Load Case Calculation Overview

Description

Shell calculated wall thickness

Buckling Calculation (wind)

Roof Pressure (on the Shell)

Objective

Calculate the RL based on corrosion

Calculate the number of Wind Girders needed for the Course and the RL

Calculate the impact on RL of Roof pressure on the tank Shell.

General RBI Specs

**General Component Data

*EQUIP SPECIFICATIONS

**COMPONENT SPECS

Other specifications might be required, depending on material, DM, Component

Compliance Code (e.g. DEP, API)

Pitting (checked=yes)

Joint Efficiency Factor** (if not specified, default derived from SRBI-SHELL JOINT TYPE*)

Thickness as built**

For Courses:

Course Height**
Yield**
Tensile strength**
MAXIMUM FILL HEIGHT*

SRBI-DIAMETER*

SPEC GRAVITY @ OP TEMP*

DESIGN PRESS*

For Roof and Floor:

RENEWAL THICKNESS**

Compliance Code

SRBI-MAX OPERATING TEMPERATURE*

SRBI-WINDSPEED*

SRBI-DESIGN VACUUM*

AND the LCI Calculations

Course Height** (top Course)

SRBI-DIAMETER*

Output

RL (used for NID)

Product Height**

Minimum Allowable Wall Thickness**

Number of Girders required (optional)

RL (for reference only)

RL (for reference only)

Where to find it

RBI Analysis – Calculator Tab

Menu bar on Equipment Level

Menu bar on Equipment Level

Notes | Recommended Approach

For first calculation, need to provide data for at least one inspection (with current wall thickness)

For a proper calculation of buckling, all Courses must be added.

If RL is lower than LC1, additional measures must be taken to assure integrity.

LC1, LC2, and LC3 are not applicable to riveted Shells.