Which term describes intersecting the pipe at a single point to the inner circumference of the pipe?

• A. Intersecting the pipe at multiple points
• B. Tip almost tangent
• C. Intersection at the outer circumference
• D. Parallel alignment

Answer: (B)

When a line touches a circle at exactly one point, it’s tangency. For the inner circumference of a pipe, a contact that occurs at a single point means the edge is effectively tangent to that inner wall. In welding terminology, describing the tip as almost tangent communicates that the contact is nearly a perfect touchpoint with the inner surface, rather than crossing through or staying parallel. The other ideas describe different geometries: intersecting in two points would be a cut-through, touching the outer circumference would be tangent to the outer wall, and parallel means no contact with the inner surface. So the term that best captures a single-point, near-tangent contact with the inner circle is “tip almost tangent.”