208 Name of Operation Description of Operation Notes 5) Cleaning In case any foreign materials are stuck on both internal and external surface of the pipe, remove them with acetone-impregnated gauze. Clean the cementing surfaces. (The external surface of the pipe and internal surface of the socket of the fitting). [Wipe off dust, foreign materials etc. with acetone-impregnated gauze.] Be sure not to cause any secondary contamination. Clean surfaces thoroughly and remove any water, foreign materials etc. if on the surfaces, where solvent is applied, prior to proceeding to the next step. 6) Applying Solvent Cement (Socket of Fitting) Applying the solvent cement on the internal surface of the socket of the fitting. Apply the solvent cement on the surface a little thin and uniformly so that no excess solvent cement flows onto the portion where media contact. 7) Applying Solvent Cement (Pipe) Then, applying the solvent cement on external surface of the pipe from the end to the uideline direction. Select type of solvent cement (#32, #52, 62, #90 & #88) properly depending on Temperature, Nom. Size and Material. Quantity of solvent cement applied on the pipe and on the fitting: Standard Ratio = 7 : 3 Refer to "Cement" Page for the standard quantity of the solvent cement per each joint and by each Nom. Size.