According to Schwarz-Christoffel transformation theorem,the relevant mathematical model is presented for the distribution of magnetic leakage field covering magnetic section of steel pipe seam.

Present Status and Development of Alloy Steel Seamless Tube;

Analysis on stretch reducing rolling process of seamless tube by FEM;

Development of round billet of heat resistant stainless steel seamless tube for high pressure boiler

Technological transformation of enterprises produced medium diameter seamless steel tube with cold drawn processing;

Discussion on development countermeasures to seamless steel tube technical equipment in China;

Present situation analysis of Chinese seamless steel tube technology equipment;

Finite element analysis on locally and radically die plastic forming of the seamless steel pipe;

Study of heat treatment process of 1Cr5Mo alloy seamless steel pipe;

Analysis for Inside Cold-Bending Fracture of SA299 Heavy Calibre Thick-Wall Seamless Steel Pipes;

Effect of sizing measure and temperature on residual stress of the seamless pipe in the sizing process;

Effect of size and temperature on residual stress of the seamless pipe in the sizing process;

Analysis of quenching residual stress of seamless pipe by FEM;

Commentary on the standard of seamless steel tubes for boiler;

Discussion on the technical index of GB/T 8163-1999 seamless steel tubes for liguid service,make suggestions on organizing production of seamless steel tubes for liguid service.

The traditional method for measuring the geometric sizes of seamless steel tubes is mechanically and manually test on the both ends of tubes, which could not meet the requirement of modern industry for high accurate steel tubes .