Rupture disk for non-welding gas cylinders

Abstract

The invention belongs to the technical field of pressure vessel safety equipment, and relates to a safe pressure relief device for fluid overpressure, in particular to a rupture disk for non-welding gas cylinders. The rupture disk adopts JYH21CT high-chromium stainless steel material. As the JYH21CT high-chromium stainless steel has excellent corrosion resistance, low cold-work hardening property, high yield strength, good ductility and no nickel serving as rare metal, manufacturing processes and cost can be reduced. Meanwhile, by utilizing the ultra-low carbon and low titanium content of the material, the weldability and high yield strength of the material are increased. The molding height of the rupture disk is between 4.0 to 4.7 mm, and a weakening groove of the rupture disk is at an angle of 40 to 45 degrees. By utilizing the characteristics of no expensive nickel serving as rare metal contained by the material, no cold deformation hardening of products and no need for high-temperature heat treatment, the invention greatly reduces the price of the products, and by utilizing precise molding technology and processing technology, the forward bursting pressure and the reverse bursting pressure of the products are basically consistent, so that the safety of the products is greatly improved.

Description

Technical field [0001] The invention belongs to the technical field of pressure vessel safety equipment, and relates to a safety relief device for fluid overpressure, in particular to a bursting disc for a non-welded gas cylinder. Background technique [0002] At present, rupture discs for non-welded gas cylinders are made of 304 or 316L stainless steel in China, and special low-carbon steel materials are used abroad. For the use of austenitic stainless steel materials, there is a high cost, because high nickel materials, and nickel is a scarce and non-renewable metal, the international market price fluctuates greatly, and the material prices are high. In addition, austenitic stainless steel has strong cold work strain hardening characteristics. After the product is stretched and deformed, it is generally subjected to high-temperature solution heat treatment, otherwise the hardness of the deformed area is too high, and it is very easy to crack during the groove; while the JYH21CT...

AI Technical Summary

Problems solved by technology

For austenitic stainless steel materials, after heat treatment, the structural strength will decrease. If the manufacturing process is not strictly controlled, instability will easily occur. Once the instability occurs, the bursting pressure of the rupture disc will increase significantly, which will greatly increase the safety of the equipment. bring harm

Foreign products are made of special low-carbon steel. Although the product has good performance and low cost, it is very easy to rust, and the product must be anti-rust. This process will pollute the environment. The anti-corrosion treatment liquid is harmful to the human body and environmentally friendly. The facilities are not up to standard and not easy to use

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