40 CFR Part 63, Table 29
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
| 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 | 0.2 | 1.6 |
| Liquid mounted resilient seal: | | | | |
| Primary seal only | 1.1 | 1 | 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.