33 C.F.R. § 183.516 Cellular plastic used to encase fuel tanks.
Title 33 - Navigation and Navigable Waters
(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.” [CGD 74–209, 42 FR 5950, Jan. 31, 1977, as amended by CGD 77–98, 42 FR 36253, July 14, 1977; CGD 81–092, 48 FR 55737, Dec. 15, 1983; USCG–2000–7223, 65 FR 40059, June 29, 2000]
Title 33: Navigation and Navigable Waters
PART 183—BOATS AND ASSOCIATED EQUIPMENT
Subpart J—Fuel Systems
Equipment Standards
§ 183.516 Cellular plastic used to encase fuel tanks.
