Plumbing Pipe Burst Pressure Barlow Calculator
Nominal Barlow2Sfailuret/OD burst estimate only, independently established actual failures tress not allowable code stress. Defects, corrosion, seam, plasticity and approval excluded. Actual independently matched units, regime, material/equipment and governing references; not a hydraulic code, safe pressure, water pot ability or operational approval.
Description
Barlow's nominal burst estimate relates wall stress, thickness and outside diameter.
Barlow's nominal burst estimate relates wall stress, thickness and outside diameter.1
A failure-stress estimate differs from code-based allowable operating pressure. The calculation and input requirements are explained below.
When to use Plumbing Pipe Burst Pressure Barlow Calculator
Enter positive independently established wall failure stress in Pa, wall thickness meters and outside diameter meters.
How to use Plumbing Pipe Burst Pressure Barlow Calculator and how it works
- Prepare the measurements or independently established model inputs described below, with matching units and observation scope.
- Enter the required fields and run Plumbing Pipe Burst Pressure Barlow Calculator.
- Read the result fields using the formula, output units, signs and ordering explained below.
- Correct any rejected inputs and rerun; interpret the result within the stated model and its assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| callerIndependentActualWallFailureStressPascals | Caller Independent Actual Wall Failure Stress Pascals. Use the units and matching context stated in the calculation below. | number | Required; strictly positive; finite; other constraints below |
| actualWallThicknessMeters | Actual Wall Thickness Meters. Use the units and matching context stated in the calculation below. | number | Required; strictly positive; finite; other constraints below |
| actualOuterDiameterMeters | Actual Outer Diameter Meters. Use the units and matching context stated in the calculation below. | number | Required; strictly positive; finite; other constraints below |
Enter positive independently established wall failure stress in Pa, wall thickness meters and outside diameter meters. Require thickness/OD<=0.1. Return 2*stress*thickness/OD in Pa as a nominal burst estimate, excluding defects, seam, corrosion and code allowable pressure.
nominalBurstPa=2*failureStressPa*wallThicknessM/outerDiameterM Apply the input ordering, units and branch conditions stated above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the calculated or selected fields below. | object |
| result.value | Numeric result under the formula and output units explained above. | number |
{
"input": {
"callerIndependentActualWallFailureStressPascals": 10,
"actualWallThicknessMeters": 0.1,
"actualOuterDiameterMeters": 1
},
"output": {
"result": {
"value": 2
}
}
}Limitations and assumptions
The calculation uses the supplied observations and model inputs. It does not collect measurements, select a reference population or coefficient, or establish that the model applies to the actual case. The stated branch conditions and output units remain part of the result.
All fields require explicit values. Unexpected fields, wrong types, nonfinite numbers and sparse arrays are rejected. Alignment, bounds and supported-token rules are explained above; extremely large inputs or nonfinite results can also fail. Input errors differ from successful false comparisons, unavailable-domain flags and empty match lists.
Alternative or Complementary methods
Use Plumbing Water Hammer Wave Speed Calculator for a complementary operation: Pressure-wave speed in an elastic pipe depends on fluid compressibility and pipe compliance.
Use Plumbing Pipe Allowable Pressure Calculator for a complementary operation: Allowable pipe pressure depends on a governing standard and material conditions.
References
Similar or alternative tools
- Plumbing Water Hammer Wave Speed Calculator
Pressure-wave speed in an elastic pipe depends on fluid compressibility and pipe compliance.
- Plumbing Pipe Allowable Pressure Calculator
Allowable pipe pressure depends on a governing standard and material conditions.