How to identify the quality of polyurethane insulation steel pipe?
Release time:
07 Jun,2023
With the application of polyurethane insulation steel pipe more and more widespread, many shoddy polyurethane insulation steel pipe began to flow into the market, in order to avoid buying to shoddy polyurethane insulation pipe, on the introduction of how to identify the quality of polyurethane insulation steel pipe.
With the application of polyurethane insulation steel pipe more and more widespread, many shoddy polyurethane insulation steel pipe began to flow into the market, in order to avoid buying to shoddy polyurethane insulation pipe, on the introduction of how to identify the quality of polyurethane insulation steel pipe.
Shoddy polyurethane insulation steel pipe often has the appearance of pockmarked phenomenon. The pockmarked surface is caused by the rolling groove wear serious polyurethane insulation steel pipe surface irregularities of the bumpy defects. As a result of shoddy polyurethane insulation steel pipe manufacturers to pursue profits, there are often rolling groove rolling overruns.
Shoddy polyurethane insulation steel pipe surface is prone to cracks, the reason is that its billet is adobe, adobe porosity, adobe in the process of cooling due to the action of thermal stress, resulting in cracks, after rolling on cracks.
Shoddy polyurethane insulation steel pipe of the crossbar thin and low, often appear to fill the phenomenon of insufficient, the reason is that manufacturers to achieve large negative tolerances, the finished product of the first few press down the amount of large, iron type is small, the hole is not filled.
Polyurethane insulation pipe of uniform composition, cold shear high tonnage, cut head end surface smooth and neat, and shoddy material due to poor material, cut head end surface often have the phenomenon of falling meat, that is, uneven, and no metallic luster. And because of the shoddy material manufacturers products cut head less, the head and tail will appear large ears.
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