When using two torches for brazing a large tube and fitting, the secondary torch should be positioned at approximately which o'clock position?

In the context of using two torches for brazing a large tube and fitting, positioning the secondary torch at approximately the 5 o'clock position is crucial for effective heating and control of the brazing process. This arrangement allows for optimal heat distribution around the joint while keeping one torch as the primary heat source.

When positioned correctly, the secondary torch at the 5 o'clock position helps to preheat the surrounding area, reducing the likelihood of thermal shock and ensuring the materials reach the appropriate temperature for the filler metal to flow properly. This coordinated heating strategy also enhances the overall efficiency of the brazing process, allowing for better seam integrity and reduced risk of defects in the joint.

Understanding the correct positioning of the torches is fundamental to achieving a successful braze, impacting the quality and strength of the connection made between the tube and fitting.