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What are metal serrated gaskets?

What are metal serrated gaskets? Metal serrated gaskets belong to a kind of metal composite gaskets. Generally, the zigzag grooves with 90 degree angle of concentricity are machined on the two sides of metal flat gaskets by precision lathe or special milling machine. Because the contact with other sealing surfaces is a linear contact of many concentric circles, they have labyrinth sealing effect. Flexible graphite can be selected according to different media and working conditions. PTFE, asbestos-free board or some other soft metals are pasted on the two sides of the gasket, making use of the sealing property of the […]

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What is a sealing gasket?

What is a sealing gasket? Sealing gasket is a kind of sealing spare parts used in machinery, equipment and pipeline as long as there is fluid. It uses internal and external materials to seal. Sealing gasket is made of metal or non-metal plate material by cutting, stamping or cutting. It is used for sealing connection between pipelines and between machine parts. According to the material, it can be divided into metal sealing gasket and non-metal sealing gasket. Metals include copper gaskets, stainless steel gaskets, iron gaskets, aluminum gaskets, etc. Non-metallic asbestos gaskets, non-asbestos gaskets, paper gaskets, rubber gaskets, etc. Material […]

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What is a compensator?

What is a compensator? Compensator is also known as expansion joint, or bellows expansion joint. The utility model is composed of a bellows (an elastic element) constituting the main body of the bellows and accessories such as an end pipe, a bracket, a flange, a conduit, etc. The utility model belongs to a compensation element. The effective expansion deformation of bellows is used to absorb the size changes of pipelines, conduits and containers caused by thermal expansion and cold contraction, or to compensate the axial, transverse and angular displacements of pipelines, conduits and containers. It can also be used for […]

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Cause Analysis and Countermeasure of Flange Seal Leakage

Leakage is a common phenomenon in chemical production, and it is also a problem that must be solved in safety production of chemical industry. Once all kinds of chemical pipelines and equipment leak, they will be wasted, and the whole plant will be shut down. Some leaks will do harm to people and the surrounding environment. Therefore, people do everything possible to prevent leakage in production practice. In chemical pipeline transportation process, flange connection and sealing are necessary, and the quantity is large and wide. Reasonable selection of flange sealing form and gasket material can effectively prevent leakage, and make […]

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Brief Introduction of Solution Treatment Heat Treatment Process for 304 Stainl……

Austenitic stainless steel is a kind of stainless steel with austenitic structure at room temperature. Steady austenite structure occurs in steels containing about 18% Cr, 8%-10% Ni and 0.1% C. Austenitic stainless steel is nonmagnetic and has high toughness and plasticity, but its strength is low. It is impossible to strengthen austenitic stainless steel by phase transformation. It can only be strengthened by cold working. If S, Ca, Se and other elements are added, it has good machinability. In addition to oxidation resistance and acid medium corrosion, such steels can also resist sulfuric acid, phosphoric acid, formic acid and acetic […]

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Heat treatment process and properties of S30432 austenitic stainless steel bend

A new austenite S30432 stainless steel pipe bend was prepared, and the effect of heat treatment technology on properties of S30432 pipe bend was investigated. The results show that the 1150℃ solution strengthening lead to the grain size nouniform and large austenite grain occurring. Solution process at 1110℃ or 1060℃, the uniform and fine austenite grain was obtained, with a austenite grain size 8~9 grade even if at the largest deformation zone, which still keep the same grain size in comparison with the original direct tube. While, the tensile strength at the zone is higher than that of direct raw […]

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Automobile fastener variety optimization and material and heat treatment

According to statistics, there are currently about 240 commonly used standards for automotive standard parts, including tube sealing components, pipe line connecting fixtures, washers, screws, nuts and bolts, etc., of which 115 standards and metal fastening Related, accounting for about 48%. With the continuous development of the automotive industry, the automakers have increased the cost of production and management to curb the increasing number of metal fasteners (hereinafter referred to as automotive fasteners), from structural elements, materials, heat treatment and surface treatment. In terms of the benchmarking of fasteners, this paper discusses this. Auto Fastener Variety Optimization Materials and Heat […]

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What’s the difference between 304, 304H and 304L?

Actually, according to the content of chromium and nickel, 304 stainless steel is made up of 18% chromium (Cr) and 8% nickel (Ni), but the main difference is the carbon content. Chemicals (%) of 304, 304L and 304H Grade C Mn Si P S Cr Mo Ni N 304 min. max. – 0.08 – 2.0 – 0.75 – 0.045 – 0.030 18.0 20.0 – 8.0 10.5 – 0.10 304L min. max. – 0.030 – 2.0 – 0.75 – 0.045 – 0.030 18.0 20.0 – 8.0 12.0 – 0.10 304H min. max. 0.04 0.10 – 2.0 – 0.75 -0.045 – 0.030 […]

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China International Stainless Steel Industry EXPO 2019, Shanghai

China International Stainless Steel Industry Exhibition 2019, Shanghai Date: 10/30/2019 – 11/1/2019 City: Shanghai, China Venue: Shanghai New International Expo Centre(SNIEC), Shanghai, China Organizers: Shanghai Shenshi Exhibition Service Co., Ltd China International Stainless Steel Industry Exhibition will cover steel metallurgy, stainless steel pipes, stainless steel flanges, stainless steel pipe fittings, metal materials, stainless steel enterprises, etc. With the continuous improvement of residents’ living standards, the potential of ultra-large-scale domestic demand is continuously released, and the development of infrastructure construction and high-end equipment manufacturing brings new opportunities for the stainless steel industry to expand the market. Concurrent Expo: Shanghai Metallurgy Expo 2019 – 21st Shanghai Metallurgy […]

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What is a safety valve?

What is a safety valve? Safety valve is a special branch of valve family. Its particularity is that safety valve only plays the role of switch unlike other valves. More importantly, it plays a role in protecting the safety of equipment. Safety valve is in normal closed state under the action of external force. When the medium pressure in the equipment or pipeline rises above the prescribed value, it is a special valve that prevents the medium pressure in the pipeline or equipment from exceeding the prescribed value by discharging the medium outside the system. Safety valves belong to automatic […]

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