By Ahmad Ghaddar, Enes Tunagur and Robert Harvey
LONDON, Sept 1 (Reuters) - For the first time on record, Iran has gone about seven weeks without shipping meaningful crude exports through the Strait of Hormuz, as a U.S. naval blockade succeeds where years of sanctions failed by cutting off one of Tehran's main sources of foreign-currency earnings.
Unlike previous sanctions campaigns, when Iranian crude continued reaching buyers despite restrictions, the current blockade has stopped fresh crude cargoes reaching China, Tehran's only major remaining oil customer, increasing pressure on government finances and foreign-currency reserves.
Since the U.S. reinstated its blockade on Iran on July 14 as part of their six-month conflict, no Iranian crude cargoes have successfully transited the Strait of Hormuz to China, according to Kpler, Vortexa and TankerTrackers.com.
As a result, Iran can only sell crude to China from floating storage in Asia, which it cannot replenish as crude accumulates aboard tankers inside the strait.
"Even at the height of maximum-pressure sanctions in 2019-20, some Iranian crude cleared Hormuz every single month; at no point did outbound flows fall to near-zero for a sustained stretch as they have since mid-July," Vortexa analyst Claire Jungman said.
Iran loaded about 220,000 to 255,000 barrels per day of crude oil and condensate in August, according to Vortexa and Kpler estimates, down from roughly 740,000 bpd in July and about 2 million bpd in March.
The collapse in exports is draining one of Iran's main sources of foreign-currency income and could force Tehran to finance spending by printing money, risking even higher inflation, Kpler analyst Homayoun Falakshahi said.
The International Monetary Fund estimates Iran's inflation rate at nearly 70% this year, the world's third-highest after Venezuela and Sudan.
Last week, Washington sought to increase the pressure by threatening countries that continue trading with Tehran, while stopping short of immediately imposing penalties.
IRAN WAR TIMELINE
War starts Feb 28
US issues 1-month waiver allowing Mar 20
Iranian oil exports
US announces blockade on Iran-linked Apr 13
shipping
Waiver expires Apr 19
US and Iran sign 60-day MoU, Jun 18
blockade is suspended
US reimposes blockade Jul 14
MoU negotiation period expires (no circa Aug
official announcement) 18
Six months of war Aug 28
THE BLOCKADE AND BEYOND
Iran currently has 29 tankers inside the strait carrying 36.11 million barrels of crude, TankerTrackers.com co-founder Samir Madani said.
The U.S. blockade does not extend along Iran's entire coastline. It sits farther south, between the Gulf of Oman and the Arabian Sea, where U.S. Navy vessels vet ships departing from and approaching Iranian ports.
Beyond the blockade zone, dozens of Iran-linked shadow-fleet tankers remain active, with 51 vessels operating in the Gulf of Oman and another 81 making deliveries in Asia or waiting off Malaysia, according to David Tannenbaum of Blackstone Compliance Services.
Reuters could not independently verify those figures.
IRANIAN CRUDE STILL FOR SALE, BUT FOR HOW LONG?
Iranian crude remains openly available, with cargoes for September and October delivery to China being offered, traders said.
They said available volumes are lower than for July and August because floating storage outside the Gulf is shrinking as no fresh supply arrives.
Iranian crude in floating storage west of the blockade line rose to 41.7 million barrels by August 26 from 35.5 million at the end of July, while total Iranian crude afloat fell to 107 million barrels from 135 million, according to Vortexa data.
"China can grab whatever's floating around in their neck of the woods, but that's about it for now, really," TankerTrackers co-founder Samir Madani said.
Once sold, empty tankers cannot return to Iranian ports because of the blockade, leaving vessels idle offshore.
Vortexa's Jungman said 27 sanctioned tankers linked to Iran's oil trade are currently waiting off Sri Lanka in ballast, unable to return to Iran.
(Reporting by Ahmad Ghaddar, Enes Tunagur and Robert Harvey. Additional reporting by Siyi Liu and Chen Aizhu in Singapore. Editing by Mark Potter)
