Specifies the lower temperature limits as defined by B31.3 paragraph 323.2.2 for materials to be used without impact testing. For carbon steels with a letter designation in the minimum temperature column of B31.3 Table A-1, the minimum temperature Tmin is defined by the applicable curve in Figure 323.2.2A. If applicable, type A, B, C, or D.
For materials that do not have the curve letter specified in the minimum temperature column of B31.3 Table A-1, use one of the following letters to represent the specified numerical value of Tmin.
|
Tmin |
---|---|
O |
-20 |
P |
-50 |
Q |
-60 |
R |
-75 |
S |
-100 |
T |
-150 |
U |
-275 |
V |
-320 |
W |
-325 |
X |
-425 |
Y |
-452 |
Z |
Unspecified You can also leave the box blank. |
For more information, see B31.3 Minimum Design Metal Temperature (MDMT) Without Impact Testing.