HS Code Heading

Containers for compressed or liquefied gas, of iron or steel

73.11 Heading
Section XV — Base metals and articles of base metal

About HS Code 7311

Heading 7311 is specifically dedicated to containers for compressed or liquefied gas, of iron or steel. This classification encompasses a range of specialized vessels designed to safely hold gases under high pressure or in liquefied form, including industrial gas cylinders, medical gas tanks, propane tanks, and CNG (Compressed Natural Gas) cylinders. The crucial aspects for classification are the material (iron or steel) and the explicit design for containing compressed or liquefied gas. This distinguishes them from general liquid or solid storage tanks (7309, 7310). The scope includes both empty and filled containers, as long as their primary design is for gas. Sub-categories often relate to the specific gas they are designed for, their pressure rating, and construction method (e.g., seamless, welded). This classification is critically important for trade compliance due to the inherent safety risks associated with high-pressure gas. Importers and exporters must adhere to stringent national and international safety standards (e.g., DOT, ISO, ADR), testing requirements, and marking regulations, which significantly impact market access and liability. Historically, the demand for these containers has grown with industrialization, healthcare advancements, and the use of alternative fuels. As part of Chapter 73, it underscores the specialized application of iron and steel in safety-critical containment solutions.

Products Under This Code

Industrial oxygen cylinders, acetylene gas cylinders, nitrogen gas cylinders, carbon dioxide cylinders, propane tanks (LPG), butane gas cylinders, CNG (Compressed Natural Gas) tanks for vehicles, medical gas cylinders (e.g., for nitrous oxide), diving cylinders (scuba tanks), fire extinguisher cylinders (empty), refrigerant gas cylinders, helium gas cylinders, hydrogen gas cylinders, cryogenic gas cylinders (steel), ammonia gas cylinders, chlorine gas cylinders, specialty gas cylinders, calibration gas cylinders, automotive LPG tanks, small disposable gas cartridges (steel, for lighters/camping stoves), gas storage spheres (steel, for bulk gas), welding gas cylinders, air brake tanks (for vehicles).

Real World Examples

A medical supply company in the UK imports empty oxygen cylinders from India for distribution to hospitals and clinics, ensuring compliance with strict medical device and pressure vessel regulations, with shipments typically traveling from Mumbai to Felixstowe. In another scenario, a US industrial gas supplier imports large steel propane tanks from China for its distribution network, requiring adherence to Department of Transportation (DOT) standards for safe transport and storage, often via ocean freight from Shanghai to Long Beach. Furthermore, a German automotive manufacturer imports CNG fuel tanks from Italy for integration into its vehicle production lines, with components moving by truck or rail from Milan to Bremerhaven.

Common Misclassification

The primary misclassification error is confusing these gas containers (7311) with general-purpose liquid or solid storage tanks (7309, 7310). The key is the design for *compressed or liquefied gas* – a steel drum (7310) is not a gas cylinder. Even if empty, if it's designed for gas, it's 7311. Another mistake is classifying gas containers made of other materials, such as aluminum (7613), under this heading. Additionally, pressure vessels that are integral, non-separable parts of machinery (e.g., an air reservoir built into a braking system classified under 8708) might be incorrectly classified as standalone gas containers.

Subheadings 1

7311.00 Containers for compressed or liquefied gas, of iron or steel

EU Regulatory Requirements

This product falls under the Carbon Border Adjustment Mechanism (CBAM). Importers to the EU must declare embedded carbon emissions and purchase CBAM certificates.

Related Codes

73.01 Iron or steel sheet piling, whether or not drilled, punched or made from assembled elements; welded angles, shapes and sections, of iron or steel 73.02 Railway or tramway track constructions of iron or steel; rails, check and track rails, switch blades, crossing frogs, point rods, sleepers, fish-plates, chair wedges, sole plates, bedplates, ties and the like 73.03 Tubes, pipes and hollow profiles, of cast iron 73.04 Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel 73.05 Iron or steel (excluding cast iron); tubes and pipes (e.g. welded, riveted or similarly closed), having circular cross-sections, external diameter of which exceeds 406.4mm, not seamless 73.06 Iron or steel (excluding cast iron); tubes, pipes and hollow profiles (not seamless), n.e.c. in chapter 73 73.07 Tube or pipe fittings (e.g. couplings, elbows, sleeves), of iron or steel 73.08 Structures of iron or steel and parts thereof; plates, rods, angles, shapes, sections, tubes and the like, prepared for use in structures 73.09 Reservoirs, tanks, vats and similar containers; for any material (excluding compressed or liquefied gas), of iron or steel, capacity exceeding 300l, whether or not lined or heat insulated 73.10 Tanks, casks, drums, cans, boxes and similar containers, for any material (excluding compressed or liquefied gas), of iron or steel, capacity not exceeding 300l, whether or not lined or heat-insulated

Industry

This code belongs to the Automotive & Vehicles industry.

