Ceramic structured packing procurement should define tower dimensions, element geometry, ceramic material requirements, manway access, packaging, spare quantity, and documentation before production approval.

Plastic structured packing RFQs should include polymer requirements, operating conditions, tower dimensions, access limitations, support scope, and packaging needs before a firm fabrication quotation is accepted.

Metal structured packing moves from budgetary to fabrication-ready procurement only after tower ID, bed height, element arrangement, manway access, material construction, sectional design, and scope are defined.

Ceramic random packing RFQs should define dimensional basis, weight-to-volume relationship, chemical resistance requirements, test documentation, breakage criteria, and packaging before supplier prices are compared.

Plastic random packing RFQs should clarify resin requirements, chemical and temperature conditions, quantity basis, product geometry, and packaging. If these remain open, the quotation should be treated as budgetary rather than fully purchase-ready.