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Test or inspection (cargo tank specification, configuration, and service)
Date by which first test must be completed (see note 1)
Interval period after first test
External Visual Inspection:
All cargo tanks designed to be loaded by vacuum with full opening rear heads
September 1, 1991
6 months
All other cargo tanks
September 1, 1991
1 Year
Internal Visual Inspection:
All insulated cargo tanks, except MC 330, MC 331, MC 338 (see Note 4).
September 1, 1991
1 Year
All cargo tanks transporting lading corrosive to the tank
September 1, 1991
1 Year
All other cargo tanks, except MC 338
September 1, 1995
5 Year
Lining Inspection:
All lined cargo tanks transporting lading corrosive to the tank
September 1, 1991
1 Year
Leakage Test:
MC 330 and MC 331 cargo tanks in chlorine service
September 1, 1991
2 Years
All other cargo tanks except MC 338
September 1, 1991
1 Year
Pressure Test:
(Hydrostatic or pneumatic) (See Notes 2 and 3)
All cargo tanks which are insulated with no manhole or insulated and lined, except MC 338.
September 1, 1991
1 Year
All cargo tanks designed to be loaded by vacuum with full opening rear heads.
September 1, 1992
2 Years
MC 330 and MC 331 cargo tanks in chlorine service
September 1, 1992
2 Years
All other cargo tanks
September 1, 1995
5 Years
Thickness Test:
All unlined cargo tanks transporting material corrosive to the tank, except MC 338.
September 1, 1992
2 Years
NOTE 1: If a cargo tank is subject to an applicable inspection or test requirement under the regulations in effect on December 30, 1990, and the due date (as specified by a requirement in effect on December 30, 1990) for completing the required inspection or test occurs before the compliance date listed in table I, the earlier date applies.
NOTE 2: Pressure testing is not required for MC 330 and MC 331 cargo tanks in dedicated sodium metal service.
NOTE 3: Pressure testing is not required for uninsulated lined cargo tanks, with a design pressure or MAWP 15 psig or less, which receive an external visual inspection and lining inspection at least once each year.
NOTE 4: Insulated cargo tanks equipped with manholes or inspection openings may perform either an internal visual inspection in conjunction with the external visual inspection or a hydrostatic or pneumatic pressure-test of the cargo tank.
Restoration Tank Trailer Corporation
9861 Highway 165 N
Sterlington, LA 71280
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Phone: 404-862-6422
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