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• 304
Accepted

Pound-force (lbf) vs Pound-mass (lbm)

I wrote this paper in response to a declaration made by Dynamics Professor that "there is no difference between a lbm and lbf." The discussions from the students that followed exposed a huge ...

Pound-force (lbf) vs Pound-mass (lbm)

1 pound mass is that mass that weighs one pound in 1 g gravity. For most practical cases, a pound mass and a pound weight define the same amount of stuff on the surface of the earth. To define a ...
• 11.3k

Pound-force (lbf) vs Pound-mass (lbm)

There seems to be some confusion here. In the English (or American) system the "official" measure of mass is the slug. Turns out that 32.2 lbm = 1 slug. So to plug into the equation F=MA you can use M ...

Pound-force (lbf) vs Pound-mass (lbm)

lbf has two definitions and a friend called Poundal (1) EE System The force required to accelerate 1 lbm 32.174049 ft/s^2 (i.e., acceleration due to gravity) However, the problem with this is that ...
Accepted

Is there such thing as supreme board for international arbitrators?

They can't even write English on their certificate. ... training of good stand, and is in accord with American and European standers... That's an obvious typo. Of course it should say ... ...
• 12.4k

ISO standards for drawing reserve equiptment in P&IDs

A P&ID should reflect reality A P&ID that doens't reflect the actual piping construction is a flowchart, not a P&ID. P&ID's are used to determine valve lockout and blind flange ...
• 5,980
Accepted

ISO standards for drawing reserve equiptment in P&IDs

From ISO 10628-1 Diagrams for the chemical and petrochemical industry — Part 1: Specification of diagrams 4.4 Piping and instrumentation diagrams (P&ID) All equipment, valves, and fittings shall ...
• 2,477
Accepted

US customary units below 1 mil/thou?

50μm → 0.002" or 2 thou or 2 mils? I've seen both 0.002" and 2 mils. On a drawing it would always be 0.002". In a specification document it could be either. I've never seen 2 thou written in a ...
• 2,626
1 vote
Accepted

Where to find a complete overview for ISO P&ID standards?

Well basically the text of the standard is available at: iso.org Though ISO has a number of local distributors, that may be more convenient to deal with or even get free acces through university ...
• 3,522
1 vote

Pound-force (lbf) vs Pound-mass (lbm)

lbm and lbf are not the same -- they are only of the same value in one situation, when dealing with gravity at sea level... examine a situation without gravity, the force produced by a jet of water. ...
• 11
1 vote

Pound-force (lbf) vs Pound-mass (lbm)

I will try to make it as simple as possible and will provide an example: -First of all ignore the word slug... I know it is the standard unit for mass and so is lbm. you will see lbm used in your ...
• 11
1 vote

Pound-force (lbf) vs Pound-mass (lbm)

Absolutely, yes you can. In fact, the mass of a slug is derived from the acceleration due to gravity.
• 3,135

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