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Code of Federal Regulations Title 33. Navigation and Navigable Waters § 33.183.516 Cellular plastic used to encase fuel tanks

Current as of January 02, 2025 | Updated by Findlaw Staff

(a) Cellular plastic used to encase metallic fuel tanks must:

(1) Not change volume by more than five percent or dissolve after being immersed in any of the following liquids for 24 hours at 29° C:

(i) Reference fuel B ASTM D 471 (incorporated by reference, see § 183.5).

(ii) No. 2 reference oil of ASTM D 471 (incorporated by reference, see § 183.5).

(iii) Five percent solution of trisodium phosphate in water;  and

(2) Not absorb more than 0.12 pound of water per square foot of cut surface, measure under Military Specification MIL P–21929B.

(b) Non-polyurethane cellular plastic used to encase metallic fuel tanks must have a compressive strength of at least 60 pounds per square inch at ten percent deflection measured under ASTM D 1621 (incorporated by reference, see § 183.5), “Compressive Strength of Rigid Cellular Plastics”.

(c) Polyurethane cellular plastic used to encase metallic fuel tanks must have a density of at least 2.0 pounds per cubic foot, measured under ASTM D 1622 (incorporated by reference, see § 183.5), “Apparent Density of Rigid Cellular Plastics.”

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Cite this article: FindLaw.com - Code of Federal Regulations Title 33. Navigation and Navigable Waters § 33.183.516 Cellular plastic used to encase fuel tanks - last updated January 02, 2025 | https://codes.findlaw.com/cfr/title-33-navigation-and-navigable-waters/cfr-sect-33-183-516/

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