?? Shandong shunxinda Machinery Co., Ltd. (13969559358) is located in Liaocheng Economic Development Zone, Jiangbei water city with beautiful scenery. It is a company specializing in the production, processing and sales of precision seamless pipe, cold drawn precision seamless pipe and cold-rolled precision seamless pipe
Economy of pipeline construction and safety and reliability of operation
The construction of oil and gas transmission pipeline is essentially a large-scale welding forming (pipe making) and long-distance welding and installation engineering (site girth welding). Affected by the inherent characteristics of the welding process, the welding joints are often at present. The historical review of Baosteel Q345B precision bright pipe in the past ten years and the development of national Q345B precision bright pipe have experienced from simple to deep, From low to high understanding of the historical process. There are four stages in the process of preparing domestic Q345B precision bright tube in China: the era of using 16Mn to build a large number of pipelines in 1960s and 1970s. 16mnq345b precision bright pipe is used in Sichuan natural gas pipeline, Daqing Dalian and Daqing Beijing oil and gas long-distance pipelines, which are non pipeline steel, ? The grade of Q345B precision bright pipe is low, and there is no requirement for the low temperature toughness of steel pipe; Due to the welding quality problems of Q345B precision bright pipe in pipeline application, hydrogen induced delayed crack and embrittlement of welding coarse product area appear in welding joint. Based on the influencing factors, this paper discusses the relevant control methods, which has certain practical reference value for high-quality pipeline construction and safe and reliable operation of transmission pipeline. With the construction and operation of a large number of long-distance, large diameter, high-pressure pipeline. Cylindrical shell with nozzle is one of the commonly used structures in pressure vessels and piping systems. It is widely used in industrial fields, such as pipeline transportation system, atomic power engineering, petrochemical industry, aerospace and architecture. However, due to the changes of geometric parameters, manufacturing methods and types of applied loads, the calculation of deformation and local stress field in the opening nozzle region becomes very complicated. Therefore, the systematic analysis of the structure is of great engineering significance, and the research work in this field has become one of the common concerns in the pressure vessel technology field since the 1950s.
Due to the geometric discontinuity of Q345B precision bright tube, different loads (internal pressure, external pressure, instantaneous load and temperature) will lead to local stress and high stress concentration. In addition, it is difficult to weld and detect the joint, which makes the area become the dangerous point and damage source of the whole structure. In this paper, the plastic failure law, ultimate load, burst pressure and failure location of cylindrical shell with radial nozzle under internal pressure are studied by experiment and three-dimensional finite element analysis. The main contents of this study are as follows: 1. Under the action of internal pressure, the strain value of the key parts of the structure is measured by testing the cylindrical shell structure with different nozzle positions, and the ultimate pressure is studied by drawing the load-strain curve. 2. ANSYS simulation software was used to establish the vessel model with the same structural parameters as the experimental model, and the corresponding analysis results were obtained by 3D nonlinear finite element analysis.
?? The company reserves a variety of specifications of precision seamless pipe, cold drawn precision seamless pipe, cold-rolled precision seamless pipe, perennial business in Tianjin, Baotou Steel, Baosteel, Hengyang, Angang, Chengdu, Yegang, Lubao, Anyang, Jiangyin, Hongdu and other high-quality seamless steel pipe, alloy steel pipe, high-pressure boiler pipe, alloy high-pressure seamless pipe, thick wall seamless pipe, fluid pipe, structural pipe, chemical fertilizer special pipe, Petroleum cracking pipe, low pressure boiler pipe, large diameter seamless pipe, large diameter welded pipe, precision steel pipe, etc. The materials of common resources are: 10 กม 10, 20 กม 10, 45 กม 10, 16Mn, 27SiMn, 12Cr1MoV, 15CrMo, 12Cr1MoVG, 15CrMoG, 10CrMo910, 20Cr, 40Cr, 35CrMo, 304, 316, 316L, 310S, 309S, etc.