On Mar 8, 11:43*am, Vic Smith wrote:
On Mon, 07 Mar 2011 23:07:21 -0500, mm
wrote:



But when the t&p valve blows for temp, it's 210 or more. * Do they
blow for temp or for pressure?

Both as far as I know.

What's a detached lagging?

Lagging is insulation. *Don't know how the name came about.
It's what we called a certain removable insulation used in Navy fire
rooms. *Engine rooms had plenty too.
Commonly used around valve flanges, superheaters or other parts that
were expected to be disassembled for maintenance.
Basically made-to-fit asbestos cloth bags. *Think they were filled
with more asbestos. *Can't remember ever seeing what was inside, or
seeing a torn one.
The cloth was thick and had bulit-in metal loops so you could wire it
up. *I forgot most of it. *Been over 40 years since I worked with it.
The detached one that was smoldering probably had oil spilled on it.
Everything was hot there.
Lit my smokes in a hole in the insulation of feed pump turbine head.
Pump was run by steam superheated to 900 F.
Don't know how much heat you need to light a smoke, but it only took a
couple puffs when stuck in there near the turbine head.
Burned my nose a couple times, but not enough to blister.

--Vic

Yes, lagging is another word for insulation. There are a lot of people
here don't speak proper English & might not know this.