Riveted joints: purpose of caulking operation In plate joints for boilers/tanks, caulking is done after riveting. Identify the primary objective of caulking.

ConceptCaulking peens/burrs the plate edges along the riveted seam to close capillary gaps, ensuring fluid tightness of boiler and tank joints.

NotesIt is not intended to raise tensile capacity nor to remove stresses; it specifically improves tightness against leakage.

Final AnswerTo make the joint leak-proof.