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Blog & Insights

Engineering guides on liquid storage and process heating.

17 Jun 2026 • SAGOSI Engineering Team

Why HDG Bolts Beat GI Bolts in Bolted Panel Liner Tanks: A Specification That Defines Tank Life

The bolt-and-nut specification is one of the smallest line items on a bolted tank quotation — and one of the largest determinants of how long the tank actually lasts. This guide explains why Hot-Dip Galvanised (HDG) bolts substantially outperform Galvanised Iron (GI) bolts, and why bolt integrity is the foundation of a bolted panel liner tank.

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