Learn how agricultural sprayer frames are fabricated for crop protection equipment. Discover material selection, chemical resistance, and real-world manufacturing.
Introduction
Agricultural sprayers apply pesticides, herbicides, and fertilizers to crops, requiring frames that support spray tanks, booms, and pumps while resisting chemical corrosion. These frames must withstand vibration, chemical exposure, and field conditions. At Fulei Metal, we fabricate sprayer frame components for agricultural equipment manufacturers across Europe and Southeast Asia.
Sprayer Frame Types
Tractor-mounted sprayer frames attach to tractor three-point hitches. Trailed sprayer frames support sprayers on their own wheels. Self-propelled sprayer frames integrate sprayer with vehicle chassis. Boom support frames extend spray booms to cover wide swaths. Tank support frames hold spray solution tanks. Pump and valve housings protect spray system components.
Material Selection
Stainless steel (grade 304 or 316L) is the preferred material for sprayer frames due to superior corrosion resistance against agricultural chemicals. We use 2.0 to 4.0 mm sheet and tube. Galvanized steel provides cost-effective frames with adequate chemical resistance for less aggressive chemicals. Powder coating over galvanizing provides additional protection and color options. All materials must withstand continuous exposure to spray chemicals without degradation.
Design Considerations
Frames must support the weight of spray tanks when full, which can be significant. All components must resist corrosion from spray chemicals, including fertilizers, pesticides, and herbicides. Boom support frames must withstand wind loads and boom weight while maintaining boom stability. Designs must provide access for pump, valve, and nozzle maintenance. All edges must be smooth for operator safety. Components must accommodate various tank sizes and boom configurations. Chemical resistance must be verified for specific chemicals used.
Fabrication Process
Our TRUMPF fiber laser cuts frame components, tank supports, and boom brackets from flat sheet stock with precise dimensions. CNC press brake machines form frame profiles, support brackets, and mounting components. Tube processing equipment cuts and notches frame tubes. Component assembly uses TIG welding for stainless steel and MIG welding for galvanized steel, with continuous welds for chemical containment. Surface treatments include electropolishing for stainless steel, powder coating, and galvanizing.
Field Notes: Sprayer Boom Frames
A sprayer boom is a long, light structure that has to stay level, and those two requirements fight each other. Booms are now wide enough that an ordinary steel section would be too heavy to carry at the far end, so the structure is built from formed sections and triangulated rather than from heavy beams, and the design question becomes stiffness in bending and in torsion rather than strength. From a fabrication point of view that means the boom is welded in a fixture and checked for straightness over its whole length as well as for square, because a boom that is straight when it is built can still bend once its own weight is on it. The hinge and folding points are the other critical area, since a folding boom concentrates load at a small number of joints, and those joints are the parts that get checked for wear in service.
Conclusion
Agricultural sprayer frame fabrication requires chemical resistance engineering, structural design, and precision welding. Fulei Metal’s capabilities make us a trusted partner for crop protection equipment projects.
Fulei Metal builds components like this in-house. The DFM engineering review page explains how the process is set up and checked, while custom sheet metal fabrication covers the materials and finishes we normally run. Related reading: Go-Kart Frame Fabrication.