Sy - CAESAR II - Help

CAESAR II Users Guide

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

Specifies the yield stress, Sy. CAESAR II fills the box automatically after you select the material and piping code.

Typical units (depending on your unit system):

  • lb/in2

  • KPa

  • N/mm²

The field changes according to the current piping code and is generally used for transmission and non-US piping codes.

B31.1

Used only for the hydrotest allowable.

B31.3, B31.3 Chapter IX

Used only for the hydrotest allowable.

B31.4, B31.4 Chapter IX, B31.4 Chapter XI

Specified minimum yield stress. Used for the allowable stress determination.

B31.5

Used to satisfy the requirements of Paragraph 523.2.2.f.4. This paragraph addresses ferrous materials in piping systems between -20F and -150F. The value typed here should be the quantity (40% of the allowable) as detailed in the Code. When Sy is defined, the OPE case is considered a stress case. This value is the allowable reported in the output report. The computed operating stress includes all longitudinal components and ignore torsion.

B31.8, B31.8 Chapter VIII

Specified minimum yield stress.

B31.9

Used only for the hydrotest allowable.

ASME Sect III Class 2 and 3

Basic material yield strength at design temperature for use in Eqn. 9 for consideration of Level A and B service limits. Level C and Level D service limits must be satisfied in separate runs by adjusting the value for the occasional factor in the CAESAR II configuration file. If the occasional factor is set to 1.2, the allowable stress is the minimum of 1.2 x 1.5 SH or 1.5 SY. If the factor is 1.5, the allowable is the minimum of 1.5 x 1.5 SH or 1.8 SY. If the factor is 2.0, the allowable is the minimum of 2.0 x 1.5 SH or 2.0 SY. To satisfy the code, replace SH with SM for the latter two.

Navy 505

Not used.

CAN Z662

Minimum yield strength taken from the standards or specifications under which the pipe was purchased or according to clause 4.3.3.

BS 806

Sustained stress limit. The lower of 0.8 X 0.2% Proof stress value or the creep rupture design stress value defined in Appendix A under cold, or any other, operating condition. See 17.2(c)

Swedish Method 1

Not used. Type the yield stress at temperature in the respective SHn boxes for the up to nine possible thermal states.

Swedish Method 2

Ultimate tensile strength at room temperature.

B31.1 (1967)

Not used.

Stoomwezen (1989)

Tensile strength at room temperature. This value is referred to as Rm in the code.

RCC-M C, D - Used only for the hydrotest allowable.

CODETI

Used only for the hydrotest allowable.

Norwegian

Allowable stress at 7000 load cycles, RS, from Code Table 10.2. If you do not type a value, then this factor is not considered to control the expansion stress allowable.

FDBR

Used only for the hydrotest allowable.

BS 7159

Not used.

UKOOA

Not used.

IGE/TD/12 - Minimum yield stress (SMYS).

DNV

Not used. This value is calculated as Sy = min(Sy1, ..., Sy9).

EN-13480

Used only for the hydrotest allowable.

GPTC/Z380

Minimum yield stress.

PD-8010 Part 1

Minimum yield stress.

PD-8010 Part 2

Minimum yield stress.

ISO-14692

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

HPGSL

Not used.

JPI

Not used.