Required tools and apparatus that will be needed for pipe jointing.
When the material is heated from polypropylene to 260 degrees centigrade, its polymer chains are combined. This means that they can create a monolithic structure due to the acceleration of the diffusion of polypropylene.
You probably already guessed what's next. To make a high-quality pipe joint, you need to heat its elements to a temperature of at least 250 degrees C. Once the parts are warmed up, they must be docked. The cooled polypropylene will look like a conventional diffusion seam. This is due to the following process: the docked pipe elements, at the molecular level, penetrate each other in layers. The technical soldering also takes place in the form of pressing the heated tube into a coupling, which is also heated. 
Docking of a polypropylene pipeline at the ends - an economical soldering process. Using this method, you can be sure that your pipeline will not change its dimensions, because there will be no thickening at the place where the joint occurs.
However, docking at the ends has its disadvantage: such a seam can not cope with systems in which high pressure is provided. This is quite logical, because the area of contact materials at the junction is almost the same as the walls of the pipes themselves. That is why, the soldering of the pipe-coupling type will be much more effective.
In this case, the material contact occurs over the entire area of the coupling. This method is reliable and proven, so do not skimp on soldering on this technology.
In order to start soldering polypropylene pipes, stock up on the marking tools. Their list includes: a marker, an ordinary tape measure and calipers. All this, you will need in order to measure the required length of pipe from the bay and mark the desired depth, where the pipe will be submerged.
Tools that are designed to cut a polypropylene pipeline are a little more expensive. A set of tools consists of: a knife, a pipe cutter, a calibrator and other tools. All this is useful to you, to separate the measured segment from the bay and cut the butt. Naturally, then you will need to process the place where the slice was made. 
Well, the latest tools will be needed directly for the soldering. You will need: a soldering iron with a special nozzle, and a stand to it.
Perform the soldering process and use the above sets only in the order that was indicated earlier.
More detailed description of the technology for soldering pipes. Step One - Measurements.
And so, we start with the measurements. This is a very delicate process, as it is necessary to foresee the future result of the work done, taking into account the coefficient of linear expansion of polypropylene. Calculate the temperature deformation, then subtract the result from the length of the measuring segment. 
Step two - cutting.
Now, turn to cutting. When the length is defined, we recall the rule "measure ten times, cut once".If you are sure of your calculations, take a pipe cutter. It is very important to use this tool, as it allows cutting the pipe perpendicular to the central axis of the pipe. Due to the clean and correct cut, you can count on high-quality soldering.
Place a slice in the caliber to align the section shape. Finish the cut with a face-wiper, to calibrate the shape of the butt and remove the barbs.
Now, you can insert the pipe directly into the coupling itself, while on the outside, mark the depth of entry. This label will serve as a guide during the docking process.
Step three - soldering
We go to the most complicated process - soldering. Collect and prepare the iron for soldering. For this, take the necessary nozzle and install it on the heating element. Place the soldering iron on the stand and connect it to the mains. When it warms up to the desired temperature, you will have to gently put the clutch and pipe on the hot nozzles. Keep them not required for long, about 4-7 seconds. Take into account the thickness of the pipe and its diameter.
When the parts warm up, remove them from the attachments( always wear gloves!).Immerse the pipe in the coupling to the already installed depth and fix the part within 30 seconds. During this time, the polymer chains will unite and form a seam. 
The most important thing is, do not twist and raise the details, so as not to disrupt the spike process.
That's all. Set aside the finished structure and proceed to the process again to join the second branch.
