The inspection method can be to use soapy water to wipe the gaps of the joints of the annealing furnace to see if there is air leakage; the places where the air is most likely to escape are the place where the annealing furnace enters the pipe and the place where the pipe exits.
Cold drawing is to draw the metal pipe with a cold drawing machine without heating. The advantage is that it does not need to be carried out at high temperature.
The raw material of precision seamless steel pipe is stainless steel tube billet, which is a finished stainless steel seamless pipe after cold drawing or cold rolling, annealing and pickling.
There are 20 different steel grades and types of oil casing and tubing in H40, J55, K55, M65, N80, L80, C90, T95, C95, P110, Q125. In order to distinguish the strength and thread type of different steel grades
From August 1, 2021, the export tax rebate for all steel products will be cancelled. At this time, the export of all thick-walled seamless steel pipes will not enjoy the tax rebate policy.
Oil casing is a steel pipe used to support the walls of oil and gas wells to ensure the normal operation of the entire oil well after the drilling process and completion. Each well uses several layers of casing according to different drilling depths and geological conditions.
