1. Carbon Steel Is Conductive, but Anti‑Static Design Is Not Automatic
- Conductive metal shell can help dissipate static electricity.
- Conductivity alone does not mean the tank has a complete anti‑static design.
- Recycled tanks may have damaged coatings, isolated fittings, missing grounding lugs, or broken bonding connections.
- These deficiencies reduce the ability to discharge static safely.
2. Grounding & Bonding Are the Core Anti‑Static Measures
- Tank body, piping, valves, flanges, and internal metal parts should be electrically continuous and properly grounded.
- Bonding ensures no isolated metal part develops a dangerous potential difference.
- Grounding provides a path for static charge to flow safely to earth.
- Referenced in standards such as NFPA 77 and API RP 2003.
3. Internal Coatings & Linings Must Be Checked Carefully
- Internal lining must not block static dissipation.
- Non‑conductive coatings can allow charge to accumulate on the liquid surface or isolated metal parts.
- Conductive or anti‑static coatings must meet applicable surface resistance requirements.
- Coating condition is especially important; old linings may be cracked or partially insulated.
4. Operation, Inspection & Compliance Remain Essential
- Fill pipes should be positioned to reduce splashing; control flow rate during loading.
- Personnel should use anti‑static clothing and follow grounding procedures.
- Before service, verify grounding points, bonding jumpers, flange continuity, coating condition, and inspection records.
- Confirm compliance against local fire codes, environmental rules, and industry guidance.