GS Caltex
The Yeosu Complex covers about 6 million square metres, with a mixed feed cracker completed in November 2022 producing 900,000 tonnes of ethylene a year.
Yeosu · IECEx
IECEx Mobile Phone Distributor in Yeosu
Yeosu is a south coast city of about 269,000 people hosting a major refining and petrochemical complex. GS Caltex's Yeosu Complex and Lotte Chemical's Yeosu plant create large Zone 1 and Zone 2 areas. Distribution partners for Yeosu are being identified ahead of the Q4 2026 launch of the IS-04Z1.
Pre-launch · certification in progress · Launching Q4 2026
Marking targetEx ib IIC T4Intrinsic safety, Zone 1 / 21 design target · certification in progress
AvailabilityQ4 2026via authorised distributors
Search topicIECEx
DeviceMobile Phone
RouteDistribution
WhereYeosu
Short answer. Yeosu has no appointed SAMS distributor yet: the IS-04Z1 is pre-launch (certification in progress, no certificate issued, launch planned for Q4 2026), and distributor applications are open.
For the record, no certificate exists for the IS-04Z1 today. The programme is under way ahead of a Q4 2026 launch. Operator approval runs on its own timeline. Certification status. Place facts reviewed October 2026.
At a glance · IECEx
Checklist: IECEx mobile phone for Yeosu
| Check | What to look for | IS-04Z1 today |
|---|---|---|
| Certificate of conformity | Number checkable on the IECEx online register | In progress; not issued |
| Standards edition | The IEC 60079 edition the certificate cites | Stated on the certificate when issued |
| Schedule of conditions | Limits of use, batteries and accessories | Published with the certificate |
| Where it applies | Yeosu: Chemical storage tank farms, Marine loading jetties, Refinery process units | Classified by the site operator |
Product · Yeosu
The product behind this search: the SAMS IS-04Z1.
SAMS IS-04Z1
An intrinsically safe Android smartphone designed for Zone 1 and Zone 21 hazardous areas in Yeosu. It is pre-launch: IECEx, ATEX and NEC 500 certification is in progress ahead of the Q4 2026 launch.
- IP68 sealed
- 4,000 mAh battery
- 50 MP camera
- Android 16
- Zone 1 / Zone 21 design target
The site · Yeosu
Yeosu at a glance: who is there, what is classified
A short profile of the site and the kinds of classified area that matter for portable equipment.
Operators and companies on site
- GS Caltex
- Lotte Chemical
Classified areas to expect
- Refinery process units
- Ethylene cracker and polymer plants
- Chemical storage tank farms
- Marine loading jetties
Local conditions · Yeosu
Conditions in Yeosu that affect handheld equipment
Restructuring
Korea approved a restructuring plan in July 2026 involving Lotte Chemical's Yeosu operations and the Yeochun NCC integration.
Field notes · Yeosu
More about Yeosu that matters for portable equipment
Yeosu: projects and investment
In November 2022 the company completed a 2.7 trillion won mixed feed cracker near the Yeosu No. 2 Complex, with annual capacity of 900,000 tonnes of ethylene and 500,000 tonnes of polyethylene.
Yeosu: logistics and access
The company imports around 80 types of crude from about 30 countries and exported to 57 countries in 2022, so tanker and product shipping through the Yeosu coast is continuous.
Yeosu: infrastructure
The aromatics business started in 1990, with annual capacity of 3.0 million tonnes of aromatics and 180,000 tonnes of polypropylene, so benzene-type vapour hazards exist alongside fuel and olefin units.
Yeosu: industry on the ground
GS Caltex has a refining capacity of about 800,000 barrels per stream day, and it operates Korea's largest heavy oil upgrading facility at 275,000 barrels a day, cracking heavy residues into lighter fuels.
The term · IECEx
What “IECEx” means for a smartphone
IECEx is the international scheme for certifying equipment used in explosive atmospheres. A certificate of conformity is issued by an accredited certification body against a specific edition of the IEC 60079 standards and carries a schedule of conditions of safe use. It is not a legal requirement in most countries on its own, but many national schemes accept it as the technical basis.
The IECEx certificate for the IS-04Z1 is in progress and has not been issued. The marking target is Ex ib IIC T4, the intrinsic safety concept for Zone 1 gas with the hardest gas group (IIC) and a 135 °C temperature class.
