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Carbon steel flange technical conditions and characteristics!

2022-05-24

Another layer of carbon steel flanges means: flanges produced according to the size and tolerance range required by national standards are different from flanges not produced according to standard sizes, also called second-standard flanges (some people call them non-standard methods). The flange is incorrect), usually some unscrupulous merchants will reduce the thickness and outer diameter of the flange to save materials, and use scrap steel or scrap steel to process the flange.

Usually this kind of steel is waste material whose chemical composition and mechanical properties do not meet the standards. What’s more, the flanges are produced by private steelmaking in black steel plants. The steelmaking technology used in this private steelmaking is outdated and cannot guarantee the mechanical properties and welding properties. From time to time, it may not be possible to weld with the steel pipe, or the steel itself will leak water after welding with cracks and pores. Therefore, try to use carbon steel flanges when purchasing flanges.

The carbon steel flange is tight and reliable. It has two sealing surfaces, and the sealing surface materials of the ball valve are widely used in various plastics, which have good sealing performance and can achieve complete sealing. Since carbon steel flanges have wiping properties during opening and closing, they can be used in media with suspended solid particles. Model Q41F--16C Q41F--25C American standard A105 is about 0.9% (standard is 1.05Max can be reduced to 1.65% Max with carbon content) As for national standard 16Mn content is about 1.3% (standard 1.2% ~ 1.6%) Japanese standard S25C If so, it is lower than 0.6%.

The production process of carbon steel flange includes forging, casting, medium plate rolling, medium plate cutting and so on. Among them, forging prices are high, medium plate products are second, and casting products are low. In terms of quality, forging is the best, rolling is the second, and casting is the third. However, the diameter of forgings is generally small.

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The connection method of the national standard flange!

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2022-05-24