Table 29 - Seal Related Factors for External Floating Roof Vessels

Latest version.

Seal typeWelded vesselsKSNRiveted vesselsKSNMetallic shoe seal:Primary seal only1.21.51.31.5With shoe-mounted secondary seal0.81.21.41.2With rim-mounted secondary seal0.21.00.21.6Liquid mounted resilient seal:Primary seal only1.11.0a NANAWith weather shield0.80.9NANAWith rim-mounted secondary seal0.70.4NANAVapor mounted resilient seal:Primary seal only1.22.3NANAWith weather shield0.92.2NANAWith rim-mounted secondary seal0.22.6NANAa NA=Not applicable.

                    
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