0
Research Papers: Operations, Applications & Components

Technical Basis for Evaluation of US DOT Seamless Pressure Vessels With Defects on Threaded Neck Used for Structural Support

[+] Author and Article Information
Mahendra D. Rana

Fellow ASME
Engineering Fellow
Praxair, Inc.,
175 East Park Drive,
Tonawanda, NY 14151
e-mail: Mahendra_Rana@Praxair.com

David Treadwell

Chief Engineer
CP Industries,
2214 Walnut St.
McKeesport, PA 15132-7054
e-mail: Dave.treadwell@cp-industries.com

Srikanth Ramachandran

NDT Engineer
City Machine & Welding, Inc.,
9701 Business Loop I-40,
West Amarillo, TX 79124
e-mail: sri@cmwelding.com

Abani K. Khanal

Mechanical Engineer
City Machine & Welding, Inc.,
9701 Business Loop I-40,
West Amarillo, TX 79124
e-mail: abani@cmwelding.com

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.

J. Pressure Vessel Technol 136(4), 041601 (Apr 03, 2014) (6 pages) Paper No: PVT-13-1058; doi: 10.1115/1.4026206 History: Received April 01, 2013; Revised December 02, 2013

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.

FIGURES IN THIS ARTICLE
<>
Copyright © 2014 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 3

Example of general thread wear

Grahic Jump Location
Fig. 4

Examples of local thin areas in tube neck

Grahic Jump Location
Fig. 5

Neck pin mark modeled as local thin area

Grahic Jump Location
Fig. 6

DOT 3T tube neck analysis with 0.26 in. pin mark diameter and 0.55 in. neck

Grahic Jump Location
Fig. 2

Typical mounting of a DOT tube

Grahic Jump Location
Fig. 1

Typical tube trailer

Grahic Jump Location
Fig. 7

DOT 3T tube neck analysis with 0.31 in. pin mark diameter and 0.55 in. neck

Grahic Jump Location
Fig. 8

DOT 3T tube neck analysis with 0.50 in. pin mark diameter and 0.55 in. neck

Grahic Jump Location
Fig. 9

Comparison of shear strength of theoretical and experimental results for uniform thread wear

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In