be attached to the pipe preferably farther upstream of the cone apex 702 by an attachment means the attachment means includes one or more flexible guy straps 703 wires cables chains clamps bisected or sectored ring or rings 704 etc exemplary rings are shown in fig7 a and 7b such attachments means may be held in place by one or more conventional flanges or clamps not shown in one or more embodiments the flexible strainer 700 may be installed in a pipe that is fabricated forged or cast to mount the flexible strainer in one or more embodiments the flexible strainer 700 is held between a fixed circular flange not shown and a solid or segmented removable flange not shown the removable flange or segments can be held by bolts threaded into the fixed flange or by other fasteners or means with some provision for positive retention e g tie wires thread sealant or other means furthermore these fasteners are upstream of the flexible strainer 700 and thus would not be able to migrate downstream if the retention system failed preferably flexible strainer 700 is mounted with debris collection areas 705 which may include vessels access ports valves or drains etc for debris removal preferably the flexible strainer is mounted with one or more access flanges doors or compartments so that it can be serviced and replaced the flexible strainer 700 may be replaced through the access provisions without disturbing any pipework while the present techniques may be susceptible to various modifications and alternative forms the exemplary embodiments discussed above have been shown only by way of example however it should again be understood that the techniques is.