Corrosion,Characteristics,weld technology Corrosion Characteristics of welded steel pipe
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1, Corrosion-resistant. Polyethylene is an inert material, except for a few strong oxidant, can withstand a variety of chemical media erosion.2, Without leak. Polyethylene welded steel pipe mainly welded connection (hot melt connection or fused connection), ensure that the interface material, structure and management body's own identity in essence, to achieve the integration of joint and pipe. Test confirmed that the tensile strength and burst strength of the interface was higher than the pipe body, can effectively resist the tensile stress in the pressure generated hoop stress and axial direction.3, High toughness. Polyethylene coating steel pipe is a high toughness of the pipe, which is generally more than elongation at break of 500%, based on the pipe's ability to adapt to uneven settlement is very strong. It is an excellent seismic performance of the pipeline.4, With excellent flexibility. Polyethylene flexible polyethylene tube can be coiled, and a longer length of the supply does not need all kinds of connecting pipe opponent, and it is easy to process in accordance with the requirements of the construction changes, but also changes in the pre-construction pipe shape, old tube inserted to restore the original size and dimensions.5, With a good ability to resist scratches. Studies have shown, PE80 grade polyethylene pipe has better resistance to SCG ability and scratch-resistant capability. PE100 polyethylene pipe materials are having a better ability to resist scratches.6, Good resistance to rapid crack pass. Polyethylene has excellent ability to transfer resistance to rapid crack. For the lower the temperature, the greater the diameter and wall thickness, the higher working pressure, rapid crack the plastic pipe the greater the risk characteristics. The polyethylene pipe, especially PE100 pipe more suitable for big diameter mild steel pipe. Currently, the standard polyethylene gas pipe foreign (IS04437-1997 and EN1555) has resistance to rapid crack growth (RCP) being included in the standard.7, Long service life. ≤60 under the conditions can be used for more than 50 years.
Corrosion,Characteristics,weld