Current Production Situation and Development of Seamless Steel Tubes for High Pressure Vessel Service

Described in the paper are the commonly-used steel grades and the current situation of the manu-facturing processes for three types of high pressure vessel seamless steel tubes, i.e., the ordinary tube, the CNG-purpose tube and the accumulator-purpose tube which are mainly demanded in the market at present. Also involved are the development high lights and customer requirements for the said tubes over the recent years. It is emphasized that to improve the overall quality and expand the variety of this kind of specialty tube, some possible measures should be employed, including upgrade of steel melting and refining technologies for better steel cleanness and employment of the latest generation of tube-rolling processes like MPM process for better product dimensional accuracy and surface quality.