The precautions for installing electric fusion fittings cover multiple aspects to ensure welding quality and construction safety.
Here are some key precautions:
Cleaning and Pollution: During the installation process, the inner walls and welding areas of the electric fusion fittings must be kept clean and free from organic matter, pollutants, or other impurities. These impurities may affect the welding quality, leading to weak welding or leakage.
Power supply and voltage: Input a matching power supply according to the requirements of the electric fusion welding machine. The farther the power supply is from the electric fusion welding machine, the larger the wire diameter of the power supply line is required to prevent undervoltage from affecting the welding quality.
When installing and welding large-diameter electric fusion fittings, try to use a stable power source to reduce problems such as detachment, water leakage, unsatisfactory welding effect, and virtual welding caused by unstable voltage during pressure testing of electric fusion fittings.
Environment and temperature: The area where electric melting pipes are buried should be located below the frozen soil layer to prevent damage to the pipeline due to frozen soil expansion.
During installation and welding, the pipeline should not be soaked in water to prevent moisture from affecting the welding quality.
When working in an environment with a large temperature difference between day and night, stabilizers or other tools should be used to fix the pipes on both sides of the electric melting pipe fittings to prevent the welding quality from being affected by thermal expansion and contraction.
When the temperature is low, insulation work should be done well to prevent welding parts from cracking due to low temperature.
When the temperature is too high, such as when the on-site temperature exceeds 30 ℃, and there is a risk of spraying or smoking during the welding of electric fusion fittings, please reduce the last welding time by 10% to ensure welding quality.
Welding and Cooling: During the welding process, operators must stay away from the welded fittings until the welding is completed and cooled for 30 seconds before approaching to prevent burns or electric shock.
During the cooling process of the pipe, the pipe and fittings cannot be moved to avoid affecting the firmness of the welding area.
Fixed and compensated: During pipeline installation, elbows, tee fittings, etc. must be reinforced with supports or fixed with brackets, and appropriate pipeline compensation must be done to prevent welding quality and service life from being affected by pipeline deformation.
Welding time adjustment: According to the temperature and working voltage changes in the on-site environment, the welding time can be appropriately compensated during welding to ensure welding quality.
In summary, the installation of electric melting pipe fittings requires attention to multiple aspects, including cleaning and pollution, power and voltage, environment and temperature, welding and cooling, fixing and compensation, and welding time adjustment. Only by strictly following these precautions can the installation quality and construction safety of electric fusion fittings be ensured.