he mast arm is used to place traffic and street signs above the roadway for maximum visibility throughout the City. A bracket is usually used to connect the signs to the mast arm. The type of Mast arm that can be also used as a street light arm is called Joint Use Mast Arm

Seamless pipe as the name suggests is a pipe without a seam or a weld-joint in contrast to Seam or Welded pipe. In a Seam or Welded pipe, the seam or the weld-joint is the weaker part of the pipe limiting the strength of the pipe to the strength of the weld-joint.

Expansion joints (bellows) Expansion joints are installed in a piping system to absorb vibration and shock. They also have advantages such as reducing the noise and compensate caused by misalignment. Special expansion joints can also be designed for thermal expansion in hot applications.

Pipe beveling is an angle forming between the edge of the end of pipes or tubes. When the pipe end is formed with a certain degree of an angle, it is called a bevel end or beveled end. Pipe beveling is an essential step in the welding preparation process of pipe joining.