Seamless pressure vessels (tubes) are designed per Department of Transportation (DOT) Specification 3AAX or 3 T. These tubes are used in over- the-road transport of high pressure gases. In tube trailer, these tubes are supported at ends from outside threaded necks. This paper describes the technical basis which was used in developing CGA C-23 document, which provides guideline on inspection and evaluation of tubes neck mounting surfaces. API-579/ASME FFS-1 standard and test data were used in developing the guideline for acceptance rejection criteria of the tube neck containing local thin areas and thread wear, respectively.
Technical Basis for Evaluation of US DOT Seamless Pressure Vessels With Defects on Threaded Neck Used for Structural Support
Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received April 1, 2013; final manuscript received December 2, 2013; published online April 3, 2014. Assoc. Editor: Kunio Hasegawa.
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Rana, M. D., Treadwell, D., Ramachandran, S., and Khanal, A. K. (April 3, 2014). "Technical Basis for Evaluation of US DOT Seamless Pressure Vessels With Defects on Threaded Neck Used for Structural Support." ASME. J. Pressure Vessel Technol. August 2014; 136(4): 041601. https://doi.org/10.1115/1.4026206
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