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Abstract
Standards used in electrofusion welding of polyethylene(PE) pipes, recommends to be carried out at the temperature range between -5oC and +30oC. However, when climatic conditions considered especially in cold countries and emergency situations when the welding process performed at lower ambient temperatures than specified; we need a detailed study about toughness of the weldments. For this purpose, medium density (PE80) pipes were joined with electrofusion welding method at the various environment temperatures (room temperature, 0oC and -30oC) as recieved. The impact resistance of weldments were investigated by Izod impact test and fracture surface inspection was carried out. As a result, the weldments impact resistance was determined to be affected by the ambient temperature.
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