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Rupture Phenomenon of Cold Drawn Seamless Steel Pipe
When seamless steel tubes are cold drawn, hot rolled tube defects such as cracks or the presence of high-precision drawing fuel tank is made after the fracture occurred in the course, almost no plastic deformation occurred, generally are brittle fracture. Brittle fracture is caused by a variety o...Read more -
Weld Appearance Requirements of Pressure Pipe
Before the pressure pipeline nondestructive testing, visual inspection of welds shall comply with the requirements. Pressure pipe weld appearance and surface quality of welded joints general requirements are as follows: welding should look good shape, width of each side groove edge 2mm overshadow...Read more -
Quenching Method of Steel Pipe Deformation and Crack
Austempering is to reduce the deformation of steel pipe and an effective method of quenching crack Jian, but how to properly use the process method should be based on reasonable seamless steel pipe material, size, hardness and toughness, deformation requirements, and specific working conditions t...Read more -
Galvanized Method of Seamless Steel Pipe
To meet the various requirements of the premise of increasing the use of progress, extend the life of galvanized steel, zinc coating materials are evolving. Major new coatings are: (1) A zinc-iron alloy coating. That galvanized steel after heat treatment. Such as the diffusion annealing at 500 ~ ...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 -
Quality Inspection Mode of High Alloy Pipe
1. Leveling milling: After the steel sheet leveling machine anvil original curved, then through the edge milling machine for milling steel two-sided margin, so as to meet the needs of the plate width, plate edge parallelism and groove shape. 2. Cut molding: in-line along the outer edge of the pla...Read more -
Advantages and Disadvantages of Various Anti-corrosion Materials
Petroleum asphalt, raw materials wide, low prices. However, poor working conditions, difficult to guarantee quality, serious environmental pollution. Coal tar epoxy, easy to operate, but a long time covering layer is cured by environmental impact, suitable for field work, the following 10 ℃ diffi...Read more -
Performance Advantages of Thermal Expansion Pipe
Thermal expansion pipe is a steel pipe processing special way is a hot expanding the use of hydraulic or mechanical means urging the steel pipe from the steel wall along the radially outward dilatation molding pressure processing technology. Mechanical means than hydraulic methods, devices, simpl...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 -
High-frequency Welded Pipe on the Quality of the Welding Operation in Process
Welding pressure Frequency welded pipe welding pressure is one of the main parameters of the welding process, after the two edges of the tube is heated to welding temperature and squeezing produce welded under pressure to form a common metal grain that is mutually crystals. Since the tube width a...Read more -
Structural Steel Heat Treatment Technology
Structural steel workpiece in the heating and cooling process, due to inconsistencies cooling rate of the surface layer and the core section and time form a temperature difference, it will lead to volume expansion and contraction of the uneven stress that the heat stress. In the thermal stress du...Read more -
The Main Method of Straight Welded Steel Pipe
Forged: forging hammer use reciprocating impact force or press pressure so we need to change the blank shape and size of a pressure processing method. Extrusion: steel metal is placed in closed extrusion Jane, put pressure on one end of the metal from the die orifice to obtain a predetermined ext...Read more
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