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Stainless steel and heat-resistant steel heat treatment operations
Cleaning: 1. The workpieces and fixtures should be cleaned of oil, residual salt, paint, and other foreign matter before heat treatment. 2. The fixture used for the first time in the vacuum furnace should be degassed and purified in advance at a vacuum level not lower than tha...Read more -
Duplex stainless steel pipe cold working process
1. The yield strength of duplex stainless steel is twice as high as that of austenitic stainless steel. The deformation amount should be smaller than that of the latter. Appropriate speed and feed rate must be selected during cold rolling to minimize uneven longitudinal wall t...Read more -
How to check the quality of large-diameter thin-walled steel pipes
1. Generally, large-diameter thin-walled steel pipes are used for the transportation of generally lower-pressure fluids such as water, gas, air, oil, and heating steam. 2. Ordinary carbon steel wire casing (GB3640-88) is a steel pipe used to protect wires in electrical install...Read more -
Large diameter straight seam steel pipe rust removal method and production process
Large-diameter straight seam welded pipe is a general name, produced with steel strips, and pipes straight seam welded by high-frequency welding equipment are called straight seam welded pipes. (It is named because the welding joint of the steel pipe forms a straight line). Am...Read more -
Thick-walled steel pipes require routine maintenance and economical introduction
Thick-walled steel pipes require routine maintenance during use: Thick-walled steel pipes are a widely used type of steel. It directly affects economic benefits and people’s lives. Countries around the world have attached great importance to the detection of thick-walled...Read more -
Common defects and correction methods of stainless steel sheet re-rolling
1 Characteristic of rolling deformation of stainless steel sheets The material of the magneto shield is 1Crl8Ni9, the material thickness is 0.2~0.3mm, and it is a modified stainless steel sheet. 1Crl8Ni9 belongs to austenitic stainless steel, which has the characteristics of t...Read more -
Packaging and storage of oil casing
According to the American Petroleum Institute standard APISPEC5CT 1988 1st edition, casing steel grades are H-40, J-55, K-55, N-80, C-75, L-80, C-90, C-95, P- There are 10 types of 110 and Q-125. The casing should be supplied with threads and couplings, or in any of the follow...Read more -
Application scope and adaptability conditions of plastic-coated steel pipes
Application scope of plastic-coated steel pipe: (1) Coal mine system: underground mine water supply and drainage, fire sprinkler, underground shotcrete, positive and negative pressure ventilation gas drainage, and other pipe networks. (2) Heating network water delivery system:...Read more -
What is the stress condition of spiral steel pipe during the extrusion process
(1) During the extrusion process, the temperature of the lining of the spiral steel pipe continues to increase as the extrusion process proceeds. At the end of the extrusion, the temperature in the area of the inner wall of the lining close to the extrusion die is relatively h...Read more