E- 16Cutting/Flaring the PipesConnect the pipe within 50m and cutting pieces will not be gone intothe pipe as being clean to pipe section.1 Make sure that you have the required tools available(pipe cutter, reamer, flaring tool and pipe holder).2 If you wish to shorten the pipes, cut it with a pipe cutter, taking care toensure that the cut edge remains at a 90° angle with the side of thepipe. Refer to the illustrations below for examples of edges cut correctlyand incorrectly.90OOblique Rough Burr3 To prevent any gas from leaking out, remove all burrs at the cut edge ofthe pipe, using a reamer.4 Slide a flare nut on to the pipe and modify the flare.Outer Diameter (D) Depth (A)6.35 mm (1/4") 1.3mm9.52 mm (3/8") 1.8mm12.70 mm (1/2") 2.0mm15.88 mm (5/8") 2.2mm19.05 mm (3/4") 2.2mm22.23 mm (7/8") 2.2mm5 Check that the flaring is correct, referring to the illustrations below forexamples of incorrect flaring.Inclined Damaged Surface Cracked Uneven Thickness6 Align the pipes and tighten the flare nuts first manually and then witha torque wrench, applying the following torque.In case of welding the pipe, you must weld with nitrogen gas blowing.CAUTIONOuter Diameter Torque (kgf•cm)6.35 mm (1/4") 140~170 kgf•cm9.52 mm (3/8") 250~280kgf•cm12.70 mm (1/2") 380~420kgf•cm15.88 mm (5/8") 440~480kgf•cm19.05 mm (3/4") 990~1210kgf•cm22.23 mm (7/8") 990~1210kgf•cmDB98-27157A(1)_E.indd 16 2007-1-23 13:06:44