Electrofusion welded pipes can be subjected to water pressure, flaw detection, X-ray reports, and material protection
Classification of steel pipes for electric power: Steel pipes are divided into two categories: seamless steel pipes and welded steel pipes (welded pipes). According to the shape of the cross-section, it can be divided into circular pipes and special-shaped pipes, but there are also some special-shaped steel pipes such as square, rectangular, semicircular, hexagonal, equilateral triangular, and octagonal. For steel pipes that bear fluid pressure, a hydraulic test is required to verify their pressure resistance and quality. It is considered acceptable if there is no leakage, wetting, or expansion under the specified pressure. Some steel pipes also undergo crimping tests, flaring tests, and flattening tests according to standards or the requirements of the purchaser.
Power steel pipes refer to steel pipes with open ends and hollow sections, and their length is larger than that of the surrounding area. According to production methods, they can be divided into seamless steel pipes and welded steel pipes. The specifications of steel pipes are expressed in terms of external dimensions (such as outer diameter or side length) and wall thickness, and their dimensions range from small diameter capillary tubes to large diameter pipes up to several meters in diameter. Steel pipes can be used for pipelines, thermal equipment, mechanical industry, petroleum geological exploration, containers, chemical industry, and special purposes.
The materials of steel pipes for electric power include Cr5Mo, A335P5, A335P91, 10CrMo910, A335P22, A671CC60, A671CC65, A672B70CL12/22/32, A691Cr1-1/4CL22/32, WB36 (15NiCuMoNb5), A387Gr.91, A387Gr1/3/6, and other materials.