| 摘要 |
<p>A heat-sealable sleeve (10) for protection and strengthening of head-to-head joints of a pipe (13) of plastic material is made up of two mutually connectable halves (11, 12) for wrapping a pipe. The halves have on the internal face in an intermediate position between the ends of a circumferential groove designed to receive the head-to-head joint of the pipe on which the sleeve is installed. Each half has two longitudinal flanges (17, 18, 19, 20) projecting radially for coupling with and fastening to corresponding flanges of the other half. The union comprises on the internal face zones for electrical thermofusion for adhesion to the pipe connected to outward-facing terminals (25 to 32) for their electrical power supply. Advantageously, the flanges also have mutual thermoadhesion zones by means of electrical power supply through terminals (35, 36).
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