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  1. DDChem

    Square Knife-Gate Valve Flange Standard

    I am looking at installing a square knife-gate valve. Can anyone tell me what the industry standard is for the required mating flange? (E.g. dimensions, bolt hole pattern, etc.) Thank you.
  2. DDChem

    Coloured circles on hydro poles

    Hi everyone. This isn’t project-related but just always been curious and thought someone on here would be able to give me an answer. Sometimes I see three small coloured circles on hydro poles and I was wondering what these are. They are usually at street level, about 7 ft from the bottom of the...
  3. DDChem

    Chain Length

    Hi all, wondering what is the convention for indicating the chain length of a chain-operated valve. Do you usually specify the total length of the chain loop (i.e. up and down), or just the distance from the valve to the bottom of the loop? Thanks
  4. DDChem

    Reactor Support

    Thanks for confirming. Just wanted to check before I went ahead and reinvent the wheel. Now I can invent.
  5. DDChem

    Reactor Support

    Thank you! That's exactly what I'm looking for. Do you know if there is a standard to follow if I want to use lugs to support something other than a pressure vessel? I'd like to use them to support chutes through a floor.
  6. DDChem

    Reactor Support

    Hello, I'd like someone to point me in the right direction on this. I'm looking for information on how reactor supports are designed. I'm looking for the ones that are angles with two (2) 45 degree gussets. The reactor hangs through the floor. Similar to what is shown in the image below...

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