Insulating sealing device and method for connecting flange type instrument equipment and tap part
A technology for extracting source parts, insulating and sealing, applied in the direction of flange connection, mechanical equipment, heat exchange equipment, etc., can solve the problem of accelerating the corrosion rate of flange pieces made of carbon steel, relying on on-site installation for sealing, and hydrostatic testing of insulating joints and other issues to achieve the effect of reducing equipment investment and construction costs, reducing construction procedures and materials, and improving safety and reliability
Inactive Publication Date: 2017-06-13
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
[0003] If the flange between the flanged instrument equipment and the flange of the pipeline source part is connected by a metal wound gasket between the flanges, bolts, nuts, and metal spring washers, although this method can meet the sealing requirements, due to the The connecting flange of the equipment is made of stainless steel, while the flange of the pipe source part is made of carbon steel. The two flanges are directly connected by a metal wound gasket. According to the electrochemical principle, the potential difference between the two flanges will be Accelerate the corrosion rate of flanges made of carbon steel, especially in the case of relatively poor natural environments, the electrochemical corrosion of flanges made of carbon steel will be faster, the impact of this electrochemical corrosion on flanges The gaskets, bolts, nuts and other installation accessories are also the same, which seriously affects the safe operation of the pipeline.
[0004] If the insulation between the flanged instrumentation equipment and the pipeline adopts the method of installing an insulating joint in the form of NPT thread on the instrumentation equipment, although this method can meet the insulation requirements, because the insulating joint and the instrumentation equipment are connected in the form of NPT thread , which additionally increases the installation space and overall weight of the instrument installation, especially the potential leakage point. Although the insulating joint is subject to the factory acceptance test (FAT), because its field installation position is above the instrument valve, the insulating joint cannot be connected with the instrument valve. Pipelines are subjected to hydrostatic tests together, and their sealing performance depends entirely on the effect of on-site installation, which poses a great potential safety hazard
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[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0028] An insulating and sealing device for connecting flange-type instrumentation equipment to source components, such as figure 1 As shown, the flange A9 of the instrument equipment 7 and the flange B10 of the source part 8 are both convex flanges, and the central connection surface of the flange A9 and the flange B10 is connected by a flange insulating gasket 6 made of insulating material. The circumference of the flange insulating gasket 6 is provided with a sealing groove, and a sealing ring is placed in the sealing groove; along the central connection surface of the flange A9 and the flange B...
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The invention relates to an insulating sealing device and an insulating sealing method for connecting flange type instrument equipment and a tap part, and belongs to technical field of pipeline systems. A flange A of the instrument equipment and a flange B of the tap part are both male flanges; the centre connecting surfaces of the flange A and the flange B are connected through a flange insulating gasket made of an insulating material; a sealing groove is formed in the circumference of the flange insulating gasket; a sealing ring is placed in the sealing groove; connecting ends of the flange A and the flange B are respectively formed along the circumference of the centre connecting surfaces of the flange A and the flange B; the connecting ends of the flange A and the flange B are connected by penetrating metal fastening bolts through flange holes. The insulating sealing device and the insulating sealing method for connecting the flange type instrument equipment and the tap part can eliminate electrochemical corrosion and improve the safety and reliability of pipeline operation, so that the pipeline construction tends to be more standardized, modularized and humanized; construction processes and materials are reduced; the operation and maintenance are facilitated; the equipment investment and the construction cost are reduced.
Description
technical field [0001] The invention relates to an insulating and sealing device and method for connecting flange-type instrumentation equipment and source components, and belongs to the technical field of pipeline systems. Background technique [0002] For the insulation and sealing of the connection of flanged instrumentation equipment in pipeline stations and valve chambers, previous projects have adopted the method of connecting flanges of flanged instrumentation equipment and flanges of pipeline source components through metal wound gaskets and bolts between flanges, Nuts and metal spring washers are connected to meet the sealing requirements of instrumentation equipment installation; the insulation between flanged instrumentation equipment and pipelines is realized by installing NPT threaded insulating joints on the instrumentation equipment. [0003] If the flange between the flanged instrument equipment and the flange of the pipeline source part is connected by a met...
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IPC IPC(8): F16L59/18F16L58/18F16L23/036F16L23/16
CPCF16L59/184F16L23/036F16L23/16F16L58/187
Inventor 陈子赓聂中文刘骁枭王七郎黄晶李佳
Owner BC P INC CHINA NAT PETROLEUM CORP