Do you know what is a steel tube?

Do you know what is a steel tube?Do you know what is a steel tube adapter?And how much information you know about it?In our daily life,we often use it.It is in everywhere.

A post-yield hardened steel tube, particularly useful for creating slotted liners, for use in various applications in the oil and gas industries. The steel specifications meet the broad API 5CT standard, but the resulting slotted tube exhibits both enhanced slot-ability characteristics and superior thermo-mechanical characteristics in buckling resistance and localization resistance. A method of manufacturing a steel tube with substantial post-yield hardening behavior across a temperature range between room temperature and 350° C. while providing good slot-ability, comprising using a steel meeting the broad API 5CT standard but with very small quantities of sulfur, performing a standard hot rolling process followed by a specifically defined heat treatment cycle, so as to create a microstructure characterized either ferrite plus pearlite or a ferrite plus bainite-pearlite.http://www.seekpart.com/power-transmission/other-power-transmission-parts/Steel+tube+adapter.html