Automated Procedure for Constructing ASME External Pressure Charts

2021 ◽  
Author(s):  
Maan Jawad ◽  
Xiaolin Chen ◽  
Donald Griffin
Keyword(s):  
Pressure Vessel ◽  
Lead Time ◽  
External Pressure ◽  
Pressure Vessels ◽  
New Materials ◽  
Construction Time ◽  
The Past

Abstract External Pressure charts are used for the design of most components in pressure vessels and boilers. The External Pressure Charts developed by the ASME Boiler and Pressure Vessel Code in the past for various materials were constructed manually at a fairly long lead time. ASME recently undertook a project to computerize the procedure for constructing External Pressure Charts for new materials at a fraction of the previous construction time. The methodology, assumptions, advantages, and limitations of this procedure are described in this paper.

The Method of Tangent Modulus Factor for the Design of External Pressure Vessels

2012 ◽  
Vol 479-481 ◽  
pp. 1578-1584 ◽  
Author(s):  
Dan Yang Chen ◽  
Chang He Tong ◽  
Kang Lin Liu
Keyword(s):  
Pressure Vessel ◽  
External Pressure ◽  
Pressure Vessels ◽  
Trial And Error ◽  
New Materials ◽  
Current Standard ◽  
Spherical Shells ◽  
Graphic Analysis ◽  
Calculation Results ◽  
Current Standards

To solve the problems such as too much trial-and-error, limited material being involved in the graphs and calculation results being obviously influenced by artificial factors and errors of the graphs in the design of external pressure vessel according to current standard ASME Ⅷ-1, GB150 and EN13445, the mathematic expression of the graphic charts is examined, and a set of analytical equations and algorithms for the linear and nonlinear instability of external pressure vessel are established. The equation was applied to calculate the ultimate buckling pressure of cylinder and spherical shells. The algorithm here provided can not only avoid the shortages of current graphic analysis methods, but also be convenient for technicians to calculate, which could enrich and consummate the graphic charts in the current standards and be useful to the design of external pressure vessels to be made of new materials.

Analysis of Half-Pipe Heating Channels on Pressure Vessel Shells

1986 ◽  
Vol 108 (4) ◽  
pp. 526-529
Author(s):  
A. E. Blach
Keyword(s):  
Pressure Vessel ◽  
Analytical Method ◽  
External Pressure ◽  
Pressure Vessels ◽  
Numerical Examples ◽  
Asme Code

Half-pipe heating channels are used on the outside of pressure vessels such as agitators, mixers, reactors, etc., to avoid the high external pressure associated with heating jackets. No applicable method of analysis is contained in the ASME Code and proof tests are normally required for registration with governing authorities. An analytical method is presented which permits the evaluation of stresses in shell and half pipe; numerical examples are included.

Remaining Life Assessment of an External Pressure Vessel in Creep Range and Inspection Findings

2017 ◽  
Author(s):  
Yoichi Ishizaki ◽  
Futoshi Yonekawa ◽  
Takeaki Yumoto ◽  
Teppei Suzuki ◽  
Shuji Hijikawa
Keyword(s):  
Pressure Vessel ◽  
Creep Damage ◽  
External Pressure ◽  
Pressure Vessels ◽  
Life Assessment ◽  
Remaining Life ◽  
Assessment Technique ◽  
Creep Cavity ◽  
Creep Analysis ◽  
Remaining Life Assessment

As widely recognized in the industry, it is important to evaluate the creep damage of an elevated temperature vessel so that the mechanical integrity of the vessel can be achieved through the adequate repair and replacement planning. This is quite straight forward procedure for internal pressure vessels. For an external pressure vessel, it is not easy to assess the creep damage due to the complexity of the creep buckling analysis. Eventually, creep cavity evaluation technique without identifying the correct stress distribution has been used so often. However, due to the uncertainty of the technique itself plus conservative mindset of the inspectors, it tends to leads to an excessive maintenance most of the cases. In order to conduct a reasonable remaining life assessment, it is desirable to use the creep cavity inspection in conjunction with another assessment technique such as FEM creep analysis as stated in API 579-1/ASME FFS-1 10.5.7. In this paper, comprehensive approach with FEM and field inspection such as creep cavity evaluation to reinforce the uncertainty of each method will be demonstrated.

scholarly journals Buckling analysis of thin-walled metal liner of cylindrical composite overwrapped pressure vessels with depressions after autofrettage processing

2021 ◽  
Vol 28 (1) ◽  
pp. 540-554
Author(s):  
Guo Zhang ◽  
Haiyang Zhu ◽  
Qi Wang ◽  
Xiaowen Zhang ◽  
Mingfa Ren ◽  
...  
Keyword(s):  
Pressure Vessel ◽  
Local Buckling ◽  
Bending Moment ◽  
High Strength ◽  
External Pressure ◽  
Pressure Vessels ◽  
Buckling Analysis ◽  
Straight Section ◽  
Metal Liner ◽  
Autofrettage Pressure

