API 41 : 1995

FOREWORD
0. INTRODUCTION
1. SCOPE
2. REFERENCES
3. PREPARATION OF THE PRIME MOVER
3.1 Prime Mover Configuration
4. PREPARATION OF THE DRIVE TRAIN
4.1 Drive Train Configuration
5. PREPARATION OF THE PUMP
5.1 Pump
5.2 Power End
5.3 Fluid End
6. PREPARATION AND OPERATION OF PUMP SUCTION
     PRESSURIZER SYSTEM
6.1 Pressurized Suction System
7. PREPARATION AND OPERATION OF MEASURING EQUIPMENT
7.1 Measuring Equipment Specifications - Recommended
       Method
7.1.1 Test Stand
7.1.2. Volume Measuring System - Recommended Method
7.1.3 Discharge Pressure Measuring System -
         Recommended Method
7.1.4 Suction Pressure Measuring System -
         Recommended Method
7.1.5 Fluid Temperature Measuring System -
         Recommended Method
7.1.6 Diesel Engine Inlet Air Temperature Measure-
         ment System - Recommended Method
7.1.7 Barometric Pressure Measuring System -
         Recommended Method
7.2 Accuracy - Recommended Method
7.2.1 Volume - Recommended Method
7.2.2 Discharge Pressure - Recommended Method
7.2.3 Suction Pressure or Vacuum - Recommended
         Method
7.2.4 Temperature Measuring Device - Recommended
         Method
7.2.5 Barometric Pressure - Recommended Method
7.2.6 Calibration - Recommended Method
7.3 Performance Test Data - Recommended Method
7.3.1 Data to be Recorded
7.4 Measuring Equipment Specifications - Alternate
       Method
7.4.1 Volume Measuring System - Alternate Method
7.4.2 Discharge Pressure Measuring System - Alternate
         Method
7.4.3 Suction Pressure Measuring System - Alternate
         Method
7.4.4. Fluid Temperature Measuring System - Alternate
         Method
7.4.5 Engine Inlet Air Temperature Measuring System-
         Alternate Method
7.4.6 Barometric Pressure Measuring System -
         Alternate Method
7.5 Accuracy - Alternate Method
7.5.1 Volume - Alternate Method
7.5.2 Discharge Pressure - Alternate Method
7.5.3 Pressure Indicating Device Chart
7.5.4 Suction Pressure or Vacuum - Alternate Method
7.5.5 Thermometer - Alternate Method
7.5.6 Barometric Pressure - Alternate Method
7.5.7 Calibration - Alternate Method
7.6 Performance Test Data
7.6.1 Data to be Recorded - Alternate Method
7.7 Calculation of Hydraulic Horsepower
7.7.1 Correction Factor for Diesel Engines
7.7.2 Hydraulic Horsepower
7.8 Test Procedure
7.8.1 Test Conditions
7.8.2 Actual Test Run - Recommended Method
7.8.3 Actual Test Run - Alternate Method
7.8.4 Length of Run Per Point - Alternate Method
7.8.5 Runs to be Made
7.8.6 Test Points
7.8.6.1 Straight Transmission and Torque Converter
           Lockup Drives
7.8.6.2 Torque Converter Drives
7.8.6.3 Additional Test Points
8. PREPARATION OF PERFORMANCE CURVES
8.1 Curve Form
8.1.1 Coordinates
8.1.2 Scale
8.1.3 Curve Information
8.2 Test Data
9. CERTIFICATION OF PERFORMANCE CURVES
Figures
1. Performance Curve, Metric (SI) Units
2. Performance Curve, English Units
Tables
1. Selection of Pressure Indicating Device
2. Pressure Indicating Device Chart

Describes method for hydraulic-horsepower rating of pumping units used in well cementing and fracturing services. Applies to any type of pumping unit regardless of engines, transmissions and fracturing pumps.