Prediction of Burst Pressure of Pipes With Geometric Eccentricity

2015 ◽  
Vol 137 (6) ◽  
Author(s):  
Zhanfeng Chen ◽  
Weiping Zhu ◽  
Qinfeng Di ◽  
Wenchang Wang
Keyword(s):  
Finite Element ◽  
Function Method ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Element Model ◽  
Burst Pressure ◽  
Gas Industry ◽  
Tresca Criterion ◽  
Special Case ◽  
Theoretical Results

An analytical model was proposed in this paper to predict the burst pressure of a pipe with geometric eccentricity. With application of the complex elastic potential function method in a bipolar coordinate system, the authors first derived an analytical solution of stresses in an eccentric pipe and then obtained the formula of predicting burst pressure by combining the solution with the Tresca criterion. Finally, the effect of eccentricity and the ratio of thickness to diameter of pipe on burst pressure were discussed. Our results show that a slight eccentricity can significantly decrease the burst pressure. In the special case of zero-eccentricity for a concentric pipe, our model yields results that are consistent with experiments data published by others and theoretical results predicted by models proposed by other researchers without considering the effect of eccentricity. In the case of eccentricity for an eccentric pipe, the calculating results of our model are also consistent with that of finite element model (FEM). The theoretical model and results presented in this paper have a broader application in predicting the burst pressure for pipes commonly used in oil and gas industry.

Estimation of Ice Load on a Ship Hull Based on Strain Measurements

2008 ◽  
Author(s):  
Bernt J. Leira ◽  
Lars Bo̸rsheim
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Element Model ◽  
Coast Guard ◽  
Ship Hull ◽  
Gas Industry ◽  
Arctic Regions ◽  
Lack Of Information ◽  
Measured Strain ◽  
Vessel Speed

The increased activity related to the oil and gas industry in polar waters implies that proper operation of ships such areas also will be in focus. The loading on a particular ship hull depends strongly on the route selection and vessel speed. Lack of information about the actual ice condition and the corresponding loads acting on the hull is identified to be among the most critical factors when operating in Arctic waters. This implies that there is a challenging interaction between strength-related design rules and schemes for operation of ships in arctic regions. In particular, the possibility of monitoring ice-induced stresses in order to provide assistance in relation to ship manoevering becomes highly relevant. The present paper is concerned with estimation of ice loads acting on the hull of the coast guard vessel KV Svalbard based on strains that were measured during the winter of 2007 as part of a project headed by DNV. Application of a finite element model of the bow structure is also applied in order to correlate the loading with the measured strains. The influence of ice thickness and vessel speed on the measured strain levels is also investigated.

An Effective Computational Parametric Appraoch for Optimization of Adhesively Bonded Tubular Joints Subjected to Torsion Loading

2006 ◽  
Author(s):  
Ramin Hosseinzadeh ◽  
Nader Cheraghi ◽  
Farid Taheri
Keyword(s):  
Finite Element ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Design Parameters ◽  
Loading Conditions ◽  
Adhesively Bonded ◽  
Gas Industry ◽  
Tubular Joints ◽  
Composite Pipes ◽  
Joint Length

Due to their low manufacturing cost, low stress concentration and ease of maintenance, adhesively bonded joints are now one of the most commonly and widely used joining systems in various industrial applications. As the use of composites gains popularity in oil and gas industry, the use of such joints for joining composite pipes is also gaining demand. The design and analysis methodologies applied to these joints under different loading conditions are however non-standard and rather controversial. The inherently complicated equations governing the behaviour of these joints have also impeded their use among the design engineers. As stated, however, as the use of composite pipes gains more popularity in oil and gas industry, the need for standardization of the methodology used for designing such joints becomes more essential. This paper discusses the details of 2D axis-symmetric and full-3D finite element models developed using the ABAQUS commercially available FEM software [1] for modeling and characterizing a series of adhesively bonded tubular joints used in isotropic and orthotropic pipes. The parametric script module of ABAQUS was used to systematically investigate the influence of several design parameters (such as the adhesive thickness, joint length, joint diameter, pipe material, and loading conditions), which govern the performance of such joints. The influence of various parameters specific to composite pipes (including the effect of laminate stacking sequence) was also investigated. Generated from the investigations was a set of useful design curves that provide the relationships among the parameters governing the behaviour of the joints. An important feature of the approach is its ability to establish the most optimized and effective joint length. The integrity of the optimization procedure was evaluated by comparing the response of the joints designed based on the developed design curves with those analyzed in detail by the finite element method (FEM).

