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Post weld heat treatment is to improve the organization and properties of welded joints or eliminate residual stress and heat treatment carried out. Commonly used methods are normalized or normalized and tempered with two stress elimination process.

Structural steel pipe racks typically support pipes, power cables and instrument cable trays in petrochemical, chemical and power plants.

Hot expansion steel pipe mandrel surface pulsating spray device is a device to a thermal expansion pipe mandrel surface spray lubricant,which is characterized by injection device body ring parts with lubricant reservoir burglary

An on board to guide rails can be welded on the foundation, or with screws, then push the inside rail nut orbit and turn 90 degrees and the lower half of the body embedded tube clamp nut, put the need fixed pipe, add the upper half of the pipe clip body and cover with screws.

Generally the billet is plastically deformed at a certain temperature environment, through a dedicated mold, the metal to produce a continuous smooth flow of the process to achieve the deformed geometry requirements.

Oil and gas pipeline corrosion in the soil is a very slow process, and how to obtain reliable corrosion rate data in a short time, is carried pipeline corrosion life prediction of an important basic research.

Weld shape refers weld seam geometry parameters indicated.

How it works: a variety of abrasive wear is wear the most serious form of wear and tear, and its essence is due to the hard metal surface abrasive cutting or chipping action results. Abrasive particles penetrate the metal surface plastic deformation and wear scar until the metal surface abrasion. Our company has developed.

Submerged arc welding is higher production efficiency today mechanized welding method, one of its high production efficiency, the weld quality is stable. However, due to inappropriate technology developed, often forming bad, undercut, lack of fusion, slag, porosity, cracks and other defects occur.

Thermal specification refers forging forging the selected thermodynamic parameters, including forging temperature, the degree of deformation, strain rate, stress state (forging method), the heating plus cooling rate. These parameters directly affect the microstructure and properties of metallic materials, and forgings malleable, reasonable choice of several thermodynamic parameters above, is to develop an important part of the forging process.

The hot welded cracks are also known as high-temperature crack or solidification cracking, usually produced in Weld, sometimes also occur in the heat-affected zone, the manifestations are: longitudinal cracks, transverse cracks, roots crack crater cracks and heat-affected zone cracking.

Under the harsh winter conditions of low-carbon steel welding, due to the cooling speed of welded joint fastly make the crack tends to increase, especially in the first weld Heavy structures susceptible to cracking, for which the process must take the following measures: