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Polishing method of dual phase steel flange

1. There are four polishing methods for dual-phase steel flanges: manual, mechanical, chemical and electrochemical. The corrosion resistance and decoration of the flange can be improved by polishing. The existing stainless steel electro-polishing liquid still uses phosphoric acid and chromic anhydride. During the polishing and cleaning process, some chromium and phosphorus will be discharged into the wastewater. Pollution to the environment.

2023-06-13

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How to anneal butt welding flange

Welding flange shielding gas pressure, in order to avoid welding flange slight leakage, the furnace shielding gas to a certain positive pressure, assuming hydrogen shielding gas, the general requirements of more than 20kBar. Annealing air, welding flange generally use pure hydrogen as annealing air, air purity of more than 99.99%. If the other part of the air is an inert gas, the purity can be lower, but it cannot contain too much oxygen and water vapor.

2023-06-13

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German standard flange: flange connection is divided into several kinds?

German standard flange: flange connection is divided into several kinds? At present, many people do not know the flange of German Standard. Now many people do not know what the flange is. Flanges are actually very common in pipelines. So German Standard Flange: How many kinds of flange connection methods are there?

2023-06-13

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German standard flange: what is the production process of flange?

German standard flange: what is the production process of flange? Flange as a connection sealing parts, in the production process, if there is a quality problem will leak, resulting in economic losses, environmental damage and even safety accidents, so flange welding and production is very important, then the German standard flange: what is the production process of flange? German standard flange: what is the production process of flange?

2023-06-13

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German standard flange: flange is what?

German standard flange: flange is what? For those engaged in mechanical or engineering installation, flanges should be very familiar. It is a disc-shaped part, usually used in pairs, so German standard flange: What is a flange?

2023-06-13

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