# ASME B31G Remaining Strength of Corroded Pipeline

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about START-PROF pipe stress analysis software

Allows to calculate, if the corroded pipeline segment must
be replaced. The results of analysis
are:

- Failure stress: the maximum
allowed hoop stress
- Safe pressure: the maximum
allowed operating pressure, with safety factor
- Burst pressure: the burst
pressure, without the safety factor
- The maximum allowed flaw
length

### Method #1 Original B31G (.67dL), B31G Level 1

This method approximates the flaw area A as 0.67 * d * L

### Method #2 Modified B31G (.85dL), B31G Level 1

This method approximates the flaw area A as 0.85 * d * L

### Method #3 Exact Trapezoid

Calculates the corroded area A numerically using the trapezoid
method

### Method #4 Equivalent Area

Calculates the corroded area A as d_a * L, where d_a is average
pit depth. An equivalent flaw length L * d_a / d is used in the computation
of the Folias factor.

### Method #5 RSTRENG Effective Area, B31G Level 2

Calculates the corroded area A calculated numerically using
the trapezoid method. All possible combinations of local metal loss A
are calculated, n!/2(n − 2)! iterations are required to examine all possible
combinations of local metal loss with respect to surrounding remaining
material. The exact trapezoid method is just a special case of an effective
method.

#### Input Data

#### Menu Access

**ASME B31G >** Pipe