News
-
Longitudinal Molding Principles and Methods
Pipe forming the strip is unequal curvature composite longitudinal deformation process and continuous operation in cross section, and the strip is bent by the force of a multi-directional deformation process. The basic principle of straight seam steel pipe forming theory is by the action of an ex...Read more -
Ceramic-lined Composite Steel Pipe Installation
Ceramic-lined composite steel pipe transportation and installation is very convenient, ceramic lined composite steel pipe and steel pipe, wear-resistant alloy cast pipe, cast iron pipe and cast stone pipe comparison, relatively light weight, easy to transport. Ceramic-lined composite steel pipe c...Read more -
Difference between Submerged Arc Welding and High Frequency Welding
Submerged arc welding is an arc welding under flux layer combustion method. Welding arc between the wire and the weldment burning heat of the arc and arc welding wire ends near the base metal and solder melts, continue feeding the wire, and proceeds along a certain trajectory, an arc weld pool so...Read more -
Overall Hardening of Steel
With the rapid development of China’s oil industry, the demand for high-grade steel is growing, and high-grade steel must be quenched, and therefore the study of the overall quenching of steel is very important. China Heavy Machinery Research Institute has developed a “dip quenching +...Read more -
Steel management performance inspection
① Tensile test: measure stress and deformation, determine the strength (YS, TS) and plasticity index (A, Z) of the material Longitudinal and transverse specimen pipe section, arc, circular specimen (￠10,￠12.5) Small-diameter thin-walled steel pipes, large-diameter thick-walled steel pipes, and ...Read more -
It is expected that the price of Huazhong steel pipe will fluctuate within a narrow range tomorrow
On July 27, in terms of welded pipes and galvanized pipes, the black futures fluctuated upwards, the price of raw strip steel continued to rise, and the ex-factory prices of pipe factories also frequently increased, and some markets in Central China rose slightly. At present, the performance of t...Read more