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Appropriate temperature for welding PE p...
Appropriate temperature for welding PE pipe
Appropriate temperature for welding PE pipe and hot melt machine: set heating plate temperature 200 ~ 230 ℃
1. Preparation for welding.
Hot melt welding construction preparation work is as follows:
①Insert the slips consistent with the specifications of the pipe into the rack;
② Prepare sufficient supports to ensure that the pipe to be welded can be at the same height as the center line of the rack and can be easily moved;
③ Set the heating plate temperature 200 ~ 230 ℃;
④ Turn on the power of the welding machine, turn on the heating plate, milling cutter and oil pump switch and test run.
2. Welding.
The welding process is as follows:
Check the pipe and clean the pipe end → tighten the pipe → mill the pipe end with a cutter → check the pipe end misalignment and gap → heat the pipe and observe the minimum curling height → weld and cool the pipe to the specified time → remove the pipe. During the welding process, the operator should refer to the parameters of the welding process card, and if necessary, adjust it according to the weather, ambient temperature and other changes:
① Check whether the specifications and pressure level of the pipe to be welded are correct, and check whether there are knocks, bumps, or scratches on the surface. If the depth of the scar exceeds 10% of the pipe wall thickness, it should be partially excised before use;
② Use soft paper or cloth dipped in alcohol to remove the oil stains or foreign objects at the ends of the two tubes;
③Put the pipe to be welded into the frame slip, so that the length of the two ends protruding is equivalent (as short as possible without affecting the milling and heating, it should be kept at 20 ~ 30mm). The support is held up so that the axis of the pipe is at the same height as the center line of the rack, and then fastened with slips;
④ Place the milling cutter, turn on the power switch of the milling cutter, then close the two ends of the pipe, and apply appropriate pressure until continuous chips appear at both ends (chip thickness is 0.5-10mm, by adjusting the height of the milling blade Adjustable chip thickness), remove the pressure, wait for a while, then retract the movable frame and turn off the cutter power;
⑤ Take out the milling cutter, close the ends of the two pipes, and check the alignment of the two ends (the misalignment of the two ends of the pipe cannot exceed 10% of the wall thickness, which can be improved by adjusting the straightness of the pipe and the elastic slip; the gap between the ends of the pipe can not exceed 0.3mm (below de225mm), 0.5mm (de225mm ~ 400mm), 1mm (above de400mm), if it does not meet the requirements, it should be milled here until it meets the requirements.
⑥After the temperature of the heating plate reaches the set value, put it into the rack and apply the specified pressure until the minimum curling on both sides reaches the specified height, the pressure decreases to the specified value (just keep contact between the two ends of the pipe end and the heating plate. Heat absorption), after the time is up, release the movable frame, quickly remove the heating plate, and then close the two tube ends, the switching time is as short as possible, after cooling to the specified time, release the pressure, loosen the slips, and remove the connected pipe.If you want to know more about it please do not hesitate to contact me. WhatsApp:+86-15966835076
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