Athulya Bellows & Engineering [P] Ltd. Offers In-line Pressure Balanced Bellow. Athulya Bellows & Engineering [P] Ltd. Supplies metallic expansion bellows / joints / compensators and corrugated hoses. In-line Pressure Balanced Bellow is entirely axial, and there is no directional change in the pipe. In-line Pressure Balanced Bellow can also be used to replace pipe loops may be seen in reduced pumping energy by the elimination of the loop`s elbow-generated pressure losses. This may also allow reducing the pipe size for the entire system. It is used when axial deflections exist, and anchoring is impractical for structural or economic reasons, such as high in the air or short straight pipe runs between two large vessels.