46 C.F.R. Subpart 56.35—Expansion, Flexibility and Supports
Title 46 - Shipping
(a) A summary of the results of pipe stress calculations for the main and auxiliary steam piping where the design temperatures exceed 800°F shall be submitted for approval. Calculations shall be made in accordance with one of the recognized methods of stress analysis acceptable to the Marine Safety Center to determine the magnitude and direction of the forces and movements at all terminal connections, anchor and junction points, as well as the resultant bending stress, longitudinal pressure stress, torsional stress, and combined expansion stress at all such points. The location of the maximum combined stress shall be indicated in each run of pipe between anchor points. (b) Special consideration will be given to the use of the full tabulated value of S in computing Sh and Sc where all material used in the system is subjected to additional nondestructive testing as specified by the Marine Safety Center, and where the calculations prescribed in 119.6.4 and 102.3.2 of ANSI-B31.1 and §56.07–10 are performed. The nondestructive testing procedures and method of stress analysis shall be approved by the Marine Safety Center prior to the submission of computations and drawings for approval. [CGD 77–140, 54 FR 40607, Oct. 2, 1989] (a) Nonmetallic expansion joints certified in accordance with subpart 50.25 of this subchapter are acceptable for use in piping systems. (b) Nonmetallic expansion joints must conform to the standards listed in Table 56.60–1(b) of this part. Nonmetallic expansion joints may be used within their specified pressure and temperature rating in vital and nonvital machinery sea connections inboard of the skin valve. These joints must not be used to correct for improper piping workmanship or misalignment. Joint movements must not exceed the limits set by the joint manufacturer. [CGD 77–140, 54 FR 40607, Oct. 2, 1989] (a) Metallic expansion joints certified in accordance with subpart 50.25 of this subchapter are acceptable for use in piping systems. (b) Metallic expansion joints must conform to the standards listed in Table 56.60–1(b) of this part and may be used within their specified pressure and temperature rating. [CGD 77–140, 54 FR 40607, Oct. 2, 1989]
Title 46: Shipping
PART 56—PIPING SYSTEMS AND APPURTENANCES
Subpart 56.35—Expansion, Flexibility and Supports
§ 56.35-1 Pipe stress calculations (replaces 119.7).
§ 56.35-10 Nonmetallic expansion joints (replaces 119.5.1).
§ 56.35-15 Metallic expansion joints (replaces 119.5.1).
