Table 4 Short-term and area exposure level assessment of HCFC-123
Valve assembly | Nitrogen charging | Exposure standard | |||
|---|---|---|---|---|---|
Exposure concentration | Time measured | Exposure concentration | Time measured | ||
(ppm) | (min) | (ppm) | (min) | ||
Short-term exposure | 149.3–193.4 | 15 | 114.6–114.9 | 15 | None |
Area exposure | 58.3–187.2 | 75–90 | 75.5–112.3 | 90–92 | |