Low Air Pressure Switch Kenworth
(ii) A repair, modification, stretching, or rebarrelling of a non-ASME stamped cargo tank could also be accomplished with out certification by an Authorized Inspector, completion of the R-1 form, or being stamped with the “R” stamp. Any restore, modification, stretching, rebarrelling, or mounting of a cargo tank must be carried out in conformance with the necessities of this section. Any cargo tank with a weld defect corresponding to a crack, pinhole, or incomplete fusion, or a structural defect must be taken out of hazardous supplies service till repaired. Normal vents (1 psig vents) must be examined according to the testing standards established by the valve manufacturer.
Corroded or abraded areas of the cargo tank wall have to be thickness examined in accordance with paragraphs (i), (i), (i) and (i) of this section. When the cargo tank is not equipped with a manhole or inspection opening, or the cargo tank design precludes an internal inspection, the tank shall be hydrostatically or pneumatically tested in accordance with 180.407(c) and (g). Corroded or abraded areas of the cargo tank wall have to be thickness examined in accordance with the procedures set forth in paragraphs (i), (i), (i) and (i) of this part. Where insulation precludes an entire external visible inspection as required by paragraphs (d) through (d) of this part, the cargo tank also should be given an inner visible inspection in accordance with paragraph (e) of this section.
(A) With MC 306 reclosing strain reduction valves, it must open at not lower than three psi and no more than 4.four psi and should reseat to a leak tight-condition at no less than 2.7 psi. For MC 331 cargo tanks constructed earlier than October 1, 2003, minimum thickness shall be decided by the thickness indicated on the U1A kind minus any corrosion allowance. For MC 331 cargo tanks constructed after October 1, 2003, the minimum thickness will be the value indicated on the specification plate. If no corrosion allowance is indicated on the U1A type then the thickness of the tank shall be the thickness of the fabric of construction indicated on the UIA type with no corrosion allowance. An owner of a cargo tank that now not conforms with the minimum thickness prescribed for the specification could not return the cargo tank to hazardous supplies service.
The tank's specification plate must be eliminated, obliterated or lined in a secure manner. Minimum thicknesses for MC 300, MC 301, MC 302, MC 303, MC 304, MC 305, MC 306, MC 307, MC 310, MC 311, and MC 312 cargo tanks are determined based on the definition of minimal thickness present in § 178.320(a) of this subchapter. The following Tables I and II identify the “In-Service Minimum Thickness” values to be used to determine the minimum thickness for the referenced cargo tanks. The column headed “Minimum Manufactured Thickness” signifies the minimal values required for new development of DOT four hundred sequence cargo tanks, present in Tables I and II of §§ 178.346-2, 178.347-2, and 178.348-2 of this subchapter. (ii) The specification plate heating system info is modified to point that the cargo tank has no working heating system.
(iv) Assure the suitability of each modification, stretching and rebarrelling that affects the lading retention capability of the cargo tank by performing the checks required within the applicable specification or § one hundred eighty.407(g)(iv). (ii) Assure compliance of the rebuilt cargo tank's structural integrity, venting, and accident injury safety with the applicable specification requirements. (v) For specification MC 338 cargo tanks, the provisions of specification MC 338. Each individual performing a repair, modification, stretching, rebarrelling or mounting of a DOT specification cargo tank should be registered in accordance with subpart F of half 107 of this chapter.
The plate must include the name of the particular person or facility doing the work, DOT registration number, date work is accomplished, retest info, and any other data that differs from the unique plate. The supplemental plates should be installed immediately adjacent to the prevailing plate or plates.
Each specification cargo tank should be tested and inspected as specified in the following table by an inspector meeting the qualifications in § 180.409. The retest date shall be determined from the required interval identified within the following desk from the most recent inspection or the CTMV certification date.