Abstract The cylindrical filament wound composite overwrapped pressure vessels (COPV) with metal liner has been widely used in spaceflight due to their high strength and low weight. After the autofrettage process, the plastic deformation of the metal liner is constrained by composite winding layers, which introduce depressions to the metal liner that causes local buckling. To predict the local buckling of the inner liner with depressions of the pressure vessel after the autofrettage process, a local buckling analysis method for the metal liner of COPV was developed in this article. The finite element method is used to calculate the overall stress distribution in the pressure vessel before and after the autofrettage process, and the influence of local depressions on the buckling is evaluated. The axial buckling of the pressure vessel under external pressure is analyzed. The control equation of the metal liner with depressions is developed, considering the changes in the pressure and the bending moment of the liner depressions and its vicinity during the loading and unloading process. Taking the cylindrical COPV (38 L) with aluminum alloy liner as an example, the effects of liner thickness, liner radius, the thickness-to-diameter ratio, autofrettage pressure, and the length of straight section on the autofrettage process are discussed. The results show that the thickness of the inner liner has the most significant influence on the buckling of the liner, followed by the length of the straight section and the radius of the inner liner, while the autofrettage pressure has the least influence.

Practical Considerations in Applying Laboratory Fracture Test Criteria to the Fracture-Safe Design of Pressure Vessels

1964 ◽  
Vol 86 (4) ◽  
pp. 429-443 ◽  
Author(s):  
W. S. Pellini ◽  
P. P. Puzak
Keyword(s):  
Transition Temperature ◽  
Pressure Vessel ◽  
Fracture Analysis ◽  
Pressure Vessels ◽  
Fracture Test ◽  
New Materials ◽  
Transition Range ◽  
The Family ◽  
Weight Test ◽  
Drop Weight Test

Trends in pressure vessel applications involving higher pressures, lower service temperatures, thicker walls, new materials, and cyclic loading require the development of new bases in the supporting scientific and technological areas. This report presents a “broad look” analysis of the opportunities to apply new scientific approaches to fracture-safe design in pressure vessels and of the new problems that have arisen in connection with the utilization of higher-strength steels. These opportunities follow from the development of the fracture analysis diagram which depicts the relationships of flaw size and stress level for fracture in the transition range of steels which have well-defined transition temperature features. The reference criteria for the use of the fracture analysis diagram is the NDT temperature of the steel, as determined directly by the drop-weight test or indirectly by correlation with the Charpy V test. Potential difficulties in the correlation use of the Charpy V test are deduced to require engineering interpretation of Charpy V test data rather than to involve basic barriers to the use of the test. The rapid extension of pressure vessel fabrication to Q&T steels is expected to provide new problems of fracture-safe design. These derive from the susceptibilities of steels within this family to tear fractures of low energy absorption. This fracture mode does not involve a transition temperature and is therefore relatively independent of temperature. It is emphasized that such susceptibilities are not inherent to the family of Q&T steels of low and intermediate strength levels, but are related to specific metallurgical conditions of the plate and particularly the HAZ (heat-affected-zone) regions of Q&T steel weldments.

Pressure Vessel Manufacture using the Chinese Ribbon Winding Technique

1989 ◽  
Vol 203 (2) ◽  
pp. 85-91 ◽  
Author(s):  
G Zhu ◽  
J Jiang ◽  
Z Wang ◽  
D G Moffat
Keyword(s):  
Pressure Vessel ◽  
Pressure Vessels ◽  
People’S Republic Of China ◽  
People's Republic Of China ◽  
Republic Of China ◽  
The Past ◽  
Steel Core ◽  
Thin Steel

During the past 20 years a technique has been developed in the People's Republic of China for manufacturing thick-walled pressure vessels using thin steel ribbons, helically wound under tension onto a thin inner steel core. The technique is described herein and the advantages claimed are outlined, together with brief descriptions of some related areas of development.

Fibre Reinforced Composite Pressure Vessel Heads Subject to External Pressure

2017 ◽  
Author(s):  
Martin Muscat ◽  
Duncan Camilleri ◽  
Brian Ellul
Keyword(s):  
Pressure Vessel ◽  
Weight Ratio ◽  
External Pressure ◽  
Pressure Vessels ◽  
Design Codes ◽  
Element Analysis ◽  
Inelastic Analysis ◽  
Reinforced Composite ◽  
Composite Pressure Vessel ◽  
Composite Pressure Vessels

The increase in stiffness to weight ratio and relative ease of manufacturing fibre reinforced composite pressure vessels, have put such vessels at the forefront of technology. However only limited research and specific codes pertaining exclusively to composite pressure vessel design can be found in literature. The ASME Boiler and Pressure Vessel (BPVC) Section X Code and the European design codes EN 13121-3:2016 (GRP tanks and vessels for use above ground) together with EN 13923:2005 (Filament wound FRP pressure vessels — materials, design, manufacturing and testing) are some of the few known design codes applicable to composite pressure vessels. These codes utilise both design by rule (DBR) and design by analysis (DBA) methods. The authors believe that more studies along the DBA route would benefit the composite pressure vessel design community and make it more accessible to designers and engineers. A similar scenario has already been seen in the last 10 to 15 years for steel pressure vessel design codes when DBA based on inelastic analysis was introduced. In line with these thoughts, this study compares the different design methods to prevent buckling and applies finite element analysis (FEA) to analyse a hemispherical GFRP pressure vessel head subjected to external pressure. The effect of material damage and geometrical imperfections on the final collapse failure is examined and discussed.

