A Bayesian quantitative nondestructive evaluation (QNDE) approach to estimating remaining life of aging pressure vessels and piping

2013 ◽  
Author(s):  
J. T. Fong ◽  
J. J. Filliben ◽  
N. A. Heckert ◽  
W. F. Guthrie
Keyword(s):  
Nondestructive Evaluation ◽  
Pressure Vessels ◽  
Remaining Life

Quantitative nondestructive evaluation of delamination damage in CFRP pressure vessels for space use

2006 ◽  
Author(s):  
Takahide Sakagami ◽  
Shiro Kubo ◽  
Yukio Hyodo ◽  
Toshio Ogasawara ◽  
Takashi Nishimura ◽  
...  
Keyword(s):  
Nondestructive Evaluation ◽  
Space Use ◽  
Pressure Vessels ◽  
Delamination Damage

Fitness-for-Service Strategies for Impulsively Loaded Vessels

2020 ◽  
Vol 143 (3) ◽  
Author(s):  
Thomas A. Duffey ◽  
Kevin R. Fehlmann
Keyword(s):  
Pressure Vessels ◽  
Material Behavior ◽  
Remaining Life ◽  
Structural Damping ◽  
Asme Code ◽  
Simplifying Assumptions ◽  
Section Viii ◽  
Repeated Use ◽  
Internal Blast Loading ◽  
Service Strategies

Abstract High-explosive containment vessels are often designed for repeated use, implying predominately elastic material behavior. Each explosive test imparts an impulse to the vessel wall. The vessel subsequently vibrates as a result of the internal blast loading, with amplitude diminishing exponentially in time after a few cycles due to structural damping. Flaws present in the vessel, as well as new flaws induced by fragment impact during testing, could potentially grow by fatigue during these vibrations. Subsequent explosive tests result in new sequences of vibrations, providing further opportunity for flaws to grow by fatigue. The obvious question is, How many explosive experiments can be performed before flaws potentially grow to unsafe limits? Because ASME Code Case 2564-5 (Impulsively Loaded Pressure Vessels) has just been incorporated in Section VIII, Division 3 of the 2019 ASME Boiler and Pressure Vessel Code, evaluation of remaining life and fitness-for-service of explosive containment vessels now draws upon two interrelated codes and standards: ASME Section VIII-3 and API-579/ASME FFS-1. This paper discusses their implementation in determining the remaining life of dynamically loaded vessels that have seen service and are potentially damaged. Results of a representative explosive containment vessel are presented using actual flaw data for both embedded weld flaws and fragment damage. Because of the potentially large number of flaws that can be detected by modern nondestructive inspection methods, three simplifying assumptions and a procedure are presented for conservatively eliminating from further consideration the vast majority of the flaws that possess considerable remaining life.

Fitness for Service Assessment of a Metal Loss Using Combination of Small-Scale Testing and DNV RP F101/API579 Procedures

2007 ◽  
Author(s):  
A. Motarjemi
Keyword(s):  
Tensile Properties ◽  
Wall Thickness ◽  
Pressure Vessels ◽  
Small Scale ◽  
Metal Loss ◽  
Remaining Life ◽  
Test Technique ◽  
Failure Pressure ◽  
Destructive Test ◽  
Tensile Data

One of the major issues in the oil and gas industries is occurrence of corrosion on equipments in-service such as tanks, pressure vessels, piping, etc. Metal loss (general/localized) and pitting are amongst the typical corrosion damages. For assessing the significance of metal loss, information such as (a) geometry of the component, (b) a record of thickness measurements (point or profile readings) and (c) tensile properties such as Yield and Tensile strengths, preferably in the vicinity of the metal loss, are required. This information are usually fed into a Fitness for Service (FFS) assessment guideline/recommended practice such as DNV RP-F101 or API579, and a minimum required wall thickness (tmin), failure pressure or remaining life is derived. In the absence of actual tensile data (obtained from a conventional tensile test), specified minimum values (lower-bound), as suggested in the design codes, are currently the only other alternative. However, this paper is aimed at presenting two more alternative techniques; non-destructive test technique called Instrumented Indentation Testing (IIT) or Automated Ball Indenter (ABI) and a semi-destructive test technique, called Micro-Flat tensile (MFT). Both techniques are capable of determining the local tensile properties of the material in the vicinity of the metal loss. Values of the minimum required wall thickness (tmin), failure pressure and remaining life, using tensile data obtained from the IIT, MFT and specified minimum values are compared with the predictions based on the actual tensile data.

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.

Identification of In-Plane Elastic Constants of Composite Laminates Using Measured Strains

1999 ◽  
Author(s):  
T. Y. Kam ◽  
C. H. Lin ◽  
W. T. Wang
Keyword(s):  
Nondestructive Evaluation ◽  
Minimization Problem ◽  
Composite Laminates ◽  
Global Minimum ◽  
Error Function ◽  
Laminated Composite ◽  
Pressure Vessels ◽  
Minimization Method ◽  
Material Constants ◽  
Constrained Minimization Problem

Abstract A method for nondestructive evaluation of material constants of composite laminates is presented. An error function is established to measure the differences between the theoretically and experimentally predicted strains. The identification of the material constants is formulated as a constrained minimization problem in which the material constants are determined to make the error function a global minimum. A global minimization method together with a technique for normalizing the gradient of the objective function are used to solve the above minimization problem. The applications of the proposed method are demonstrated by means of several examples on the material constants identification of laminated composite cylindrical pressure vessels.

Research and development roadmaps for nondestructive evaluation of cables, concrete, reactor pressure vessels, and piping fatigue

2013 ◽  
Author(s):  
Dwight A. Clayton ◽  
Sasan Bakhatiari ◽  
Cyrus Smith ◽  
Kevin Simmons ◽  
Pradeep Ramuhalli ◽  
...  
Keyword(s):  
Research And Development ◽  
Nondestructive Evaluation ◽  
Pressure Vessels ◽  
Reactor Pressure

Nondestructive Evaluation of FRP Design Criteria With Primary Consideration to Fatigue Loading

2004 ◽  
Vol 126 (2) ◽  
pp. 216-228 ◽  
Author(s):  
Guillermo Ramirez ◽  
Paul H. Ziehl ◽  
Timothy J. Fowler
Keyword(s):  
Nondestructive Evaluation ◽  
State Of The Art ◽  
Accurate Determination ◽  
Fatigue Loading ◽  
Pressure Vessels ◽  
Allowable Level ◽  
Strength Tests ◽  
Recorded Performances ◽  
Better Than

Design of FRP tanks and pressure vessels is based on criteria developed in the late 1960s using materials and procedures that represented the state of the art at the time. Maximum strain has been the controlling factor selected for the design of these vessels at an allowable level of 0.001. With the development of newer materials and systems with recorded performances of better than 0.001 this is now an inefficient limit in the design. Tests performed in the programs described in this paper indicate that newer materials perform well at higher strains. Results of strength tests performed here indicated that strains of 0.002 to 0.003 or better are possible in the safe design of tanks and pressure vessels. In addition, more accurate determination of design limits is possible if methods like acoustic emission are incorporated in the design process.

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