Overview
Imported gas, primarily LNG and LPG, is a critical energy resource for countries lacking domestic production. It is transported via specialized carriers and stored under high pressure or cryogenic conditions. The global trade of gas has expanded due to its efficiency and lower emissions compared to coal or oil. Key suppliers include Qatar, Australia, and the U.S., with contracts often tied to long-term agreements. Buyers must consider geopolitical factors, logistics, and compliance with international standards such as ISO 13686 for quality specifications.
Physical and Chemical Properties
Imported gas composition varies: LNG is predominantly methane (CH₄), while LPG contains propane (C₃H₈) and butane (C₄H₁₀). Both are odorless in pure form, with odorants like ethanethiol added for leak detection. LNG is stored at -162°C to maintain liquid form, reducing volume by 600x compared to gaseous state. LPG remains liquid under moderate pressure (≈8 bar at 20°C). Energy content ranges from 45–55 MJ/kg, making it suitable for high-demand applications. Critical handling properties include flammability limits (LNG: 5–15% in air) and vapor density heavier than air (LPG).
Main Applications
Industrial sectors consume ≈40% of imported gas, notably for steel, glass, and ceramic production. Power plants use LNG for peak shaving due to rapid combustion response. LPG is widely adopted for cooking and heating in off-grid areas. Emerging applications include marine fuel (IMO 2020 compliance) and hydrogen feedstock. In chemicals, methane serves as a base for ammonia and methanol synthesis. Regional demand varies—Asia prioritizes urban energy supply, while Europe focuses on decarbonization transitions.
Safety and Storage
Gas requires strict safety protocols: storage tanks must meet API 620 (LNG) or ASME standards (LPG). Facilities need gas detectors, pressure relief valves, and explosion-proof electrical systems. LNG terminals employ double-walled insulation to prevent boil-off gas (BOG) leaks. Transport hazards include rollover (stratification in tanks) and cold burns. First responders require specialized training for gas fires, which demand dry chemical suppressants (not water). Regulatory frameworks like NFPA 59A govern facility design.
B2B Procurement Guide
Buyers should evaluate suppliers on: 1) Track record in FOB/DES deliveries, 2) Compliance with ICC gas contract terms, and 3) Flexibility in spot vs. long-term pricing. Price indexing often links to Brent crude or Henry Hub benchmarks. Logistics costs (≈15–30% of landed price) depend on shipping distance and regasification capacity. Inspect certificates of origin and assay reports for sulfur content (<50 ppm for EU standards). Consider Incoterms like CIF for risk allocation.
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