Failure Modes of API 12F Tanks with a Rectangular Cleanout and Stepped Shell Design

[+] Author and Article Information
Eyas Azzuni

Lyles School of Civil Engineering, Purdue University, West Lafayette, IN 47907, USA

Sukru Guzey

Lyles School of Civil Engineering, Purdue University, West Lafayette, IN 47907, USA

1Corresponding author.

ASME doi:10.1115/1.4041340 History: Received December 05, 2017; Revised August 24, 2018


The design and fabrication of shop welded and prefabricated relatively small tanks used in the upstream segment of the oil and gas industry is governed by the American Petroleum Institute Specification 12F (API 12F). The tanks designed and fabricated in conformance with API 12F meet the criteria to operate safely with specific internal pressure and vacuum pressure. This study explores the changing the designs of API 12F tanks to include a new rectangular cleanout design with reinforcement as shell extension internally of cleanout frame and a stepped shell design. This study also investigated the introduction of two additional tank sizes in addition to existing eleven tank sizes in the current 12th Edition of API 12F. The adequacy of the new design changes and proposed tank designs were verified by elastic stress analysis with nonlinear geometry, elastic-plastic stress analysis with nonlinear geometry, and elastic buckling analysis to verify their ability to operate at a design internal pressure of 16 oz/in2 (6.9 kPa) and maximum pressure during emergency venting of 24 oz/in2 (10.3 kPa). A vacuum pressure of 1.5 oz/in2 (0.43 kPa) was also investigated using the elastic buckling analysis. The stress levels and uplift of the tanks are reported in this report to provide insights into the behavior of proposed API 12F tanks exposed to higher internal pressure and vacuum pressure.

Copyright (c) 2018 by ASME
Your Session has timed out. Please sign back in to continue.





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