...Mohamed Amir Chaker; Ali Triki The branching technique demonstrated an effective ability to attenuate severe hydraulic-head magnitudes into existing steel-pipes-based hydraulic systems. However, there was no detailed exploration of circumferential-stress, radial-strain, and wave-oscillation period...

... the inner surface of the host pipe. The objective of this study is to assess the burst pressure of pipelines with internal corrosion defects. The mechanical response of carbon steel API X42, X52, and X70 pipe grades are empirically estimated and implemented in a finite element model. The geometry...

...–36 ]. The same formulation and procedure are adapted for repaired pipes here. The calculation procedure in the virtual crack closure technique (VCCT) is performed in two stages. In the first step, the internal nodal forces are computed at the crack-tip F j and in the second step the crack...

.... To exacerbate and complicate this additional type of fatigue damage, power plant design pressures and temperatures are rising, new materials are being introduced, pipes and attached components are becoming increasingly thick, and owners are requiring power plants to heat-up and cool-down at faster rates. Also...

...Jinyang Zheng; Jianfeng Shi; Weican Guo 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...

... [( 5 )]. fluidelastic instability finned tubes effective diameter elasticity mechanical stability pipes 13 12 2010 13 04 2011 25 01 2012 25 01 2012 Table 2 Specifications of triangular arrays D eff (mm) P/D eff P (mm) Bare 3.3fpi...

... the eight node square element solid70 . In order to simulate the flow of hot fluids through the pipes which are fixed by the considered plate, temperature loads T are applied in the holes of the plate. The initial temperature of the plate is set at T 0  = 300 K. Two different loading cases have been...

... to develop regression models for two dependent variables: maximum allowed temperature change and minimum overburden height. Other variables considered include the pipe diameter and thickness, the radius and angle of the bend, the internal pressure, the fluid specific weight, and the material used...

...Jinya Katsuyama; Tohru Tobita; Hiroto Itoh; Kunio Onizawa 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...

...Toshimichi Fukuoka; Masataka Nomura; Takashi Nishikawa 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...

... crack arc length dependence and are influenced by the position of the longitudinal weld. cracks ductility fatigue mechanical stability petroleum industry pipes welds fracture toughness coiled tubing oil services J-R curves Coiled Tubings are thin walled steel tubes of 25–89...

...Tao Zhang; Frederick W. Brust; Gery Wilkowski; Do-Jun Shim; Jinsuo Nie; Charles H. Hofmayer; Syed A. Ali Nuclear power plant safety under seismic conditions is an important consideration. The piping systems may have some defects caused by fatigue, stress corrosion cracking, etc., in aged plants...

...S. Feli; M. E. Aalami Aaleagha; M. Foroutan; E. Borzabadi Farahani In this paper, a finite element simulation, based on abaqus software is presented for analyzing the temperature history and the residual stress states in multipass welds in stainless steel pipe. The uncoupled thermal–mechanical...

... and accurate safety measures according to different risk patterns. 26 12 2010 07 04 2011 07 04 2011 02 12 2011 02 12 2011 petroleum industry pipelines pipes risk management intelligent risk assessment risk pattern classification third-party interference SOM...

...Tianbai Li; Haofeng Chen; Weihang Chen; James Ure This paper presents the ratchet limit analysis of a pipe with an axisymmetric circumferential crack in a mismatched weld by using the extended linear matching method (LMM). Two loading conditions are considered: (i) a cyclic temperature load...

...-fe code. A summary of the numerical results is presented. 27 07 2010 07 07 2011 01 12 2011 01 12 2011 bars boilers design engineering dynamic response elasticity flow instability flow measurement heat transfer mechanical testing numerical analysis pipe flow...

... pendent tube. Prevention actions are recommended to avoid similar failures in the future. 23 11 2009 21 04 2011 31 10 2011 31 10 2011 boilers corrosion creep failure analysis inspection metallurgy pipes preventive maintenance thickness measurement reheater pendent...

..., 2004 , Rules for Inservice Inspection of Nuclear Power Plant Components , ASME Boiler and Pressure Vessel Code: Section XI, ASME , New York . 10 Wachel , J. C. , 1995 , “ Displacement Method for Determining Acceptable Piping Vibration Amplitudes ,” ASME/JSME Pressure Vessels and Piping...

... of Angle of Attack on the Fluidelastic Instability of a Tube Bundle subjected to Cross-Flow ,” ASME Pressure Vessels and Piping Conference , Prague, Czech Republic , Paper No. 77052. 8 Violette , R. , Pettigrew , M. J. , and Mureithi , N. W. , 2005 , “ Fluidelastic Instability...

... they avoid ill-conditioning as well as stiffening in numerical computations. Simulations of detonation driven fracture in thin pipes demonstrate the efficiency of the method. References 1 Song , M. , Wang , W. , and Zhao , Y. , 2007 , “ Urea Reactor Integrity Evaluation Based on Failure...