Pipelines are key pieces of infrastructure for Oil and Gas, Water and Wastewater, Hydroelectric, Coal Generation, Nuclear Generation, Irrigation and Manufacturing industries.
There are millions of miles of pipeline carrying everything from water to crude oil all of our cities.
In an attempt to keep pipelines operating safely, people must arrange periodic inspections of pipelines, choose professional assessment procedures on detection of operations to verify the status of the pipelines, and all steps are performed to find flaws and damage before they starting a concern and make a repair or replace in time.
In fact pipelinesare vulnerable to attack by internal and external corrosion, and may meet some matters caused bycracking, third party damage and even manufacturing flaws. If a pipeline carrying water springs a leak bursts, it can be a problem but not serious as it usually doesn't harm the environment too much. However, if a petroleum or chemical pipeline leaks, it most likely to becomea environmental disaster.
Therefore, pipeline inspection is a very important and professional work.All pipeline inspection should also comply with applicable rules and regulations to avoid errors during detection process, so as to reduce any risk of spills or contamination.
When NDE(non-destructive examination) is required, the method, equipment and operational specifications that must be same explicitly used in the contract documents. Then the process extent, techniques and standards of acceptance must be clearly defined accordingly.
Pipeline inspection can be divided internal and external pipeline inspection. Different types of inspection and monitoring methods depend on the actual situation and the piping system. Thus people could use of different test ways and tools. And there are many manufacturer companies who have been in their application areas to develop different professional pipeline inspection equipment. It is workable for users to arrange short and long-range inspections under various operating conditions.
Normal inspection services include channel crossing inspections, internal pipe inspections of non-piggable lines, internal inspections of pressure piping and subsea line evaluations etc.
People may use visual, X-ray, magnetic particle, ultrasonic and other inspection methods to evaluate the pipelines and ensure that they are of high quality.These inspections are performed as the pipeline is being constructed or just be built, so gaining access the inspection area is not a problem.
However, once the pipeline is put into use, you can no longer do the excavation or disable, even if thedewatered pipe is the same case, about which we can learn the reason easily. How do you inspect a buried pipeline? Therefore we need to purchase the corresponding professional inspection tools, also training inspectors the detection skill.
The method to be used is established after consideration of the feasibility as well as the defect identification capability and relative cost of each method. And the purpose is to build a scientific and efficientpipeline inspection system. It should include the following summary content:
Types Of Inspection
Organization and reports of structure for inspection personnel.
Documentation and maintenance of inspection and quality assurance procedures.
Documentation and reports of inspection and test results.
Corrective action for inspection and test results.
Internal audits for compliance with the quality assurance inspection manual.
Review and approval of drawings, design calculations, and specifications for repairs, alterations.
For larger diameter pipes, a robotic pipe inspection system can be used for it is applicable to water, wastewater, industrial and power applications and so on.It stands at the forefront of advanced NDE techniques.
For small diameter pipelines, there are borescopes and videoscopes portable inspection camera toolscan be used to check the inside of the pipe - this is a non-destructive test（NDT） that we inspect inaccessible areas for defects without harming them. And we can also increase the steering design at the far end, or some useful accessories. We couldtake camera, video recording, data transmission, detection and analysis, as well as crawling, cleaning and other simple channel maintenance functions. Some of such snake tube borescope tools have structural health monitoring technology with wireless capability. It will extend the life of pipelines with professional water, waste water, raw water, fire water, cooling water and slurry pipeline inspection technology.
And on some pipelines it is easier to use remote visual inspection equipment to assess the condition of the pipe.Several non-destructive methods can be used for inspection. Sometimes referred to as a PIG (pipeline inspection gauge),most of them use a magnetic flux leakage method but some also use ultrasound to perform the inspections. And laser-based pipe Inspectionthe creation of an inspection process for instance there is inspection tool of pipelines in the oil and gas industrywhich use a laser scanner, some motorized axes, and a video camera, allowing the operator to rotate the video camera freely. The entire process of lining up the instrument, scanning, and analyzing the results can be completed in a few minutes.
Now many water, wastewater, and other pipeline owners around the world who have used professional state of the art In-Line Inspection Tools to help them assess the condition of their pipelines. Only by knowing the precise condition, can asset managers make informed decisions to repair, rehab or replace their pipelines.
After all, there is an obligation on terminal and pipe line owners to ensure it is used in a safe manner and this requires an effective inspection and maintenance program. Owners is responsible for developing, documenting, implementing, executing, and assessing pipe line inspection systems and inspection procedures that will meet the relevant requirements.
More pipeline Inspection &conditionanaysisservices updated in next article.