207 �W. Solvent Welding Procedures Name of Operation Description of Operation Notes 1) Cutting of Pipe Winding the tape around the pipe at right angle to the central axis of the pipe, and draw a cutting line along the tape with the felt-tipped pen. Cut the pipe along the cutting line. It is necessary for cutting the pipe at right angle to the central axis of the pipe and also without irregularity. 2) Chamfering (Beveling) Chamfer the edge of outer surface (at the end of the pipe to be inserted) appropriately in a small R. Be sure to keep chips out both inside and outside the pipe. 3) Confirming Insertion Length (a) Insert the pipe lightly into the socket of the fitting and mark a zero point (Lo : from the end of pipe). Confirm that Lo is within a range of 1/3 - 2/3 of total socket-length (socket-depth) (Ls). For the size of 40A and below: go next step. 4) Confirming of Insertion Length (b) Measure the socket-length and draw the guide line (L) on the pipe with the felt-tipped pen. For the size of 13A to 40A, L is same as Ls. L = Ls For the size of 50A and above, please add following figures (Li) on the Lo. L = Lo + Li Length to be added on Lo. Size 13 16 20 25 30 40 Ls 26 30 35 40 44 55 Size 50 65 75 100 125 150 Ls 63 61 64 84 104 132 Socket-Length of TS Fittings Unit: mm Size 50 65 75 100 125 150 Li 20 20 25 30 35 45 Unit: mm