The chemical composition of stainless steel elbow will keep the surface of stainless steel elbow from being corroded and rusting for a long time. The 90 ° stainless steel elbow supplier reminds you that the following two aspects are required when cleaning: 1. According to the requirements of the workpiece and the surface condition, alkaline cleaning, water-soluble cleaning agent, chlorine solvent blasting Shot peening and other methods; Second, the treatment of stainless steel elbows, generally do not use the method of pickling.
Correctly cleaning the stainless steel thread elbow 90 °can improve the safety performance of its use and prolong its service life. The electrode should be kept dry. The titanium-calcium type should be dried at 15 ℃ for 1 hour, and the low-hydrogen type should be dried at 200-250 ℃ for 1 hour. Oil and other dirt, so as not to increase the carbon content of the weld and affect the quality of the weldment. When the elbow is welded, the carbide is precipitated by repeated heating, which reduces the corrosion resistance and chemical properties. After welding, the hardening is large, and cracks are easy to occur. If the same type of electrode is used for welding, it must be preheated above 300 ℃ and warmed and cooled at about 700 ℃ after welding. If the weldment cannot be heat-treated after welding, the chromium-nickel stainless steel electrode should be used. Instructions for installation of stainless steel elbow:
Stainless Steel Thread Street Elbow
1. Before installation, each standard of stainless steel thread street elbow must be checked in detail, whether it meets the requirements of use, eliminates the defects caused by the transportation process, and eliminates the dirt of the stainless steel elbow. Everything is ready.
2. When installing, the stainless steel elbow can be directly installed on the pipeline according to the connection mode, and installed according to the position of use. Under normal circumstances, it can be installed in any position of the pipeline, but it needs easy maintenance. Note that the flow direction of the stainless steel elbow should be upward from the bottom of the longitudinal flap, and the stainless steel elbow can be installed horizontally. The installation of stainless steel elbows should pay attention to the tightness to prevent leakage and affect the normal operation of the pipeline.
3. The bolts of the stainless steel elbow valve packing gland should be tightened evenly, and should not be pressed into a crooked state, so as not to encounter the stem of the obstructed valve or cause leakage.
4. When using stainless steel elbow ball valves, globe valves, gate valves, they are only fully open or fully closed, and are not allowed to adjust the flow rate, so as to avoid erosion of the sealing surface and accelerated wear. The gate valve and the upper threaded globe valve have an inverted seal device. The hand wheel is turned to the uppermost position and tightened, which can prevent the medium from leaking from the packing.