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  1. stuarte

    WHY VENTS AND DRAINS REQUIRED

    Please can someone explain to me in laymans terms in general when would you implement the use of drains and vents on a piping system.I am told at all high points for vents and all low point for drains.But why? please help
  2. stuarte

    Max Flow Rate

    Please can someone explain to me in laymans terms in general when would you implement the use of drains and vents on a piping system.I am told at all high points for vents and all low point for drains.But why? please help
  3. stuarte

    valve ratings need explaining

    Please can someone tell me how valves are rated ie class 800 screwed i am told is the same as flanged valve of class 150 .So confusing !
  4. stuarte

    STAINLESS STEEL FLANGES MATED WITH GALVANISED CARBON STEEL

    Please can someone tell me what the effect wiil be if these flanges are mated .Do they require an insulating bolt set and if so what spec to use and why.Please alaborate on what happens between the two metals if not insulated.
  5. stuarte

    ASTM A182 INSTEAD OF ASTM A105

    hi there, please can someone advise me as to wheather it is ok to use a valve of standard ASTM A182 instead of ASTM A105.The pipe line is carbon steel.I realise that A182 is for higher temperatures and will do the job but I am not sure if it is ok to mate the A182 flanges of the valve with...
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