Stress and Strain Fields in the Hemispherical Head of an FCC Regenerator During the Lifting Maneuver in Cyclone Replacement

2013 ◽  
Author(s):  
Erik Garrido ◽  
Euro Casanova
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Element Model ◽  
Sensitivity Analyses ◽  
Mechanical Equipment ◽  
Displacement Fields ◽  
Gas Industry ◽  
Total Displacement ◽  
Stress And Displacement Fields ◽  
Special Studies

The Oil and Gas industry is constantly seeking for improvements in the design of mechanical equipment. Each refining process is the subject of continuous research, which is frequently addressed in the revisions of the corresponding standard. Nevertheless, particular technologies such as the Fluid Catalytic Cracking Units (FCCU) are not governed by any International Standard but by designs developed and patented by specialized licensors. The implementation of new designs requires special studies of the original equipment in order to assess the feasibility of the related works and the required provisions to accomplish the revamp. This work studies the stress and displacement fields occurring in the hemispherical head of an FCC regenerator during the lifting maneuver for a typical cyclone replacement. A parametric finite element model was developed and stress and total displacement charts are presented as a function of diameters and thicknesses of hemispherical heads commonly found in the industry. Sensitivity analyses are presented with respect to a variation of ±15% of the applied loads and the size of the plenum chamber. Therefore, the results shown in this work present a reference framework for the replacement of cyclones in FCC regenerators when removing their hemispherical heads.

Functional Analysis of a HPHT Subsea Tool Under Thermal Loads

2021 ◽  
Author(s):  
Gaurav Bansal ◽  
Ali Sepehri ◽  
Mangesh Edke
Keyword(s):  
Oil And Gas ◽  
Fluid Flows ◽  
Oil And Gas Industry ◽  
Element Model ◽  
Thermal Loads ◽  
Gas Industry ◽  
Valve Assembly ◽  
Offshore Oil And Gas ◽  
Critical Regions ◽  
Offshore Oil

Abstract The offshore oil and gas industry continues to develop new tools that are intended to be operated in increasingly harsh environments. Stricter requirements result in more complex assemblies that are composed of multiple closely fitting components. Fluid flows at high temperatures lead to transient and non-uniform temperature distributions in tools. This can affect tool functionality which needs to be assessed with the help of numerical techniques. The objective of this study is to evaluate the effect of thermal loads on the functionality of a valve assembly. A thermal finite element model of the assembly is developed to obtain temperature distribution everywhere in the model in transient and steady states. Temperature profiles are later mapped into structural models to obtain thermal strains at critical regions of the assembly. Thermal deformations are evaluated against internal acceptance criteria for operational functionality of the assembly.

Prediction of Internal Pressure of Flexible Pipe

2019 ◽  
Author(s):  
Qiangqiang Shao ◽  
Ting Liu ◽  
Shuai Yuan ◽  
Peihua Han ◽  
Yong Bai
Keyword(s):  
Theoretical Model ◽  
Oil And Gas ◽  
Virtual Work ◽  
Fluid Pressure ◽  
Oil And Gas Industry ◽  
Element Model ◽  
Petroleum Products ◽  
Burst Pressure ◽  
Flexible Pipe ◽  
Flexible Pipes

Abstract The flexible pipes are widely used in the oil and gas industry to transport petroleum products. The pipe might burst fails when a large internal fluid pressure acts on the pipe, and the consequences are disastrous. In order to ensure the security and reliability of flexible pipes in the application, the mechanical responses of the pipe subjected to high pressure loads should be carefully estimated. The main purpose of this paper is to investigate the burst pressure of the pipe. Based on the principle of virtual work, a theoretical model for stress and deformations of the pipe is established, which takes the material plasticity into consideration. In addition, a finite element model is developed by ABAQUS to verify the feasibility of the theoretical model. According to the verified model, it is efficient to predict the burst pressure and design its cross-section economically with its serving conditions.

scholarly journals ANALISIS KEKUATAN GATE VALVE 2 9/16 3.000 PSI AKIBAT TEKANAN FLUIDA MENGGUNAKAN FINITE ELEMENT ANALYSIS SOLIDWORKS 2018

2020 ◽  
Vol 5 (1) ◽  
pp. 21
Author(s):  
Bisma Herlambang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Safety Factor ◽  
Gate Valve ◽  
Oil And Gas ◽  
Fluid Pressure ◽  
Oil And Gas Industry ◽  
Element Analysis ◽  
Gas Industry ◽  
And Control

<p><em>Valve (valve) as one of the industrial products, is needed by companies engaged in controlling fluid flow for efficiency. This need is widely used by power companies and the oil and gas industry. The purpose of using valves is to limit and control liquids under high pressure conditions. One valve that is often used is the gate valve, which is a valve with a type of motion fully open and fully close. The demand for this gate valve requires a product with certain specifications to have a design with a good level of strength. In other words, a good valve product (valve), must have a good strength, safe and in accordance with the needs to be tested. This study aims to analyze the gate valve 2 9/16 WP 3,000 psi to ensure the valve produced is according to specifications, strong and resistant to fluid pressure. The method used is Finite Element Analysis (FEA) with the 2018 Solidworks software. The analysis is performed on the gate valve with a full open, full closed state and with gradual loading starting at 1,000 psi, 2,000 psi and 3,000 psi resulting from Computational Fluid Dynamics (CFD). The analysis was carried out at 300C, Based on the results of the analysis with FEA, it was stated that the gate valve 2 9/16 WP 3,000 psi was strong and safe to use. The safety factor value is significantly higher than the minimum permissible safety factor value.</em></p>

Deployment of Digital NDT Solutions in the Oil and Gas Industry

2020 ◽  
Vol 78 (7) ◽  
pp. 861-868
Author(s):  
Casper Wassink ◽  
Marc Grenier ◽  
Oliver Roy ◽  
Neil Pearson
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Gas Industry
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