Abs Pipes Pressure Ratings

Overview

Engineering reference data for Abs Pipes Pressure Ratings in piping systems.

Key Formulas

Continuity

$A_1 v_1 = A_2 v_2$

Mass conservation in pipe flow.

Pressure Drop

$\Delta P = f \frac{L}{D} \frac{\rho v^2}{2}$

Darcy-Weisbach equation.

Pipe Area

$A = \frac{\pi D^2}{4}$

Cross-sectional area of a pipe.

Variables

ABS Material Designations

ABS (Acrylonitrile Butadiene Styrene) pipes are classified by material designation, which determines their hydrostatic design stress and pressure capabilities.

Pressure Rating Conditions

All pressure ratings for ABS pipes are specified at 23°C (73°F). Pressure ratings decrease as temperature increases. The design stress values shown represent the long-term hydrostatic design stress (HDS) for each material classification.

Schedule Differences

ABS pipes are available in two primary schedules:

• *Schedule 40 — Standard wall thickness for general applications
• *Schedule 80 — Thicker wall for higher pressure applications

Note: Threaded connections (designated as "thr") may have reduced pressure ratings compared to solvent-welded joints.

References

• Original Source

ABS Material Comparison Table

The following table summarizes the key properties of common ABS material designations for pipe applications, as referenced in pressure rating data:

Pressure Rating Temperature Reference

The standard water pressure ratings for ABS pipes (e.g., Schedule 40 and Schedule 80) are specified at a reference temperature of 23°C (73°F). Performance ratings must be derated for applications at higher temperatures.

Threaded Pipe Note

Pressure rating charts for ABS pipes may denote threaded pipe ends with the abbreviation "thr". It is critical to verify that the pressure rating accounts for the stress concentration introduced by threading.