Hydrostatic Test Pressure Calculator

Professional pipeline integrity testing per API 1110 & ASME codes

API 1110ASME B31.3/B31.4/B31.8DOT 192

Test Code & Standards

Test Code/Standard

Unit System

Pipeline Properties

Outside Diameter (inches)

Wall Thickness (inches)

Material Grade

SMYS (psi)

SMTS (psi) - Optional

Joint Efficiency (0-1)

1.0 = Seamless, 0.85 = ERW, 0.95-1.0 = DSAW

Temperature Derating Factor (0-1)

Reduce for elevated temperatures per code

Test Conditions

Operating Pressure / MAOP (psi)

Test Temperature (°F)

Test Medium

Test Duration (hours)

Elevation Difference (feet)

Positive for uphill test, negative for downhill

Test Medium Specific Gravity

Water = 1.0, Air ≈ 0.001

Calculation Results

Enter pipeline properties and test conditions to calculate

Selected Code Information

API 1110

Pressure Testing of Steel Pipelines

Test pressure = max(1.25×MAOP, 1.10×σop/SMYS×SMYS)