7. Istruzioni per una saldatura di tasca corretta

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9. Hole reparing In case of accidental drilling it is possible to repair the pipe as follows: 1. As first, adequate the hole to the hole memder dimension. They are available in 7 mm and 11 mm, respectively repairing an hole of 6 mm and 10 mm. Take the hole to this dimensions. 2. Proceed to the normal fusion, heating the two part for 5 sec. positioning in relation to the thickness of the pipe, the ogive in brass. This avoid to waste the pipe. 3. Joint the two parts and keep the repairing part for a while until cool. 4. Wait after the cooling time befor cutting the part in excess. 24
10. Instruction for the welding saddle Phase of preparation of welding Mount the saddle welding tool to the manual welding machine. Once the tools are positioned, check the surface temperature, which must be in the range of 253°C and 274 °C. This operation may be performed with the tempil stick. Chek the surface to be welded, which have to be clean and dry . Scrap the same area with a blade (picture1) and just before welding degrease by light solvent and lint free cloth. In case of PPR-ALU pipe proceed taking away the aluminium film. Welding phase Heat up the pipe with the tools for 30 seconds and then further 20 sec. heat up the saddle, for a total of 50 sec. for the pipe. Make a light pressure with the saddle on the tools. Make sure all the surface have to be in contact with the heating tool. Jointing process After finishing the heating phase remove the welding unit, place the welding saddle into the pipe. Fix under a light pressure avoiding rotation for an additional 30 sec. Drill out the pipe at the welding point with a commercial spiral drill bit (picture 4). If necessary clean the hole of chips which may remain. Caution is to be taken in drilling the correct depth and use the correct diameter see table 1. The system may be exposed to full load after 30 minutes the last welding. Please find in page 26 the welding parameters. 25
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Page 3: 8. Electrofusion The welding can al

7. Istruzioni per una saldatura di tasca corretta

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