Design and Analysis of Buried Liquid Petroleum Gas Storage Bullets Supported on Multiple Saddles (PVP2010-25052)

2012 ◽  
Vol 134 (3) ◽  
Author(s):  
Radoslav Stefanovic ◽  
Yaser Noman
Keyword(s):  
High Pressure ◽  
Petrochemical Industry ◽  
Gas Storage ◽  
Differential Settlement ◽  
Soil Resistance ◽  
Bending Moments ◽  
Ambient Temperatures ◽  
Liquid Petroleum Gas ◽  
Simplified Method ◽  
Design Construction

The use of large, high pressure liquid petroleum gas (LPG) storage bullets has become a common, and often assumed safe, practice in the petrochemical industry. The Engineering Equipment and Materials Users Association (EEMUA) is an organization that has attempted to address design aspects related to mounded or buried bullets; Publication No. 190 published by the EEMUA (2000, Guide for the Design, Construction and Use of Mounded Horizontal Cylindrical Vessels for Pressurized Storage of LPG at Ambient Temperatures, EEMUA, London, England.) became a standard practice in the industry. However, the design recommended, and therefore addressed, by Publication 190 is for bullets directly supported by soil (i.e., without saddle supports). However, it has been noticed by the authors that many users are requesting these storage bullets be supported by saddles resting on foundations in order to minimize the chance of unexpected settling and any motion of the bullets underground. The large span of these bullets requires more than two saddles adding to the complexity of the design due to statically indeterminate construction, differential settlement, and uneven supports. This paper focuses on major issues related to the design of such bullets. First, the loads induced by mound weight, pressure due to mound, and the loads due to longitudinal thermal expansion and soil resistance to this expansion is analyzed. Next, a method for calculating the multiple saddle reactions and bending moments at spans and supports is provided. A simplified method for assessing the effect of differential settlement between saddles is proposed.

Design and Analysis of LPG Storage Bullets Supported on Multiple Saddles

2010 ◽  
Author(s):  
Radoslav Stefanovic ◽  
Yaser Noman
Keyword(s):  
High Pressure ◽  
Thermal Expansion ◽  
Petrochemical Industry ◽  
Differential Settlement ◽  
Soil Resistance ◽  
Bending Moments ◽  
Large Span ◽  
Engineering Equipment ◽  
Liquid Petroleum Gas ◽  
Simplified Method

The use of large, high pressure Liquid Petroleum Gas (LPG) storage bullets has become a common, and often assumed safe, practice in the petrochemical industry. The Engineering Equipment and Materials Users Association (EEMUA) is an organization that attempted to address design aspects related to mounded or buried bullets. Publication No. 190 published by the EEMUA [1] became a standard practice in the industry. However, the design recommended, and therefore addressed, by Publication 190 is for bullets directly supported by soil (i.e. without saddle supports). However, it has been noticed by the authors that many users are requesting these storage bullets be supported by saddles resting on foundations in order to minimize the chance of unexpected settling and any motion of the bullets under ground. The large span of these bullets requires more than two saddles adding to the complexity of the design due to statically indeterminate construction, differential settlement and uneven supports. This paper focuses on major issues related to the design of such bullets. First, the loads induced by mound weight, pressure due to mound, and the loads due to longitudinal thermal expansion and soil resistance to this expansion is analyzed. Next, a method for calculating the multiple saddle reactions and bending moments at spans and supports is provided. A simplified method for assessing the effect of differential settlement between saddles is proposed.

An Approach to Determine the Stiffness Reduction Factor of Tunnel Lining

2011 ◽  
Vol 243-249 ◽  
pp. 3659-3662
Author(s):  
Hai Ying Zhou ◽  
Li Xin Li ◽  
Ting Guo Chen
Keyword(s):  
Numerical Analysis ◽  
Flexural Rigidity ◽  
Resistance Coefficient ◽  
Reduction Factor ◽  
Tunnel Lining ◽  
Soil Resistance ◽  
Stiffness Reduction ◽  
Simplified Method

Based on the segmental joint tests, it was found that the practical range of joint flexural rigidity was in range of 8500-29000kN•m/rad. A simplified method for determining the stiffness reduction factor of tunnel lining() was proposed using results from the segmental joint tests in which some parameters were obtained by calibration against a 3D Numerical analysis. The influence of joint flexural rigidity, soil resistance coefficient, thickness of tunnel lining and tunnel calculation radius on the stiffness reduction factor of tunnel lining was examined. The stiffness reduction factor can be simply expressed as a function of joint flexural rigidity ratio, soil resistance coefficient, thickness of tunnel lining and tunnel calculation radius for the typical tunnel lining.

