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Recent content by doig

  1. doig

    underwater diver rigging winches with swivel base

    Roymack, OK, I get the picture. In my view your group is the 'contractor,' tasked to both install the P/L & tie it in with spools. Is this correct? Is your group installing the P/L? The tie-in diving from the DSV? Airbags should provdie the control you'll need. What's the length of spool...
  2. doig

    underwater diver rigging winches with swivel base

    Roymack, returned from Scotland about a month ago in the Stirling and Thornhill area, ancestral home area of the Doigs. Great place. 1. What is your role here? Operator-engineer, a contractor working w/ the Operator? Or, are you w/ a diving contractor putting this this spool in? All of these...
  3. doig

    Polyethylene Antioxidant levels

    Day363, Details, details, details: Where IS the P/L? Underwater or in air or buried? What is the service? How deep? This could be several cause: Cathodic disbondment comes to mind? Was this the sole coating? I believe you said it was 'extruded onto the pipe'? New to me but why? Was the pipe...
  4. doig

    Jam Nuts

    Kat, You are using 'Jam nut as in "double nutting." In my experience, the very best thing that can be done w/ flange bolts is to star torque to pre-set values w/ a compound (gear driven) torque wrench. DOuble nutting after that simply tries to maintain the first 'torque' value. Two things you...
  5. doig

    underwater diver rigging winches with swivel base

    Roymack, pardner you need to share a LOT more information to get this job well understood. What are you trying to do? And where are you? (GOM? Indonesia?) What resources are available or are you determining that? Hopefully you are. Are there any platforms at the site and associated w/ this...
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