Today we will mainly introduce the flange in the drum closure, which is made of cold-rolled steel and is divided into 2-inch and 4/3-inch sizes for standard 55-gallon stainless steel drums. The surface of the flange is galvanized with Cr3 or Cr6, also known as CR3+ (white) and CR6+ (yellow), respectively for chrom3 and chrom6. CR3 epoxy phenolic paint is used for food and chemical grade drums. During the painting process, the cap can protect the steel drum from internal pollution.
Before use, the flange should be riveted onto the top of the drum. After riveting, a base for the drum plug to be screwed into is formed. Users can choose steel drum plugs, plastic drum plugs or nylon drum plugs according to the contents inside the drum. Proper torque is essential when screwing in the drum plug. Excessive or insufficient torque can result in container leakage. After the flange is installed, a drum sealing system is formed. The riveting of the flange is crucial for the final sealing effect. Regular maintenance is necessary to ensure the quality of riveting. If there is a problem, the key parameters such as the height of the flange after riveting should be checked. The gasket below the flange can be customized in terms of color and quantity.
The working principle is to press the gasket between the flange sealing surfaces by tightening the bolts, and fill the gaps on the uneven sealing surface of the flange, preventing media leakage through the capillary pores inside the gasket and the interface leakage between the gasket and the sealing surface, thereby achieving pre-sealing.
Closure Flange will protect drum content with maximum security, free from leakage and contamination.
Finished with zinc plated passivation in Chrome 3 and Chrome 6, or coated with epoxy phenolic.
NBR, EPDM and PE Gasket are available according to various drum filers. Along with numerous drum content, PE, NBR, EPDM Gasket can be chosen.
Its size is 2 inch or 3/4 inch, for standard drum 55 gallon stainless steel drum, flange surface process is galvanized Cr3 or Cr6.
The octagonal flange is supposed to riveted on metal drum lid providing a seal base for drum plug to be torqued on.
Drum flange needs to be riveted onto drum top by flange insertion die before using. It forms a base for drum plug to screw in after drum flange riveted. Customers could choose steel drum plug, plastic drum plug or nylon plug based on contents in the drum.
Flange riveting is crucial in terms of final sealing results. Regular maintenance or replacement of insertion die is necessary to keep riveting quality. Key parameters, including insertion die abrasion and flange height after riveting, need to be checked if problems occur.
Galvanization is always the major process in the production of drum flange that could lead to pollution. Each single piece of drum flange is zinc plated from lines that execute the theory of environmental protection throughout the whole process.
Standard gasket for lacquered drum flange includes EPDM, NBR and dual gasket. Special formulated gaskets are available on requests. Once riveted onto drum top, coated flange is able to provide maximum sealing effects for the steel drum.
Every piece of drum plug will go through the leakage inspection machine before packaging. We are always making efforts to keep the filers in steel drums safe.
Drum plug is G2 drum plug and G3/4 with lacquered resins for better resistance to the drum filers, such as food contact, solvent corrosion and high temperature.m Lacquered drum plug is G2 and G3/4 drum plug with lacquered resins for better resistance to the drum filers, such as food contact, solvent corrosion and high temperature.plug is G2 and G3/4 drum plug with lacquered resins for better resistance to the drum filers, such as food contact, solvent corrosion and high temperature. plug is G2 and G3/4 drum plug with lacquered resins for better resistance to the drum filers, such as food contact, solvent corrosion and high temperature.e drum filers, such as food contact, solvent corrosion and high temperature.
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