Regulations last checked for updates: May 18, 2024

Title 40 - Protection of Environment last revised: May 16, 2024
Appendix - Table 26 to Subpart G of Part 63—Seal Related Factors for Internal Floating Roof Vessels
Seal type KS n
Liquid mounted resilient seal:
Primary seal only3.00
With rim-mounted secondary seal a1.60
Vapor mounted resilient seal:
Primary seal only6.70
With rim-mounted secondary seal a2.50

a If vessel-specific information is not available about the secondary seal, assume only a primary seal is present.

authority: 42 U.S.C. 7401
source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.