Inspection method for pipeline surface treatment quality
An inspection method and surface treatment technology, applied in the field of inspection of pipeline surface treatment quality, can solve problems such as hidden dangers in operation safety, insufficient and inability to screen out finished pipelines with surface treatment quality
Pending Publication Date: 2021-12-28
PETROCHINA CO LTD
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Although the quality inspection of the surface treatment before coating can achieve the quality control of the coating to a certain extent, it is often not enough
After the steel pipe surface is coated with a three-layer anti-corrosion structure, especially when the three-layer anti-corrosion structure peels off during the use of the finished pipeline, it is often impossible to trace back to the treatment quality before the steel pipe surface is coated with a three-layer anti-corrosion structure, resulting in Party A being unable to screen For finished pipelines with surface treatment quality, when the three-layer anti-corrosion coating structure fails in the finished pipeline, the surface treatment quality before the surface coating of the steel pipe cannot be reviewed, and it is necessary to bear huge cost losses and hidden dangers to operational safety
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
[0043] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the implementation manners of the present disclosure will be further described in detail below in conjunction with the accompanying drawings.
[0044] Oil and gas use pipelines as a means of transportation to achieve long-distance transportation from production sites to markets. Oil and natural gas are flammable and explosive dangerous goods, which are prone to explosion, leakage and heat radiation due to changes in pipeline corrosion, internal pressure and impact force. Therefore, pipelines need to have good corrosion resistance and water resistance. gas permeability and mechanical properties. At present, the pipeline is realized by 3PE anti-corrosion steel pipe. figure 1 A schematic structural view of a 3PE anti-corrosion steel pipe provided by an embodiment of the present disclosure. see figure 1, The 3PE anti-corrosion steel pipe includes a steel pipe 10 and a three...
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
| Property | Measurement | Unit |
|---|---|---|
| length | aaaaa | aaaaa |
Login to View More
Abstract
The invention provides an inspection method for pipeline surface treatment quality, and belongs to the field of pipeline protection. The inspection method comprises the following steps: providing a pipeline sample, wherein the pipeline sample comprises a part of pipe wall of a steel pipe and a three-layer anti-corrosion structure formed by epoxy powder, an adhesive and polyethylene, and the surface of the steel pipe is sequentially coated with the three-layer anti-corrosion structure; freezing the pipeline sample, and reducing the temperature of the pipeline sample to be below a set temperature; bending the pipeline sample, wherein the bending angle of the pipeline sample is larger than a set angle, so that at least part of the three-layer anti-corrosion structure is separated from the surface of the steel pipe; cutting out the three-layer anti-corrosion structure on part of the surface of the steel pipe, so that part of the surface of the steel pipe is exposed; and testing the cut three-layer anti-corrosion structure and the exposed part of the surface of the steel pipe so as to determine whether the surface treatment quality of the steel pipe is qualified or not. According to the invention, steel pipe surface treatment quality inspection can be carried out on the finished steel pipe coated with the three-layer anti-corrosion structure.
Description
technical field [0001] The disclosure relates to the field of pipeline protection, in particular to a method for inspecting the surface treatment quality of pipelines. Background technique [0002] Oil and gas pipelines are generally implemented with 3PE (ThreeLayerPolyethylene, Chinese full name: three-layer structure polyethylene) anti-corrosion steel pipes. 3PE anti-corrosion steel pipes include steel pipes and FBE (full name in English: Fusion Bonding Epoxy Powder Coatings, full name in Chinese: Fusion Bonding Epoxy Powder), AD (full name in English: adhesive, full name in Chinese: adhesive), and PE coated on the outside of the steel pipe in turn. Three-layer anti-corrosion structure. This three-layer anti-corrosion structure has good corrosion resistance, water vapor permeability resistance and mechanical properties, which are crucial to the service life of oil pipelines. [0003] At present, the failure of the three-layer anticorrosion structure is usually separated ...
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 Applications(China)
IPC IPC(8): G01N33/208G01N1/42G01N1/28
CPCG01N33/208G01N1/286G01N1/42
Inventor 冯少广李东阳刘国豪赵君翟星月刘阳穆承广潘腾姚腾飞王乾坤张宏亮杨杨吴迪
Owner PETROCHINA CO LTD