Layered pressure vessels provide a cost effective solution for high pressure gas storage. Several types of designs and constructions of layered pressure vessels are included in ASME BPV Section VIII Division 1, Division 2 and Division 3. Compared with conventional pressure vessels, there are two unique features in layered construction that may affect the structural integrity of the layered vessels in cycle service: The gaps may exist between the layers due to fabrication tolerances. An excessive gap height introduces a large bending stress. The ASME Codes provide rules on the maximum permissible number and size of gaps. The fatigue life of the vessel may be governed by the gap height. The rules on gap height requirements have been updated recently in Section VIII Division 2. Additionally, ASME code rules require vent holes in the layers to detect leaks from inner shell and to prevent pressure buildup between the layers. The fatigue life may be limited by the presence of stress concentration at vent holes. This paper reviews the technical background of the recent code update and discusses fatigue design and maximum permissible gap height calculations. Recommendations are made in design and fabrication to improve the fatigue life of layered pressure vessels in cyclic service.

 


Fatigue Considerations of Layered  Pressure Vessels

Division / Sponsors: 
Pressure Vessels & Piping (PVP)


Paper Proceedings: https://asmedigitalcollection.asme.org/PVP/PVP2020/volume/83815

PVP2020 - Virtual Conference

Supporting the need among researchers worldwide for additional online and multimedia content, ASME now offers the ASME Conference Video Collection. This platform will collect and provide long-term access to conference presentation videos, encompassing all technology areas within ASME's technical conference and events program. About 30,000-40,000 engineers across all mechanical engineering and related disciplines participate in ASME conferences each year. This includes authors of approximately 6,000 to 8,000 technical papers published by ASME, the majority of whom also submit video presentations for our virtual conferences. The video collection will be available as an add-on to existing product packages or as a separate subscription.