...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...

...Mir Ali Ghaffari; Hossein Hosseini-Toudeshky Contributed by the Pressure Vessel and Piping Division of ASME for publication in the J ournal of P ressure V essel T echnology . Manuscript received November 21, 2012; final manuscript received February 1, 2013; published online May 21, 2013...

.... 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...

.... , 1982 , “ Vibration Characteristics of Finned Tubes With Small Fins ,” VGB Kraftwerkstechnik , 62 ( 7 ), pp. 498 – 506 , English translation. 13 12 2010 13 04 2011 25 01 2012 25 01 2012 elasticity mechanical stability pipes fluidelastic instability finned...

... package ansys in two steps. FE-mesh First, the temperature field in the plate is computed using 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...

... 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...

... employed to calculate the J values were taken from Refs. [ 5 12 13 14 ]. The J -integral of through wall circumferential cracked pipe under bending can be expressed as: 1 J = J e + J p 2 J e = K 2 / E 3 J p = J p 0 + ∫ θ...

...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...

... than ±2% of full scale at void fractions above 50%. Side view of the test section showing the tube bundle and the flat bar supports locations Two-phase Freon flow from the MR-3 heater enters the test section from the left through a 152.4 mm (6-in.) diameter pipe at the bottom. The flow...

... corrosion creep failure analysis inspection metallurgy pipes preventive maintenance thickness measurement reheater pendent tube scale exfoliation scale formation metallurgical examination visual inspection Failures in boiler tubes have been discussed and summarized by Port and Herro...

... ions. The use of impingement plates and water chemistry control were the most appropriate methods to prevent such failures. 17 12 2009 20 02 2011 19 10 2011 19 10 2011 bending boilers corrosion fatigue failure analysis fatigue cracks heat exchangers pipes stainless...

... direction versus frequency at 3.8 m/s, for 90% void fraction 01 02 2011 27 04 2011 03 10 2011 03 10 2011 drag elasticity flow instability pipes vibrations Steam generators are principal components of nuclear power plants. They are effectively heat exchangers...

... 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. deformation fracture pipes thin wall structures meshfree fracture mechanics References 1 Song , M...