## Common ground
All options describe liquefied petroleum gas (LPG) cylinders made from different metallic or plastic materials.
## Options at a glance
**3925.10 – Plastic material**
- **Defining trait:** Made from synthetic polymer, not metal; typically lightweight and non-corrosive.
- **Typical examples:** Small portable LPG bottles for camping stoves.
- **Best fit when:** The cylinder is non-metallic, flexible or molded plastic, often used for temporary or low-pressure applications.
**7311.00 – Iron or steel**
- **Defining trait:** Made from ferrous metal; most common material for standard LPG cylinders due to strength and durability.
- **Typical examples:** 15 kg household LPG cylinders, industrial gas containers.
- **Best fit when:** The cylinder is heavy, rigid, and made of steel or iron with welded seams.
**7419 – Copper**
- **Defining trait:** Made from copper; rare for full cylinders due to cost and low strength. May be used in fittings or valves.
- **Typical examples:** Copper-lined valve components or connectors (not full cylinder bodies).
- **Best fit when:** The product is a copper-based component, not the main cylinder body.
**7508.90 – Nickel**
- **Defining trait:** High corrosion resistance; used in specialized environments, not standard LPG cylinders.
- **Typical examples:** High-end valves or internal linings in harsh chemical environments.
- **Best fit when:** The cylinder has nickel plating or is designed for extreme conditions.
**7613.00 – Aluminium**
- **Defining trait:** Lightweight, corrosion-resistant; used in portable or high-mobility LPG cylinders.
- **Typical examples:** Travel-sized camping gas canisters, refillable outdoor cookers.
- **Best fit when:** The cylinder is light, non-rusting, and designed for portability.
**7806.00 – Lead**
- **Defining trait:** Soft, heavy metal; not used in LPG cylinders due to toxicity and poor mechanical strength.
- **Typical examples:** None — lead is unsuitable for gas storage.
- **Best fit when:** None — this option is not realistic for functional LPG cylinders.
**7907.00 – Zinc**
- **Defining trait:** Used in coatings or galvanization, not as a primary cylinder material.
- **Typical examples:** Galvanized steel cylinders (zinc coating), not pure zinc cylinders.
- **Best fit when:** The cylinder has a zinc-based protective layer.
**8007.00 – Tin**
- **Defining trait:** Used in coatings or thin layers; not suitable for pressure vessels.
- **Typical examples:** Tin-plated steel containers (e.g., food cans), not LPG cylinders.
- **Best fit when:** The cylinder is tin-coated, but not made of pure tin.
**8101.99 – Tungsten**
- **Defining trait:** Extremely dense and strong; used in high-temperature applications, not for gas storage.
- **Typical examples:** Filaments, cutting tools — not LPG cylinders.
- **Best fit when:** None — not suitable for standard LPG cylinder construction.
**8104 – Magnesium**
- **Defining trait:** Lightweight but flammable; unsafe for pressurized gas storage.
- **Typical examples:** Aerospace components, not gas cylinders.
- **Best fit when:** None — magnesium is too reactive and dangerous for LPG use.
## Key differences
| HS Code | Material | Strength | Weight | Corrosion Resistance | Common Use in LPG |
|--------|----------------|----------|----------|------------------------|--------------------|
| 3925.10 | Plastic | Low | Very light | Moderate | Portable, low-pressure |
| 7311.00 | Steel | High | Heavy | Low (unless coated) | Standard household/industrial |
| 7613.00 | Aluminium | Medium | Light | High | Portable, outdoor use |
| Others | Rare metals | Varies | Varies | Varies | Not standard; mostly components |
## How to choose
- Is the cylinder made of plastic? → 3925.10
- Is it steel or iron, heavy and rigid? → 7311.00
- Is it lightweight aluminum, used for camping? → 7613.00
- Does it have a metal coating (e.g., galvanized)? → Check if base is steel (7311.00)
- Is it made of copper, nickel, lead, zinc, tin, tungsten, or magnesium? → Not standard; likely not a full cylinder.
## Overlaps & pitfalls
- **Overlaps:** Zinc and tin are often used as coatings on steel cylinders (e.g., galvanized), so they may appear in the same product.
- **Pitfalls:** Many options (e.g., lead, magnesium, tungsten) are unrealistic for LPG cylinders due to safety or material properties. If a product is labeled "copper" or "nickel," it likely refers to fittings, not the full cylinder body.
- **Priority:** Choose based on the **primary material of the cylinder body**, not coatings or components