MDMT for black iron pipe
MDMT for black iron pipe
(OP)
Am starting a new design project and am trying to find the MDMT for a segment of black iron pipe that's in an exiting system. Was wondering if anyone could provide some assistance.
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MDMT for black iron pipe
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MDMT for black iron pipeMDMT for black iron pipe(OP)
Am starting a new design project and am trying to find the MDMT for a segment of black iron pipe that's in an exiting system. Was wondering if anyone could provide some assistance.
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RE: MDMT for black iron pipe
What is the design code and material spec?
RE: MDMT for black iron pipe
RE: MDMT for black iron pipe
RE: MDMT for black iron pipe
And I'm not sure what is the exiting system, is it something related to the high security prison and carrying almond smelling gas or simiar?
cheers,
gr2vessels
RE: MDMT for black iron pipe
To determine its minimum design temperature of a pipe, just knowing it is "black iron" and "2 inch diameter" is not enough.
RE: MDMT for black iron pipe
If the pipe was made prior to about 1975-1980, it could have a ductile to brittle transition temperature above 100F.
RE: MDMT for black iron pipe
Current operating conditions: 50 psig, ambient temp, pipe is fairly new (within 10 yrs).
RE: MDMT for black iron pipe
Does the pipe have threaded fittings? Often steel pipe is called "cast black iron".
RE: MDMT for black iron pipe
RE: MDMT for black iron pipe
This is a guess.....but I bet that I am right..
"Black Iron" small bore pipe is usually A53 Grade B carbon steel.
Use ASME B31.1 to find MDMT properties etc.
Be aware that, if the system uses those cheap-ass malleable iron fittings, you are limited to both a maximum (400F) and minimum temperature by those fittings....not by the pipe.
My opinion only
-MJC
RE: MDMT for black iron pipe
If this is in a typical bottle filling plant the fittings were probably purchased at Home Depot or equal.
RE: MDMT for black iron pipe
RE: MDMT for black iron pipe
Looking at B31.3 if you have "Type F" (continuous welded)A53 Grade A a +20F minimum design temperature is permitted.
It looks like all other A53 grades and production methods allow a -20F minimum design temperature.