Construction method for mounting benzene hydrogenation engineering pressure pipeline
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A technology of pressure pipelines and construction methods, which is applied in the direction of pipeline laying and maintenance, pipes/pipe joints/fittings, mechanical equipment, etc., and can solve problems such as complicated and irregular manufacturing processes, and inconvenient installation and construction of pressure pipelines in benzene hydrogenation projects. To achieve the effect of safe and reliable project quality, reduce project construction cost, and reasonable design of operation steps
Active Publication Date: 2012-10-31
MCC5 GROUP CORP SHANGHAI
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At present, the installation and construction of pressure pipelines for benzene hydrogenation projects that have been built or are under construction in China are still in an irregular stage, and there are many unscientific and unreasonable places. The production process is complicated and the production cost is high.
[0003] Therefore there are above-mentioned inconveniences and problems in the installation and construction of known benzene hydrogenation engineering pressure pipelines
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[0047] The present invention is further illustrated below by specific examples.
[0048] The benzene hydrogenation project pressure pipeline installation and construction method of the present invention is characterized in that comprising the following steps:
[0049] a. Pipeline processing, including:
[0050] (1) Before the pipe is processed and cut, the original material mark shall be transplanted;
[0051] (2) Use a grinding wheel cutting machine or oxyacetylene flame to cut carbon steel pipes; use a pipe cutter, plasma cutter or bevel cutting machine to cut stainless steel pipes;
[0052] (3) Grind the pipe after cutting to make the bevel angle and the surface of the incision smooth. ;
[0053] (4) The inner wall of the butt weld must be flush; when assembling, place the weldment firmly to avoid additional stress or deformation during welding and heat treatment;
[0054] b. Pipeline welding, including:
[0055] (1) Pipeline preheating before welding: use electric hea...
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Abstract
The invention discloses a construction method for mounting a benzene hydrogenation engineering pressure pipeline, which is characterized by comprising the following steps of: a, pipeline machining; b, pipeline welding; and c, pipeline mounting: (1) pipeline prefabrication; (2) pipeline prestretching; (3) heat tracking pipe and jacketed pipe mounting; (4) bracket and hanging bracket mounting; (5) valve mounting; (6) pipeline flange, spacer and flange fastener mounting; (7) pipeline compensation device mounting; and (8) electrostatic grounding mounting. The construction method for mounting the benzene hydrogenation engineering pressure pipeline, provided by the invention, has the advantages of reasonable operation step design, simplicity in operation, safe and reliable engineering quality and reduction of engineering construction cost.
Description
technical field [0001] The invention relates to a method for installing and constructing a chemical process pipeline, in particular to a method for installing and constructing a pressure pipeline in a benzene hydrogenation project. Background technique [0002] The process of the benzene hydrogenation unit is quite special. The process medium pipeline is the delivery pipeline for the production unit to transport the medium, and it is the link connecting the various units to form the production capacity. The transported medium mainly includes crude benzene, light benzene, heavy benzene, and hydrogenated oil. , distillate, solvent oil, hydrogen sulfide, aromatics, non-aromatics, tar light oil, digested toluene, benzene-toluene fraction, pure benzene, xylene, reaction components, reaction products, steam, condensed water, nitrogen, compressed air, Industrial wastewater, exhaust gas and other media, most of these media are toxic, flammable, explosive, high-temperature, high-pres...
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