Country：Nationwide,China
Business：House quality inspection, house seismic evaluation, industrial building inspection and evaluation, glass curtain wall inspection, bridge inspection, engineer…
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| I content of pipeline inspection 1 Pipeline detection and positioning 2 General inspection of pipeline 3 Leakage point detection of pipeline 4 Inspection of external anti-corrosion coating of steel pipeline: pipeline inspection includes external inspection and internal inspection 5 Insulation resistance test of anticorrosive coating 6 TEM (transient electromagnetic) testing technology for pipe wall thickness 7 TEM (transient electromagnetic) detection technology 8 Nondestructive testing 9 Cathodic protection operation parameter detection 10 Test of internal and external medium parameters of pipeline 11 Pipe safety assessment According to the current situation of pipeline inspection, corrosion, internal and external media and other factors, According to the evaluation method of corrosion damage evaluation method for steel pipe body (sy/t6151-1995) Corrosion damage size evaluation method and maximum safety pressure evaluation method are used to evaluate the pipeline in combination with seismic calculation and analysis 12 Propose solutions Through the comprehensive inspection of urban gas pipelines, including pipeline detection, pipeline to external anti-corrosion coating detection, pipeline corrosion environment assessment, gas leakage detection, etc , and gradually establish a comprehensive information management system for gas pipelines is the current development trend of gas pipeline maintenance, assessment and management Using comprehensive technical means, combined with pipeline environmental assessment, it can achieve good results in pipeline corrosion prevention detection and in-service condition assessment It provides a scientific basis for ensuring the good operation of the pipeline and future pipeline maintenance and repair 2、 Required instruments and equipment 1 Geological radar Detection and positioning 2 Gas pipeline detector Gas leakage 3 Ultrasonic detector Nondestructive testing 4 Spark leak detector Coating defects 5 Leakage detector for anti-corrosion coating of underground metal pipeline Detection, positioning and anti-corrosion detection 6 Underground pipeline detector Detection and positioning 3、 Detection process 1 Preliminary preparation Before the test, locate the pipeline on site, preliminarily understand the implementation of the project, collect soil test reports, and view relevant basic data, mainly including pipeline construction design drawings, adjacent pipelines and underground structures, pipeline anti-corrosion coating design, etc , and then conduct on-site survey to select detection methods and instruments 2 Field test Generally, the integrity test shall be carried out after the completion of the pipeline works Combined with the characteristics of the specific project, in order to find and solve the problems in time, and in combination with the requirements of the project period, it is determined that the detection method is to immediately implement the detection of the first section of pipeline backfilling The specific method is: before the pipe trench is backfilled to 0 5m from the top of the pipe and the pipeline warning tape is laid, the inspectors shall carry out the integrity inspection of the anti-corrosion coating 3 Data collation Data analysis shall be carried out immediately after the completion of the test, and a test report shall be issued If no problem is found after the test, the warning tape can be laid and other residual earthwork can be backfilled http://www chinajy-sh com cn/ |
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