Pipelineintegrity Engineering

API RP 1170 / NACE SP0502 Maximum Pit Depth Estimator (Gumbel Extreme Value Distribution) calculator

API RP 1170 / NACE SP0502 Maximum Pit Depth Estimator (Gumbel Extreme Value Distribution) engineering calculator.

Runnable This tool can run, but independent engineering verification has not been established.

Quick Answer

Calculate API RP 1170 / NACE SP0502 Maximum Pit Depth Estimator (Gumbel Extreme Value Distribution)

Calculator

Maximum Pit Depth (m)
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Result Interpretation

API RP 1170 / NACE SP0502 Maximum Pit Depth Estimator (Gumbel Extreme Value Distribution) calculator computes Maximum Pit Depth in m using the defined engineering formula and the input values provided. Maximum Pit Depth is expressed in m. No universal acceptance threshold is defined by this calculator.

Worked Example

Verified calculation

Given:

  • Gumbel Location Parameter (μ) = 0.00012
  • Gumbel Scale Parameter (β) = 4.8E-5

Expected Result:

  • Maximum Pit Depth = 2.7233052772029E-5

Engineering Interpretation:

Under the given input conditions, the calculated result is: Maximum Pit Depth = 2.7233052772029E-5 m.

The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from deterministically validated test cases.

Formula / Method

maximum pit depth = μ + β * (-log(-log(1 - 0.999)))

Formula family: formula_pipelineintegrity_pitting_corrosion_depth_distribution_analyzer_api_rp_1170_nace_sp05

Variables

SymbolLabelRoleDescription
location_parameter Gumbel Location Parameter (μ) INPUT Gumbel Location Parameter (μ)
scale_parameter Gumbel Scale Parameter (β) INPUT Gumbel Scale Parameter (β)
maximum_pit_depth Maximum Pit Depth OUTPUT Maximum Pit Depth

Calculation Steps

  1. Enter the gumbel location parameter (μ) in m.
  2. Enter the gumbel scale parameter (β) in m.
  3. Step 1: Compute maximum pit depth.
  4. Read the maximum pit depth (m) from the results.

Engineering Summary

Calculate API RP 1170 / NACE SP0502 Maximum Pit Depth Estimator (Gumbel Extreme Value Distribution)

Frequently Asked Questions

What does this calculator calculate?

The API RP 1170 / NACE SP0502 Maximum Pit Depth Estimator (Gumbel Extreme Value Distribution) calculator estimates Maximum Pit Depth based on the input parameters you provide

Why is gumbel location parameter (μ) important in this calculation?

gumbel location parameter (μ) is directly proportional to maximum pit depth. When you enter gumbel location parameter (μ) in m, the calculator uses it in the engineering formula to compute the output

How should I interpret the result maximum pit depth?

The calculator outputs maximum pit depth in m. The result is computed directly from the input values using the defined engineering formula

What units should I use for the inputs?

Enter each value in the units shown next to the input field: Gumbel Location Parameter (μ) (m), Gumbel Scale Parameter (β) (m). Make sure all inputs use the specified units for consistent results

What assumptions does this calculator use?

This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment

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