Carbon steel material can be divided into

Carbon steel: 10# 20# A3 Q235A 20g Q345B 20G 16Mn ASTM A234 ASTM A105 st37 ASTM A403,A234WPB, A420WPL6 St37,St45, E24, A42CP, 16Mn, Q345, P245GH,G3452,SS400,P235GH, P265GH, P280GH,P295GH,P355GH,CS Ct20 and etc.

Pipeline steel: WPHY42, WPHY52, WPHY60, WPHY65,WPHY70, WPHY80 and etc.

Cr-Mo allo steel: P11,P22,P5, P9,P91, 10CrMo9-10, 16Mo3 ,16Mn,  etc

Elbows made of these materials as raw materials can be called carbon steel elbows according to Angle: 45°, 90°, 180° these three commonly used elbows, and other engineering needs can be specially customized such as 60° or other angles.

Connection with carbon steel pipe: 

welding, flange connection, thread connection, socket connection and other forms.

According to the form of the process can be divided into: 

welding elbow, stamping elbow, casting elbow, etc.

Use: 

Connect two pipes to change the direction of the pipe, to 45° or 180° and 90° direction or other angles.

Manufacturing standard: 

national standard, American standard, Japanese standard, German standard, Russian standard.

The basic process of carbon steel elbow is: 

first weld a polygonal ring shell with a cross section or a polygonal fan-shaped shell with both ends closed, and after the internal pressure medium is filled with internal pressure, the cross section gradually becomes a circle under the action of internal pressure, and finally becomes a circular ring shell. According to the need, a circular shell can be cut into 4 90° elbow or 6 60° elbow or other specifications of the elbow, the process is suitable for the manufacture of elbow middle diameter and elbow inner diameter ratio of more than 1.5 times any specification of large elbow, is the ideal method for manufacturing large carbon steel elbow.