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  • Users: elen_28
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  1. elen_28

    Why API prohivited the use of drilled and tapped hole on tubesheet ?

    Hi, Why API prohivited the use of drilled and tapped hole on tubesheet since 2018 ? (but TEMA 10th Edition added the clause about collar bolt and drilled hole since 2019.) Did API discovered the something of bad things about drilled and tapped hole ? Quote: Supplementary Specification to API...
  2. elen_28

    adaquate torque at hydrostatic test

    hi, Our company manufactures shell and tube heat exchanger. current spec is following: ◎code : ASME sec.VIII div.1-1998(by customer's local regulation) ◎working pressure…shell:0.2MPa /channel:6.3MPa ◎design pressure…channel:7.0Mpa ◎hydrostatic test pressure…channel:11.0Mpa(by customer's...

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