Application Discussion on the Fast-Closed Valve of the Tank Stored Flammable Liquids in Ocean Engineering

2012 ◽  
Vol 516-517 ◽  
pp. 741-745
Author(s):  
Bo Wan ◽  
Qing Xia Yang ◽  
Ming Xing Duan ◽  
Xi Xing Sun ◽  
Zhong Ming Lin
Keyword(s):  
Offshore Platforms ◽  
Storage Tanks ◽  
Ocean Engineering ◽  
Flammable Liquids ◽  
Corrosive Liquid ◽  
Alternative Measures ◽  
Typical Process

The importance of fast-closed valve for mitigating accident sequent when the pipeline of the tanks stored flammable liquids discussed in this paper broken was illuminated through studying on rules and analyzing accident. And the offshore platforms and ships were as example to list the relative codes and rules force requirements on fast-closed valve. By studying the typical process easy ignored in design - leakage due to siphoning effect, and the same time some typical pipelines and fast-closed valve arrangement and the corresponding alternative measures were given. And suggested that the storage tanks stored toxic and corrosive liquid or other dangerous liquids shall install a fast-closed valve or corresponding alternative measures in its pipeline for reducing the accident consequences due to leakage.

Multiphase Fluid Dynamics in Storage Tanks of Varying Geometry

2020 ◽  
Vol 143 (1) ◽  
Author(s):  
Obai Kargbo ◽  
Mi-An Xue ◽  
Jinhai Zheng
Keyword(s):  
Dynamic Pressure ◽  
Numerical Approach ◽  
Offshore Platforms ◽  
Storage Tanks ◽  
Fluid Sloshing ◽  
Hydrodynamic Response ◽  
Wave Heights ◽  
Free Surface Wave ◽  
Multiphase Fluid ◽  
Liquid Natural Gas

Abstract Sloshing control is key in the offshore storage and transportation of petroleum and other liquid phased products such as liquid natural gas (LNG). It is of interest in the enhancement of the structural stability of offshore platforms and floating production storage and offloading units. This work presents a numerical approach in the study and analysis of the effect of storage tank configurations on the hydrodynamic response of a multiphase-layered fluid undergoing sloshing. The study showed that tank configurations had an effect on the internal and free surface wave heights of the multiphase fluid sloshing in the tank, as well as on the dynamic pressure intensity being exerted on the tank walls, with some configurations exhibiting comparatively greater sloshing wave and pressure damping.

Interdisciplinary Aspects of Offshore Structures

2005 ◽  
Vol 39 (3) ◽  
pp. 99-115 ◽  
Author(s):  
Peter W. Marshall
Keyword(s):  
Interdisciplinary Collaboration ◽  
Offshore Structures ◽  
The Other ◽  
Physical Oceanography ◽  
Offshore Platforms ◽  
Ocean Engineering ◽  
Offshore Technology ◽  
Structural Engineer ◽  
Single Discipline

While some institutions treat Ocean Engineering as a single discipline, much of the progress in this area has been brought about by the interdisciplinary collaboration of experts in different areas, such as:Structural engineering Mineral resourcesOcean energy Offshore economic potentialRemotely operated vehicles Marine law & policyDynamic positioning Marine educationMoorings Marine materialsSeafloor engineering Physical oceanography/meteorologyLarge offshore platforms are usually designed by teams of engineers. Although the lead engineer often may be a structural engineer, many elements of the other technologies are involved. This paper is an update to earlier summaries by Marshall (1980, 1993), but retains many of the pre-Internet classic references. Papers from the Offshore Technology Conference are listed separately, and cited by OTC number.

scholarly journals Extinguishing performance of alcohol-resistant firefighting foams on polar flammable liquid fires

2019 ◽  
Vol 38 (1) ◽  
pp. 53-74
Author(s):  
Huiqiang Zhi ◽  
Youquan Bao ◽  
Lu Wang ◽  
Yixing Mi
Keyword(s):  
Saturated Vapor Pressure ◽  
Saturated Vapor ◽  
Storage Tanks ◽  
Fire Control ◽  
Flammable Liquid ◽  
Fire Extinguishing ◽  
Liquid Storage ◽  
Safe Production ◽  
Flammable Liquids ◽  
Fire Extinguishing System