Trade Overview

China, India, the United States, Germany, Italy, and Japan are leading manufacturers and consumers of iron and steel gas containers. Trade in these items is highly regulated globally due to significant safety concerns, with international standards (e.g., ISO, UN, DOT) playing a critical role in market access. Tariffs can vary, but the overriding factor is compliance with safety certifications. Anti-dumping duties may apply to certain cylinder types from specific countries. Demand is closely tied to industrial activity, healthcare infrastructure, and the adoption of alternative energy sources, making trade agreements influential in cost and market dynamics.

Frequently Asked Questions

What is HS code 7311?

HS code 7311 is a 4-digit heading in the Harmonized System that covers: Containers for compressed or liquefied gas, of iron or steel. Heading 7311 is specifically dedicated to containers for compressed or liquefied gas, of iron or steel. This classification encompasses a range of specialized vessels designed to safely hold gases under high pressure or in liquefied form, including industrial gas cylinders, medical gas tanks, propane tanks, and CNG (Compressed Natural Gas) cylinders. The crucial aspects for classification are the material (iron or steel) and the explicit design for containing compressed or liquefied gas. This distinguishes them from general liquid or solid storage tanks (7309, 7310). The scope includes both empty and filled containers, as long as their primary design is for gas. Sub-categories often relate to the specific gas they are designed for, their pressure rating, and construction method (e.g., seamless, welded). This classification is critically important for trade compliance due to the inherent safety risks associated with high-pressure gas. Importers and exporters must adhere to stringent national and international safety standards (e.g., DOT, ISO, ADR), testing requirements, and marking regulations, which significantly impact market access and liability. Historically, the demand for these containers has grown with industrialization, healthcare advancements, and the use of alternative fuels. As part of Chapter 73, it underscores the specialized application of iron and steel in safety-critical containment solutions.

What products fall under HS code 7311?

Industrial oxygen cylinders, acetylene gas cylinders, nitrogen gas cylinders, carbon dioxide cylinders, propane tanks (LPG), butane gas cylinders, CNG (Compressed Natural Gas) tanks for vehicles, medical gas cylinders (e.g., for nitrous oxide), diving cylinders (scuba tanks), fire extinguisher cylinders (empty), refrigerant gas cylinders, helium gas cylinders, hydrogen gas cylinders, cryogenic gas cylinders (steel), ammonia gas cylinders, chlorine gas cylinders, specialty gas cylinders, calibration gas cylinders, automotive LPG tanks, small disposable gas cartridges (steel, for lighters/camping stoves), gas storage spheres (steel, for bulk gas), welding gas cylinders, air brake tanks (for vehicles).

What are common misclassifications for HS code 7311?

The primary misclassification error is confusing these gas containers (7311) with general-purpose liquid or solid storage tanks (7309, 7310). The key is the design for *compressed or liquefied gas* – a steel drum (7310) is not a gas cylinder. Even if empty, if it's designed for gas, it's 7311. Another mistake is classifying gas containers made of other materials, such as aluminum (7613), under this heading. Additionally, pressure vessels that are integral, non-separable parts of machinery (e.g., an air reservoir built into a braking system classified under 8708) might be incorrectly classified as standalone gas containers.

Which countries trade the most under HS code 7311?

China, India, the United States, Germany, Italy, and Japan are leading manufacturers and consumers of iron and steel gas containers. Trade in these items is highly regulated globally due to significant safety concerns, with international standards (e.g., ISO, UN, DOT) playing a critical role in market access. Tariffs can vary, but the overriding factor is compliance with safety certifications. Anti-dumping duties may apply to certain cylinder types from specific countries. Demand is closely tied to industrial activity, healthcare infrastructure, and the adoption of alternative energy sources, making trade agreements influential in cost and market dynamics.

How is HS code 7311 structured?

HS code 7311 is a 4-digit heading under Chapter 73 of the Harmonized System. The first 2 digits (73) identify the chapter, and digits 3-4 (11) specify the heading. This code contains multiple 6-digit subheadings for precise product classification.