Offshore Platform Solid Deck Sheet Change-out without the use of Hot Work (Cold Work Only)

[MarLal]

Good Evening Guys,

Have a question and would be grateful for any advice offered. Currently working on a project where we need to change some our deck sheets out and replace them with new ones because of heavy corrosion. We cannot use Hot Work because the facility is live and gas is flowing, we must only use Cold Work Methods. Do you have any suggestions?

Thanks a lot.

MarLal

 

[racookpe1978]

Drilling, sawing are cold work. (Chips are cold from a drill, band saw or ripout saw.)

Grinding is out. Flame-cutting or plasma cutting are also out.

EDM is good question - Seems like the spark itself is the definition of a spark-producing oepration in free air. Can't keep the work under fluid.

Milling is cold work - but like a lathe generates chips that are often "warm" to the touch - (not above flame temperatures), but not red hot if the cutting rate is low.

 

[GD2]

Studding. There are companies who will do it for you.

GDD
Canada

 

[MarLal]

Thanks a lot for the replies guys. I will look at these options.

 

[IFRs]

water jet

 

[racookpe1978]

Water jet is a good idea, but you've got to thoroughly contain the spray from the back side from impinging across the "room" (into the next room or across an open area) after it has cut through the structure being cut out It's that "next room" where the water could damage eqpt, piping, or structure. electrical and instrument lines are particularly affected by the "spray" even if not actually hit by even a moderate pressure water remnant.

And, of course, over time, the water through spray and overspray will leak below into the room or equipment below, cable trays below.

 

[MarLal]

Thanks again for all the comments guys.

 

[JStephen]

Is "solid deck" checker-plate or the equivalent?
Perhaps putting new deck down over the old corroded deck. Not ideal from a corrosion perspective, but may be the most practical approach.