J. Pressure Vessel Technol.: All Topics http://scitation.aip.org/ J. Pressure Vessel Technol.: All Topics Characteristics and Modeling of Multiple Direction Optimized-Friction Pendulum System With Numerous Sliding Interfaces Subjected to Multidirectional Excitations http://link.aip.org/link/doi/10.1115/1.4005398 C. S. Tsai, H. C. Su, and Yung-Chang Lin<br/> In this paper, a base isolator called a multiple direction optimized-friction pendulum system (Multiple DO-FPS) with numerous sliding interfaces is proposed. To understand the mechanical behavior of the Multiple DO-FPS isolator under multidirectional excitations, an analytical model called the multi ... [J. Pressure Vessel Technol. 134, 021801 (2012)] published Wed Jan 25, 2012. Cover Requirement and Stability of Horizontally Bent Buried Pipelines http://link.aip.org/link/doi/10.1115/1.4005395 Hamdan N. Al-Ghamedy, Sahel N. Abduljauwad, Junaid A. Siddiqui, Naser A. Al-Shayea, and Ibrahim M. Asi<br/> A method of calculating soil cover requirements for horizontally bent buried pipelines is described. In sequence, the results of a comprehensive three-dimensional finite element analysis are used to develop regression models for two dependent variables: maximum allowed temperature change and minimum ... [J. Pressure Vessel Technol. 134, 021701 (2012)] published Fri Jan 13, 2012. Development of Nondestructive Test and Safety Assessment of Electrofusion Joints for Connecting Polyethylene Pipes http://link.aip.org/link/doi/10.1115/1.4004869 Jinyang Zheng, Jianfeng Shi, and Weican Guo<br/> Polyethylene (PE) pipes are widely used in transporting natural gas since 1960s. However, there are few published literatures on method for safety assessment of PE pipes. This paper introduces recent work in developing ultrasonic nondestructive testing (NDT) equipment and research on safety assessme ... [J. Pressure Vessel Technol. 134, 021406 (2012)] published Mon Jan 30, 2012. Economic and Technical Efficiency of High Performance Abrasive Waterjet Cutting http://link.aip.org/link/doi/10.1115/1.4004800 Axel Henning, H.-T. Liu, and Carl Olsen<br/> Abrasive waterjets have recently become a popular tool for mechanical machining. With its great advantages of geometric and material flexibility and its ability to cut hard-to-machine material, the technology is quickly spreading throughout many industries. With this process, near net-shape producti ... [J. Pressure Vessel Technol. 134, 021405 (2012)] published Tue Jan 17, 2012. Influence of Chemical Compositions on Lower Ferrite-Austenite Transformation Temperatures in 9% Cr Steels http://link.aip.org/link/doi/10.1115/1.4005399 Michael L. Santella<br/> Computational thermodynamics approach was used to predict the ranges of the lower ferrite-austenite transformation temperatures, A's, in three 9% Cr steels. The predicted A ranges were: 766856 degrees C for SA387 Grade 91, 775863 degrees C for SA213 Grade T92, and 676862 degrees C for the weld me ... [J. Pressure Vessel Technol. 134, 021404 (2012)] published Fri Jan 13, 2012. Effect of Welding Conditions on Residual Stress and Stress Corrosion Cracking Behavior at Butt-Welding Joints of Stainless Steel Pipes http://link.aip.org/link/doi/10.1115/1.4005391 Jinya Katsuyama, Tohru Tobita, Hiroto Itoh, and Kunio Onizawa<br/> Stress corrosion cracking (SCC) in Type 316 L low-carbon austenitic stainless steel recirculation pipes have been observed near butt-welding joints. These SCC in Type 316 L stainless steel grow near the welding zone mainly because of the high tensile residual stress caused by welding. Therefore, for ... [J. Pressure Vessel Technol. 134, 021403 (2012)] published Wed Jan 11, 2012. Evaluation of Fracture Toughness by Master Curve Approach Using Miniature C(T) Specimens http://link.aip.org/link/doi/10.1115/1.4005390 Naoki Miura and Naoki Soneda<br/> The fracture toughness master curve shows the relationship between the median of fracture toughness and temperature in the ductilebrittle transition temperature region of ferritic steels such as reactor pressure vessel (RPV) steels. The master curve approach specified in the ASTM standard theoretica ... [J. Pressure Vessel Technol. 