(a) Anticipated external loads ( e.g., earthquakes, vibration, thermal expansion, and contraction) must be provided for in a pipeline system's design. Sections 401, 402, 403.3, and 403.9 of ASME B31.4 (incorporated by reference, see § 195.3) must be followed to provide for expansion and flexibility.
(b) The pipe and other components must be supported in such a way that the support does not cause excess localized stresses. In designing attachments to pipe, the added stress to the wall of the pipe must be computed and compensated for.
[34 FR 15473, Oct. 4, 1969 as amended by Amdt. 195-9, 41 FR 13590, Mar. 31, 1976; Amdt. 195-22, 46 FR 38357, July 27, 1981; Amdt. 195-48, 58 FR 14519, Mar. 18, 1993; Amdt. 195-107, 89 FR 33264, Apr. 29, 2024; Amdt. 195-117, 90 FR 40764, Aug. 21, 2025]