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 Wysłany: Sob 11:42, 26 Lut 2011 Temat postu: stivali ugg Shaanxi Longmen bottled oxygen vent oc |
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Shaanxi Longmen bottled oxygen vent occurred in the accident
Wall (solid bottle area) after; for filling the next set of preparations. About 3min later, when I heard soon after the blast walls Baoxiang, followed by the sound of air rapidly, the operator immediately evacuated to safe areas. After the scene, after investigation, found that one cylinder valve linked cream, and is of no pressure display, glass wall piece aluminum frame about 150mm in diameter area of burnt black,[link widoczny dla zalogowanych], and there Shaorong signs; of a few cylinders down on the ground, which hit a gas cylinder valve is crooked, the other a few stem deformation. First, the situation after the accident scene (1) of the cylinders purchased in 2001 from Beijing to a factory, certification, instruction manuals and inspection records are complete. (2) the disintegration of the valve spool and valve body that has been slip between the silk thread, and the bottle a small amount of rust. (3) filling time filling records show that only 18min. (4) Cylinder valve also hit a few crooked, stem deformation, and not wearing a bottle cap. Second,[link widoczny dla zalogowanych], the cause of the accident (1) cylinders with the gap large spool thread leading to the direct cause of the accident. Put into operation the bottle valve is not replaced,[link widoczny dla zalogowanych], due to frequent switching, resulting in thread with the gap larger. Close valve after filling, when the bottle pressure, temperature, acting on the spool thread engagement pressure on an inclined plane, beyond the set value of the slip caused by wire, the spool 2mm gap between the sudden switch to fully open position, causing all the spray air pressure relief. (2) filling time is short, too fast. Oxygen compressor used for filling bottles from the low pressure (10kPa) into the air, distilled water Ganyou Run slip into the current medium voltage (1MPa) into the air, no lubrication to significantly reduce the filling time. After the transformation, the operator acting rule of thumb, single-row group of filling, so filling time virtually reduced, the gas temperature rapidly in a short time. (3) The bottle is put into use has been a test, analysis, rust in the cylinder hydraulic pressure test is done after the drying process and the absence of residues. Third, the safety measures (1) increase the number of cylinders in each row of the charge, from a single row of 22 double l2 months to ensure the row filling rack full of filling, is to prevent the flow rate is too large, excessive temperature rise of the measures one. (2) to enhance the operator's responsibility to strictly enforce the provisions GB14194.93 the bottle temperature required to be checked. (3) transfer of experienced staff to conduct a comprehensive inspection of all gas cylinder valves. In particular, with the gap on the spool thread to detect than the standard spool of thread to give replacement. (4) specification cylinder attachment management. Not wearing a bottle cap for all, shock ring,[link widoczny dla zalogowanych], hand wheels, cylinders conduct a comprehensive inspection and make install. (5) of the cylinders in the rust and other debris were removed one by one,[link widoczny dla zalogowanych], to prevent accidents caused by others. (6) increasing the anti-bottle down device. (7) Acquisition-related temperature measuring instruments, to achieve the monitoring of the filling process. Shaanxi Longmen Iron & Steel Co., Ltd. Wang Praxair gas plant developed a new type of welding shielding gas company Praxair sales revealed that the company has developed into a specialist for welding galvanized steel or galvanized annealed steel, the name called HeliStarGV mixed shielding gas. The helium, argon and carbon dioxide gas mixture can increase the welding arc welding arc stability and improve performance, make better weld quality, welding productivity, making welding area solder layer minimal loss. Praxair is the latest Star series protective gas products, which can be used for welding galvanized steel or galvanized annealed steel, pipes and other parts. The new product is the company in Tonawanda, New York developed research and development institutions, which according to a special gas mixture needed to reduce spatter and weld clean up and improve the weld surface. Ultimately help to control and reduce the production of galvanized steel production costs. Users HeliStarGV Pulse the mixture of metal gas welding, with good results. Use this mixture on the transfer of various metals also gained good results, such as short-circuit and general injection and other types of solid and metal cored wire. Cryogenic technology publication No. 5, 2004 CryogenicTechnology № 5200461.
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