I. Basic Parameter Settings
1. Voltage and Current
The normal operating voltage of an electric fusion welder is typically 395±5V, with a current not exceeding 100A. Ensure that the power supply fluctuation does not exceed ±10%.
The constant voltage/constant current mode selection should be based on the pipe fitting marking. For example, Runhu brand welders support multiple welding stages (e.g., 3 stages). The voltage and time for each stage should be adjusted based on the pipe fitting specifications (e.g., 32V - 150s, 40V - 205s, etc.).
2. Temperature Control
Heating plate temperature: PE80 GB standard: 210±10°C, PE100 GB standard: 225±10°C; British standard PE80 requires a more precise temperature (233±3°C).
Ambient temperature: 230°C is recommended in winter (below 0°C), and can be reduced to 205°C in summer (above 30°C). II. Time and Pressure Parameters
1. Welding Time
Calculated by pipe diameter: The national standard for SDR17.6 is pipe diameter/11 x 10 seconds. In summer, calculate wall thickness x 9 seconds, and in winter, calculate x 12 seconds.
Cooling Time: The larger the pipe diameter, the longer the time (e.g., 90mm requires 11 minutes, 315mm requires 35 minutes).
2. Pressure Setting
The national standard uses drag pressure to absorb heat. Example pressure calculation: A 90mm pipe diameter requires 3.15 MPa x cylinder cross-sectional area (e.g., 10 cm² = 0.315 MPa).
Stage-by-Stage Adjustment: Initial pressure 0.15 MPa, reducing to 0.02 MPa after absorption.
III. Operational Procedures and Precautions
1. Input Method
Manually enter parameters or scan the pipe barcode to automatically synchronize parameters (e.g., Runhu E+ Cloud Welding Machine supports mobile Bluetooth connection). For multi-stage welding, the voltage and time must be set for each stage (e.g., 28V - 150s, 38V - 180s, etc.).
2. Quality Inspection
The weld seam must be smooth and free of bubbles, with uniform bead width and no misalignment exceeding 10% of the wall thickness.
A pressure test is recommended to verify the seal.
4. Special Scenarios
Large-diameter pipes: For example, 315mm pipes require an extended cooling time of 35 minutes and an increased pressure gradient.
Fully automatic welding machines: These machines have a built-in parameter library (e.g., the Xionggu A-610) and automatically match the process after entering the pipe diameter.
