Download or read book Examination of Failed Gas Cylinder Residual Pressure Valves and Valves of a Similar Type Produced by Ceodeux written by J. Joel and published by . This book was released on 2004 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gas Cylinders Residual Pressure Valves Specification and Type Testing of Cylinder Valves Incorporating Residual Pressure Devices written by British Standards Institute Staff and published by . This book was released on 1917-09-27 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pressure vessels, Compressed gases, Gas valves, Gas cylinders, Dissolved gases, Type testing, Valves, Liquefied gases
Download or read book Gas cylinders Residual pressure valves General requirements and type testing written by and published by . This book was released on 2008 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gas Cylinders Residual Pressure Valves General Requirements and Type Testing written by British Standards Institute Staff and published by . This book was released on 2005-05-24 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gas cylinders, Gas valves, Valves, Type testing, Compressed gases, Liquefied gases, Dissolved gases, Pressure vessels
Download or read book DR 05354 Valves for Compressed Gas Cylinders Part 1 written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gas Lift Valve Failure Mode Analysis and the Design of a Thermally actuated Positive locking Safety Valve written by Eric W. Gilbertson and published by . This book was released on 2010 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gas-lifted oil wells are susceptible to failure through malfunction of gas lift valves. This is a growing concern as offshore wells are drilled thousands of meters below the ocean floor in extreme temperature and pressure conditions and repair and monitoring become more difficult. Gas lift valves and oil well systems have been modeled but system failure modes are not well understood. In this thesis a quasi-steady-state fluid-mechanical model and a transient thermal model are constructed to study failure modes and sensitivities of a gas-lifted well system including the reservoir, two-phase flow within the tubing, and gas lift valve geometry. A set of three differential algebraic equations of the system is solved to determine the system state. Gas lift valve, two-phase flow, and reservoir models are validated with well and experimental data. Sensitivity analysis is performed on the model and sensitive parameters are identified. Failure modes of the system and parameter values that lead to failure modes are identified using Monte Carlo simulation. In particular, we find that the failure mode of backflow through the gas lift valve with a leaky check valve is sensitive to small variations in several design parameters. To address the failure modes studied, a positive-locking, thermally-actuated safety valve is designed to shut off flow through the gas lift valve in the event of failure. A prototype of the positive-locking valve is constructed and thermal actuation is tested.
Download or read book Failure Analysis of Pressure Letdown Valve from the Synthoil Process Development Unit written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Several processes are being developed to convert coal with high S and ash contents to fuel oil with significantly lower concentrations of these constituents. One such process is Synthoil, a one-step hydrodesulfurization process that accomplishes over 94% conversion to oil in a short time. The reaction is carried out at temperatures around 450°C and pressures of 2000 and 4000 psig. One area subject to excessive wear is the pressure letdown valve on the product oil line. At 900 kg/day PDU at PERC, these valves, which operate at a pressure differential of 4000 psi and a temperature of 125°C must be replaced after about 1000 hr. One of these valves that failed in a typical manner after 915 hr was examined. It contained a replaceable trim set made of cemented WC inserts brazed to the valve plug and press-fitted to the valve seat. Failure of the valve was due to localized erosion of the WC inserts. The failure mode was preferential erosion-corrosion of the Co-Cr binder, allowing the hard WC particles to be washed away in the product oil. A full-scale Plexiglas model of the valve was made and it was found that slight misalignments of the plug with respect to the seat cause large changes in flow patterns through the valve. Many factors can change the local rate of erosion at a plug-to-seat region. In this case eccentricity of the trim set probably contributed to uneven flow aroundthe plug, and progressively higher local flow rates with increasing wear caused failure. The eccentricity may have arisen during manufacture or during service as a result of cracking of the stem-to-tip braze.
Download or read book Gas Cylinders Compatibility of Cylinder and Valve Materials with Gas Contents written by British Standards Institution and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
