Rubber Lining for Hydrochloric Acid Tanks: What to Specify

Choose rubber lining for hydrochloric acid tanks from the complete service conditions, then ask the supplier to confirm a named compound and its installation system. The description 'acid-resistant rubber' alone is not an adequate purchasing specification. Temperature limits, thickness and commissioning conditions need confirmation for the actual project.

Start with the operating conditions

Prepare the acid concentration or range, normal and maximum temperature, tank substrate, approximate lining area and drawings. Identify whether the lining will contact liquid, vapour or both. Mention cleaning chemicals, operating pressure or vacuum, and whether the project is a new tank or a repair. Mark unknown information for clarification rather than inventing a value.

Compare specific compounds, not only rubber names

Blair Rubber documents natural rubber formulations for hydrochloric acid tank service. A blanket statement that natural rubber is unsuitable for this application would therefore be misleading. Its recommendations also distinguish liquid and vapour exposure.

REMA TIP TOP describes a hydrochloric-acid tank lining based on chlorobutyl/PVC. This is a specific formulation: ordinary butyl rubber, chlorobutyl rubber and a chlorobutyl/PVC system must not be treated as interchangeable products. Ask each supplier for the proposed compound, current data sheet and written suitability confirmation. Neither example establishes that one material is best for every tank.

Define the supply and installation scope

State whether you need lining sheets only, sheets with compatible primers and adhesives, or a complete installation service. Ask the supplier to describe substrate preparation, bonding materials, seams, repairs and the selected curing approach. Pre-vulcanised describes the rubber's state before installation; confirm the completed system's commissioning requirements in the current application instructions.

Request a project-specific thickness recommendation

If the drawing specifies a thickness, include it. Otherwise ask the supplier to recommend and justify a thickness for the stated conditions. Compare the full proposal rather than accepting a universal thickness or assuming that a thicker sheet automatically solves an unsuitable material selection.

Make quotations comparable

Send the same operating brief and drawings to each supplier. Request the compound designation, recommended thickness, material quantity, material and installation prices separately, taxes, freight, lead time, inspection scope, exclusions and quotation validity. For repair work, ask what happens if the existing lining or substrate requires more preparation than anticipated.

Agree acceptance and handover documents

Ask for an inspection plan appropriate to the selected lining system, the treatment of seams and repairs, and the records to be supplied at handover. Inspection settings, including any spark-test voltage, must follow the chosen system and qualified procedure. This guide does not prescribe a universal test setting or guarantee service life.

Request a lining recommendation

Send the medium, concentration, temperatures, substrate, area, drawings and required service scope. If some information is unavailable, explain what is known so the remaining specification can be clarified before the quotation is finalised.

Sources consulted

Blair Rubber: https://blairrubber.com/hydrochloric-acid-tank-linings/

REMA TIP TOP product information: https://surfaceprotection.rema-tiptop.com/fileadmin/data/common/downloads/safety/pdb/PDB/020-220_TB_CHEMOLINE-70-CN_Revision_2.02_16.09.2024.pdf

REMA TIP TOP installation overview: https://surfaceprotection.rema-tiptop.com/rubber-lining/on-site-rubber-lining/