Carbon Steel Tubes

Product Description

Carbon steel tubes are strong, durable, and cost-effective tubular products widely used across industrial, mechanical, pressure, and structural applications. They vary by standard, carbon content, and manufacturing process.

Key Types & Common Standards

1. Seamless (SMLS) Carbon Steel Tubes

   • ASTM A106 (Grades A, B, C): Designed for high-temperature and high-pressure service (e.g., boilers, refineries).

   • ASTM A179 / ASTM A192: Seamless cold-drawn low-carbon tubes used for heat exchangers, condensers, and high-pressure boiler service.

   • ASTM A333 (Grade 6): Intended for low-temperature service.

2. Welded Carbon Steel Tubes

   • ASTM A53 (Grades A, B): General-purpose black and hot-dipped galvanized tubing for mechanical, plumbing, and low-pressure steam/gas applications.

   • API 5L (Grades B to X70): Standard for line pipes used in onshore and offshore oil and natural gas transportation.

3. Mechanical & Structural Tubing

   • ASTM A513 (DOM / Cold Rolled): Precision mechanical tubing made via Electric Resistance Welding (ERW) or Drawn Over Mandrel (DOM) process for smooth bores, tight tolerances, and high yield strength.

   • ASTM A500: Cold-formed welded and seamless structural tubing in round, square, and rectangular profiles for construction, framing, and machinery.

   • How to Choose

     • For High Pressure/Temperature: Opt for seamless tubing (e.g., ASTM A106 Gr. B or A192).

     • For Structural/Framing Work: Choose welded square or rectangular tubing (e.g., ASTM A500).

     • For Precision Mechanical Parts: Select DOM cold-rolled tubing (e.g., ASTM A513).