Refining
SK Energy and S-Oil operate refineries in Ulsan; S-Oil's Onsan refinery had about 650,000 barrels per day in 2016.
Ulsan · ATEX and IECEx
ATEX and IECEx Mobile Phone in Ulsan
Ulsan is a south-east coastal industrial city of about 1.1 million people, with refineries, a petrochemical complex and the world's largest shipyard. Process plants, tank farms and shipyard work create extensive Zone 1 and Zone 2 areas. This page explains what to look for in an ATEX and IECEx mobile phone for Ulsan, and where the IS-04Z1 stands against that list today.
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 topicATEX and IECEx
DeviceMobile Phone
RouteSpecification
WhereUlsan
Short answer. The SAMS IS-04Z1 is the intrinsically safe smartphone covered here for Ulsan: pre-launch, designed for Zone 1 and Zone 21 (marking target Ex ib IIC T4), with certification in progress and no certificate issued.
For the record, no certificate exists for the IS-04Z1 today. The programme is under way ahead of a Q4 2026 launch. A buyer's engineering review is separate from the certificate. Certification status. Place facts reviewed October 2026.
At a glance · ATEX and IECEx
Checklist: ATEX and IECEx mobile phone for Ulsan
| Check | What to look for | IS-04Z1 today |
|---|---|---|
| Marking | II 2 G Ex ib IIC T4 on the rating plate | Design target; not yet marked |
| EU-type examination certificate | Notified body number and certificate ID | In progress with TÜV; not issued |
| IECEx certificate of conformity | Number listed on the IECEx online register | In progress; not issued |
| Where it applies | Ulsan: Refinery process units, Petrochemical plants, Tank farms | Classified by the site operator |
Product · Ulsan
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 Ulsan. 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 · Ulsan
Ulsan 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
- SK Energy
- S-Oil
- HD Hyundai Heavy Industries
Classified areas to expect
- Refinery process units
- Petrochemical plants
- Tank farms
- Shipyard tank and cargo-space work
Local conditions · Ulsan
What Ulsan means for portable equipment
Expansion
S-Oil's Shaheen petrochemical project was planned for completion by 2026, bringing commissioning crews.
Field notes · Ulsan
More about Ulsan that matters for portable equipment
Ulsan: projects and investment
S-Oil is scheduled to complete the Shaheen Project, one of the world's largest petrochemical facilities with an investment of nine trillion won, by 2026, adding new process areas in Ulsan.
Ulsan: industry on the ground
Ulsan is described as South Korea's industrial powerhouse, hosting the world's largest automobile assembly plant, the world's largest shipyard and the world's third-largest oil refinery, which is owned by SK Energy.
Ulsan: people and language
Ulsan has more than 1.1 million residents and the highest GDP per capita of any region in South Korea, at about 65,352 dollars in 2020, with a deep pool of industrial technicians.
Ulsan: industry on the ground
The SK Energy refinery has a capacity of 840,000 barrels a day, and a slightly smaller 669,000 barrel a day S-Oil refinery is also in the city, so two very large refineries operate side by side.
The term · ATEX and IECEx
What “ATEX and IECEx” means for a smartphone
ATEX is the European legal framework for equipment used in explosive atmospheres (Directive 2014/34/EU). IECEx is the international certification scheme built on the IEC 60079 standards. Buyers outside Europe often ask for both: an IECEx certificate is the technical evidence most national regimes build on, while ATEX is the legal route into the European market.
For the IS-04Z1 both routes are in progress with TÜV in Germany and neither certificate has been issued. The marking target is II 2 G Ex ib IIC T4: equipment Group II (surface industry), Category 2 (Zone 1 gas), protection concept ib (intrinsic safety), gas group IIC and temperature class T4.
In Ulsan. Ulsan combines refineries, petrochemical plants and shipyards, so a reviewer would expect ATEX and IECEx evidence from device suppliers working across all three, with international licensors and vessel owners present. The IS-04Z1 certification is in progress and only a datasheet exists now. Each operator decides what it accepts.
