Frequently Asked Questions

Does ACPT Assess AC and DC Transit System Interference?

AC Power Tool (ACPT) Validation

ACPT and ACPTGIS versus PRCI AC Mitigation Angles

ACPT GIS Steady State – Creating Section Lines

ACPT – METHODS OF SOIL RESISTIVITY (Barnes Layers)

Fault Current Distribution X/R versus Combined Magnitude

Why the differences in All versus the Closest Tower

Estimating AC Voltages and Maximum Current on Power Lines

Restrained versus Unrestrained Pipe (Difference in Gas vs. Liquid)

Maximum Span Length rev1

What is the model used for Thrust at Blow-Off

HDD Power Tool Questions

HDD – Version Capability Matrix

HDDPT Process to Import KML/KMZ and Shape Files

HDD PowerTool: How to Calculate a Compound Angle

Update on the Latest Technical Capabilities of the HDDPT

Combined Stresses and Limitations for Both Liquid & Gas HDD

Hydraulic Fracture Analysis Geological Layers Data Input

Crossings – Live Loads

Validation checks in place for API 1102 – Pipeline Crossing Railroad

Validation checks in place for API 1102 – Pipeline Crossing Highway

Track Load – Interpolation Method (for Influence Coefficient)

API 1102 Uncased Crossing 10 Foot Limit Understanding

Surface Load Mitigation Measures – Best Practice

Difference between “Operating Weight” in Track Load Analysis and “concentrated surface load” in Wheel Load

Determining Trench Width for Crossings

Combined Stress for Wheel Load and Track Load

Timber Mats in Crossing

Redistributing Wheel and Track Loads (Pavement and Other Materials)

Pipeline Crossings – External Loads and Vehicles over Buried Pipelines “Maximum Allowable Combined Stress”

Applicability of Class Location for Liquid Lines? What is the design factor used for Liquid Pipeline Operation?

Loading Requirements for API 1102 E-80 and E-90 Railroad Crossings

Cased Crossings

Weld Safety Factors

Impact Factor in CEPA Model

Understanding Impact Factors in Pipeline Design (CEPA)

Blasting Calculations Used Around Pipelines

Estimating Equivalent Release Ratio

RSTRENG Tips

RSTRENG (Effective Area) Calculations

Preventative and Corrective Measures to Control Corrosion Pitting

Estimating Internal Corrosion Rates

Estimating External Corrosion Rates

ASME B31G Original/Modified and RSTRENG Overview

Buoyancy Analysis for Concrete Coating and Weight Spacing

Validation check: Reinforcement of Welded Branch Connection – ASME B31.8

Orifice Coefficient for Hot Tap Sizing

How is Required Area calculated for Branched Weld Connection?

Natural Gas Purging Calculations

What are the differences between the Semiempirical Blowdown calculation and the AGA Blowdown calculation?

PRCI Hot Tap results not showing on reports

PRCI Hot Tap Hardness value for Multipass Welds

PRCI Hot Tap Hardness Model

How can we account for Sleeve/Fitting material? Does the analysis assumes the same composition for both header and fitting? Is so, is accounting for the difference as simple as inputting the composition with the highest CE value?

Does the model consider the composition entered in the “Max Hardness” area for both the pipe and the sleeve?

Validation checks enforce in PRCI Hot Tap Model

Clarification on Heat input and Arc energy in Hot Tap Model

Natural Gas Purging Calculations

Erosional Velocity

Sonic Velocity