Method for dealing repeated fracture of industrial pipeline caused by thermal stress
A technology for industrial pipelines and thermal stress, which is applied to pipeline systems, blast furnace parts, furnaces, etc., and can solve problems such as industrial pipeline fractures and faults
Inactive Publication Date: 2012-11-14
武钢集团有限公司
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the existing technology does not give a systematic quantitative analysis and judgment technical procedure for this kind of industrial pipeline fracture fault.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0068] The technical solution involved in the present invention is applied to the fracture repair of INBA system pipes of 6#-8# blast furnaces of WISCO.
[0069] Such as figure 1 , in the frequent fracture area of the pipeline involved in the case, take the middle point of the straight pipe section with a span of 35 meters between the two fixed supports as the stress release point; take this point as the center mark, extend 1 meter to both sides respectively, as two Jog point marker B d , with an interval of 2 meters; on the floor where the two moving point marks are perpendicular to each other, set the static point reference mark B j . In the interval marked by the moving point, select a pipe section Bf of an appropriate length, cut it off and pull it out. After measurement, the fact that the moving point moves inward to the static point is obtained, and the total amount is an inward extension of 7 mm (named ΔL 1 ). Based on this, it can be confirmed that before thi...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a method for dealing repeated fracture of an industrial pipeline caused by thermal stress. The method comprises the following steps of: judging a stress trend of the pipeline and quantifying a stress level thereof by testing an original deformation degree formed in a pipeline construction process; judging a limit expansion and contraction rate epsilon of an involved pipeline section according to a maximal temperature difference interval of a service environment of the pipeline; respectively quantifying various stress values borne by the involved pipeline section and amaximal cumulative stress intensity sigma respectively by using a linear rule of an elastic modulus E of a material; judging whether the involved pipeline section is safe by comparing the maximal cumulative stress intensity sigma with a usable intensity [sigma] of a pipeline material; and finally providing a measurable reinforcement scheme or a stress compensation scheme. The method has the advantages that: the analysis and the judgment of a pipeline fracture phenomenon in the field is converted into a quantitative analysis and judgment mode in a data form from a conventional experience judgment mode; and a practical solution is proposed.
Description
technical field [0001] The invention relates to a method for quantitative analysis, response and prevention of fracture faults of industrial pipelines, in particular to a method for coping with repeated fractures of industrial pipelines caused by thermal stress caused by temperature differences. Background technique [0002] In practical production, when the return water main pipe of some systems such as ironmaking blast furnace is running, frequent fractures of unknown reasons often occur. After many efforts, the on-site maintenance personnel are still unable to control the continuous occurrence of fracture events. The frequent occurrence of fracture failures without warning has seriously disturbed the production order of the blast furnace. To this end, a scientific analysis of the cause of the pipeline fracture was carried out. After excluding the hoop and longitudinal stresses during loading and the tensile stress imposed on the pipeline by the operating medium, the pipe...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F17D5/02C21B7/00
Inventor 孙华陶铭鼎吴良玉颜斌孙光军
Owner 武钢集团有限公司