Carbon steel elbow is a kind of pipe fittings which can change the direction of pipeline. Mainly divided into carbon steel 45 degree pipe elbow, 60 degree elbow, 90 degree elbow, 180 degree elbow, in addition to 30 degree elbow, 60 degree elbow and customer drawings customized elbow. Carbon steel elbow can be divided into long radius elbow and short radius elbow according to its curvature radius. A long radius elbow is the outer diameter of a pipe whose curvature radius is equal to 1.5 times, R=1.5D. Short radius elbow means that its curvature radius is equal to the outside diameter of the pipe, that is, R = 1.0D.
Carbon steel elbows are resistant to weak erosion media such as air, steam and water and chemical erosion media such as acid, alkali and salt. Also known as stainless acid-resistant steel. In practical application, steel resistant to weak erosion medium is often called stainless steel stamping elbow, while steel resistant to chemical erosion medium is called acid-resistant steel. Because of their differences in chemical composition, the former is not necessarily resistant to chemical erosion, while the latter is generally stainless.
The basic process of Carbon steel 45 degree pipe elbow:
Firstly, a polygonal annular shell with polygonal cross-section or a polygonal fan-shaped shell with closed ends is welded. After the pressure medium is filled, the internal pressure is applied. Under the internal pressure, the cross-section gradually changes from polygonal to circular, and finally becomes a circular annular shell. However, due to the characteristics of single-piece production and low cost, stamping elbow skills are mostly used in the manufacture of small batches and thick-walled elbows. The national standard elbow has hollow section and is widely used as a pipeline for conveying fluids, such as oil, natural gas, gas, water and some solid materials.
Attribute parameters of Carbon steel 45 degree pipe elbow:
1. Implementation criteria: ASME B16.9, MSS SP-75, EN, DIN, JIS, DL, GD, SH
2. Carbon steel and other materials:
Carbon steel: ASTM/ASME A234 WPB-WPC
Alloys: ASTM/ASME A234 WP1/WP5/WP9/WP11/WP12/WP22/WP91
Stainless steel: ASTM/ASME A403 WP304-304L-304H-304LN-304N ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti ASTM/ASME A403 WP 321-321H ASTM/ASME A403 WP 347-347H
Low Temperature Steel: ASTM/ASME A402 WPL 3-WPL 6
High Performance Steel: ASTM/ASME A860 WPHY 42-46-52-60-65-70
3. Wall thickness: sch10, sch20, sch30, std, sch40, sch60, xs, sch80, sch100, sch120, sch140, sch160, xxs, sch5s, sch20s, sch40s, sch80s. Maximum wall thickness: 150mm
4. Surface treatment: anti-rust black paint, anti-rust varnish, transparent anti-rust oil, hot-dip galvanizing, cold-dip galvanizing, sandblasting, 3PE coating, epoxy coating.
5. Applications: Widely used in electric power, petroleum and natural gas, chemical industry, shipping, heating, paper-making, metallurgy, construction, medicine and other industries.
6. Product quality: It has passed the ISO 9001 international certification, effectively controlled the whole production process, and obtained the special equipment manufacturing license.
Technological characteristics of Carbon steel 45 degree pipe elbow:
Carbon steel elbow forming process uses special elbow pusher, core die and heating device. In order to achieve the billet on the die moving forward under the push of the pusher, it is heated, enlarged and bended in motion. The deformation characteristic of carbon steel elbow is to determine the diameter of tube billet according to the rule that the volume of metal material remains unchanged before and after plastic deformation. The diameter of tube billet used is smaller than the diameter of elbow. The deformation process of billet is controlled by the core die, so that the compressed metal flow in the inner arc can be supplemented to other parts which are thinned due to the expansion of diameter, and thus the diameter of tube billet can be obtained. Carbon steel elbow with uniform wall thickness.
Carbon steel elbow forming process has the characteristics of beautiful appearance, uniform wall thickness and continuous operation, which is suitable for mass production of products. Therefore, it has become the main manufacturing method of carbon steel and alloy steel elbow, and also used in the manufacture of stainless steel elbow of some specifications. The heating methods of forming process include medium frequency or high frequency induction heating (heating ring can be multiple or single loop), flame heating and reflex furnace heating. The heating mode depends on the product requirements and energy conditions.
Application characteristics of Carbon steel 45 degree pipe elbow:
Carbon steel elbow has good temperature and pressure resistance, flexibility and heat resistance, and its performance is higher than other plastic pipes. Easy installation, good thermal conductivity, suitable for floor heating system, recyclability. Stamping elbow pipe has excellent impact strength, which can be welded by hot melt and mechanically connected, and is superior to PB-PP-R in heat conductivity. In terms of design stress, the long-term compressive performance of stamping elbow is the best. However, due to various factors, the actual wall thickness of floor heating pipes is usually 2 mm. Under this wall thickness, all kinds of pipes can meet the requirements of floor heating, and the advantages of pressure resistance of national standard stamping elbow pipe can not be reflected.
Carbon steel elbow has the best compression resistance only in terms of design stress. Due to various factors, the actual wall thickness of floor heating pipes is usually the same, and under this wall thickness, all kinds of pipes can meet the requirements of floor heating, so the advantages of pressure resistance of carbon steel elbow pipes of national standard can not be reflected; thermal conductivity: pipes used for floor heating need good thermal conductivity, low-temperature thermal shock resistance and low-temperature impact resistance. It can be better.
Selection of Professional Manufacturers for Carbon Steel 45-degree pipe elbow
Our company was founded in 1982, and has 36 years of rich production experience. The company has passed international ISO 9001, IOS 14001, ABS, BV and other international certifications. It is a very good brand protection for customers. Over the years, our company has led the technological reform of the industry in the field of France and pipe fittings production, constantly reducing production costs, and striving to provide customers with the best quality and low price products. Carbon steel 45 degree pipe elbow production, not only strict control of raw materials, but also strict monitoring of each production progress, from semi-finished products to finished products.
