Intensification can aggregate advantageous for the market, thereby improving operational efficiency. For standardized welded pipe products such as water and gas pipes and pipes for general building structures that are in high demand in the market, the technical requirements are relatively single, the specifications are...

The Central Economic Working Conference in December 2020 pointed out that China's carbon dioxide emissions will strive to peak before 2030, and achieve carbon neutrality before 2060. In the future, carbon peaking and carbon neutrality will be an important issue in the development of China's steel industry. As a...

Large scale and specialization Since the reform and opening up, especially in the past ten years, the production scale of welded pipes in China has continued to increase, and the production capacity has far met the quantitative needs of domestic economic growth. After the adjustment in 2018, the output of welded pipes...

The defects of OCTG mainly come from three aspects: defects of the OCTG itself, defects of the OCTG generated in the manufacturing and the use performance of the OCTG. Defects of the OCTG itself such as the mechanical properties and weighing of the OCTG not meeting the requirements. Defects generated in the manufacturing...

The performance of OCTG pipes includes anti-collapse, anti-corrosion and perforation performance. (1) Anti-collapse performance With the increase of drilling depth, the pressure of oil pipes and casings in oil and gas wells increases, especially in deep wells, ultra-deep wells and plasticity running ground such as rock...

The tube's rolling process is the main process to determine the wall thickness of the seamless steel tube, and its function is to reduce the wall of the perforated billet. The main defects are uneven wall thickness of pierced billets, cracks on surfaces, pits, scratches, puncturing and so on.   1. Defects of automatic...

  Perforation is the first process and one of the most important deformation processes of hot rolled seamless steel pipes. Its function is to pierce the solid tube blank and a hollow tube is formed. According to the deformation characteristics of the tube blank's piercing process, it is divided into the longitudinal...

1. The chemical composition of steel The chemical composition of steel is the most important factor affecting the performance of seamless steel pipes. It is also the main basis for formulating the process parameters of tube rolling and heat treatment of steel tubes. In the seamless steel pipe standard, corresponding requirements...

1.3.2 Influence of opening angle and extrusion force It is very important to ensure that the edges of the stainless steel strip are flat, smooth and have as few burrs as possible for subsequent welding. Zesheng Zhang and others found that whether the burning process of the edge is stable or not during welding...

At present, a lot of research is carried out on the high-frequency welding of stainless steel. Yudong Dong and others studied and analyzed the changes in the microstructure and properties of the welding seam by high-frequency welding of 12%Cr ferritic stainless steel. Zongyue Bi and others studied...

Abstract: To ensure the quality of stainless steel high-frequency welded pipes and realize their quality control, the main factors affecting the process quality of stainless steel high-frequency welding were analyzed, including the physical and chemical properties of stainless steel, welding and forming processes....

Around 1970, China imported some magnetic flux leakage detection devices from developed countries. After that, China gradually began to conduct research on magnetic flux leakage technologies. In 1999, given China's great demand for magnetic flux leakage detection technology for steel pipes,...