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Pipe applicability testing device for conveying pipeline and test judgment method

A technology for conveying pipelines and testing devices, which is applied to measuring devices, analytical materials, instruments, etc., can solve problems such as applicability to be considered, technical difficulties in pipe applicability considerations, etc., and achieve the effect of reducing failure accidents

Active Publication Date: 2015-02-25
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
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  • Application Information

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Problems solved by technology

These methods have a common feature that small samples need to be cut out from the typical position of the steel pipe body or weld, and the stress state of the sample and the stress state of the steel pipe will change greatly, because structural factors also affect One of the main factors of corrosion resistance of pipeline steel, so the applicability of the test results obtained by these methods in real service conditions needs to be considered
[0007] In addition, with the rapid development of pipeline steel development technology, large-strain pipeline steel, X90, X100 and other ultra-high-grade pipeline steel will be widely used in pipeline construction, which means that each oil and gas transmission pipeline is used in different regions The pipes will have great differences in chemical composition, structure, performance, etc., which will bring great technical difficulties to the applicability of the pipes in the real service state. At present, there is no device that can be integrated to solve this problem

Method used

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  • Pipe applicability testing device for conveying pipeline and test judgment method

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Embodiment 1

[0042] Taking the Second West-East Gas Pipeline as an example, during the construction of this natural gas pipeline, the trunk pipeline steel products involved include X80 steel grade, 1219mm pipe diameter, and the wall thickness distribution ranges from 15.3mm to 33.0mm, and in some strain-based design Large deformation-resistant steel pipes are used in the region. In addition, due to the large number of domestic pipeline steel suppliers, even for the same pipeline steel specification, the composition and structure differences may be more obvious. Although the second line of the West-to-East Gas Pipeline has evaluated the applicability of the transported gas, as the domestic environmental pollution problem is becoming more and more serious, the clean utilization of coal and other fossil energy is imminent. Coal-to-gas is transported from the place of production to the destination. Judging from the gaseous components of coal-to-gas, the components contain relatively high CO 2...

Embodiment 2

[0050] Taking the China-Myanmar natural gas pipeline as an example, the natural gas pipeline project passes through complex areas such as mudslides, landslides and earthquake liquefaction. The harsh geological conditions and complex transmission media make it necessary to adopt strain design for the steel pipes used in the China-Myanmar natural gas pipeline. In addition, due to the large number of domestic pipeline steel suppliers, even for the same pipeline steel specification, the composition and structure differences may be more obvious. Although the China-Myanmar natural gas pipeline has evaluated the applicability of the transported gas, if the natural gas gas components fluctuate, the existence of these gas components will bring new challenges to the applicability of the natural gas pipeline pipes.

[0051] In order to evaluate the applicability of the China-Myanmar natural gas pipeline in the process of transporting specific gases, the typical pipe materials are determin...

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Abstract

The invention provides a pipe applicability testing device for a conveying pipeline and a test judgment method. The method comprises the following steps: cutting test pipe rings from typical pipe body characteristic positions of the conveying pipeline, sequentially connecting the multiple sections of test pipe rings in a sealing manner to form a test pipe section, and adding plugs to form a closed test pipe ring system. An actual conveying medium can be input into the closed test pipe ring system and can be properly pressurized, and main parameters of a medium in the test pipe ring system are monitored by virtue of an integrated sensor arranged in the test pipe ring system and can be adjusted in real time by virtue of an integrated instrument and a control device, so that operating parameters and a real service environment of the pipeline can be accurately simulated, and finally, pipe bodies, welding lines and other characteristic positions of the test pipe rings are sampled and analyzed by combining experimental design. Moreover, the pipe applicability of the conveying pipeline can be comprehensively and accurately evaluated, and the probability of conveying pipeline failure accidents caused by the pipe applicability problem is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of pipelines in the petroleum and natural gas industry, and relates to a pipe applicability testing device and a testing and judging method for pipelines. Background technique [0002] The increasing demand for energy worldwide has greatly promoted the pace of construction of high-pressure transmission pipelines. With the substantial increase in the demand for oil and gas resources, all countries in the world have increased the amount of oil and gas resources to be exploited to meet market demand. Hydrocarbon resources in many oilfields contain H 2 For acidic corrosive media such as S, although the oil field will purify the oil and gas before long-distance pipeline transportation, stress corrosion and hydrogen-induced cracking accidents caused by acidic service environments still occur from time to time. [0003] In addition, as the problem of environmental pollution in our country is becoming more and mor...

Claims

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Application Information

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IPC IPC(8): G01N17/00G01N33/00
Inventor 李炎华吉玲康罗金恒池强熊庆人杨放胡美娟张继明
Owner BC P INC CHINA NAT PETROLEUM CORP