Nitrogen Blanket with Plugged Plain Ends?

[ConstantEffort]

Does anyone have experience or recommendations for holding a nitrogen blanket / purge on piping modules and skids for ocean transport when the ends are plain / beveled ends?

The client specs do not permit flanges in these services.

The construction team wants to drop modules on foundations and weld straight away. This rules out adding temporary pipe caps or plates.

I am familiar with hydro test plugs, but I’m doubtful they will hold nitrogen for weeks to months as the pipe sees some bending as the modules are handled and transported.

 

[LittleInch]

Forget nitrogen.

Use oils or similar spray.

 

[georgeverghese]

"The construction team wants to drop modules on foundations and weld straight away. "

Something has to give - there is nothing worse than piping all corroded with salt laden air. Add a sacrificial spool with screwed ends and cap it. Cut the spool off when the module is in place at destination.