How Helium Is Shipped: ISO Containers, the 45-Day Clock and the Hormuz Problem

How is helium transported?

Most bulk helium crosses oceans as a liquid at about minus 269°C, the coldest liquid in industrial use. It travels in specialised ISO containers, vacuum-insulated tanks built to standard shipping-container dimensions, so they can move by ship, truck and rail. The liquid is far denser than the gas: one litre of liquid helium becomes about 754 litres of gas ^[1].

These containers are scarce and expensive. FPX, citing Scientific American, puts the global fleet at about 2,000 cryogenic ISO containers, each costing around $1 million ^[2]. Santiago & Company gives a lower estimate of about 500–700 for the specialised helium fleet ^[3]. Either way, it is a small fleet for a global market. Qatar's Helium 1 plant alone fills more than 500 containers a year, according to QatarEnergy LNG ^[4].

What is the helium "clock"?

Liquid helium cannot be stored for long. Even the best containers let some of it warm and evaporate. Wessington Cryogenics says ISO containers can hold liquid helium for about 35–48 days before boil-off makes it unusable ^[1]. FPX, citing Reuters, says liquid helium generally needs to reach end users within about 45 days ^[2].

That clock shapes the whole business. A normal voyage from the Persian Gulf to South Korea takes about a month ^[2], which leaves little margin for delays. Customers also cannot stockpile much: Tom's Hardware reported that chipmakers can store only about six weeks of supply before it begins to warm ^[5], and analysts quoted by Value Chain Asia said the global helium chain runs on roughly 45 days of liquid inventory ^[6].

Smaller vessels lose helium faster. Wessington's figures show a 30-litre laboratory dewar losing about 2.8% a day, against 0.2% a day for a 20,000-litre bulk tank ^[1].

Why did the Hormuz crisis hit helium logistics so hard?

Because Qatari helium has only one sea route. The International Union of Marine Insurance (IUMI) notes that the Strait of Hormuz is the only export route for Qatari helium ^[7]. When Ras Laffan stopped on 2 March 2026, Iran also declared the strait closed to US- and Israeli-linked shipping, allowing limited passage for some neutral vessels ^[2].

Containers were caught on the wrong side. About 200 cryogenic containers were stranded near the strait when the conflict began ^[5]. Some were full and losing product to boil-off; others were empty and unable to return to Qatar for refilling. Tom's Hardware reported that repositioning, refilling and delivering those containers could take months ^[5].

The risk continues. On 7–8 November, both Iran and the United States reported ships hit in or near the strait, and Reuters said it could not confirm the reported strikes ^[8]. For bulk cargoes, hull war-risk insurance has risen to roughly 7.5–10% of vessel value per transit, against about 0.25% before the conflict ^[9].

Why do deliveries lag behind a restart?

Because the containers must catch up. Helium consultant Phil Kornbluth advises adding at least two months for logistics to normalise after any production shutdown, according to Santiago & Company ^[3]. The sequence is slow: empty containers must return to the plant, be cooled and filled, sail, clear customs and reach distribution centres, all within the boil-off window.

Qatar has tried alternatives. In early August, AKAP Energy reported that Qatar had restarted helium production at Helium 2 and was shipping via Jeddah, on Saudi Arabia's Red Sea coast ^[10]. Overland routes have precedents in other Gulf products: in May, SABIC trucked about 25,000 tonnes of urea some 1,200 km from Jubail to Yanbu to avoid the strait ^[11]. But overland transport of cryogenic containers adds time, and every extra day consumes part of the holding window.

What does this mean for helium buyers?

Logistics, not only production, will decide how fast the shortage eases. Energy News Beat expects full normalisation of logistics and repaired capacity to take months to years ^[12]. Buyers with access to supply that does not cross Hormuz, such as US production, have an advantage. Those relying on Qatar should expect deliveries to recover in steps, not all at once.

Our related analysis explains how much helium Qatar produces and what has restarted. For all our coverage, see the helium topic page.

Questions people ask about shipping helium

How long can liquid helium be stored in a container?

About 35–48 days in an ISO container before boil-off makes it unusable ^[1]. Smaller dewars lose helium faster, from about 0.2% a day in large tanks to 2.8% a day in 30-litre dewars ^[1].

How many helium containers are there in the world?

Estimates vary. FPX, citing Scientific American, puts the fleet at about 2,000 cryogenic ISO containers ^[2], while Santiago & Company estimates 500–700 specialised helium containers ^[3].

Can Qatar export helium without the Strait of Hormuz?

Only in small amounts. IUMI describes Hormuz as Qatar's only sea export route for helium ^[7]. AKAP Energy reported shipments via Jeddah from August ^[10], but overland moves add time to a product that boils away.

What to watch

• Container movements through Hormuz, the main constraint on Qatari deliveries ^[5,7].
• War-risk insurance costs for Gulf transits ^[9].
• Red Sea alternatives via Saudi ports ^[10,11].
• US–Iran talks, which would decide whether normal shipping can return ^[8].

Alupetra follows Gulf shipping, LNG and helium from Istanbul, London and Dubai; Alupetra does not deal with sanctioned parties.