Review of Section VIII, Division 1 and 2 Changes, 2008–2010

2010 ◽  
Author(s):  
Thomas P. Pastor
Keyword(s):  
Pressure Vessel ◽  
Pressure Vessels ◽  
Major Event ◽  
The Past ◽  
Division 1 ◽  
Section Viii ◽  
Division 2

Three years ago the major event within Section VIII was the publication of the new Section VIII, Division 2. The development of the new VIII-2 standard dominated Section VIII activity for many years, and a new standard has been well received within the industry. As expected with any new standard, some of the material that was intended to be published in the standard was not ready at the time of publication so numerous revisions have taken place in the last two addenda. This paper will attempt to summarize the major revisions that have taken place in VIII-2 and VIII-1, including a detailed overview of the new Part UIG “Requirements for Pressure Vessels Constructed of Impregnated Graphite”. I have stated in the past that the ASME Boiler and Pressure Vessel Code is a “living and breathing document”, and considering that over 320 revisions were made to VIII-1 and VIII-2 in the past three years, I think I can safely say that the standard is alive and well.

Variable Material Properties Approach: A Review on Twenty Years of Progress

2018 ◽  
Vol 140 (5) ◽  
Author(s):  
Sasan Faghih ◽  
Hamid Jahed ◽  
Seyed Behzad Behravesh
Keyword(s):  
Pressure Vessel ◽  
Material Properties ◽  
Numerical Solutions ◽  
Pressure Vessels ◽  
Large Strains ◽  
The Past ◽  
Axisymmetric Problems ◽  
Distribution Of Stress ◽  
Deformation Modes ◽  
Made In

This paper provides a critical review of the advancements made in the application of the variable material properties (VMP) method over the past two decades. The VMP method was originally proposed in 1997 (Jahed and Dubey, 1997, ASME J. Pressure Vessel Technol., 119(3), pp. 264–273; Jahed et al., 1997, Int. J. Pressure Vessels Piping, 71(3), pp. 285–291) and further developed in 2001 (Parker, 2001, ASME J. Pressure Vessel Technol., 123(3), p. 271) as an elastoplastic method for the analysis of axisymmetric problems. The model was originally developed as a boundary value problem to predict the spatial distribution of stress. However, since 1997, it has been extended to include thermal effects to solve thermomechanical residual stresses; time domain to solve creep of disks and cylinders; finite deformation to solve cylinders under large strains; numerical solutions to make them more efficient; and asymmetric hardening behavior to accommodate nonslip deformation modes. These advancements, made over the past 20 years, are reviewed in this paper, and future trends and frontiers are discussed.

The Influence of Initial Geometric Imperfection on the Localized Buckling of Pressure Vessel Under Internal Pressure

2004 ◽  
Author(s):  
Li Wan ◽  
Wei-ming Tao ◽  
Xin-xin Wu ◽  
Shu-yan He
Keyword(s):  
Internal Pressure ◽  
Transition Region ◽  
Pressure Vessel ◽  
External Pressure ◽  
Pressure Vessels ◽  
Arc Length ◽  
Plastic Buckling ◽  
Geometric Imperfection ◽  
Initial Geometric Imperfection ◽  
Geometrical Imperfections

Pressure vessels are widely used in nuclear engineering and buckling is a common mechanical phenomenon in structure. The buckling problem of pressure vessels under external pressure has been researched for many years. This paper focuses on the influence of initial geometric imperfection on the localized elastic-plastic buckling of pressure vessel under internal pressure. The localized plastic buckling occurred in the transition region in the torispherical end closure of a pressure vessel is analyzed by FEM. By introducing two types of initial geometrical imperfections, the arc-length method of modified Riks/Ramm procedure is performed to simulate the buckling process during loading. The first type of imperfection is displacement, into the region where it is circumferentially compressed. The second type of imperfection is the irregular thickness of the vessel, also into the region where it is circumferentially compressed. The initial critical point is captured within the buckled region, and the corresponding initial buckling load is calculated. The results show that both artificial geometric imperfections can seduce the buckling. Furthermore, after the first buckling initiated, the succeeding loading will lead to more wrinkles within the compressive transition region. And then the case that with two distributed imperfections is also analyzed. It can be seen that the interaction between the imperfections is very weak before or even after the first buckling occurred, which means the buckling is fairly localized.

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