40 CFR Appendix Table 29 to Subpart G of Part 63, Seal Related Factors for External Floating Roof Vessels

Table 29 to Subpart G of Part 63 - Seal Related Factors for External Floating Roof Vessels
Seal type Welded vessels Riveted vessels
KS N KS N
Metallic shoe seal:
Primary seal only 1.2 1.5 1.3 1.5
With shoe-mounted secondary seal 0.8 1.2 1.4 1.2
With rim-mounted secondary seal 0.2 1.0 0.2 1.6
Liquid mounted resilient seal:
Primary seal only 1.1 1.0 a NA NA
With weather shield 0.8 0.9 NA NA
With rim-mounted secondary seal 0.7 0.4 NA NA
Vapor mounted resilient seal:
Primary seal only 1.2 2.3 NA NA
With weather shield 0.9 2.2 NA NA
With rim-mounted secondary seal 0.2 2.6 NA NA

a NA = Not applicable.

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