Classification of tee fittings

Folded in accordance with the form of butt classification

1.butt weld type tee: that is, and the connection of pipe fittings after welding tee fittings.

2.socket type tee: is inserted into the tee connection fittings into the ends of the tee after welding or fusion tee fittings.

3.ferrule type tee: is each end is a ferrule joint, the pipe inserted and then fastened tee fittings.

4.threaded tee: threaded tee fittings connected to the pipe.

Folded according to the material classification

Can be divided into stainless steel tee, carbon steel tee, copper tee, PVC tee, ductile iron tee, etc.

Folded according to the form of branch pipe classification

1.positive tee: is the branch pipe vertical main tee fittings.

2.oblique tee: is the branch pipe and the main pipe has a certain angle of the tee pipe fittings.

Tee fittings processing technology

Tee is a kind of pipe fitting used in the branch of the pipe. For the use of seamless pipe manufacturing tee, the process usually used are hydraulic expansion and hot press forming.

Folded Hydraulic Expansion

Hydraulic expansion of a tee is a forming process that expands the branch pipe by axial compensation of the metal material. The process is to use a special hydraulic press to inject liquid into the pipe billet with the same diameter as the tee, and squeeze the pipe billet through two horizontal side cylinders of the hydraulic press with simultaneous centering movement, the volume of the pipe billet becomes smaller after squeezing, and the liquid inside the pipe billet increases in pressure as the volume of the pipe billet becomes smaller. The stubs are expanded by flowing the metal material along the inner cavity of the mold under the dual action of the side cylinder and the liquid pressure inside the billet.

The hydraulic expansion process of the tee can be formed in one pass with high productivity; the wall thickness of the main tube and the shoulder of the tee are increased. Because of the large tonnage of equipment required for the hydraulic expansion process of seamless tee, it is mainly used for the manufacture of standard wall thickness tee less than DN400 in China. The applicable forming materials are low carbon steel, low alloy steel and stainless steel with relatively low tendency of cold work hardening, including some non-ferrous materials such as copper, aluminum and titanium.

Folding hot press forming

Tee hot press forming is a pipe billet larger than the diameter of the tee, flattened to about the size of the diameter of the tee, and a hole is opened in the part of the stretching branch; the billet is heated, put into the forming die, and the punching die for stretching the branch is installed in the billet; the billet is radially compressed under pressure, and the metal flows in the direction of the branch during the radial compression and forms the branch under the stretching of the punching die. The whole process is formed by the radial compression of the billet and the stretching process of the branch part. Unlike the hydraulic expansion tee, the metal of the hot pressed tee branch is compensated by the radial movement of the billet, so it is also called the radial compensation process.

The tonnage of equipment required for material forming is reduced due to the use of heated and then pressed tees. Hot pressing tee has wide adaptability to materials, and is suitable for low carbon steel, alloy steel, stainless steel materials; especially large diameter and thick wall tee, this forming process is usually used.

Expression of tee fittings

The expression is as follows: for equal diameter tee, such as "T3" tee means the outside diameter is 3 inches equal diameter tee. For the reducer tee, such as "T4×4×3.5" means the same diameter is four inches and the reducer tee is 3.5 inches.

The material is generally 10# 20# A3 Q235A 20g 20G 16Mn ASTM A234 ASTM A105 ASTMA403, etc. Tee, outside diameter range in 2.5″-60″, from 26″-60″for welded tee. Wall thickness 28-60mm.

Wall thickness grades are: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80, Sch100, Sch120, Sch140, Sch160, XXS.

Common reducer tee representation are: large diameter size ×small diameter size pressure grade or wall thickness

Such as: 3 "×2" 300LB or Sch40s. However, the common tee on the label is wall thickness Sch40s

Reducing tee, generally a professional term, tee for pipe fittings, pipe connections, used in the main pipeline to branch pipe at. Reducing tee is a kind of tee, tee has a general equal diameter tee, reducer tee two. Because the three ends can be connected to the pipe and named.

Tee is to represent the meaning of tee, equal diameter tee such as DN150 Sch40s, which is the equal diameter tee specifications, reducer tee such as DN150 * DN100 Sch40s * Sch20s, which is the specification of the reducer tee, please refer to the standard ASME B16.9.

Classification of tee fittings,Tee fittings processing technology,Expression of tee fittings

In this paper, the classification of tee fittings, the processing of tee fittings and the expression of tee fittings are mainly elaborated in three aspects.