live dead legs
live dead legs
(OP)
Where and in what code book does it speak of the removal of live dead leg piping supports?
buzz57
buzz57
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RE: live dead legs
http://virtualpipeline.spaces.msn.com
"What gets us into trouble is not what we don't know, its what we know for sure" - Mark Twain
RE: live dead legs
Dead legs build up with corrosion products or corrosives and tend to forgotten and not looked at. I've had more than my fair share of leaks associated with them. I've even had a situation where another company supply feedstock had a very minor deadleg that didn't get purged properly. The O2 in the air was more than enough to cause an ethylene reactor to run away.
RE: live dead legs
Of In-service Piping Systems API 570 about dead legs one can read.
“5.3.2 Dead legs
The corrosion rate in dead legs can vary significantly from adjacent active piping. The inspector should monitor wall thickness on selected dead legs, including both the stagnant end and at the connection to an active line. In hot piping systems, the high-point area may corrode due to convective currents set up in the dead leg. Consideration should be given to removing dead legs that serve no further process purpose.”
Regards
Luis marques
RE: live dead legs
,,,Chabee,,,
26.10.82
RE: live dead legs
RE: live dead legs
We can always add provisons using a hot tap or during a turnaround.
RE: live dead legs
"...did not identify hazards arising from the dead-leg when it was created in the 1990s and did not implement safeguards, such as removing the piping, isolating it from the process using metal plates known as blinds, or protecting it against freezing temperatures."
RE: live dead legs
RE: live dead legs