The route · specification
Specifying an ATEX and IECEx mobile phone for Ulsan
A short checklist for anyone writing or reviewing the specification, with the IS-04Z1 status against each point.
Check on the paper
- Marking
- Equipment group, category, protection concept, gas group and temperature class, matched to the area drawing.
- Certificate and schedule
- A certificate number, issuing body and the schedule of conditions, not a brochure claim.
- Standards edition
- The IEC 60079 or national standard edition the certificate was issued against.
Check for the IS-04Z1
- Marking target
- II 2 G Ex ib IIC T4: a target, not yet a certificate.
- Certificate status
- IECEx, ATEX, UKEX and NEC 500 in progress; none issued.
- Operator approval
- Separate from the certificate and handled with the site operator.
Questions · Ulsan
Frequently asked questions
Can we buy an ATEX and IECEx mobile phone in Ulsan 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 ATEX and IECEx mobile phone in Ulsan cost?
No price is published. While certification is in progress there is no list price and no committed lead time, and a supplier quoting a firm figure for an uncertified Ex handset is promising something it cannot stand behind. Indicative pre-launch pricing is issued in writing against a stated quantity and site.
Is the IS-04Z1 ATEX and IECEx certified?
Not yet. Both routes are in progress with TÜV in Germany and no certificate has been issued. Any listing that says otherwise is wrong.
Which areas at Ulsan would use it?
Likely candidates are refinery process units, petrochemical plants, tank farms, shipyard tank and cargo-space work. Which areas are classified, and to what zone, is set by the site operator's own area classification drawings.
Is intrinsically safe the same as explosion proof?
Not exactly. Explosion proof is a broad everyday term; intrinsic safety is one protection concept, which limits energy so ignition cannot occur. Flameproof (Ex d) is a different concept that contains an explosion. The IS-04Z1 is intrinsically safe by design.
Is the Ulsan climate hard on handheld equipment?
Summers are hot and humid with heavy rain from April to September, and winters are cold but dry, with a January mean around 2 degrees. Typically users want good ingress protection, battery performance in cold weather, and cleaning routines in coastal air.
Why does hydrogen matter for equipment choice in Ulsan?
Hydrogen is in a more demanding gas group than most hydrocarbons, and Ulsan has 188 km of hydrogen pipelines and a green-hydrogen town project. Where hydrogen is present, operators typically specify the gas group, so check what the site requires before selecting devices.
Who usually buys equipment for Ulsan plants?
Purchasing is normally handled by the operator or its maintenance contractors, and permits follow the operator's own rules. SAMS has appointed no distributor. Ask the operator whether contractors may bring their own devices, and confirm with the site operator.
Related guides
Keep exploring
More on Ulsan, and on other places in South Korea.
Industrial Mobile Phone in UlsanSame place, different guide
Intrinsically Safe Mobile Phone Distributor in UlsanSame place, different guide
IECEx Mobile Phone Distributor in UlsanSame place, different guide
Rugged Mobile Phone in UlsanSame place, different guide
Hazardous Area Mobile Phone in UlsanSame place, different guide
Explosion-Proof Mobile Phone Distributor in UlsanSame place, different guide
ATEX and IECEx Mobile Phone Distributor in BusanElsewhere in South Korea
ATEX and IECEx Mobile Phone Distributor in IncheonElsewhere in South Korea
ATEX and IECEx Mobile Phone Distributor in YeosuElsewhere in South Korea
ATEX and IECEx Mobile Phone Distributor in PohangElsewhere in South Korea
South Korea market guideCertification route and regulators
All guides for South KoreaEvery route we cover
Certification statusWhat is in progress
Enquiry · Ulsan
Ask about the IS-04Z1 for Ulsan, 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 · Ulsan
Launching Q4 2026
Planning for Ulsan?
Tell us the zone, gas group and operator. We will send the datasheet and the certification schedule.