Accurate burst pressure prediction is essential when designing medical tubing, balloon shafts, catheters,
and high-performance extruded products. This tool helps you estimate minimum burst pressure by accounting for
OD, wall thickness, tensile strength, concentricity, ovality, and temperature effects across your application.
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This calculator uses a conservative thin wall pressure vessel model with hoop strength reduction to provide a realistic upper bound for burst performance. The model assumes a mid wall radius and minimum effective wall created by ovality and concentricity inputs.
This tool does not account for viscoelastic deformation, crystallinity shifts, multilayer adhesion, weld lines, strain induced orientation, cooling history variation, or localized defects. Only real measurement verifies actual part performance. LaserLinc systems provide continuous OD, ID, wall, ovality, and concentricity data needed to validate burst behavior.
Burst pressure is calculated using thin wall pressure theory with a mid wall radius and a hoop strength reduction appropriate for polymers.
P = (2 × σhoop × t) ÷ rmid
Temperature effects, ovality, and concentricity are applied to determine minimum effective geometry.
Improve tubing performance with LaserLinc laser and ultrasonic systems for OD, ovality, wall thickness, and concentricity measurement.
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This tool is for reference only. Confirm performance through actual measurement and testing.
Burst pressure represents the maximum internal pressure a tube or catheter can withstand before failure.
It is one of the most critical performance metrics in medical devices, balloon shafts, flexible liners, and
industrial extrusion applications.
This estimator helps you predict theoretical burst performance by accounting for OD, wall thickness, tensile strength,
concentricity, ovality, and temperature effects. This creates a realistic “worst-case” model that aligns with how tubing behaves under stress.
Burst pressure directly depends on a material’s tensile strength and how it changes with temperature. Higher temperatures reduce strength, while material families behave differently under load. Applying the right safety factor ensures your design maintains adequate performance throughout its intended use.
Real tubing is never perfect. Variations in wall thickness, concentricity, and ovality create weak points where failure is more likely. This estimator reduces OD and wall thickness based on your inputs to calculate a realistic minimum geometry for accurate burst prediction.
Enter your tubing dimensions, material properties, optional temperature, and safety factor. The tool automatically calculates the minimum inner diameter, mean radius, adjusted tensile strength, burst pressure, and safe working pressure. All calculations follow thin-wall pressure vessel theory adapted for medical and industrial tubing.
Outer Diameter (OD):
Enter OD in millimeters, inches, or French. OD automatically adjusts for ovality to determine the minimum effective diameter.
Wall Thickness:
Wall thickness is used to calculate the minimum inner diameter. Concentricity reductions are applied to represent the thinnest point in the cross-section.
Material Tensile Strength:
Select a common material or enter a custom value. Tensile strength drives the maximum allowable internal pressure before rupture.
Temperature (optional):
Temperature de-rating adjusts tensile strength based on your material’s behavior under heat.
Safety Factor:
Choose a preset ratio or enter a custom value. Safe working pressure is equal to burst pressure divided by the safety factor.
Adjusted Geometry:
The tool calculates minimum OD, minimum ID, effective wall thickness, and mean radius accounting for ovality and concentricity inputs.
Adjusted Tensile Strength:
Tensile strength is modified using the temperature de-rating factor to reflect realistic material behavior under operating conditions.
Burst Pressure:
Calculated in MPa and psi using thin-wall pressure vessel equations, based on the minimum structural geometry.
Safe Working Pressure:
Burst pressure divided by the selected safety factor. This is the recommended maximum operating pressure.
Each output gives insight into tubing behavior under internal pressure. Understanding these values helps ensure your design meets performance targets and safety standards.
Gauge Advisor Tip:
When validating burst pressure, always pair theoretical estimates with real-world measurement data. LaserLinc laser micrometers and UltraGauge+ ultrasonic systems provide continuous OD, wall, ovality, and concentricity monitoring to help pinpoint weak points before burst testing. This combination delivers the strongest insight into tubing performance and process capability.
Estimating burst pressure is the first step. To validate real-world performance, you need precise, repeatable measurement of OD, wall thickness, ovality, and concentricity. LaserLinc laser micrometers and ultrasonic systems provide continuous, high-accuracy data for medical and industrial tubing—ensuring your burst pressure predictions match reality.
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If you’re still estimating burst pressure using rough rules of thumb or ignoring the impact of wall variation, temperature, or material behavior, you’re leaving risk on the table. Burst pressure validation isn’t just about a number. It’s about confidence in every design, from catheter shafts to industrial tubing.
We’ll help you implement a measurement and validation strategy that ensures accuracy, traceability, and process stability by combining theoretical burst predictions with real-world data from LaserLinc laser and ultrasonic systems. Get the clarity you need across OD, wall thickness, ovality, and concentricity before products reach the field.
