Elbow : Metal fittings that change the direction of the pipeline system

Size
1/2″-72″
Wall Thickness
SCH10,SCH20,SCH30,STD,SCH40,SCH60,XS,SCH80,SCH100,
SCH120,SCH140,SCH160,XXS, DIN, JIS standard thickness

The carbon steel elbow is a metal pipe that changes the direction of the pipeline on the carbon steel pipe. The connection way has the wire buckle and the welding. According to the angle, there are 45° and 90°180° three of the most commonly used, in addition to the engineering needs, including 60° and other abnormal angle elbow. Elbow materials are cast iron, stainless steel, alloy steel, malleable iron, carbon steel, non-ferrous metals and plastics. The way to connect with the pipe is: direct welding (the most common way) flange connection, Hot melt connection, electro-fusion connection, thread connection and socket connection. According to the production process can be divided into: welding elbow, punching elbow, push elbow, casting elbow.

Other name: 90 degrees elbow, right angle bending, love and bending.

Carbon steel quality can be divided into : 10# 20# A3 q235a 20g q345b 20G 16Mn ASTM A234 ASTM A105 ST37 ASTM A403 etc

The elbows made of these materials are called carbon steel elbows.

90° Carbon steel elbow angle: 45°, 90°, 180° these three kinds of commonly used elbow, other engineering needs, can be customized such as 60° or other angles.

and carbon steel pipe connection mode: Welding, flange connection, thread connection, socket connection and other forms.

According to the technical form can be divided: welding elbow, punching elbow, casting elbow.

Use: Connect two tubes to make the pipe change direction, turn to 45° or 180° and 90° direction or other angles.

Manufacturing Standards: GB, American Standard, Japanese standard, German standard, Russian standard. The basic process of carbon steel elbow is: firstly, welded a polygonal ring shell with a cross-section of polygons or a multi ribbed fan shell closed at both ends, the inner pressure medium is filled with internal pressure, and the cross section is gradually transformed into a circle by the polygon, and finally becomes a circular ring shell.

According to the need, a circular ring shell can be cut into 4 90° elbow or 6 60° elbow or other specifications of the elbow, the process is suitable for manufacturing elbow diameter and elbow diameter than 1.5 times times the size of any large elbow, is the ideal way to make large carbon steel elbow.

1) Carbon steel pipe elbow fittings
2) Standard: ASME B16.9/B16.11/B16.28, MSS SP-75 , DIN 2605-2617, JIS B 2312， EN 10253-1
3) Outside diameter: φ21-φ2540mm （1/2”-100″)
4) Pressure grade: WT 2-,60mm (SCH20-SCH160)
5) Material: A234 WPB, A420 WPL6; A860 WPHY 42/ 52/ 60/ 65/ 70 ; STPG 370， P235TR , P355N;

6）Product usage: Carbon steel elbow mainly used for — container equipment pipelines, the pipelines of petroleum, natural gas and water.

Material

The advantages of the production process of the carbon steel elbow are mainly shown in the following aspects:

(1) without the need of tube billet as raw material, can save pipe equipment and mold costs, and can be arbitrarily large diameter and relatively thin wall thickness of carbon steel elbow.

(2) The blank is flat or developable surface, so the blanking is simple, the precision is easy to ensure, assembly and welding is convenient. (3) Due to the above two reasons, can shorten the manufacturing cycle, the production cost greatly reduced.

Due to the need for no special equipment, especially suitable for on-site processing of large carbon steel elbow.

(4) Carbon steel elbow for oil, natural gas, chemical, hydropower, construction and boilers and other industries pipeline series. Carbon steel elbow resistance to air, steam, water and other weak erosion medium and acid, alkali, salt and other chemical etching of the corrosion of steel. and the rear axle housing of the butt welding, all kinds of connecting rods, rod butt welding, as well as special parts of the butt welding. New wear-resistant carbon steel elbow is a kind of ceramic and metal organic combination to form a composite pipe, carbon steel elbow synthesis of alumina hardness high, chemical inertia good and the head will not have quality assurance. To improve the corrosion resistance of carbon steel elbow in reducing medium, especially to resist chloride local corrosion. Improve the high temperature mechanical properties of austenitic stainless steel tee, improve the strength and temper stability of carbon steel elbow, the research shows that MO improves the corrosion resistance of carbon steel elbow in reducing medium, mainly because molybdate is the anode inhibitor, MO and CR compound action enhances the passivation and passivation ability of carbon steel elbow (passivation film repair ability),

Improve the stability of the passivation film, so that stainless steel has a better corrosion resistance. The wear and tear of carbon steel elbow has always been a factor affecting the production of safe civilization, and with the development of science and technology, materials have been constantly innovated, and the materials such as cast stone, cast steel, alloy and centrifugal pouring composite ceramics have been appeared successively. The pipeline lining alumina ceramic with its high wear resistance, high hardness, oxidation resistance, good corrosion resistance and high resistance to high and low temperature strength performance, foreign imports of equipment, most of the carbon steel stamping elbow. Normalizing is the carbon steel elbow heated above the critical temperature, so that the carbon steel elbow all turned into uniform austenite, carbon steel elbow manufacturers then in the air natural cooling heat treatment method.

It can eliminate the mesh cementite of hot pressing elbow, it is more economical for the hot pressing elbow to refine the crystal lattice, to improve the comprehensive mechanical properties, and to replace the annealing process with the normal fire.