Seamless Tubing for Process Automation – I

Seamless tubes are also referred as cold drawn seamless pipes, which are used in the exchange of liquids (especially hot fluids). Numerous liquids are made to pass through the pipes and bars. These tubes are ideally a solid metal tube with each end connected to another tube without having any welding joint. Seamless tubes are made from high graded alloys and metal, which include carbon steel, stainless steel, tungsten or molybdenum. These tubes are used in diverse industrial applications like microelectronics and semiconductors that demands highest security requirements. Read this post to understand what seamless tubing can offer when compared to welded tubing.

Difference between Seamless Tubing and Welding Tubing

Seamless tubes are often used in applications adhering to high safety requirement. The customer’s specification for sanitary steel process piping and fittings varies with the nature of tubes available in the market. Welded stainless steel tubing is other type of tubing, in which the welded tubes are fabricated from long skinny sheets of metal rolled into tube space and machine welded at the same time. Hence, choosing the best tubing material for your application requires right decision making. Here is the comparison between seamless and welding tubing.

  • Seamless tubes are manufactured using a rotary piercing and rolling machine in which a conditioned steel round bar is heated up to its forging temperature. The conditioned steel round bar is finally pierced on a mill, which works the bar making it flow around a piercer point forming a hollow billet. While in welding tubing manufacturing process, when the steel coil of proper gauge thickness is rolled at the steel mills, a coil of flat strip is yielded out.
  • Seamless tubing is often considered to be higher integrity product in comparison to welded sanitary tube because of the absence in longitudinal weld seam.
  • Seamless tubing comes with better surface finishing, especially in smaller sizes, while in welded tubing the rough surface around the weld bead causes surface roughness. With the advancement in manufacturing techniques, this concern has been taken care of.
  • Seamless tubes are anti corrosive in comparison to welded tubes which makes it a better choice for working in environment affected by corrosion.
  • Seamless tubes are comparatively shorter in length in comparison to welded tubes, which can be fabricated in long continuous length.

Seamless tubes are one of the most critical process control equipment, which are available in wide range of sizes and configurations. In the next post, we will discuss the advantages of seamless steel tubes, which make it a first choice for several industrial applications.