Stainless steel pipe fittings are used in pipeline systems in industries such as petroleum, natural gas, chemicals, hydropower, construction and boilers. No pipe blanks are needed as raw materials, which can save the cost of pipe making equipment and molds, and can make large diameter and relatively thin wall carbon steel elbows. It can shorten the manufacturing cycle and reduce the production cost. Because no equipment is needed, it is more suitable for on-site processing of large carbon steel elbows. The blank is a flat plate or a developable curved surface, so the material is simple to cut, the accuracy is easy to determine, and the assembly and welding are simple.

Below, the influence of the annealing temperature of stainless steel stamping elbows is explained:

1. Water vapor in the furnace On the one hand, check whether the furnace body material is dry. The furnace body material needs to be dried for the first time. Second, whether there is too much water stains on the stainless steel pipe entering the furnace, especially if there are holes on the pipe, do not let water leak in, otherwise the furnace atmosphere will be completely destroyed. Generally, if it is normal, the stainless steel pipe about 20 meters after the furnace is opened will begin to shine, the kind that is bright and reflective. The most important thing to pay attention to is the knowledge we mentioned above. I hope everyone can pay attention to it during production.

2. Annealing atmosphere generally uses hydrogen as annealing atmosphere, and the atmosphere density is preferably above .%. If the other part of the atmosphere is inert gas, the density can be lower, but it should not contain too much oxygen and water vapor.

3. Protective gas pressure In order to prevent micro-leakage, the protective gas in the furnace should maintain a corresponding positive pressure. If it is hydrogen protective gas, it is generally required to be above 20kBar.

4. Furnace sealing Bright annealing furnace should be closed and isolated from the outside air; if hydrogen is used as protective gas, only one exhaust port is open (used to ignite the discharged hydrogen). The method of inspection can be to apply soapy water to the gaps of each joint of the annealing furnace to see if there is gas leakage; the places where gas leakage is more likely to occur are the places where the annealing furnace enters and exits the pipe. The sealing rings in this place are particularly easy to wear and tear, so they should be checked and replaced frequently.

5. Whether the annealing temperature reaches the specified temperature. The heat treatment of stainless steel pipe fittings is generally solution heat treatment, which is what people usually call "annealing", with a temperature range of 1040~1120 degrees. You can also observe through the annealing furnace observation hole. The stainless steel pipe fittings in the annealing area should be in an incandescent state, but there is no softening and sagging.

Elbows and Stainless Steel Weld Elbow produce excellent performance and performance in the specific use process, fully demonstrating excellent operation performance and producing excellent application performance. After painting and spraying white characters, the elbows also look very energetic, beautiful, and add a good look. Why is this? There are two reasons. Originally, the elbow maintains its original color, and the original surface can be seen, and it will not be tampered with by fraud. The construction period of the elbow can be advanced, and it can be loaded and left after production. There are many ways to distinguish elbows, and three are briefly introduced. According to the material points, there are cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics. According to the pipe connection method, it can be divided into direct welding, flange connection, hot melt connection, electric fusion connection, threaded connection and socket connection. According to the manufacturing process, it can be divided into: welding elbow, stamping elbow, push elbow, forging elbow, butt welding elbow, etc.