B1; Wc - CAESAR II - Help

CAESAR II Users Guide

Language
Русский
Product
CAESAR II
Search by Category
Help
CAESAR II Version
12

Specifies values that depend upon the code that you are using.

ASME Class 2 and ASME Class 3

Defines the primary stress index used for the given node on the current element.

Unless you otherwise over ride this value, the following values are applied for ASME Class 2 and Class 3 piping:

Straight Pipe:

B1 = 0.5 B2 = 1.0

Curved Pipe:

B1 = -0.1 + 0.4h; but not <0 or >0.5

B2 = 1.30/h**2/3 but not <1.0; h = tR/ rm**2

Intersections:

B1 = 0.5

Butt Welded Tees:

B2b = 0.4(R/T)**2/3 but not < 1.0

B2r = 0.5(R/T)**2/3 but not < 1.0

Branch Connections:

(r < 0.5R)

B2b = 0.50 C2b but not < 1.0

B2r = 0.75 C2r but not < 1.0

C2b = 3(R/T)**2/3 (r/R)**1/2 (t/T)(r/FTG ro) but not < 1.5

C2r = 1.15(r/t)**1/4 but not < 1.5

B31.1 / B31.3

Defines the weld strength reduction factor (Wc) used to reduce the allowable stress for the sustained load case.

B31.3 Chapter IX

Not used.

BS-7159 and UKOOA

Defines the pressure stress multiplier (m) if it is different than the code requirements. For straight pipe, m = 1.0; for bends and tees, m is defined in Figures 7.1 and 7.12 of the BS 7159 Code.

IGE/TD/12

Override the cyclic pressure stress intensification factor Ip(Cyc) if it is different than the code calculations (calculated according to Table 9, Figure 5, and Figure 7 of the code).