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What are the non-destructive testing of seamless pipes?
What is non-destructive testing? Non-destructive testing, referred to as NDT, is a modern inspection technology that detects the shape, position, size and development trend of internal or external defects without damaging the object to be inspected. It has been widely used in steel pipe productio...Read more -
Quality requirements for carbon steel pipes
Quality requirements for carbon steel pipes: 1. Chemical composition Requirements are put forward for the content of harmful chemical elements As, Sn, Sb, Bi, Pb and gas N, H, O, etc. In order to improve the uniformity of the chemical composition in the steel and the purity of the steel, reduce t...Read more -
What is the material of the spiral pipe?
Spiral pipe is a spiral seam steel pipe made of strip steel coil as raw material, extruded at regular temperature, and welded by automatic double-wire double-sided submerged arc welding process. The spiral steel pipe feeds the steel strip into the welded pipe unit. After being rolled by multiple ...Read more -
How to Solve Bubble Problem of Precision Light Pipe
Heat strengthened, high impact toughness, may not be sensitive to lack. Excellent thermoplastic, high speed extrusion into a complex structure, thin-walled, hollow profiles of various, or forgings forged into complex structures. Quenching temperature range, low quench sensitivity, after extrusion...Read more -
Coiled Tubing Manufacturing Technology
Coiled tubing is a single length of several kilometers and repeated bending, achieve multiple plastic deformation of the new oil pipe. Coiled tubing equipment and its operation is called “universal working machine” in the foreign countries such as the United States, Canada and other c...Read more -
Large-caliber Straight Seam Steel Pipe Production Process
1. Before molding work Raw materials that strip, wire, flux. We must go through rigorous physical and chemical testing before it is put. Strip head and tail docking, single or double wire submerged arc welding, in rolled steel by automatic submerged arc welding. 2. The molding process Electric co...Read more -
Continuous Rolling Production Process
Continuous rolling tube (hereinafter referred to as MPM) process is a mandrel refers to wear long capillary column continuously through a series arrangement rack, rolling and rolling method conforms to become rolling mother pipe size requirements. Its distinguishing feature is the large capacity,...Read more -
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