过程管道设计（Process piping design）.doc

过程管道设计（Process piping design） This article is contributed by xcax1314 DOC documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view. Piping design The design basis of a pipeline Grading and classification of GB 1 pipeline industrial metal pipe construction and acceptance specification (GB50235-97) without pipe specific classification or grading, classification and definition of pipeline conveying fluid but clear. 1 (1) defines the level (1) of highly toxic fluids in the form of fluid toxicity - the poison of the first degree of harm in the classification of occupational exposure to toxicant levels in the current national standard. (2) toxic fluid - the poison in the secondary and secondary levels of the national standard. (3) combustible fluid - a gas or liquid that can be ignited and continuously burned under operating conditions. The national standard for conveying various fluid pipelines over different provisions of the inspection and construction requirements of pipeline components, such as valve test requirements: highly toxic, flammable and toxic fluid fluid, fluid pressure and valve design or 1MPa design pressure is less than 1MPa, and non combustible, design temperature less than 186 DEG C or -29 non-toxic fluid pipeline the valve to the conveying pressure and temperature in the 1MPa design -29 to 186 DEG C, non-toxic non flammable fluid pipeline as a class into another type of valve. (two) pipeline weld radiographic examination, GB50235 will be divided into three kinds of pipes (1) the first kind of pipeline weld need 100% radiographic inspection, weld quality is not lower than grade II pipeline, pipeline belongs to this category include: the following four kinds of pipeline pipe conveying fluid conveying the poison; design pressure greater than or equal to 10MPa, or design pressure equal to 4MPa and the design of flammable fluid temperature is greater than or equal to