one more feritscope inspection with 3rd party and I had almost the same results as the first one. this is not enough to say...
  12. jazimed

    Low ferrite % for A790UNS S31803 during qualification

    metengr, thank you for your quick response. Do you mean that we cannot trust feritscope at this level and should consider only the metallographic examination to check the exact ferrite amount? what if there is a requirements to check the ferrite% in every production joint? this means there will...
  13. jazimed

    Low ferrite % for A790UNS S31803 during qualification

    I'm about to prepare a PQR with a Pipe smls NACE BE 4'' S-40S A790UNS S31803 B36.19. Test coupon: two pup pieces of 150mm butt welded each one to another The welding process used for qualifcation is as follow: Root Pass: - GTAW Process - Filler metal: ER2209 2.4mm - shield gas: Argon -...

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