Rubber Lining Thickness: Write a Clear Purchase Specification

Rubber lining thickness should be agreed for a named compound, service conditions and installation system. A thicker sheet does not establish chemical suitability or solve every installation problem. The purchasing task is to make the proposed construction and its acceptance requirements clear.

Ask for the basis of the proposal

Send the medium, concentration, operating temperatures, pressure or vacuum, solids and mechanical duty with the tank drawings. If a drawing already specifies thickness, identify the requirement and ask the supplier to confirm it for the proposed system.

When thickness has not been specified, request a written recommendation and its basis. Ask whether different zones need different treatment, and why. Do not turn a supplier's recommendation for another project into a general requirement for your equipment.

Describe the complete construction

Clarify whether the proposal uses a single sheet or a layered assembly, and how the stated thickness relates to that construction. Identify local details such as corners, nozzles, seams and repair areas on the drawing.

Ask the supplier to explain overlap and detail arrangements. Local build-up at a seam should not be confused with the specified construction over the main surface. Any change to layers or material should be reviewed as a system change, not treated only as an increase in thickness.

Agree how compliance is checked

Request the permitted tolerance, measurement method and inspection stage for the chosen system. Confirm which records will show incoming material checks and completed lining acceptance. Agree how areas outside the specification will be assessed and corrected.

Compare quotations using the same approved construction and inspection scope. Keep the compound designation, thickness requirements, local details and acceptance procedure together in the purchase documents so the order describes more than a nominal sheet value.