Wire-mesh structured packing should be specified using material, wire size, mesh construction, corrugation geometry, element dimensions, and approved technical data. Packaging should also protect the relatively delicate structure from compression and distortion.

Large structured packing should be segmented according to actual manway access, handling limits, and installation sequence. Segment arrangement, marking, and packaging should be approved before manufacturing.

Structured packing RFQs should define total bed height, element height, layer count, segment arrangement, and installation orientation. Clear marking and layer identification can prevent site installation errors.

Structured packing procurement should define critical corrugation geometry—including height, pitch, angle, and sheet thickness—when these characteristics are necessary to preserve the approved packing design.

A “250Y” designation does not fully define structured packing construction. Procurement documents should control material, geometry, element dimensions, segmentation, orientation, and approved hydraulic characteristics according to whether the project requires exact replacement or technical equivalence.