Views: 61 Author: Site Editor Publish Time: 2017-08-21 Origin: Site
Mainly connect way of PPR pipes is hot melt. If hot connect was operated in a wrong way, though the pipe is a better one, the quality of pipe may can't reach the goal. In order to ensure the quality, must use PPR welding machine which equipment with factory products first. PPR welding machine’s temperature and time should be according the standard. PPR pipes’ connect way connect pipes and fittings by once. So when equip the water branch in to the wall, we should consider the requirement of the design and fact of the work place together. If the PPR pipes are buried underground, the connection of the PPR pipes can’t be too much.
Before connecting, clean the PPR pipes and adapter, like oil and other things. Furthermore, the PPR pipes in fittings can’t be long, the connect place of the PPR pipes should be average, otherwise it have space so that can’t be connect well. In the future, the connection of the PPR pipes may leak, it should be reconnected at once.
Heat two parts until the suite temperature, cooling enough, then use. The temperature of PPR pipes is 20℃ lower than PPB, so it is better to connect in a low temperature place.
Hot melt standard time
PIPE outside dia Φmm | hot melt deep (mm) | min heat time sec. | connect time sec.(max) | min cooling time Minutes |
16 | 13 | 5 | 4 | 2 |
20 | 14 | 5 | 4 | 2 |
25 | 15 | 7 | 4 | 2 |
32 | 16 | 8 | 6 | 4 |
40 | 18 | 12 | 6 | 4 |
50 | 20 | 18 | 6 | 4 |
63 | 24 | 24 | 8 | 6 |
75 | 26 | 30 | 8 | 6 |
90 | 29 | 40 | 8 | 6 |
110 | 32.5 | 50 | 10 | 8 |
All of the important technical is electric melt by the PPR welding machine, now detailed introduce notice of electric melt below.
Electric melt: First, set electric melt fitting on PPR pipes, then use professional PPT welding machine according the set parameter（time, voltage）to give electric melt fitting electricity, make the inside of electric melt fitting and the outside of pipe insert end melt. Cooling the fitting and the pipe, then melt together. The feature of this kind of the PPR welding machine is speed, convenient, good quality, and small external influence. But the price is several times expensive even more (smaller of diameter, more expensive of it). In general, it is suitable with big diameter pipe connect.
1. Electric melt connect procedure (process) by the PPR welding machine: check → cut → clean connect end → insert → check → electric welding → cooling.
(1) Cut: The connect end should be perpendicular cut to ensure enough melt area. Usually cut tool is rotary cutter, saw bow, plastic pipe scissors etc. Do not allow high temperature to avoid the deformation of pipe end.
(2) Clean the connect end and insert deep line: Use fine sandpaper, scraper scraping the surface of the pipe oxide layer. Use clean cotton clean the connect side of pipe and fitting. Sign the insert deep line.
(3) Insert: Insert the electric fitting into pipe until the required deep, connect together with welding machine.
(4) Check: Adjust pipe’s or fitting’s position on a line to avoid not firmly due to miss connect or not sealed.
(5) Electric welding by the PPR welding machine: Heat time with electric and voltage should meet the factory regulation of the electric melt welding machine and electric melt fitting, in order to connect in a best supply voltage and best heat time situation.
(6) Cooling: Due to PE pipe can reach max patience strength only after cooling to room temperature. During cooling, external force will make fitting and pipe in two lines and effect welding quality. So, cannot move connection or produce external force during cooling.
2. Electric melt saddle connection: This way of using PPR welding machine only can be used on connect branch with body or water leak caused by small area pipe burst.
