From the archive record
Two workers joining copper pipes by brazing at a construction site equipped with bamboo scaffolding. One worker operates a gas torch while feeding a thin filler rod into the heated pipe joint. The blue flame heats the copper, allowing the filler metal to flow into the connection and form a sealed joint. A colleague steadies the adjacent insulated pipes during the operation. Copper pipe brazing is commonly used in plumbing, refrigeration and heating, ventilation and air-conditioning (HVAC) installations. The footage captures on-site pipework and the precise handling of tools required for thermal joining.