A pickle line assembly is provided having a roll tank, a pickle tank, and an expansion seal. The roll tank includes a front and rear face that are angled towards one another at the upper end. The pickle tank includes front and rear openings, which can be brought into registration with an opening in the front face and rear face of the roll tank. Expansion seals are configured to surround a perimeter of the pickle tank substantially near the front and rear openings, and are angled at approximately the same angle as the front and rear face of the roll tank. The expansion seal encloses the path between the pickle tank and roll tank, and the tilt angle of the front and rear face of the roll tank allow the pickle tank to be vertically raised and lowered into position without interference.