Welcome to Jinling Steel (Shandong) Group Co., Ltd.
Steel Pipe Elbow
Classification :
Pipe fitting
Key Words:
Pipe fitting
Seamless Elbow Manufacturing Process (Heat Bending & Cold Bending)
One of the most common methods for manufacturing elbows is using hot mandrel bending from straight steel pipes. After heating the steel pipe at a elevated temperature, the pipe is pushed, expanded, bended by the inner tools of mandrel step by step. Applying hot mandrel bending can manufacture a wide size range seamless elbow. The characteristics of mandrel bending are strongely depend on the intergrated shape and dimensions of the mandrel. The using advantages of hot bending elbows include smaller thickness deviation and stronger bending radius than other bending methond type. Meanwhile, using bending instead of prefabricated bends substantially reduces the number of welds needed. This reduces the amount of work required and increases the quality and usability of pipes. However, cold bending is the process to bent the straight steel pipe at normal temperatures in a bending machine. Cold bending is suitable for pipes with an outer diameter of 17.0 to 219.1 mm, and wall thickness 2.0 to 28.0 mm. The recommended bending radius is 2.5 x Do. Normally at a bending radius of 40D. By using cold bending, we can get small radius elbows, but we need to pack the internals with sand to prevent wrinkling. Cold bending is a quick and inexpensive bending method. It is a competitive option for making pipelines and machine parts.
Welded Elbow Manufacturing Process (Small & Large)
Welded elbows are made from the steel plates, so it is not seamless steel elbows. Use a mould and press the steel plate to the shape of the elbow, then weld the seam to be a finish steel elbow. It is the old production method of the elbows. Recent years the small sizes elbows are almost manufactured from the steel pipes now. For the big size elbows, for example, it is very difficult to produce elbows over 36” OD from the steel pipes . So it is commonly made from the steel plates, pressing the plate to the shape of half elbow, and welding the two halves together. Since the elbows are welded in its body , the inspection of the welding joint is necessary . Commonly we use the X-Ray inspection as the NDT.
PACKING AND SHIPPING
We have our own transportation fleet with the most convenient transportation and timely delivery.The company's products are exported to more than 70 countries and regions in the world, including Europe, America, Germany, South Korea, Indonesia, Bangladesh, etc.
FACTORY APPEARANCE
The company has advanced production equipment and technical strength, adopts internationally advanced production technology and quality control system to ensure that each batch of steel can meet or exceed international standards. Equipped with a complete product production line, the main equipment includes cutting machines, bending machines, punching machines, water jet cutting machines, polishing machines, plate cutting machines, wire drawing machines, etc. Our products include carbon steel, stainless steel, steel pipes, steel coils, steel plates, building materials: bars, wires, spiral coils, round steel; pipes: seamless pipes, welded pipes; plates: cold and hot rolled plates/coils, thick plates, color coated plates (galvanized plates, color steel plates, galvanized aluminum steel), silicon steel, strip steel; steel sections: working channel steel, H steel, square steel, flat steel, ball flat steel; up to 72 kinds of steel, with a stock of more than 200,000 tons.
FACTORY APPEARANCE
Our products are complete in variety, sufficient in stock, of excellent quality, low in price and considerate in service. At the same time, we are also the designated supplier of many large enterprises, providing steel for major project renovations in many countries. At the same time, we have also established a professional international trade service team, with a global sales network. With many advantages, we cooperate with customers in North America, South America, Europe, Southeast Asia, the Middle East and Africa, and have established business in Peru, the Philippines, Russia, Ukraine, Belarus, Uzbekistan, Pakistan, Indonesia, Malaysia, South Africa and other places. Products are exported to more than 30 countries including Africa, Sri Lanka, Turkey, Vietnam, Laos, Brazil, Thailand, the Middle East, the United Arab Emirates, Morocco, Spain, the United States, New Zealand, Iran, etc.
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Office Address
Located in Jinan Free Trade Pilot Zone, Shandong Province
China is an international steel trade hub. We will connect China's steel resources with the world trade needs in a fast, stable and low-cost way through high-quality products. Together with partners from all over the world, common development, win-win cooperation! Hand in hand to heavy trust, create a better future!
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