Large elbow loadingA batch of large elbows for domestic distribution have been completed, and loading has been completed today. Because of their large caliber, these elbows are not products that can be produced by ordinary small factories. Our company is good at the production of large elbows, tees, pipe caps, big and small pipe fittings. Rich production experience and raw material control experience to ensure the perfect delivery of products.
Large elbows are used for bending parts of pipes to change the direction of pipes. Commonly used are45 degree elbows and 90 degree elbows. The bending radius is about 1.0 times of the outside diameter of the pipe, which is called short radius elbow, and the long radius elbow is about 1.5 times of the outside diameter of the pipe. In the pipeline system layout, it is generally appropriate to use long radius elbow connection, short radius elbow is usually used in the pipeline installation location is more compact occasions or in order to reduce costs. When using short radius elbow, the working pressure of * should not exceed 0.8 times of long radius elbow of the same specification. Elbows are usually used in large-sized pipes with low pressure (design pressure s2.0MPa), water and similar fluid medium conditions. When the angle of one section of oblique elbow is more than 45, it is not suitable for poisonous and flammable medium pipeline or pipeline under vibration, pressure fluctuation and alternating load due to temperature change.
Material characteristics of large elbows
When the arcing section of carbon steel elbow is a butt weld, these changesofexternal load will cause the weld to be in a complex stress state, seriously weaken the strength of the weld, reduce the working ability of the carbon steel elbow, and shorten the service life of the carbon steel elbow. Compared with solid steel such as round steel, steel pipe has the same bending and torsion strength, lighter weight, and is an economic section steel. It is widely used in manufacturing structural and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle frame and construction. Steel scaffolding used in construction, etc. Because the circular area is the largest under the condition of equal circumference, more fluid can be transported by the circular pipe. In addition, when the ring section is subjected to internal or external radial pressure, the force is more uniform, so the vast majority of steel tubes are circular tubes.
Process Standard and Quality Control of large elbows
Feeding - Physicochemical - Blanking - Hot Forging - Heat Treatment - Inspection - Gold Processing - Finished Product Inspection - Marking - Finished Product Inspection - Marking - Packaging Typing - Delivery.