The protection of polar flammable liquid storage tanks from fire is an important matter related to the safe production of enterprises and to the safety of people’s lives and property. Although the foam fire-extinguishing system has long been the main means for the fire protection of flammable liquid storage tanks, the influence of the physical properties of polar flammable liquids on the fire-extinguishing characteristics of alcohol-resistant foams has not been well studied, which causes many problems for engineering design. In the present work, 14 kinds of polar flammable liquids were used to carry out non-ignition tests and alcohol-resistant foam fire-extinguishing tests. The results show that water-miscible and water-immiscible polar flammable liquids exhibit significant differences in their interactions with the alcohol-resistant foams under non-ignition conditions. A lower specific gravity and a higher heat of combustion of polar flammable liquids will result in a longer time needed for fire control, and a higher saturated vapor pressure of polar flammable liquids will result in a longer time needed to extinguish the edge fire. In addition, the tests show that the forceful application of alcohol-resistant foams is not conducive to extinguishing fires involving polar flammable liquids and cannot even control the fires.

scholarly journals Study on Calculation of Pile Sliding Interval of Large-Diameter Steel Pipe Piles on Offshore Platforms

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Desen Kong ◽  
Meixu Deng ◽  
Yu Xu
Keyword(s):  
Large Diameter ◽  
New Method ◽  
Steel Pipe ◽  
Offshore Platforms ◽  
Ocean Engineering ◽  
Pipe Pile ◽  
Diameter Pipe ◽  
Working Principle ◽  
Relative Errors ◽  
Work Done

In ocean engineering, pile sliding often occurs in the driving process of large-diameter pipe piles and will affect the engineering quality, so accurate pile sliding interval is necessary. According to the stress situation of steel pipe pile out of actual engineering, the causes of pile sliding are analysed. Using the static equilibrium equation, the mud depth at which the pipe pile may slip is calculated. The influence of pile siding friction was considered when calculating the second pile sliding, and the pile siding friction is divided into three influential areas. Using integrating method, the work done by pile resistance is calculated. Combined with the working principle and power principle, the energy transformation equation of the pipe pile in the process of sliding is obtained, and the sliding length and interval of the pile are calculated. A comparison between the measured results and the real case calculation was conducted using this new method. The comparison indicated that the total relative errors in pile sliding interval are 8% to 16%, and the new method has high accuracy. The results of the new method are in accord with the measured data, which can provide a reference for predicting the interval of pile sliding in the project.

Study on Influence of Geometrical Dimensions of Floating Bodies on Cloaking Phenomenon

2016 ◽  
Author(s):  
Zhigang Zhang ◽  
Guanghua He ◽  
Xiaoqun Ju ◽  
Dong Yu
Keyword(s):  
Wave Interaction ◽  
Floating Body ◽  
Geometrical Parameters ◽  
Offshore Platforms ◽  
Ocean Engineering ◽  
Floating Bodies ◽  
Floating Structures ◽  
Wave Drift ◽  
Drift Force ◽  
Geometrical Dimensions

Mooring offshore floating structures such as offshore platforms in large waves and winds, against the drift force and rotational moments are challenging in offshore engineering and ocean engineering. To investigate these kind of problems named positioning problems accurately, not only in hydrodynamic forces of first order but also in time-averaged steady forces of second order named wave drift force need to be taken into account. That arranging of several small cylinders regularly on a circle concentric with a fixed floating body is considered to reduce the wave drift force. Fortunately, a Cloaking phenomenon occurs at certain conditions with proper geometrical dimensions of floating bodies, which can reduce the wave drift force acting on bodies, perfectly even to zero. In this paper, with a combination of higher-order boundary element method (HOBEM) and wave-interaction theory, the influences of geometrical parameters of outer surrounding cylinders on the wave drift force of floating bodies are systematically investigated and discussed.

Sign in / Sign up

Export Citation Format

Share Document