Eff - CAESAR II - Help

CAESAR II Users Guide

Language
English
Product
CAESAR II
Search by Category
Help
CAESAR II Version
13

Specifies the longitudinal weld joint efficiency. The field changes according to the current piping code.

B31.1, B31.1-1967, B31.5

Allowable stress tables include longitudinal weld joint efficiencies where applicable. If Eff is specified, then values for SC and SH are divided by Eff before they are used in the flexibility calculations. Eff is ignored in the minimum wall calculation.

B31.3, B31.4, B31.4 Chapter XI, B31.8, B31.8 Chapter VIII, NAVY 505, Z662 (J), BS 806 (e), CODETI (z), FDBR (vl), GPTC/Z380

Allowable stress or yield stress tables do not include longitudinal weld joint efficiencies. Eff is ignored for the flexibility calculations. SH is multiplied by Eff when calculating the minimum wall thickness.

B31.4 Chapter IX, ASME NC, ASME ND, RCCM-C, RCCM-D

Ignored for both flexibility and minimum wall thickness calculations. The box is disabled for these codes.

Swedish Method 1, Swedish Method 2, Norwegian TBK 5-6

Circumferential joint factor z and is used in the calculation of the code stresses rather than in the calculation of the allowables. This applies to both flexibility or minimum wall thickness.

Stoomwezen

Cyclic reduction factor referred to as Cf in the code. CAESAR II does not consider weld joint efficiency for this code.

BS 7159

Ratio of the hoop modulus to the axial modulus of elasticity Eh/Ea. The software uses a default value of 1.0, as though the material is isotropic if you leave this box blank.

UKOOA

Replace this box with f2. This is the system design factor. The value is typically 0.67.

IGE/TD/12

Replace this box with Dfac. This is the system design factor (f) as described in Table 2 of the IFE/TD/12 code. The value must be 0.3, 0.5, and 0.67.

DNV

Replaces this box with usage factor Ns (pressure yielding) from Tables C1 or C2. The value must be between 0.77 and 0.96.

EN-13480

Ignored for the flexibility calculations. SH is multiplied by Eff when calculating the minimum wall thickness.

PD-8010 Part 1

Weld joint factor used in determining the allowable hoop stress. See Section 6.4.3.1 for details.

PD-8010 Part 2

Not used.

ISO 14692

Eff is used in a different way. See the Reference for ISO 14692.

HPGSL

Longitudinal weld joint efficiency.

JPI

Longitudinal weld joint efficiency.