| How to distinguish hot expansion pipe and seamless steel pipe
The company simply to introduce you how to expand the hot expansion machine and seamless steel pipe distinction.
Hot expanding steel pipe is only a kind of pipe expanding manufacturing process, welded pipe and seamless steel pipe can be hot expanding.
How to distinguish what is hot expansion tube machine: can be in the appearance of steel pipe, hot expansion is red, inside the diameter is lead powder.
We often say that the hot tube expanding machine refers to the steel pipe with low density but strong shrinkage, (seamless steel pipe) can be referred to as the hot tube expanding. A finishing rolling process in which the diameter of pipe is enlarged by cross rolling or drawing. In a short time to make the steel pipe thickening, can produce non-standard, special type of seamless pipe, and low cost, high production efficiency, is the development trend of the field of rolling pipe all over the world.
Seamless steel tube: The product is made of excellent coil plate, the slitting or rolling is automatically formed and fused after reinspection. At the same time, the computer controls the best melting temperature, and removes the inner and outer burr of the steel pipe. The steel pipe qualified for nondestructive testing is heated to 910℃-950℃ in the atmosphere of very little oxidation. The microstructure, grain state, geometric size and mechanical properties of the steel pipe are all uniform.
Want to make a difference between the two can also be seen in the appearance of the steel pipe, hot expansion is red, inside the diameter is lead powder.
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