Stainless steel elbow use operation matters

　　Stainless steel elbow ball valves, globe valves, gate valves when used, only for full open or full closed, not allowed to do to regulate the flow rate, so as to avoid erosion of the sealing surface, accelerate wear. Gate valve and upper threaded globe valve with inverted sealing device, handwheel spin position tightening, you can stop the medium from leaking from the packing.

　　Stainless steel elbow generally refers to in the caliber in the above, large diameter elbow including large diameter straight seam elbow, large diameter seamless elbow butt welding elbow. The market is used more butt-welding elbow, straight seam and seamless in large caliber in addition to raw materials, equipment and technology, and then the price is more expensive. Large-diameter elbow according to the angle can be divided into degrees of large-diameter elbow, there are degrees of large-diameter elbow and 180 degrees of large-diameter elbow and other different angles of the elbow.

　　Stainless steel elbow used for a period of time need to be checked on a regular basis, often exposed processing surface must be kept clean, dirt, neatly stored in a dry place indoors in the air, 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.

　　Stainless steel elbow is a stainless steel plate (usually 304,321 stainless steel plate) as raw materials, the steel plate according to the requirements of the material cut into material, molded by molding, but also through the stamping die stamping stamped into a round, with two of the same and then splicing, welding, adjusting, etc., the splicing process will certainly produce a weld, and therefore in the stainless steel plate welded to be heat-treated. Welded stainless steel elbow two important processes: flaw detection and heat treatment.

　　Stainless steel elbow in the performance of the outstanding performance yield strength and stress corrosion resistance, duplex stainless steel than austenitic stainless steel yield nearly 1 times, the same pressure level conditions, you can save material. Than the austenitic stainless steel linear coefficient of thermal expansion is low, and low carbon steel close. Make duplex stainless steel and carbon steel connection more suitable, which has great engineering significance. Forging and cold stamping molding is not as good as austenitic stainless steel. Weldability: duplex stainless steel 2205 has good weldability, welding cold crack and hot crack sensitivity are small. Usually no preheating before welding, no heat treatment after welding. Due to the high nitrogen content, the heat affected zone of the single-phase ferrite tendency is small, when the welding material selection is reasonable, welding line energy control at the time, the welded head has a good overall performance.