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Stainless steel elbow maintenance needs to pay attention to the knowledge

Stainless steel carbon steel elbow heating temperature is determined by the principle of material austenitising temperature above, and push the main compressive stress in the inner wall of the elbow is less than the yield value of the material at this temperature. The higher the austenitising temperature of the material, the higher the heating temperature; the higher the yield value of the material at high temperatures, the higher the heating temperature. Medium-frequency induction heating, WB36 higher temperature of 850 ~ 900 ℃, A335P22 steel for 900 ~ 950 ℃, A335P91 material heating temperature higher point of 900 ~ 1000 ℃. Temperature measurement is a combination of fixed far-infrared thermometer and manual far-infrared thermometer.

Carbon steel elbow heating temperature is determined by the principle of material austenitising temperature above, and push the main compressive stress on the inner wall of the elbow is less than the yield value of the material at this temperature. Material austenitising temperature is higher, the higher the heating temperature; material yield value is higher, the higher the heating temperature.

Temperature distribution is an important process parameter, which is directly controlled by the shape of the induction loop and the relative position of the induction loop and mandrel head. The shape of the induction loop is the main factor, the relative position of the induction loop and the mandrel head is a secondary factor. Temperature distribution law along the radial direction of the mandrel head is low, medium and high. The heating temperature is high, and the wall thickness of the pressed elbow increases. The impact of propulsion speed on the geometry of the pushed elbow propulsion speed as an important process parameter, directly controlled by the hydraulic system flow regulation. Push the principle of determining the speed of the main compressive stress in the inner wall of the elbow is less than the yield value of the material at this temperature, the elongation of the outer wall is less than the greater elongation of the material at this temperature. Material heat transmission coefficient, magnetic permeability and medium frequency power is large, push. Push, productivity increases, but the wall thickness of the pushed elbow thinning rate increases.

Stainless steel carbon steel elbow maintenance needs to pay attention to the knowledge:

In the use and maintenance of stainless steel elbow need to pay attention to a lot of things, need to be used by the user in accordance with the method, in accordance with accurate and fair methods of use and maintenance. Precautions are as follows:

1, long-term storage of stainless steel elbow, should be made on a regular basis check, often exposed processing surface must be kept clean, remove dirt, neatly stored in indoor airy and dry place, is strictly prohibited stacking or open storage. Often keep the stainless steel elbow dry and ventilated, keep the clean and tidy, in accordance with the accurate storage method.

2, installation, stainless steel elbow can be directly installed in the pipe according to the connection, in accordance with the location of the use of the installation. In general, can be installed in any position in the pipeline, but need to facilitate the manipulation of the inspection, pay attention to the cut-off stainless steel elbow medium flow should be longitudinal valve flap below to, stainless steel elbow can only be installed horizontally. Stainless steel elbow in the installation should pay attention to the sealing, to prevent leakage phenomenon, affecting the normal operation of the pipeline.

3, stainless steel elbow ball valves, globe valves, gate valves when used, only for full open or full closed, do not promise to do to regulate the flow, so as to avoid erosion of the sealing surface, accelerate wear. Gate valve and upper threaded globe valve with inverted sealing device, the handwheel screwed to the upper position to tighten, you can prevent the medium from leaking from the packing.

4, stainless steel elbow application handwheel, do not use levers or other tools, so as not to damage the valve parts. Clockwise rotation of the handwheel is closed, and vice versa is open. Sub ah use to be fair, accurate use of methods and means.

5, stainless steel elbow valve packing gland bolts should be tightened evenly, should not be pressed into a crooked state, so as not to bruise obstruct the stem movement or cause leakage.

6, stainless steel elbow in the process of use, should often keep clean, drive threads lubricated on a regular basis, found faults, should immediately suspend the use of, find out the cause to remove the fault.

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