Final answer:
The statement is false. The statement is false because a welded tee joint without deep penetration, despite being welded on both sides, will likely be weaker than one with deep penetration, which creates a stronger and more durable joint.
Step-by-step explanation:
A welded tee joint that is welded on both sides may appear strong superficially. However, if the weld does not have deep penetration, it is likely to be weaker than a weld that does, particularly under dynamic or high-load conditions.
Deep penetration ensures that the weld material fuses well with the base materials, creating a much stronger joint. Thus, for the joint to endure stresses and carry significant loads without failure, proper penetration is critical.