Abstract: A seamless coating system especially applicable to a welded bell and spigot type joint for steel pipe of exceptionally great length and diameter features a double layer of coating material applied to the outside surface of the pipe and extending over the joint. Use is made of a filler bridge of substantially solid elastomeric material which, though yieldable when covered with the coating material and compressed, yields only to a limited degree. The bridge is made slightly thicker than the thickness of the pipe wall so that when the bridge is applied against a sharp corner at the joint, the bridge material extends above the corner both before and after two successive layers of coating material are applied to the exterior of the pipe wall and the joint.