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Carbon steel flange

Carbon steel flange, that is, the flange or end flange connection whose body material is carbon steel. The flanges containing carbon steel are called carbon steel flanges. Common materials are cast carbon steel grades WCB, forgings A105, or Q235B, A3, 10#, #20 steel, 16 manganese, 45# steel, Q345B, etc.

Carbon steel flange is a common material of flange, because it contains carbon steel material, so it is called carbon steel flange. There are many grades of carbon steel flange materials, such as Q235B, A3, 10#, #20 steel, 16 manganese, 45# steel, Q345B, etc.

The pressure marking specified in this standard is divided into PN marking and Class marking.

Another layer of carbon steel flanges means: flanges produced according to the size and tolerance range required by the standard are different from the flanges not produced according to the standard size, which are also called second-standard flanges (some people call them non-standard flanges). is incorrect), usually some unscrupulous merchants will reduce the flange thickness and outer diameter to save materials, and use scrap steel or scrap steel to process flanges, usually this steel is chemical composition and mechanical Scrap whose performance does not meet the standard, some even use the black steel factory to produce flanges. The steelmaking technology used in this private steelmaking is outdated, and it may not be able to be welded with the steel pipe during use, or the steel itself has cracks, pores and other welding. It also leaks when it goes up. Therefore, try to use carbon steel flanges when purchasing flanges.

Carbon steel flanges are tight. It has two sealing surfaces, and various plastics are widely used for the sealing surface materials of the ball valve at present, which has good sealing performance and can achieve 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%.

Carbon steel flanges have different hardness and strength in use and production, and guarantees can play an important role and value in use. Carbon steel flanges of different materials can have different advantages and characteristics in use, and low carbon steel has good plasticity and low strength. Flange connections may suffer from high tensile, compressive, torsional, and shear strengths, and should be used according to certain production patterns and methods for sealing pipe plugs. Carbon steel flanges are produced with different materials and production configurations in production. The production materials of flange covers are as follows: carbon steel flanges are flanges without holes in the middle. To ensure that the tube can show good performance and advantages, it must be produced in strict accordance with certain processes and methods during production. Carbon steel flanges are a better choice. After adding the right amount of carbon, it will become firm. It can play different roles and costs in the utilization.

The gaskets required to be utilized are also different. Smooth face flanges are generally only used for low pressure, carbon steel flanges. Flange situation is different. Equipped with a soft thin gasket; under high pressure, if the strength of the flange is sufficient, a smooth surface flange can also be used, but a thick soft gasket should be used, or a wound gasket with an inner reinforcing ring or a reinforcing ring. In such places, metal gaskets are not practical, because the required pressing force at this time is too large, resulting in large deformation of the bolts, making the flange difficult to seal. If a metal gasket is used, the smooth surface should be reduced to reduce the contact area with the gasket. In this way, in an environment with the same bolt tension, the compressive stress of the narrow and smooth surface after the reduction will increase.