Pickling is an important step during the seamless steel pipe production. And there is difference for cold drawing and hot rolling in this step. We need to pay attention to it, thus we will provide suitable and high quality pipelines for our clients.
Generally speaking, we should take notice that if there is a large amount of foaming on the surface. As this may lead to the wrong standard for pipeline which will have influence for quality.
Appearance: Cold-rolled pipe is shorter than that of hot-rolled pipe.
Wall thickness: The wall thickness of cold-rolled pipe is generally smaller than that of hot-rolled pipe.
Surface looks: The surface looks brighter than thick-walled seamless steel pipe.