B -Metallic Area 1. Class If the and the 3 or 4 gathering MAOP location. line is in produces Area 2. An Area 2(b) or a hoop area within a 2(c), the stress of Class 2 additional less than location the lengths of 20 operator line extend percent of determines upstream SMYS. If by using any and the stress of the downstream level is following from the unknown, three area to a an methods: point where operator the line is at (a) A 2 must least 150 location. determine feet (45.7 (b) An area the stress m) from the extending level nearest 150 feet according dwelling in to the (45.7 m) the area. applicable However, if on each provisions a cluster of side of the in subpart dwellings in centerline C of this Area 2 (b) of any part. or 2(c) continuous qualifies a 1 mile (1.6 metallic line as Type km) of and the B, the Type pipeline MAOP is B and 125 psig classification (862 kPa) including ends 150 or less. feet (45.7 more than m) from the 10 but nearest fewer than dwelling in 46 the cluster. dwellings. (c) An area extending 150 feet (45.7 m) on each side of the centerline of any continuous 1000 feet (305 m) of pipeline and including 5
B -Metallic and the MAOP produces a hoop stress of less than 20 percent of SMYS. If the stress level is unknown, an operator must determine the stress level according to the applicable provisions in subpart C of this part. and the MAOP is 125 psig (862 kPa) or less. Area 1. Class 3 or 4 location. Area 2. An area within a Class 2 location the operator determines by using any of the following three methods: (a) A 2 location. (b) An area extending 150 feet (45.7 m) on each side of the centerline of any continuous 1 mile (1.6 km) of pipeline and including more than 10 but fewer than 46 dwellings. (c) An area extending 150 feet (45.7 m) on each side of the centerline of any continuous 1000 feet (305 m) of pipeline and including 5 If the gathering line is in Area 2(b) or 2(c), the additional lengths of line extend upstream and downstream from the area to a point where the line is at least 150 feet (45.7 m) from the nearest dwelling in the area. However, if a cluster of dwellings in Area 2 (b) or 2(c) qualifies a line as Type B, the Type B classification ends 150 feet (45.7 m) from the nearest dwelling in the cluster. metallic
Part192.docx