You will need
- - a sheet of paper;
- - basin with water;
- - Mel;
- - masking tape;
- - Cerno;
- the computer program for the compilation of the scan of the pipe;
- - scissors;
- - Scotch;
- - flame equipment;
- - welding machine;
- - hacksaw;
- the pipe cutter;
- - Bulgarian.
If necessary, cut the pipe at an angle of 45, take a square sheet of paper, fold it diagonally and wrap it in the pipe so that the ends of the diagonals was found. The short side will indicate the line of cut at 45⁰, draw this line with chalk or procardia Kern.
If the pipe is small, and you need to get a certain angle, take a basin with water and dip the pipe at the desired slope. Slope calculate in advance. The border of wet and dry metal will show you the line of the cut, draw around it with chalk or protsarapat a sharp object.
To determine the line of the cut pipe, use a narrow masking tape. This method is especially useful when the tube is long, and cutting it should be in the middle. Stick the tape to the desired angle, it can easily be moved and removed after cutting. To be sure that the tape went smoothly, wrap the pipe 2 or 3 times.
To determine the exact angle of the cut, try using the drafting program scans the pipes or in the usual program of preparation of drawings, for example, in Corel Draw. To do this, download the program and draw the pattern, putting the circumference (diameter multiplied by PI) and the desired angle. If you do not have this program, make the scan yourself using OST 38-43-81.
When the drawing is ready, print it on your printer (if necessary on several sheets), cut out, glue and tape. Then attach the pipe and draw around it with chalk or draw a cone.
Marking the cut line, saw him on the tube. If possible, use lathe, it is possible to obtain a sufficiently smooth edge. To cut the pipe exactly flame equipment or conventional welding, it is necessary to be very experienced welder.
For cutting large amount of pipes buy pipe cutter or take the grinder. In an extreme case, try to cut the pipe manually with a regular hacksaw.