⚠️ 1. Repair Methods for Electric Fusion Tees/Elbows
For leaks, cracks, or a difference in outer diameter between the electric fusion fitting and the pipe, standard tee and elbow repair clamps cannot be installed.
Solution 1: Purchase a clamp from Baoshuo to cover the leak. Based on the pipe's pressure requirements, for example, for a 2.0 MPa pipe, use a 2.0 MPa pipe repair clamp. For high-pressure tees and elbow repair clamps, the requirements are typically higher than for straight pipes.

Φ20,Φ25,Φ32,Φ40,Φ50,Φ63,Φ75,Φ90,Φ110,Φ125,Φ140,Φ160,Φ180,Φ200,Φ225,Φ250,Φ280,Φ315,Φ355,Φ400,Φ450,Φ500,Φ560,Φ630,Φ710,Φ800,Φ900,Φ1000,Φ1100,Φ1200,Φ1400,Φ1600
Useful Scenario: When space is limited and pipe replacement is impossible.
Solution 2: After shutting off the water supply and draining the pipe, repair the crack with a hot-melt welding gun (technical expertise is required, as secondary leaks are more likely. For pipes with high liquid volumes, shutting off the water supply can result in greater losses. Pipe repair clamps are recommended, as they are simple to install).

2.0 MPa electric fusion tee elbow leak repair clamp,

2.0 MPa electric fusion tee/elbow repair clamp Φ200,

2.0 MPa electric fusion tee/elbow repair clamp Φ225,

2.0 MPa electric fusion tee/elbow repair clamp Φ315,

2.0 MPa electric fusion tee/elbow repair clamp Φ400,

2.0 MPa electric fusion tee/elbow repair clamp Φ500,

2.0 MPa electric fusion tee/elbow repair clamp Φ560,

2.0 MPa electric fusion tee/elbow repair clamp Φ630

🔧 2. Core Causes of High-Voltage Electric Fusion Pipe Leakage
1. Construction Process Defects (Accounting for Over 80% of Leaks)
- Axial Misalignment: Pipe and fitting misalignment >2% causes uneven flow of molten PE, leading to resistance wire displacement and local overheating, resulting in vaporization voids (through-hole channels).
- Incomplete Oxide Layer Removal: The high melting point of the oxide layer on the pipe surface hinders PE fusion, resulting in cold welds (which may pass pressure tests in the short term but fall off due to soil pressure/vibration during operation).
- Voltage and Time Outages:
- Voltage < 39V → Insufficient Heat → Cold Welds;
- Voltage > 40V or prolonged operation → Local Temperature > 240°C → PE vaporization → Holes after cooling.

2. Environmental and Equipment Factors
- Improper Cooling: Exposure to water or external forces after welding results in inadequate internal stress release.
- Abnormal welding machine output: The power cord is too long (>50 meters), causing a voltage drop, or the welder has not been regularly calibrated (the standard requires 12 months/2000 welds).
- Low temperature/humid working conditions: Failure to implement protective measures can affect the fusion process.

3. Material and Design Hazards
- Limitations of the electric fusion process: In hot water systems, molecular motion exacerbates the "cold weld" gap of PE-RT II pipe, widening it, leading to leakage after 2-3 years (butt fusion is more reliable).
- Mismatched fittings and pipe materials: Components with different SDR series or significant wall thickness differences are not processed during welding.

> Note: Leaks involving gas pipelines must be repaired by shutting down the gas supply; operating under pressure is strictly prohibited!
💎 Summary
The main causes of leaks in high-voltage electric fusion pipes are cold welds, holes, and axial misalignment. Repairs should be tailored to the severity of the leak: Minor leaks can be treated with glue injection or repair welding, while severe failures require fitting replacement and strict adherence to process specifications. Prevention requires strengthened welding machine management and environmental control, and the preferred butt fusion process in hot water systems. Be sure to perform a 24-hour pressure test after repair and record the weld parameters for traceability.