What is the difference between integral welding and segmented welding of trailer beams

Many overseas customers only consider the price when buying trailers and do not understand the importance of beam welding technology. In fact, the main beam is the core skeleton of the trailer. Although the appearance of integral welding and segmented welding may seem similar, there is a huge difference in bearing capacity, torsion resistance, and service life, especially in Africa, mining areas, and heavy road conditions where the durability of the two processes is vastly different.
What is segmented welded beam?
Segmented welding is the process of assembling and welding multiple steel plates into a shape, and it is also a commonly used technique for low-priced trailers on the market. The advantages are low cost, fast production, and material saving. But the disadvantages are very obvious: there are a large number of welding interfaces at the splicing position, and the stress points are scattered. When the trailer is subjected to long-term heavy loads, bumps, and potholes, the joint welds are prone to stress concentration. Over time, problems such as weld cracking, beam deformation, and side bending may occur.
For overseas mining areas and long-distance heavy-duty transportation, the repair rate of segmented welding trailers is high, and the later maintenance costs are high, which belongs to the typical "low price but not durable".
What is an integral welded beam?
One piece fully welded beam, made of full-length steel, using a one-time submerged arc welding process, with no intermediate splicing breakpoints throughout the entire process. The overall integrity of the vehicle's main beam is strong, with uniform force distribution and no weak joints, greatly improving its resistance to torsion and tension.
Our factory's export trailers uniformly adopt fully automatic integrated submerged arc welding technology, with full and smooth welds, high penetration, and stronger overall rigidity. When driving under full load, bumpy road conditions, and emergency stress, the main beam is not easily deformed or cracked, making it very suitable for long-term operations under heavy loads and harsh road conditions overseas.
Summary of actual usage gap
In terms of load-bearing capacity: the integrated welding has stable load-bearing capacity and does not carry heavy loads; Segmented welding under heavy load is prone to fatigue deformation.
In terms of durability, the one-piece welding of the entire vehicle has strong overall integrity and a longer service life; Segmented welding joints are prone to rusting and cracking.
In terms of maintenance: integrated welding is basically maintenance free; Frequent repair welding and maintenance in the later stage of segmented welding can delay the construction period.
Simply put, for short-term temporary use, segmented welding is an option. For long-term overseas operations and heavy-duty engineering transportation, welding the main beam together is the most cost-effective choice. All export engineering trailers, low flatbed trailers, and self dumping trailers from our factory adopt integrated beam technology to ensure vehicle durability from the source and adapt to complex working conditions in various countries.