Difference analysis between butt welding flange and special-shaped flangeTime of issue : 2022- 05-23
Difference analysis between butt welding flange and special-shaped flange The sealing surface of butt welding flange can be made into three types: smooth type, concave-convex type and tongue-and-groove type. The application of smooth butt welding flange is large. Generally, it is mostly used when the medium conditions are relatively moderate, such as low-pressure unpurified compressed air and low-pressure circulating water. Its advantage is that the price is relatively cheap. Butt welding flanges are suitable for pipelines with large fluctuations in pressure or temperature or pipelines with high temperature, high pressure and low temperature, and are also used for pipelines that transport expensive, flammable and explosive media. The welding method used when connecting the flange and the pipeline of the butt welding flange is butt welding. The welding seam is similar to the welding of pipelines and pipelines. Generally, argon arc welding is used for the bottom of the small pipe diameter, and the cover surface is manually welded. Only use double-sided welding.
Matters needing attention when processing large diameter flangesTime of issue : 2022- 05-23
Matters needing attention when processing large diameter flanges When processing large-diameter flanges, we must first understand that such a component itself may have certain defects in the welding process. If the welding defects of stainless steel flanges are serious, they are basically Manual grinding is used for grinding. This grinding method is used to make up for it. Relatively speaking, a series of grinding marks may be produced, which may cause uneven surface more or less, which directly affects the entire equipment. Beautiful!
Structural classification of stainless steel flangesTime of issue : 2022- 05-23
Structural classification of stainless steel flanges 1. Smooth type: used for stainless steel valves with low pressure. It is more convenient to process; 2. Concave-convex type: high working pressure, medium-hard washers can be used...
Stainless steel flanges have excellent corrosion resistanceTime of issue : 2022- 05-23
Stainless steel flanges have excellent corrosion resistance: The thin and strong oxide film on the surface of the stainless steel flange makes the stainless steel have excellent corrosion resistance in all water quality, even if it is buried in the ground. Therefore, it is suitable for all kinds of water quality, except for disinfection and sterilization, it does not need to control the water quality. At the same time, there is no corrosion and excessive exudate, which can keep the water quality pure and hygienic, prevent secondary pollution, and can withstand the impact of high water flow up to 30 meters per second.
Structural shape classification of stainless steel flangesTime of issue : 2022- 05-23
The structural shapes of stainless steel flanges are classified as follows: 1. Smooth type: for stainless steel valves with low pressure, it is more convenient to process. 2. Concave-convex type: The working pressure is high, and medium-hard washers can be used...
What are the quality requirements for stainless steel flange connectionsTime of issue : 2022- 05-23
The quality requirements of stainless steel flange connection are as follows: The selection of stainless steel flanges must meet the design requirements. When there is no design requirement, the flange of appropriate form and specification should be comprehensively selected according to the factors such as the maximum working pressure, maximum working temperature, working medium, and material grade of the flange. The flange must be visually inspected before installation. The surface should be smooth, and there should be no defects such as blisters, cracks, spots, burrs that reduce the strength of the flange, and there should be no penetrating scratches on the sealing surface that affect the sealing.
How to quickly clean the remaining stains on stainless steel flangesTime of issue : 2019- 08-08
The most commonly used flange is 304 stainless steel. The flange made of this material will be corroded at a rate of less than 0.1mm per year in 10% nitric acid at 20 °C; in 10% boiling acetic acid, the corrosion rate is Less than 0.1mm per year; corrosion rate in 50% citric acid is less than 0.1mm per year; corrosion rate in 20% potassium hydroxide is less than 0.1mm per year. The corrosion rate of 80% phosphoric acid at 60°C is still less than 0.1mm per year; but the corrosion rate of 2% sulfuric acid at 50°C is 0.016mm per year.
Simple analysis of the difference between butt welding flange and flat weldingTime of issue : 2019- 08-08
Simple analysis of the difference between butt welding flange and flat welding. The butt welding flange is that the pipe diameter and wall thickness of the interface end are the same as the pipes to be welded, and are welded like two pipes.
Stainless steel flanges are used in the water supply system industryTime of issue : 2019- 08-08
The use of stainless steel flanges in the water supply system industry mainly has the advantages of safety, reliability, sanitation and environmental protection, and economical application. It has been proved by domestic and foreign engineering practice as one of the environmental protection pipes with the best comprehensive performance in the water supply system, and it is also a very competitive water supply pipe, which has important significance and effect on improving water quality and improving people's living standards.
Nondestructive testing and radiographic testing of butt weld flangesTime of issue : 2019- 08-08
Non-destructive testing of butt welding flanges is the most widely used method in pressure vessel inspection, and it can be applied to all aspects of vessel manufacturing. In the inspection of raw materials, steel plates for pressure vessels, high-pressure seamless steel pipes, and forgings of various steel grades above grade IV with a thickness exceeding a certain value shall be subjected to ultrasonic testing, and the groove surface after hot processing of high-strength grade steel shall be subjected to surface inspection. For inspection, the welds on the container shall be subjected to radiographic inspection or ultrasonic inspection. In addition, non-destructive testing is also required in welder operation skill assessment, welding procedure evaluation, product test plate, and in-use pressure vessel inspection...