| 摘要 |
PCT No. PCT/GB96/01129 Sec. 371 Date Oct. 30, 1997 Sec. 102(e) Date Oct. 30, 1997 PCT Filed May 13, 1996 PCT Pub. No. WO96/36831 PCT Pub. Date Nov. 21, 1996An annular bulkhead for separating the inner and outer generally coaxial pipes of a double walled pipe structure wherein the bulkhead is in the form of an annular resilient member dimensioned to fit, in use, the annular space between the pipes, wherein the annular resilient member is supported on each axial side thereof by means of at least partial annular rigid rings divided into separate segments and secured together through the resilient annular member. |
