| 摘要 |
<p>A pipeline (1) for the transport of a congealable solution of cellulose in an aqueous organic solvent wherein the pipeline (1) is provided with at least one over-pressure relief device comprising a disc (11) displaceable under the action of pressure to form a vent for the pipeline (1), whilst the disc (11) is inserted into a branch (2) of said pipeline (1), characterised in that at least a part of the surface of the bursting disc (11) is arranged in alignment with the inside of the wall (1a) of the pipeline (1) so the material passing through the pipeline (1) washes the surface of the disc (11) thus keeping it cleen.</p> |
