On the base of foreign advanced assessment standards, we have developed the assessment system of remaining strength for long-distance transported pipeline in use, take the present situation of long-distance transported pipeline in use in our country into consideration.

Synchronization Phenomenon in Process of Water Hammer in Long Distance Pipelines;

Laser welding technology of long distance pipeline;

Off-line simulation of the batching products in long-distance pipeline;

Study of numerical simulation of drag reduction of long-distance pipeline groove based on PHOENICS;

Noise reduction of signal and condition recognition of long-distance pipeline

Use AHP(Analytical Hierarchy Process,shortened as AHP)to identify and classify reasons that affect long distance transmission pipeline circularity weld quality.

Safety evaluation of reliability of on-duty long pipeline in different operation period;

The fluorocarbon coatings for steel structure in terminal yard of long pipeline are prepared to solve the problem of the serious corrosion and hard-to-refinishing.

Purpose: discussion on effect o noise on workers’hearing in the long pipeline fieldwork.

A quantitative method of risk assessment of natural gas pipeline;

Based on experimental analysis, an effective method for waxy crude pipelining technology is determined and experimental case is given for the pipeline with 7km submarine section.

Under the influence of various factors, cracks and erosion may take place on pipeline and wall thickness of pipeline may become thinner, which might lead to oil and gas leak.