However, my country's current management level, technical level and financial capacity cannot meet and adapt to those advanced deaeration and softening technical requirements. Therefore, the oxygen content in the heating water greatly exceeds the standard, leading to corrosion of the fin tube. Therefore, how to solve the corrosion problem of finned tube under the condition of oxygen-containing medium is of great significance in our country.
According to the current situation, the way to solve the oxygen corrosion of the fin tube can be considered from the following aspects:
(1) The design of the heating system should try to prevent the system from communicating with the oxygen, that is, it should be as tight as possible, such as the location of the exhaust cock, the closure of the circulating pump, etc. At the same time, the low pressure should be avoided during the operation of the equipment, which also avoids Unnecessary water loss.
(2) Adding water must undergo deoxygenation treatment.
(3) Add corrosion inhibitor to heating water.
(4) When the heating is stopped, the finned tube shall be maintained by dry method or filled with deoxygenated water.
(5) When the finned tube is newly installed for pressure test, the water pressure test medium should be added with a water solvent non-toxic rust inhibitor.
How are finned tubes classified by application?
There are many types of finned tubes, and new varieties are constantly emerging. In general, finned tubes can be classified according to the following aspects in the application:
Finned tubes are classified according to processing technology:
1. Tandem piece tube (sleeve piece tube);
2. Tension winding finned tube;
3. Panel tube;
4. Rolling finned tube as a whole;
5. Casting finned tube;
6. Welded finned tubes,
Among them are divided into: high frequency welding finned tube, submerged arc welding finned tube, etc.
Classified by fin shape:
1. Square, rectangular, round finned tube;
2. Spiral finned tube;
3. Corrugated finned tube;
4. Serrated finned tube;
5. Needle finned tube;
6. Longitudinal finned tube;
7. Overall plate-shaped finned tube (plate fin), etc.
Finned tubes are classified by material
1. Copper, Al, Cu/Al finned tube;
2. Carbon steel, stainless steel, carbon steel/stainless steel finned tube;
3. Cast iron (cast steel) finned tube; etc. To
Finned tubes are classified by purpose: finned tubes for air conditioning; finned tubes for air cooling; boilers: finned tubes for water wall, economizer, and air preheater; fins for waste heat recovery of various kilns and industrial furnaces Tubes, finned tubes for other special purposes; etc.
