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  1. siavash1111

    information request on class/condition/temper definition in ASME B 31.3 Table A1

    Dear Member, could somebody explain for me difference between class/condition/temper column in ASME B 31.3 Table A1 for ferrous material ? http://files.engineering.com/getfile.aspx?folder=7d1d9779-a09d-4d57-8fdc-d9105d34733b&file=Table_A1.jpg
  2. siavash1111

    GGG 60 Cast Iron Welding

    metengr :TWI suggested a preheat temperature for cast iron at below link . my i know what do think about that http://www.twi-global.com/technical-knowledge/job-knowledge/weldability-of-materials-cast-irons-025/ Tmoose: i inspected the broken segment and piston surface - inside the work...
  3. siavash1111

    WPS for repairing welds and cast

    please refer to ANSI/AWS D11.2-89 (R2006) :Guide for Welding Iron Castings under section 8: Welding Procedure and Performance Qualification. the Table of Contents of this guideline can be download from below link address https://pubs.aws.org/Download_PDFS/D11.2-89-R2006PV.pdf
  4. siavash1111

    GGG 60 Cast Iron Welding

    Hi anyone in this forum can advice me min preheat and post weld heat treatment temperature which is required for welding of GGG 60 nodular cast Iron(DIN 1693). the welding electrode which i want to use for this cast iron is AWS SFA‐5.15 E NiFe-Cl the damage part is piston of a air hammer...
  5. siavash1111

    suitable hardenable filler spec for sleeve repair

    HI, ASME B 31.4 code Described “ A hardenable filler such as non-shrink epoxy or polyester resin shall be used to fill the void between the pipe and the repair sleeve “ Anybody can give me spec of non-shrink epoxy or polyester resin which should be used between pipe and sleeve Thanks
  6. siavash1111

    Torque Testing / Gear Operator Ratio Question

    Torque normally defined as Thrust * Stem Factor (stem factor based on the type of ACME thread being used on stem of the valve ) you will need to calculate thrust at max MOP for first step then you can convert that to torque with some formula i have attached some catalog for your information...
  7. siavash1111

    E-motor with high rate start stop time per hours

    I need a little help for electric motor . I need two type of Emotor with high rate start stop time per hours for my application 1- Unidirectional motor single(220 V) and there phase(380 V) with 200 start stop time per hours 2- Bidirectional motor single(220 V) and there phase (380 V) with...
  8. siavash1111

    flow match valve

    Rexa electro hydraulic actuator uses two FMV (flow match valve ) in their actuator circuit . I am not familiar with this type of valve ,Anyone know is there an alternative valve in fluid power products range ? Theory of operation of the unit can be found in below link ...
  9. siavash1111

    Swing check valve with outside lever & counterweight

    lever & counterweight are part of the locking device for the check valve API 6D mentioned that “Locking devices for check valves shall be designed to lock the valve in the open position only” . I have seen some valve manufacture products like TOM WHEATLEY, VITS , GROVE… which install in...
  10. siavash1111

    zero leakage cartridge type high speed 2-2 way solenoid valve

    I understand that If the leakage be near zero(less than 10 drops per minute) , some manufacturer refer them as zero leakage valve but I am looking for bubble tight valve (no leakage). In your experience is there something can meet my requirement ? Can you tell me if the pressure increases in...
  11. siavash1111

    zero leakage cartridge type high speed 2-2 way solenoid valve

    I am looking for a zero leakage 2/2 way solenoid valve(cartridge type ).I could not find any suitable products.Does anyone have experience in this case? If so , please address My requirements : 15 Lit/Min @ 100 bar pressure Oil type :10 CST mineral oil
  12. siavash1111

    Excavating around in-service pipeline for rehabilitation project

    We have 15 KM in service oil pipeline coating rehabilitation project to replace old coating with a new .we do excavating around the pipeline with excavator to expose pipeline . We have many problems during excavating . Such as human error , surface damage to a pipeline caused by contact of...
  13. siavash1111

    Gate Valve thrust & torque calculation method

    Hello I am looking for some formula on thrust and torque calculation method for various type of Gate Valve (Through Conduit, block &bleed , wedge , knife , Parallel …) Does everybody now how can I calculate below information for gate valve ? Open Thrust Close Thrust Open torque Close...

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