A fluid fitting installation system includes a first handle and a second handle movably coupled to the first handle. The second handle is movable between a first position and a second position. The fluid fitting installation system includes a grasping member coupled to the second handle. The grasping member is configured to be coupled to a first fluid fitting. A movement of the second handle from the first position to the second position is configured to couple the first fluid fitting to a second fluid fitting.

A flange fixing structure is provided that fixes flange parts respectively provided to two pipe conduits by means of a fixture in a butting manner via a gasket. In this flange fixing structure, when an effective length of the fixture is denoted by L.sub.0, a linear expansion coefficient of the fixture is denoted by .sub.0, thicknesses of n (where n is an integer of 1 or more) members held by the fixture are respectively denoted by t.sub.1 to t.sub.n, and linear expansion coefficients of the n members are respectively denoted by .sub.1 to .sub.n, a product L.sub.0.sub.0 of the effective length L.sub.0 of the fixture and the linear expansion coefficient .sub.0 of the fixture is substantially equal to a sum t.sub.i.sub.i (i=1 to n) of products of the respective thicknesses t.sub.1 to t.sub.n and the respective linear expansion coefficients .sub.1 to .sub.n.

A flange fixing structure is provided that fixes flange parts respectively provided to two pipe conduits by means of a fixture in a butting manner via a gasket. In this flange fixing structure, when an effective length of the fixture is denoted by L.sub.0, a linear expansion coefficient of the fixture is denoted by .sub.0, thicknesses of n (where n is an integer of 1 or more) members held by the fixture are respectively denoted by t.sub.1 to t.sub.n, and linear expansion coefficients of the n members are respectively denoted by .sub.1 to .sub.n, a product L.sub.0.sub.0 of the effective length L.sub.0 of the fixture and the linear expansion coefficient .sub.0 of the fixture is substantially equal to a sum t.sub.i.sub.i (i=1 to n) of products of the respective thicknesses t.sub.1 to t.sub.n and the respective linear expansion coefficients .sub.1 to .sub.n.

A fluid conduit may be provided comprising a ceramic matrix composite (CMC) cross-over tube and a flange. The CMC cross-over tube may comprise a first end configured to extend into a first combustor liner of a gas turbine engine, and a second end configured to extend into a second combustor liner of a gas turbine engine. The interior of the CMC cross-over tube may define a passageway. The flange may extend outwardly from an outer surface of the CMC cross-over tube. The flange may be configured to engage at least one of the first combustor liner and the second combustor liner.