What are the correct steps for making a solder joint?

What are the correct steps for making a solder joint?

• A. Flux, Ream, Clean, Assemble and Solder
• B. Ream, Clean, Flux, Assemble and Solder
• C. Ream, Clean, Solder, Flux and Assemble
• D. Ream, Clean, Flux, Assemble and Solder

Answer: (D)

Getting a reliable solder joint hinges on preparing the pipe and fitting so the solder can wet the metal and flow smoothly into the joint. Reaming removes burrs and creates a smooth edge, which helps the pieces fit tightly and lets the solder flow evenly. Cleaning after reaming removes oils, dirt, and oxidation that would block wetting. Flux is then applied to the mating surfaces to prevent oxidation during heating and to promote capillary action so the solder is drawn into the joint. With clean, fluxed surfaces, assemble the joint so it’s properly aligned and seated before heating. Finally, apply heat and feed solder into the joint so the solder flow completes the seal. Skipping any step or misordering it can leave burrs, oils, or oxides that prevent good wetting and a solid leak-tight connection.

Getting a reliable solder joint hinges on preparing the pipe and fitting so the solder can wet the metal and flow smoothly into the joint. Reaming removes burrs and creates a smooth edge, which helps the pieces fit tightly and lets the solder flow evenly. Cleaning after reaming removes oils, dirt, and oxidation that would block wetting. Flux is then applied to the mating surfaces to prevent oxidation during heating and to promote capillary action so the solder is drawn into the joint. With clean, fluxed surfaces, assemble the joint so it’s properly aligned and seated before heating. Finally, apply heat and feed solder into the joint so the solder flow completes the seal. Skipping any step or misordering it can leave burrs, oils, or oxides that prevent good wetting and a solid leak-tight connection.