Related Manuals for McElroy 824
Summarization of Contents
Hydraulic Butt Fusion Machine Procedure
Principles and Operations
Details the principle of heat fusion and lists key operational steps like cleaning, clamping, facing, alignment, heating, joining, and holding.
Joining Different Wall Thicknesses
Outlines criteria for joining pipes with varying wall thicknesses, specifying diameter and thickness difference limits.
Hydraulic Manifold Block
Manifold Block Components
Describes the carriage control valve, pressure gauge, selector valve, and pressure reducing valves on the manifold block.
Install Clamping Inserts
Explains how to select and install appropriate clamping inserts for the pipe being fused.
Check Hydraulic Pressure
Setting and Recording Pressure
Details how to set facing, heating, and fusion pressures, including calculating drag pressure.
Fusion Pressure Calculator
Interfacial Pressure and Usage
Defines Interfacial Pressure (IFP) and provides steps for using the Fusion Pressure Calculator.
Determining Fusion Pressure Formula
Explains variable definitions and presents the formula for calculating gauge pressure.
Determining Fusion Pressure (Continued)
Total Effective Piston Area (TEPA) Table
Provides a table of TEPA values for different fusion machine models and cylinder types.
Loading Pipe Into Machine
Pipe Loading Procedure
Details how to clean pipe ends, insert them into jaws, adjust protrusion, and tighten clamp knobs.
Facing The Pipe
Facing Procedure Steps
Outlines the steps for pivoting the facer, moving the carriage, opening the valve, and adjusting pressure for cutting.
Remove Facer
Facer Removal and Alignment Check
Describes pivoting the facer out, removing chips, moving the carriage, checking alignment, and tightening clamps.
Position Carriage For Heater Insertion
Heater Insertion Positioning
Instructs to move the carriage to the right to create a gap for heater insertion.
Check Heater Temperature
Heater Temperature Verification
Specifies required heater surface temperatures and how to use the dial thermometer.
Select the Fusion Position
Selector Valve for Fusion
Guides to move the selector valve handle to the fusing position for the procedure.
Inserting Heater
Heater Insertion Safety and Preparation
Covers safety warnings, cleaning heater surfaces, checking for damage, and verifying temperature before insertion.
Heating The Pipe
Heating Process Steps
Details moving the carriage, seating pipe ends against the heater, and adjusting pressure for heating.
Fusing The Pipe
Fusing Procedure and Inspection
Explains fusing steps, heater removal, inspecting melt pattern, and applying fusion pressure.
Unacceptable Concave Melt Appearance
Causes and Notice for Concave Melt
Explains that heating under pressure causes concave melt and advises against continuing if it occurs.
Cooling Of The Fusion Joint
Cooling Methods and Times
Details three cooling methods (touch, timing, pyrometer) and provides cooling time guidelines based on wall thickness.
Opening Movable Jaws
Movable Jaw Opening Procedure
Describes shifting the carriage to neutral, loosening knobs, and moving the carriage to open the jaws.
Opening Fixed Jaws
Fixed Jaw Opening Procedure
Simple instruction to open the fixed jaws.
Raise Pipe
Post-Fusion Pipe Handling
Guides to raise the joined pipe using lifts and prepare for the next fusion, with a note on troubleshooting.
Butt Fusion Joint Troubleshooting Guide
Inspecting the Fusion Joint
Provides guidelines for inspecting fusion joints, focusing on bead size, shape, and absence of defects like cracks.
Butt Fusion Joint Troubleshooting Guide (Continued)
Troubleshooting Attributing Factors
Lists common joint defects and their probable attributing factors, such as misalignment, heating issues, or contamination.
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