This paper analyzes the economic efficien- cy of LNG long-distance pipeline construction,introduces the process calculation of pipeline,selection of insulating layer,transportation technology,and cold contract and pre- cooling of pipeline,and forecasts the application foreground of LNG long-distance pipehne transportation in Chi.

According to the property of LNG pipe.

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.