406.7.1.1 Removal from service.
FGC § 406.7.1.1
Where existing gas piping is opened, the section that is opened shall be isolated from the gas supply and the line pressure vented in accordance with Section 406.7.1.3. Where gas piping meeting the criteria of Table 406.7.1.1 is removed from service, the residual fuel gas in the piping shall be displaced with an inert gas. Table 406.7.1.1Size and Length of Piping Nominal Pipe Size (inches)Length of Piping (feet) ≥ 2 1/2 < 3 ≥ 50 ≥ 3 < 4 ≥ 30 ≥ 4 < 6 ≥ 15 ≥ 6 < 8 ≥ 10 ≥ 8 Any length For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
