Retest Table 1
Specification | Retest interval-years | Minimum Retest pressure-psig | Pressure relief valve pressure-psig | |||
Tank | Pressure relief devicesd | Tank hydrostatic expansionc | Tank air test | Start-to- discharge | Vapor tight | |
DOT 27 | 5 | 2 | 500 | 100 | 375 | 300 |
106A500 | 5 | 2 | 500 | 100 | 375 | 300 |
106A500X | 5 | 2 | 500 | 100 | 375 | 300 |
106A800 | 5 | 2 | 800 | 100 | 600 | 480 |
106A800X | 5 | 2 | 800 | 100 | 600 | 480 |
106A800NCI | 5 | 2 | 800 | 100 | 600 | 480 |
107A * * * * | d5 | a2 | (b) | None | None | None |
110A500-W | 5 | 2 | 500 | 100 | 375 | 300 |
110A600-W | 5 | 2 | 600 | 100 | 500 | 360 |
110A800-W | 5 | 2 | 800 | 100 | 600 | 480 |
110A1000-W | 5 | 2 | 1,000 | 100 | 750 | 600 |
BE-27 | 5 | 2 | 500 | 100 | 375 | 300 |
NOTES:
a If DOT 107A * * * * tanks are used for transportation of flammable gases, one rupture disc from each car must be burst at the interval prescribed. The sample disc must burst at a pressure not exceeding the marked test pressure of the tank and not less than 70 percent of the marked test pressure. If the sample disc does not burst within the prescribed limits, all discs on the car must be replaced.
b The hydrostatic expansion test pressure must at least equal the marked test pressure.
c See § 180.519(b)(1) .
d Safety relief valves of the spring-loaded type on tanks used exclusively for fluorinated hydrocarbons and mixtures thereof which are free from corroding components may be retested every 5 years.
49 C.F.R. §180.519