A fluid conduit assembly comprising: first and second fluid conduits ; a coupling including first and second coupling sections , each coupling section defining a respective hollow bore along which flowable material may flow, the first coupling section in fluid connection with the first fluid conduit , the second coupling section in fluid connection with the second fluid conduit , the coupling sections configured to be releasably coupled to each other; and at least one shut-off valve located within the hollow bore of at least one of the coupling sections , the or each shut-off valve including a valve member movable between a valve open position and a valve closed position in which the valve member shuts off the flow of a flowable material through the hollow bore, the or each valve member configured to move to its valve closed position on separation of the coupling sections , wherein the first coupling section is connected to the first fluid conduit so that a first end of the first coupling section extends inside a hollow bore of the first fluid conduit and a second end of the first coupling section is located outside the hollow bore of the first fluid conduit , and/or wherein the second coupling section is connected to the second fluid conduit so that a first end of the second coupling section extends inside a hollow bore of the second fluid conduit and a second end of the second coupling section is located outside the hollow bore of the second fluid conduit , characterised in that the or each first end , extending inside the hollow bore of the respective fluid conduit , has a tapered bore profile that tapers in a direction towards the corresponding second end . first and second fluid conduits ; a coupling including first and second coupling sections , each coupling section defining a respective hollow bore along which flowable material may flow, the first coupling section in fluid connection with the first fluid conduit , the second coupling section in fluid connection with the second fluid conduit , the coupling sections configured to be releasably coupled to each other; and at least one shut-off valve located within the hollow bore of at least one of the coupling sections , the or each shut-off valve including a valve member movable between a valve open position and a valve closed position in which the valve member shuts off the flow of a flowable material through the hollow bore, the or each valve member configured to move to its valve closed position on separation of the coupling sections , wherein the first coupling section is connected to the first fluid conduit so that a first end of the first coupling section extends inside a hollow bore of the first fluid conduit and a second end of the first coupling section is located outside the hollow bore of the first fluid conduit , and/or wherein the second coupling section is connected to the second fluid conduit so that a first end of the second coupling section extends inside a hollow bore of the second fluid conduit and a second end of the second coupling section is located outside the hollow bore of the second fluid conduit , characterised in that the or each first end , extending inside the hollow bore of the respective fluid conduit , has a tapered bore profile that tapers in a direction towards the corresponding second end . <EOS>