ANALISA KINERJA CNG COOLER PADA SISTEM CNG PLANT

2021 ◽  
Vol 21 (2) ◽  
pp. 91-94
Author(s):  
Seno - Darmanto ◽  
Muhammad Fahrudin
Keyword(s):  
High Pressure ◽  
Heat Exchanger ◽  
Natural Gas ◽  
Peak Load ◽  
Normal Pressure ◽  
Gas Storage ◽  
Compressed Natural Gas ◽  
Plant System ◽  
Process Utility

CNG Cooler is a heat exchanger in CNG Plant System which has function to reduce CNG temperature. CNG (Compressed Natural Gas) is natural gas which compressed by gas compressor from normal pressure up to certain high pressure. CNG Plant is gas storage and supply facility for PLTGU when it work at peak load hours. CNG Cooler reduce temperature of CNG which out from gas compressor before saved in storage utility which purpose to avoid over heating in the next process, increase durability of the next process utility, and make gas storage utility design easy.

scholarly journals Impact of long-term storage at ambient temperatures on the total quality and stability of high-pressure processed tomato juice

2015 ◽  
Vol 32 ◽  
pp. 1-8 ◽  
Author(s):  
K.G.L.R. Jayathunge ◽  
Irene R. Grant ◽  
Mark Linton ◽  
Margaret F. Patterson ◽  
Anastasios Koidis
Keyword(s):  
High Pressure ◽  
Tomato Juice ◽  
Total Quality ◽  
Ambient Temperatures ◽  
Long Term Storage ◽  
Term Storage

Leakage Analysis of a High Pressure Flange Connection Under Bending Moments: An Analytic Procedure

2014 ◽  
Author(s):  
Matthias Bortz ◽  
Rolf Wink
Keyword(s):  
High Pressure ◽  
Contact Pressure ◽  
Fluid Pressure ◽  
Safety Margin ◽  
Bending Moment ◽  
Operating Conditions ◽  
Bending Moments ◽  
Spherical Lens ◽  
Flange Connection ◽  
Bolt Stress

High pressure flange connections for LDPE plants are designed using lens ring gaskets and bolted flange connections. The sealing principle is to achieve a high contact pressure between the spherical lens shape and the conical tube end. This contact pressure must exceed the fluid pressure by a safety margin under all operating conditions. Bending moments acting on the flange connection will create an uneven distribution of contact pressure over the lens ring surface. In this paper a procedure is shown to analyse the influence of the bending moment under consideration of internal pressure on a flange connection using 3-dimensional finite element models. The variations in bolt stress and distribution of contact pressures due to the bending moment are of specific interest. A first approach will be provided to derive some simplified design rules regarding leakage assessment of such flange connections.

Study on the Capacity Increasing and Dam Heighten of Plain Reservoirs

2013 ◽  
Vol 353-356 ◽  
pp. 2531-2536
Author(s):  
Xiu Guang Song ◽  
Zhi Dong Zhou ◽  
Hong Bo Zhang ◽  
Hong Ya Yue
Keyword(s):  
Numerical Simulation ◽  
Comparative Analysis ◽  
Site Investigation ◽  
Seepage Flow ◽  
Differential Settlement ◽  
Construction Technology ◽  
Dam Stability ◽  
The Stability ◽  
Design Construction

In order to solve the problem of differential settlement, seepage flow and stability between the new and old dam boundary in capacity increasing of the plain reservoirs, the comparative analysis on the stability of the dam slope with different methods on dealing with the new and old dam boundary was performed by numerical simulation with FLAC3D. The result shows that combining the new and old dam by using geogrid indicates superiority for reducing differential settlement, improving the dam stability and safety, etc. In the meantime, on the basis of actual site investigation and theoretical analysis, combined with the requirements of design, construction and management in capacity increasing of the plain reservoirs, the key construction technology was put forward and widely applied foreground, which can improve the quality of the construction, reduce engineering disease and provide references for capacity increasing engineering of in plain reservoirs.

Case Study on the Effect of Mean Stress on Ground Storage Vessels for Fuelling

2019 ◽  
Author(s):  
Daniel T. Peters ◽  
Myles Parr ◽  
Matthew Naugle
Keyword(s):  
High Pressure ◽  
Natural Gas ◽  
Gas Storage ◽  
Pressure Vessels ◽  
Lower Pressure ◽  
Mean Stress ◽  
Gaseous Fuels ◽  
Design Pressure

Abstract The use of high-pressure vessels for the purpose of storing gaseous fuels for land based transportation application is becoming common. Fuels such as natural gas and hydrogen are currently being stored at high pressure for use in fueling stations. This paper will investigate the use of autofrettage in high pressure cylinders and its effects on the life of a vessel used for gas storage. Unlike many high-pressure vessels, the life is controlled by fatigue when cycled between a high pressure near the design pressure and a lower pressure due to the emptying of the content of the vessels.

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