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CSA Z662 Class location end boundaries

Class location end boundaries There is a commentary available for this Clause. Notes:

1) Class location end boundaries are perpendicular to the pipeline axis.

2) Class location end boundaries are determined by separately applying the requirements of this Clause at each end of the class location.

4.3.4.1 Where class location designations are determined by the dwelling-unit density, class location end boundaries shall be determined using abutting pairs of class location assessment areas (see Figure 4.1).

4.3.4.2 There is a commentary available for this Clause. Except as allowed by Clause 4.3.4.3, where a Class 2 location designation is determined by the dwelling- unit density (see Table 4.1), the end boundaries for such a Class 2 location shall be located at least 200 m, measured parallel to the pipeline axis, from the dwelling unit that is located

a) just inside a class location assessment area that contains more than 10 but fewer than 46 dwelling units; and

b) just outside the closest class location assessment area that contains 10 or fewer dwelling units.

Note: See Figure 4.1 a) for an example showing the determination of an end boundary for such a Class 2 location. 4.3.4.3 Where a Class 2 location designation is determined by the dwelling-unit density and such a Class 2 location is adjacent to an undeveloped class location assessment area, the end boundary for such a Class 2 location may be determined without counting any dwelling units that are beyond the undeveloped class location area. Note: See Figure 4.1 b) for an example showing the determination of an end boundary for such a Class 2 location. 4.3.4.4 There is a commentary available for this Clause. Where a Class 2 location designation is determined by items other than the dwelling-unit density, the end boundaries for such a Class 2 location shall be at least 200 m, measured parallel to the pipeline axis, from each building that is occupied by 20 or more persons during normal use, each place of public assembly that is occupied by 20 or more persons during normal use, and each industrial installation where release of service fluids from the pipeline can cause the industrial installation to produce a dangerous or environmentally hazardous condition, whichever is applicable. 4.3.4.5 There is a commentary available for this Clause. Except as allowed by Clause 4.3.4.6, where a Class 3 location designation is determined by the dwelling- unit density, the end boundaries for such a Class 3 location shall be at least 200 m, measured parallel to the pipeline axis, from the dwelling unit that is located

a) just inside a class location assessment area that contains 46 or more dwelling units; and

b) just outside the closest class location assessment area that contains 45 or fewer dwelling units.

Note: See Figure 4.1 c) for an example showing the determination of an end boundary for such a Class 3 location. 4.3.4.6 Where a Class 3 location designation is determined by the dwelling-unit density and such a Class 3 location is adjacent to an undeveloped class location assessment area, the end boundary for such a Class 3 location may be determined without counting any dwelling units that are beyond the far end of such an undeveloped class location area. Note: See Figure 4.1 d) for an example showing the determination of an end boundary for such a Class 3 location.

4.3.4.7 There is a commentary available for this Clause. Where a Class 3 location designation results from the consideration of rapid evacuation from a building intended for human occupancy, the end boundaries for such a Class 3 location shall be at least 200 m, measured parallel to the pipeline axis, from each such building where rapid evacuation can be difficult. 4.3.4.8 There is a commentary available for this Clause. The end boundaries for Class 4 locations shall be at least 200 m, measured parallel to the pipeline axis, from the nearest building intended for human occupancy with four or more storeys above ground.

Read More:

CSA Z662-15 (Oil and gas pipeline systems)

Located in Calgary Alberta, We offer our Pipeline Engineering Services across Alberta and Canada. To get our Piping Stress Analysis Services, please contact our Engineering firm at:

littlepenginfo@gmail.com

1(855)444-5577

LITTLE P.ENG. FOR ENGINEERS TRAINING /  Engineering Consultant

3705 Fonda Way #18 Southeast Calgary, T2A 6G9

Canada

+1 (587) 802-4050

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