Round Tank-Side Flange for Bottom Valve Installation
In fuel tanker manufacturing and liquid transportation systems, the connection between the tank body and the bottom valve is one of the most critical structural interfaces. This connection point must maintain stable sealing performance and mechanical strength under long-term vibration, thermal expansion and contraction, frequent loading and unloading, and demanding operating conditions.
The HBBVTSFL-XXXR Series Heavy-Duty Round Tank-Side Flange is specifically developed for bottom valve installation on tank trucks. Welded directly to the tank bottom outlet, it provides a solid and precisely aligned mounting base for bottom valves that comply with EN13308 or TTMA standards.
Unlike ordinary light-duty flanges, this series is designed for use during the vehicle manufacturing stage as a welded structural component. Its thickened round profile significantly enhances overall rigidity and distributes mechanical stress more evenly around the tank outlet. Once welded, the flange becomes an integral part of the tank structure, helping the bottom valve maintain accurate coaxial alignment and uniform gasket compression, effectively reducing the risk of leakage caused by installation deviation or long-term operation.
In different countries and regions, this type of tank-side flange may be referred to by various names, although the function remains the same. Common names include tanker bottom valve mounting flange, tank-side welding flange, bottom discharge valve connection flange, tank bottom outlet round flange, bottom valve mounting base, bottom valve connection plate, and the industry-standard term Tank Bottom Valve Mounting Flange. Despite the differences in terminology, the core purpose is always to provide a reliable, stable, and leak-tight connection interface for tanker bottom valves.
The HBBVTSFL-XXXR Series is widely used in fuel transport tank trucks, chemical liquid tankers, hazardous material transport vehicles, and industrial liquid storage and transfer equipment. Its standardized dimensional design makes it especially suitable for internationally oriented tanker projects and large-scale vehicle manufacturing.
In terms of material selection, this series can be manufactured in carbon steel, stainless steel, or aluminum alloy to suit different operating environments, corrosion resistance requirements, and vehicle weight control needs.
It is important to note that when the flange body is produced in aluminum alloy, each bolt hole is equipped with a reinforced threaded sleeve. This design significantly improves thread strength and effectively prevents thread damage under frequent assembly, disassembly, or high-torque fastening conditions, ensuring long-term connection reliability and operational safety.
Thanks to precision machining, the sealing surfaces and bolt hole positioning of this series meet high accuracy standards, facilitating efficient bottom valve installation while maintaining consistent sealing performance throughout long-term service.
The series is compatible with common 3-inch, 4-inch, and 6-inch tanker bottom valve sizes, supporting structural standardization and interchangeability across different vehicle models.
In hazardous liquid transportation, every connection component is more than just an accessory—it is an essential part of the vehicle’s overall safety system. Selecting a properly engineered heavy-duty tank-side flange not only improves assembly efficiency but also helps reduce maintenance costs and safety risks over the vehicle’s service life.
For additional sizes, material options, or customized solutions, please feel free to contact us. We can provide technical support and tailored configurations based on different national standards and project requirements.
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