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Routine maintenance and production process of thick-walled straight seam steel pipe
The advantage of thick-walled straight seam steel pipe is that the online heat treatment process of the weld eliminates the welding stress, refines the metallographic grains of the heat-affected zone, and improves the physical and mechanical properties. The direction of struct...Read more -
Three connection methods of large-diameter spiral steel pipes
The most commonly used connection method for large-diameter spiral steel pipes is welding, but in some projects, threaded connections, flange connections, socket connections, groove connections, etc. are often used. Welding and flange connection: Welding and flange connection ...Read more -
What problems should be paid attention to when welding galvanized steel pipe
1. The premise must be polished: the galvanized layer at the weld must be polished off, otherwise, bubbles, trachoma, false welding, etc. will occur. It will also make the weld brittle and reduce the rigidity. 2. Welding characteristics of galvanized steel: Galvanized steel is...Read more -
What is the main difference between hot-rolled steel pipe and cold-rolled steel pipe
1. The cold-rolled steel pipe allows local buckling of the section so that the bearing capacity of the bar after buckling can be fully utilized; while the hot-rolled steel pipe does not allow local buckling of the section. 2. The reasons for the residual stress of hot-rolled s...Read more -
Large-diameter steel pipe inner wall anticorrosion
Large-diameter steel pipe inner wall anticorrosion 1. Before processing all steel pipes, the steel plate on the inner wall side of the large-diameter steel pipe shall be de-rusted until the metal is exposed to metallic luster (whitening). It should meet the sa2.5 standard requ...Read more -
The difference between the standard specification of spiral steel pipe and precision steel pipe
Spiral steel pipes are mainly used in water supply engineering, the petrochemical industry, the chemical industry, the electric power industry, agricultural irrigation, and urban construction. Spiral steel pipes are 20 key products developed in my country. Spiral steel pipe is...Read more -
Detection methods and anti-corrosion countermeasures of oil casing
Oil casing detection method: 1. Ultrasonic testing: When ultrasonic waves are transmitted in the tested material, the acoustic properties of the material and changes in the internal structure will have a certain impact on the propagation of the ultrasonic wave. By detecting th...Read more -
Straight seam steel pipe continuous rolling process and application classification
The continuous rolling process of straight seam steel pipe: the continuous rolling process of straight seam steel pipe, the continuous rolling process is used in the continuous rolling and fixed diameter reduction process of steel pipe. Continuous steel pipe rolling is a proce...Read more -
Types of oil casing
Different types of oil casing used in oil extraction: Surface oil casing protects the drilling well from shallow water and shallow gas layers, supports wellhead equipment, and maintains the weight of other layers of casing. The technical oil casing separates the pressure of di...Read more