How to install pipe fitting reducer?

　　Pipe fitting reducer is one of the most widely used pipe fittings, which plays a connecting role. The following points should be paid attention to during installation:

　　1. Draw the side projection of the pipe fitting reducer according to the actual size. Including stitching. Each closed wireframe figure is divided into independent graphics by line. Take a pattern and draw it on another piece of paper. Draw two parallel horizontal lines along the height of the pattern and perpendicular to the center line. The length is exactly the circumference of the diameter of the pattern.

　　2. Divide the vertical direction of the drawing equally and mark it. Then draw these bisectors vertically into the expanded rectangle drawn just now. Note that the points on the expanded drawing must correspond to the points on the projection drawing.

　　3. Divide the diagonal lines in the drawing horizontally. And parallel pull to the expanded pattern, and corresponding points. Connecting the intersection points obtained from the expanded sample smoothly is the expanded curve.