Seamless steel tube for gas transmission is usually large diameter seamless steel tube, and if large diameter seamless steel tube has a particularly large diameter, it needs thermal expansion.


Seamless steel tubes for gas transmission are usually heated to expand the diameter of the tube. The amount of expansion depends mainly on the diameter of the steel pipe to be produced. Seamless steel pipes for pipelines can be treated by anticorrosion and heat treatment according to the service environment. The main types of anti-corrosion are 3pe, epoxy coal tar asphalt, epoxy powder, etc. The main insulation types are polyurethane foam and steel sleeve composite insulation pipe. The choice of process depends on the specific use conditions and environment.