134, 021402 (2012)] published Wed Jan 11, 2012. Potential Detrimental Consequences of Excessive PWHT on Pressure Vessel Steel Properties http://link.aip.org/link/doi/10.1115/1.4005054 Cedric Chauvy, Lionel Coudreuse, and Patrick Toussaint<br/> During fabrication of Pressure Vessels, steels undergo several heat treatments that aim to confer the required properties on the entire equipment, including welds and base metal. Indeed, the production heat treatment of the base material, which leads to achieve the target properties, is most of the ... [J. Pressure Vessel Technol. 134, 021401 (2012)] published Wed Jan 11, 2012. Fluidelastic Instability in Normal and Parallel Triangular Arrays of Finned Tubes http://link.aip.org/link/doi/10.1115/1.4004621 J. Wang and D. S. Weaver<br/> An experimental study was carried out to investigate fluidelastic instability in finned tube bundles in normal and parallel triangular arrays. Three arrays of each geometry type were studied experimentally: two arrays with serrated, helically wound finned tubes of different fin densities, and a bare ... [J. Pressure Vessel Technol. 134, 021302 (2012)] published Wed Jan 25, 2012. Exploring the Effect of V-Shaped Cut at Blade Exit of a Double Volute Centrifugal Pump http://link.aip.org/link/doi/10.1115/1.4004798 Amro M. Al-Qutub, Atia E. Khalifa, and Faleh A. Al-Sulaiman<br/> The effect of V-cut at impeller blades' exit on internal pressure fluctuations, case vibration, and performance of a double volute boiler-feed pump has been investigated. Scaled model pump and two impellers, with and without the V-cut, were used in a closed water test loop to conduct experimental te ... [J. Pressure Vessel Technol. 134, 021301 (2012)] published Tue Jan 17, 2012. Leak Before Break Analysis of Steam Generator Shell Nozzle Junction for Sodium Cooled Fast Breeder Reactor http://link.aip.org/link/doi/10.1115/1.4005385 N. Mani, G. Thanigaiyarasu, and P. Chellapandi<br/> The steam generators (SG) control the capacity factor of sodium cooled fast reactor plants and hence they are designed with high reliability. One of the strategies to enhance the reliability is to demonstrate leak before break (LBB) justification. LBB analysis is reported for 500 MWe sodium cooled f ... [J. Pressure Vessel Technol. 134, 021211 (2012)] published Wed Jan 25, 2012. Effect of Conical Angle and Thread Pitch on the Self-Loosening Performance of Preloaded Countersunk-Head Bolts http://link.aip.org/link/doi/10.1115/1.4005058 Amro M. Zaki, Sayed A. Nassar, and Xianjie Yang<br/> This paper investigates the effect of the countersunk conical angle and thread pitch on the loosening performance of preloaded countersunk-head bolts that are subjected to harmonic transverse loading. A nonlinear mathematical model is used to predict the loosening performance. Cumulative differentia ... [J. Pressure Vessel Technol. 134, 021210 (2012)] published Wed Jan 25, 2012. Flexibility Factors for High Density Polyethylene Elbows http://link.aip.org/link/doi/10.1115/1.4004616 Rudolph J. Scavuzzo, Charles N. Papadelis, and Siegrid Hall<br/> A method is proposed to calculate Flexibility Factors for molded and mitered 90 deg polyethylene elbows for both in-plane and out-of-plane loading based on Code Case N-319-3, January 17, 2000. Displacement measurements in the direction of the applied forces were made during the testing of each elbow ... [J. Pressure Vessel Technol. 134, 021209 (2012)] published Thu Jan 19, 2012. Spatial Electrostrictive Actuations of Flexible Circular Tubes http://link.aip.org/link/doi/10.1115/1.4005381 Shih-Lin Huang, Chin-Chou Chu, Chien C. Chang, and H.-S. Tzou<br/> This paper is aimed to study dynamic actuation of circular tubular shell structures coupled with distributed electrostrictive actuator segments. A mathematical model of the hybrid elastic/electrostrictive circular tubular shell, including the electrostrictive/elastic/control couplings, is derived. T ... [J. Pressure Vessel Technol. 134, 021208 (2012)] published Thu Jan 19, 2012. Lower Bound Limit Load Estimation Using a Linear Elastic Analysis http://link.aip.org/link/doi/10.1115/1.4005057 C. Hari Manoj Simha and R. Adibi-Asl<br/> We present a scheme that utilizes one elastic stress field (no iterations) to compute lower bound limit load multipliers of structures that collapse through gross (or localized) plasticity. A criterion to distinguish between these collapse modes is presented. For structures that collapse through gro ... [J. Pressure Vessel Technol. 