Its process is: tube billet – inspection – peeling – inspection – heating – perforation – pickling – grinding – lubrication air drying – welding head – cold drawing – solution treatment – pickling – pickling passivation – inspection – cold rolling – degreasing – cutting – air drying – internal polishing – external polishing – inspection – marking – finally to the finished product packaging.
Seamless steel pipe is a long strip of steel with a hollow section and no joints around it. It is made of steel ingot or solid tube blank through perforation to make wool tube, and then made by hot rolling, cold rolling or cold drawing. The steel pipe has a hollow cross-section and is widely used as a pipeline for conveying fluids, such as pipelines for conveying oil, natural gas, gas, water and some solid materials.
From 2006 to 2008, U.S. imports of seamless steel pipes from China increased 131.52 percent to about $382 million. In October 2012, China’s seamless steel pipe production was 2.48 million tons.
The use of steel pipes was started by a Scottish inventor in 1815 to connect the barrel of a gun for the delivery of light gas. It was not until 1885 that the Mennesmann brothers invented the process of producing seamless steel pipes directly from bar steel.
The mechanical properties of steel are important indicators to ensure the final service performance of steel (mechanical properties), which depends on the chemical composition of steel and heat treatment system.
In the steel pipe standard, according to different requirements, tensile properties and hardness, toughness indicators, as well as high and low temperature properties required by users.
Seamless steel pipe Seamless steel pipe has a hollow section and is widely used as a pipeline for conveying fluids, such as pipelines for conveying oil, natural gas, gas, water and some solid materials. When the annular section is subjected to internal or external radial pressure, the force is more uniform, so the vast majority of steel pipes are round pipes
Post time: Jun-14-2023