In Yeosu. Yeosu's complex relies on overseas technology licensors and specialist contractors for large projects. IECEx gives them a single certificate of conformity and schedule of conditions to review. The IS-04Z1 has neither document yet, since certification is in progress, so only the planned route can be discussed.
The route · distribution
Distributing the IS-04Z1 in Yeosu
A distributor for Yeosu would carry the IS-04Z1 after certification completes; the Q4 2026 launch is the planning date and no appointment has been made. SAMS reviews applicants one by one and prefers companies with their own Ex-competent technical and service staff, since certified devices must not be repaired outside approved channels.
What SAMS looks for in a partner
- Operator relationships
- Existing supplier registrations or a clear route to them with the main operators and contractors in Yeosu.
- Ex-competent staff
- People who understand zone classification, markings and the conditions of a certificate.
And equally important
- Local-language support
- Documentation, training and helpdesk in the languages the workforce uses.
- Service capability
- Spares, battery replacement and repair routed through SAMS-approved channels.
Questions · Yeosu
Frequently asked questions
Can we buy an IECEx mobile phone in Yeosu today?
Not today. Until the certificates are issued the IS-04Z1 stays out of classified areas, and until launch there is nothing to purchase. You can ask for the datasheet and the certification schedule, or book a safe-area evaluation unit.
What does an IECEx mobile phone in Yeosu cost?
There is no list price yet. SAMS gives indicative pre-launch pricing in writing, against a stated quantity and site, and does not commit to a lead time before certification completes.
Does the IS-04Z1 hold an IECEx certificate?
No. The IECEx certificate is in progress and has not been issued. SAMS will publish the number when it exists.
Which areas at Yeosu would use it?
Likely candidates are refinery process units, ethylene cracker and polymer plants, chemical storage tank farms, marine loading jetties. Which areas are classified, and to what zone, is set by the site operator's own area classification drawings.
How do I become a SAMS distributor for Yeosu?
Apply through the distributor page with your company details and the territory you cover. SAMS reviews applications company by company and has not yet granted a territory for Yeosu.
How do I register as a contractor or supplier at a Yeosu plant?
Large operators such as GS Caltex normally run vendor registration and safety induction processes, with permits for work in classified areas. Confirm the current requirements directly with the plant's procurement and safety departments before mobilising equipment.
Does the Yeosu rainy season affect handheld equipment?
Yes. June to August brings more than 200 mm of rain a month and high humidity, followed by cold winters. Typically devices need good water ingress protection and cleaning routines, and battery performance should be checked in cold weather.
Does heavy summer rain affect devices at Yeosu?
Yeosu has heavy rain from June to August, which affects outdoor rounds and jetty work. The IS-04Z1 is designed to IP68 for dust and water, but that does not give explosion protection. Plan handling and charging in dry, safe areas and check with the operator.
Related guides
Keep exploring
More on Yeosu, and on other places in South Korea.
Hazardous Area Mobile Phone in YeosuSame place, different guide
ATEX and IECEx Mobile Phone Distributor in YeosuSame place, different guide
Explosion-Proof Mobile Phone Distributor in YeosuSame place, different guide
Ex-Proof Mobile Phone in YeosuSame place, different guide
Industrial Mobile Phone Distributor in YeosuSame place, different guide
Intrinsically Safe Mobile Phone Distributor in YeosuSame place, different guide
ATEX and IECEx Mobile Phone Distributor in IncheonElsewhere in South Korea
ATEX and IECEx Mobile Phone Distributor in UlsanElsewhere in South Korea
ATEX and IECEx Mobile Phone Distributor in BusanElsewhere in South Korea
ATEX and IECEx Mobile Phone Distributor in DaesanElsewhere in South Korea
South Korea market guideCertification route and regulators
All guides for South KoreaEvery route we cover
Certification statusWhat is in progress
Enquiry · Yeosu
Ask about the IS-04Z1 for Yeosu, South Korea
Send the site, zone and gas group and roughly how many handsets. We reply by email with the datasheet and the certification schedule.
Enquiry · Yeosu
Launching Q4 2026
Planning for Yeosu?
Send the zone and gas group of your site and we will reply with the datasheet and schedule.