The article makes investigation and analyzes the quality of pipeline coating with asphalt in combination with cathodic protection.
对采用阴极保护和沥青防腐层联合防护的管道防腐层质量进行了调查分析。
Excavating is to confirm the result of detection to buried pipeline coating, and to evaluate the tools of each kind of indirect detection.
埋地管道开挖是为了验证外防腐层检测结果的准确性，是对各种间接检测工具的最好评价。
Three pipeline coating detection technologies, multiple-frequency current method, ground potential-electrical field method, and pipe-to-soil potential method, are introduced.
本文在分析国内外现有的防腐层检测技术的基础上，提出了地下金属管线防腐层状态检测的新方法----电流梯度法。
This paper introduces the test principles and the technical advantages of alternating current impedance test method for testing the anti-corrosion properties of pipeline coating.
本文介绍了交流阻抗试验方法测定管道和大型油罐防腐涂料防腐性能的优点及测试原理。
The purpose of conducting periodical pipeline coating inspection over submarine pipelines is to ensure its safe operation and prevent oceanic environment pollution due to leakage.
海底管道检测的目的是通过定期和特殊的检测，保证管道安全运行，防止油气泄漏，保护海洋环境。
Equivalent circuit model corresponding to buried pipeline system is analyzed, which laid firm foundations of electrochemistry theory application to the detection of pipeline coating faults.
研究了埋地管道体系的等效电路模型，为将电化学理论应用于管道涂层缺陷检测打下了坚实基础。
To inspect and maintain the coating for buried pipeline and jetty stakes.
负责埋地管道、站场和阀室埋地管道、码头钢桩涂层的检测和维护工作。
Asphalt paint coating is used to transport gas pipeline. Preheating before painting can improve the adhesion of asphalt paint, accelerate drying.
沥青漆涂层是用于输送燃气的管道。喷漆前对管子进行预热可以提高沥青漆的附着力，加速干燥。
At present, the domestic production lines for concrete weight coating of submarine pipeline are basically imported.
目前，国内管道混凝土配重涂敷厂的生产装备基本为国外进口。
External corrosion coating is a main corrosion prevention measure of buried steel pipeline, with cathodic protection being complementary.
外防腐涂层是埋地钢质管道主要防腐手段，阴极保护是涂层防腐的补充手段。
This paper analyzes the reason of corrosion on COG pipeline and describes the feature and situation of MH 1 type anticorrosive coating.
分析了焦炉煤气对管道的腐蚀原因，介绍了MH-1型防腐涂料的特点及其情况。
When coating surface resistivity test on a longer pipeline is conducted, the pipeline can be divided into several sections to calculate it with polarization potential and current density.
在对长管道的涂层面进行电阻率测量时，可将管道分成若干段，通过极化电位和电流密度对涂层电阻车进行计算。
The intelligent pigging exposed that the asphalt coating deteriorated to a great extent in Rongshan-Foyin gas transmission pipeline.
通过对榕山—佛荫输气管道进行智能检测发现，管道石油沥青防腐层损坏严重。
Internal coating used in high pressure, large diameter and long distance gas pipeline has two main functions, one of them is anti corrosion and the other is drag reduction.
高压、大口径、长输天然气管道采用内涂层主要具有两大功能，一是防腐蚀，二是减阻。
The application of TEM inspection system is introduced for high temperature and high pressure pipeline of oil field without destroying coating.
本文介绍了在不拆除现有保温层的情况下，TEM检测系统在油田高温高压管道中的应用。
With joint protections of coating and cathode, the buried steel pipeline will still be corroded and penetraded on some pipe surfaces.
埋地钢质管道在防腐层、阴极防腐的共同保护下，钢管的某些区域仍会被腐蚀穿孔。
The explanation is given to the importance of the quality control over anticorrosive coating of oil and gas pipeline.
本文论述了油气输送管道防腐涂装质量控制的重要性；
The result indicates that the current in the pipeline with good coating is larger than that for polarization.
结果表明均压线中有电流流过，防护层性能好的管道能够起到分流的作用。
The application of pipeline inside coating anticorrosion technology to repairing old pipeline system is introduced.
介绍了一种风送涂挤防腐蚀工艺在修复油田老区旧管线中的应用。
The gouge resistance of three kinds of pipeline external coating was evaluated by using gouge test and data analysis of reliability.
通过划伤试验和测试数据的可靠度分析，研究了三种管道外防护层的抗划伤性能。
This coating technology can improve pipeline operation efficiency, reduce costs and prolong pipeline service life, so it is suitable for the internal corrosion control of short distance pipelines.
这种方法可提高管道输送效率、降低成本、延长管道使用寿命，比较适合于短距离的管道内防腐。
When intersected with electric line, the coating of the pipeline will be aging due to secondary voltage inducted.
管道与电力线交叉时，由于感应二次电压而使管道防腐层老化。
Pipes with internal coating have been used widely in the world for gas pipeline for past over 50 years because of many advantages.
由于内涂层管子具有很多优点，5 0多年来它在天然气输送管道中得到了广泛应用。
The corrosion of pipeline was found to be result of leak-in of air and water due to the damages of steel pipelines' protection coating.
造成管道腐蚀的根本原因是金属管道防护层遭到损坏进入水分和空气所致。
The pipeline during the initial production run smoothly, but in 2007 and 2008 successively in Lunnan and Hami gas compressor station found a coating failure, corrosion and leakage of buried pipeline.
投产初期管道运行平稳，但2007和2008年相继在轮南和哈密压气站内发现了防腐层失效，埋地管道腐蚀和泄露的情况。
This article describes four examination methods and their application to pipeline outer protective coatings, and evaluation of disrepair points of coating and cathodic protection system.
本文介绍四种管道外壁防护层检测方法及其在该管道检测中的应用，通过检测，对该管道的外防护层缺陷与阴极保护系统作出分析评价。
The article discusses the advantages of inner coating of gas pipeline, and introduces the characteristics and application of the steel pipe with organic coating.
论述了管道内涂层的优越性，介绍了有机涂层钢管的特性及应用。
The inner coating stress of pipeline is less than the outer coating stress.
管道内瓷层的受力状态好于管道外瓷层。
More and more epoxy powder has been used as external coating on buried steel pipeline at home in recent years.
近年来，国内埋地钢质管道的外覆盖层已越来越多地使用了环氧粉末。
The comprehensive detection method and the classification evaluation method for external anticorrosion coating of municipal buried gas pipeline are discussed.
论述了城镇埋地燃气管道外防腐层的综合检测方法与分级评价方法。
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