In order to study the accumulation pattern of liquid in welding seams of natural gas pipelines,an air-liquid two-phase experimental loop was set up,and natural gas pipeline welding seam liquid simulation experiments were conducted to study the influence law of different factors on the accumulation situation of welding seams.The results show that at high flow velocity and small inclination angles,the weld fluid accumulation area tends to increase with increasing moisture content.However,at an inclination angle of 30°,the weld fluid accumulation area tends to increase first and then decrease with increasing moisture content.At a small inclination angle,the weld fluid accumulation area tends to increase with increasing gas flow velocity at high moisture content.But at an inclination angle of 30°,the weld fluid accumulation area tends to increase first and then decrease with increasing gas flow velocity at high moisture content.At high moisture content,the weld fluid accumulation area tends to increase with increasing inclination angle at a flow velocity of 12 m/s.At a flow velocity of 16 m/s,the weld fluid accumulation area tends to decrease with increasing inclination angle.
Natural gas pipelineInternal corrosionWeld pondingInclination angleMoisture contentGas flow velocity
NETL
NSTL
万方数据
