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08-08
/ 2024
China's steel industry has been at the forefront of national rejuvenation. Through the arduous efforts of a whole generation, it has already reached the top in the world and supported the rapid development of China's economy and society. In the face of unprecedented changes in a century, the steel industry faces development difficulties such as domestic overcapacity, low small and scattered disorderly competition, market-oriented and legal-oriented joint restructuring, improving industrial concentration, promoting green, low-carbon and high-quality transformation and development, and firmly believe, and strive to go out.
10-19
/ 2023
There are various connection methods of stainless steel pipes. The common types of pipe fittings are compression type, compaction type, live connection type, advance type, push thread type, socket and insert welding type, live connection type flange connection, welding type and the derivative series connection method combining welding and traditional connection. These connection methods, according to its principle is different, its scope of application is also different, but most of them are easy to install, firm and reliable. The sealing ring or gasket material used in the connection is mostly selected in line with the requirements of national standards, such as silicone rubber, nitrile rubber and EPM rubber, so as to avoid the user's worries.
10-18
/ 2023
Thin-walled stainless steel pipe, the domestic in the late 1990s began to produce, use, is today's pipe field budding family, has been widely used in building water supply and direct drinking water pipelines.
Thin-walled stainless steel pipe is durable and has been recognized by the engineering community, and the relevant parties are starting from reducing the wall thickness and reducing the price, in order to facilitate further promotion.
10-17
/ 2023
a. Round steel preparation;
b. Heating;
c. Hot rolling perforation;
d. Cut the head;
e. Acid washing;
f. Trim and grind;
g. Lubrication;
h. Cold rolling processing;
i. Degreasing;
j. Solution heat treatment;
k. Straighten; straighten;
l. Cut a tube;
m. Acid washing;
n. Inspection of finished products.
10-16
/ 2023
① The demand for building water supply pipes is large
According to the "Ninth Five-Year Plan" of the Construction industry and the Outline of the Vision Goals in 2010, it is estimated that the annual demand for pipe materials is 500,000-600000 km from 2001 to 2010, among which the demand for hot and cold water pipes in the residential construction area is 400000 km. Some people think that the development of stainless steel water pipes is of great significance to improve the grade of modern urban buildings.
09-14
/ 2023
Statistics from the Stainless Steel Branch of China Special Steel Enterprise Association show that in 2020, China's crude stainless steel production was 30.139 million tons, an increase of 739,400 tons, an increase of 2.51%, of which Cr-Ni steel (300 series) was 14.37,600 tons, an increase of 887,400 tons, an increase of 6.58%, accounting for 47.71%; Cr steel (400 series) 5,925,500 tons, an increase of 422,400 tons, an increase of 7.68%, accounting for 19.66%; Cr-Mn steel (200 series) 9,643,200 tons, down 589,900 tons, down 5.68%, accounting for 32.00%. In addition, in 2020, China's duplex stainless steel production reached a new high of 191,400 tons, an increase of 10,500 tons, an increase of 5.8%, accounting for 0.63%.
09-13
/ 2023
In the manufacturing process of the steel tube, the grease grains used for lubrication will also be deformed due to processing.
09-13
/ 2023
The corrosion resistance of stainless steel mainly comes from the formation of a dense protective layer on its surface after the chromium element in it reacts with oxygen. The role of pickling is to make it happen in advance of this reaction, in order to improve the corrosion resistance of stainless steel pipe, pickling process will remove the oil attached to the surface of the pipe and other substances contaminated in the production. The inner and outer surface of the pipeline is rough and easy to be attached by suspended impurities.