Structural tmin per Bednar?
Structural tmin per Bednar?
(OP)
In Bednar's Pressure Vessel Design Handbook, sec 3.3, he provides a "practical rule" for mim thickness for CS as follows:
min. t= [(Di+100)/1000] inch
for fabrication and handling purposes.
Is this STRUCTURAL tmin?
Would anyone know this basis for this formula?
Is there a formula for computing/ estimating structural tmin(or otherwise, apart form the one given in the codes) for B31.1 & B31.3 piping?
Thanks
min. t= [(Di+100)/1000] inch
for fabrication and handling purposes.
Is this STRUCTURAL tmin?
Would anyone know this basis for this formula?
Is there a formula for computing/ estimating structural tmin(or otherwise, apart form the one given in the codes) for B31.1 & B31.3 piping?
Thanks





RE: Structural tmin per Bednar?
Only put off until tomorrow what you are willing to die having left undone. - Pablo Picasso
RE: Structural tmin per Bednar?
Gives a Tmin of 0.101 for 1-inch OK
Gives a Tmin of 0.106 for 6-inch *wrong*
RE: Structural tmin per Bednar?
The formula is correct, i.e., not a typo. That's why I want to know the basis for it.
RE: Structural tmin per Bednar?
Only put off until tomorrow what you are willing to die having left undone. - Pablo Picasso
RE: Structural tmin per Bednar?
I have asked for an interpretation of what an authority said, the basis and if there are other means "apart from the ones given in the codes." Both responses from you are all but relevant to the questions.
Please let others respond.
RE: Structural tmin per Bednar?
Only put off until tomorrow what you are willing to die having left undone. - Pablo Picasso
RE: Structural tmin per Bednar?
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It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)