DOM (Drawn Over Mandrel) and HREW (Hot Rolled Electric Welded) are two types of steel tubing commonly used in various applications, including automotive, construction, and manufacturing.
DOM tubing is made by drawing a solid steel bar through a die and over a mandrel, which creates a smooth and seamless tube with consistent wall thickness. DOM tubing has superior strength and dimensional accuracy compared to other types of tubing. It is typically used in applications where strength and precision are critical, such as in high-performance automotive or aerospace components, hydraulic cylinders, and industrial equipment.
HREW tubing, on the other hand, is made by rolling a steel sheet into a tube shape and welding the edges together using an electric current. HREW tubing is less expensive than DOM tubing and is often used in applications where strength and precision are not as critical, such as in handrails, fences, and light structural applications.
In terms of their physical properties, DOM tubing generally has a smoother surface finish, tighter tolerances, and greater consistency in wall thickness than HREW tubing. This makes DOM tubing more suitable for applications that require high strength, precision, and dimensional accuracy. HREW tubing is generally less expensive and is more suitable for applications that do not require the same level of strength or precision.
In summary, DOM tubing is stronger, more precise, and more expensive than HREW tubing, which is less expensive and suitable for applications that do not require the same level of strength or precision. The choice between these two types of tubing depends on the specific application requirements, such as strength, precision, cost, and availability.