Scroll loading
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.
View more >
Structural shape classification of stainless steel flanges
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.
3. Tongue and groove type: gaskets with larger plastic deformation can be used, which are widely used in corrosive media and have better sealing effect.
4. Trapezoidal groove type: use an oval metal ring as a washer, used for valves with a working pressure of ≥64 kg/cm2, or high temperature valves.
5. Lens type: The gasket is in the shape of a lens and is made of metal. It is used for high-pressure valves or high-temperature valves with a working pressure of ≥100 kg/cm².
6. O-ring type: This is a relatively new form of flange connection, which is developed with the emergence of various rubber O-rings.
What are the quality requirements for stainless steel flange connections
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 flanges
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 welding
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 industry
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 flanges
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...
Mobile Website
Welcome to negotiate consultation
Address: Zhenmen, Meili Town, Changshu City, Jiangsu Province, China
Telephone:86-512-52608838
Fax: 0086-512-52608198
E-mail:sales@dsflanges.cc
Zip Code: 215514