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  1. Kajtek08

    B31.3 Radiography Examination

    Hi, I'm hoping someone can help me clarify the B31.3 radiography examination requirements. As per B31.3 “Not less than 5% of circumferential butt and miter groove welds shall be examined fully by random radiography” If a after a hydro 5% of the welds need to be radiographed. When you have few...
  2. Kajtek08

    Knock-out drum liquid seal leg

    Hi, I have a client that is asking for a liquid seal leg on a knock-out drum drain line. Can anyone tell me what is a liquid seal leg and and how it functions? Thanks, Kajtek
  3. Kajtek08

    6ö MOV and gate valve fitting to fitting.

    I have a client who wants to install a 6” MOV and a gate valve fitting to fitting on a gasoline storage tank suction line. Is that could practice? Should there be a spool in between with a drain so when the tank is isolated (gate valve) the spool could be drained and the MOV could be...
  4. Kajtek08

    Double block and bleed - Is a vent required?

    If you have a piping configuration where you have two gate valves a spool in between and a drain, and the spool needs to be drained when the valves are closed, would you also need a vent for draining to prevent a vacuum? Does the spool length determine if you need a vent?
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