What is an acceptable method for sealing a grease duct?

Brazing is recognized as an acceptable method for sealing grease ducts due to its ability to create strong, durable joints that can withstand the high temperatures and potentially corrosive environments present in grease ducts. This method involves melting a filler metal at a high temperature, which flows into the joint and, once cooled, forms a robust bond that is both airtight and secure.

Additionally, brazing provides a seamless seal that is resistant to the accumulation of grease and other residues, which is critical for maintaining proper ventilation and preventing fire hazards. The method is also compliant with industry standards that govern the installation and maintenance of grease ducts, ensuring that systems operate efficiently and safely.

While welding is another strong joining technique often used for metal, it may not be practical in all situations due to the high skill level required and potential distortion of the duct material. Adhesive sealing may not provide the same level of durability or heat resistance as brazing, and riveting typically does not offer an airtight seal necessary for grease ducts. Thus, brazing stands out as the most appropriate choice for this application.