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E-25 <br /> Page 1 <br /> 1.0 SCOPE <br /> 1.1 This procedure covers the field application of cold applied tape to <br /> uncoated pipe, gauge lines, welded joints, fittings, and irregular- <br /> shaped appurtenances on tape, asphalt, somastic, or plastic coated <br /> pipelines. <br /> 1.2 The procedure describes the preparation of the pipe or fitting, and <br /> the application of primer and tape. <br /> 2.0 PREPARATION OF SURFACE <br /> 2.1 Prior to welding a joint, the wrap should be trimmed back <br /> approximately S" to 6" from the end of the pipe. Approximately 12" <br /> of wrap should be removed when installing a service tee or extending <br /> laterals. The coating should be cleaned from the pipe for about 5" <br /> to 6" in all directions from the intended welding area. The outer <br /> wrap on tape wrapped pipe should be removed an additional distance <br /> equal to the width of the tape being applied. <br /> 2.2 The end of the wrap should be square cut. The wrap at this point <br /> must be well bonded and of normal thickness. The edges of somastic <br /> coating should be tapered for at least one tape width from the cut <br /> end. The surface of the asphalt wrap or plastic inner wrap must be <br /> free of outer wrap, plastic or *Kraft paper, whitewash, mica flakes, <br /> dirt, and other material not providing a good bonding surface for <br /> I the primer and tape. <br /> 2.3 All bare steel shall be free of dust, dirt, grease, oil, and other <br /> foreign matter. Practical removal can be done by either power wire <br /> brushing or hand wire brushing. Grease and oil can be removed by <br /> use of a solvent that leaves no oily or dusty film remaining on the <br /> steel surface. <br /> 2.4 welds shall be cleaned of all welding slag. splatter, and scale. <br /> Sharp edges or burrs shall be removed by grinding or filing. <br /> 2.5 Weld shall be no more than "warm to the touch" prior to <br /> priming and taping. �y°ftss�eM� <br /> I. r�l`� <br /> 2.6 Moisture, if present, shall be removed prior to priming <br /> and taping. <br /> ' Jp 41fCHl,H1GP� S <br /> r <br /> �fF Jh•C t.Ltt Jih <br /> APPROVED BY Rc Q,�d�d Atta r h I - Daj ,�H P In-14 X P4r 4 4 BFO CJT <br /> li <br /> tt REY. HATE DE5CRIKTION GH BtiYlt CHH. 5UPv_ APVD. <br /> PIPING - DATA SHEET SIM <br /> S U PY. D4V'� Li 5T <br /> FIELD WRAPPDszttING WITH COLD APPLIED TAPE Psos 0845/1 <br /> HKo. GAS STANDARD Supso By <br /> SHEET NQ1 of 0 SHEET <br /> 0,K. PACIFIC GAS AND >ELE086 <br /> GTRIC COMPANY QflA> �U�&EA <br /> DATE SCALE <br /> nFR086509 6 <br /> i/23/7fi MAN FK�NUSCO. CuONL^ <br /> MICROFILM <br />