dot-cargo-tank-specifications-406-407-412

name	dot-cargo-tank-specifications-406-407-412
description	Use when identifying or specifying cargo tanks. Covers DOT-406 (petroleum), DOT-407 (chemical), DOT-412 (corrosive), MC-330/331 (gas), and the qualification cycle.

Dot Cargo Tank Specifications 406 407 412

Cargo tank specifications are heavily codified. Each tank built to a DOT specification with mandatory features + inspection cycle.

Common specifications

• DOT-406: Petroleum + flammable liquids (gasoline, diesel)
• DOT-407: Chemical materials (toluene, xylene, food-grade)
• DOT-412: Corrosive materials (acids, bases)
• MC-330/MC-331: Liquefied gases (LPG, propane)
• MC-338: Cryogenic gases

Mandatory features

Specifications dictate: tank thickness, material (steel/aluminum/stainless), pressure rating, overpressure relief, emergency shutoff valves, accident-damage protection.

Inspection cycle

• Annual visual external inspection
• 1-5 year hydrostatic test (per spec)
• Initial certification when built
• Re-certification at intervals

Common findings

Lapsed hydrostatic test. Damaged tank not properly repaired/re-certified. Wrong tank for material (DOT-407 for corrosive vs DOT-412).

Where this fits in X3 Compass

Applied in the X3 Compass Hazmat Center add-on.