Pathfinder Pressure Testing Usdot 2476338
The certification documents required by § one hundred eighty.417(a) should embody both the date the cargo tank was originally certified to the specification and the date it was recertified. The specification plate on the cargo tank or the cargo tank motorized vehicle must display the date the cargo tank was initially licensed to the specification. Stretching means any change in length, width or diameter of the cargo tank, or any change to a cargo tank motorcar's undercarriage that will have an effect on the cargo tank's structural integrity.
Each cargo tank that has been out of hazardous supplies transportation service for a interval of 1 year or more must be stress tested in accordance with § 180.407(g) previous to further use. The cargo tank has sustained damage to an extent that may adversely have an effect on its lading retention functionality.
Each cargo tank, including its domes, should be crammed with water or other liquid having similar viscosity, at a temperature not exceeding a hundred °F. The cargo tank must then be pressurized to not less than the strain specified in paragraph (g)(iv) of this section. The cargo tank, together with its closures, should maintain the prescribed take a look at pressure for at least 10 minutes during which era it shall be inspected for leakage, bulging or some other defect.
All components of the cargo tank wall, as defined in § 178.320(a) of this subchapter, should be stress examined as prescribed by this paragraph. The cargo tank has been out of hazardous materials transportation service for a period of 1 year or extra.
(iii) Is operated in combination with a cargo tank full trailer. If the cargo tank isn't in conformance with the applicable specification necessities, the specification plate on the cargo tank must be removed, obliterated or securely lined. The details of the circumstances necessitating withdrawal of the certification have to be recorded and signed on the written certificate for that cargo tank.
If the stress aid system is installed as an integral part of a manhole cowl meeting, the manhole cover should adjust to the requirements of paragraph (g) of this part. MC 306, MC 307, and MC 312 cargo tanks marked or certified after December 30, 1990, and DOT 406, DOT 407, and DOT 412 cargo tank motor automobiles have to be outfitted with manhole assemblies conforming with § 178.345-5 of this subchapter. (ii) May be remarked and authorized in accordance with paragraphs (f) and of this section after the cargo tank motor vehicle has been equipped with the self-closing system. (v) The cargo tank is recertified to the unique specification in accordance with the reporting and record retention provisions of § 180.417.
The car proprietor shall retain the certificates for a minimum of 1 yr after withdrawal of the certification. As provided in paragraph (c) of this section, the proprietor of a cargo tank may elect to change reclosing strain reduction gadgets to more modern cargo tank specs. However, replacement devices constructed to the requirements of § 178. of this subchapter must provide the minimum venting capability required by the original specification to which the cargo tank was designed and constructed.
A broken cargo tank should be pressure examined in accordance with the procedures set forth in paragraph (g) of this part. The cargo tank exhibits proof of dents, cuts, gouges, corroded or abraded areas, leakage, or any other condition that might render it unsafe for hazardous supplies service. Any indicators of leakage should be repaired in accordance with § one hundred eighty.413. The suitability of any repair affecting the structural integrity of the cargo tank should be decided both by the testing required within the relevant manufacturing specification or in paragraph (g)(iv) of this part. Except during a stress test, a cargo tank will not be subjected to a pressure greater than its design stress or MAWP.