134, 021207 (2012)] published Thu Jan 19, 2012. Shakedown Analysis Combined With the Problem of Heat Conduction http://link.aip.org/link/doi/10.1115/1.4004868 Jaan-Willem Simon, Min Chen, and Dieter Weichert<br/> This paper deals with the computation of shakedown loads of engineering structures subjected to varying loads. In particular, we focus on thermal loading and the resulting heat conduction problem in combination with shakedown analysis. The analysis is based on the lower bound shakedown theorem by Me ... [J. Pressure Vessel Technol. 134, 021206 (2012)] published Tue Jan 17, 2012. Engineering Design of a Multiple-Use Spherical Explosion Containment Vessel Subjected to Internal Blast Loading From 25 kg TNT High Explosive http://link.aip.org/link/doi/10.1115/1.4005397 Q. Dong, B. Y. Hu, S. Y. Chen, and Y. Gu<br/> Explosion containment vessels have been widely used to contain the internal blast effects. In this paper, we present engineering design and experimental results of a real multiple-use spherical explosion containment vessel, which has been employed to withstand internal blast loading from 25 kg trini ... [J. Pressure Vessel Technol. 134, 021205 (2012)] published Fri Jan 13, 2012. The Impact of the Bauschinger Effect on Stress Concentrations and Stress Intensity Factors for Eroded Autofrettaged Thick Cylindrical Pressure Vessels http://link.aip.org/link/doi/10.1115/1.4005396 Q. Ma, C. Levy, and M. Perl<br/> Our previous studies have shown that stress intensity factors (SIFs) are influenced considerably from the presence of the Bauschinger Effect (BE) in thick-walled pressurized cracked cylinders. For some types of pressure vessels, such as gun barrels, working in corrosive environment, in addition to a ... [J. Pressure Vessel Technol. 134, 021204 (2012)] published Fri Jan 13, 2012. Probabilistic Fatigue Assessment of a Notched Detail Taking Into Account Mean Stress Effects http://link.aip.org/link/doi/10.1115/1.4005392 Abilio M. P. De Jesus, M. Luisa Ruiz Ripoll, Alfonso Fernandez-Canteli, Enrique Castillo, and Helder F. S. G. Pereira<br/> Probabilistic fatigue models are required to account conveniently for the several sources of uncertainty arising in the prediction procedures, such as the scatter in material behavior. In this paper, a recently proposed stress-based probabilistic model is assessed using fatigue data available for th ... [J. Pressure Vessel Technol. 134, 021203 (2012)] published Fri Jan 13, 2012. Analysis of Thermal and Mechanical Behavior of Pipe Flange Connections by Taking Account of Gasket Compression Characteristics at Elevated Temperature http://link.aip.org/link/doi/10.1115/1.4005388 Toshimichi Fukuoka, Masataka Nomura, and Takashi Nishikawa<br/> Sealing of contained fluids is the primary performance required for pipe flange connections. It is well known that the leakage is likely to occur when contained fluids at high temperature are concerned. Due to the differential thermal expansion of each part, bolt preloads that tighten a pair of pipe ... [J. Pressure Vessel Technol. 134, 021202 (2012)] published Wed Jan 11, 2012. A Proposed Model for Predicting Clamp Load Loss Due to Gasket Creep Relaxation in Bolted Joints http://link.aip.org/link/doi/10.1115/1.4005387 Basil A. Housari, Ali A. Alkelani, and Sayed A. Nassar<br/> An improved mathematical model is proposed for predicting clamp load loss due gasket creep relaxation in bolted joints, taking into consideration gasket behavior, bolt stiffness, and joint stiffness. The gasket creep relaxation behavior is represented by a number of parameters which has been obtaine ... [J. Pressure Vessel Technol. 134, 021201 (2012)] published Wed Jan 11, 2012. Extension of Fatigue Exemption Rules in Section VIII, Division 2 Slightly Into the Creep Regime http://link.aip.org/link/doi/10.1115/1.4003457 Charles Becht, IV and Charles Becht, V<br/> A number of alloys have applications slightly into the creep range that are in cyclic service, such as process reactors. The 2007 edition of Section VIII, Division 2 (2007, ASME Boiler and Pressure Vessel Code, Section VIII, Division 2, The American Society of Mechanical Engineers) provides allowabl ... [J. Pressure Vessel Technol. 134, 021101 (2012)] published Thu Jan 19, 2012.