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  1. jives

    ASTM Equivalent to BS4360 Grade 43A ?

    Wondering what the closest ASTM Equivalent would be to BS4360 Grade 43A. Is it ASTM A36 as I have seen suggested in other online information ? Thanks. Jon Ives Alberta Canada Jonathan Ives Plant Engineering Supervisor Transalta Centralia Operations
  2. jives

    Beck Group 29 Linear Valve Actuators

    Looking for some feedback / reviews of Beck Group 29 Linear Valve Actuators for modulating control (globe) valve service. I am considering these for installation on power plant Desuperheater spray flow control valves, to replace existing Limitorque actuators. I am also looking at using piston...
  3. jives

    Preload on B31.1 Code flanged joint

    I have a question on bolt pre-load for an ASME B31.1 Code pipe flange joint. Should the total load on a bolt in the joint, including applied load from pipe internal pressure and pre-load, NOT exeed the allowable stress of the bolt material at temperature ? Or can total bolt load be safely...
  4. jives

    Welding 2" Pipe into 3"x4" A234 WPB Reducer

    I'm in the process of designing some piping modifications for a replacement pump. I'm somewhat limited, in the vertical dimension, for my discharge pipe and fittings. Is it possible to weld a 2" pipe into the side of a A234 WPB 4" x 3" reducer without sacrificing the integrity of the reducer...
  5. jives

    Water Sprays for Anhydrous Ammonia Storage Tank

    I'll be setting up a 1000 US Gallon, Anhydrous Ammonia Storage Tank. I am looking for some tips on setting up a water spray nozzle system to abate an ammonia vapor cloud in the (unlikely) event of a major leak or tank rupture. Any ideas or experience with this out there ? Jonathan Ives...
  6. jives

    Repairing vessel shell - SA 516 Gr. 70 - Post Weld Heat Treatment

    Anyone have any guidance on the following: We are going to cut out and then replace a section of shell from a pressure vessel. Shell material is SA 516 Gr. 70. Shell thickness is 3/4". MAWP of shell is 160 psig. Shell inside diameter is approximately 62". Fluid in shell is treated boiler...
  7. jives

    Ventilating Outlet of Flyash Mixer

    On our site we have a pug-mill type mixer which is used to mix fine, dry fly-ash from coal-fired boilers with water. The flyash and water is mixed into a coarse paste in the pug-mill and then dumps from the pug-mill into a haul-truck. The pug-mill is supposed to be "dustless" in that no dust...
  8. jives

    Edmonton Area Frost Line

    I am wondering if anyone out there knows, generally, what the depth of the frost line is in the Edmonton area. I am assuming that I can bury a raw water pipeline 8 feet below ground, and the water in the line will not freeze.

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