Shipbuilding
HD Hyundai Heavy Industries builds tankers, LNG carriers and FPSOs at Ulsan and merged with HD Hyundai Mipo in 2025.
Ulsan · rugged
Rugged Mobile Phone in Ulsan
Ulsan was designated a Special Industrial Zone in 1962 under South Korea's first five-year plan, and Hyundai Heavy Industries founded its shipyard there in 1973, turning it into a company town. Process plants, tank farms and shipyard work create extensive Zone 1 and Zone 2 areas. If you are specifying a rugged mobile phone for Ulsan, this page covers the markings, the approvals and the current certification status 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 topicrugged
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.
Status: pre-launch. IECEx, ATEX, UKEX and NEC 500 certification is in progress and no certificate has been issued; launch is planned for Q4 2026. An operator's own vendor approval is a separate step. Certification status. Place facts reviewed October 2026.
At a glance · rugged
Checklist: rugged mobile phone for Ulsan
| Check | What to look for | IS-04Z1 today |
|---|---|---|
| Ingress protection | IP65 to IP68 sealing | IP68 design |
| Drop and shock | A stated drop height onto concrete | Specification on request |
| Explosion protection | A separate certificate and marking | 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: where the IS-04Z1 would work
Who operates there and which kinds of classified area a handset would meet, from the SAMS site research.
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
Site conditions at Ulsan: what wears and what limits equipment
Refining
SK Energy and S-Oil operate refineries in Ulsan; S-Oil's Onsan refinery had about 650,000 barrels per day in 2016.
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 · rugged
What “rugged” means for a smartphone
A rugged phone is built to survive water, dust, drops and rough handling, usually rated by an IP code and a drop specification. Ruggedness is an environmental property: it says nothing about whether a phone may be used where flammable gas or dust is present. That is decided by explosion-protection certification and marking.
The IS-04Z1 combines both: an IP68 sealed rugged build and a design for Zone 1 and Zone 21 (marking target Ex ib IIC T4). The explosion-protection certificates are in progress and none has been issued.
In Ulsan. Ulsan is a south-east coastal industrial city, so sea air, summer rain and winter cold are routine for outdoor crews. IP68 sealing is designed in for the IS-04Z1 and helps with those conditions. It is a dust and water rating, not explosion protection, which depends on certification in progress.
The route · specification
Specifying a rugged 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 a rugged 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 a rugged mobile phone in Ulsan cost?
SAMS has not published a price. Any figure you are offered for an uncertified Ex phone should be treated with caution; written indicative pricing is available for a defined quantity and site.
How rugged is the IS-04Z1?
It is designed to IP68 sealing, with glove-friendly controls. Ruggedness is not explosion protection: that depends on the certificates, which are in progress.
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
Other guides for Ulsan, other places in South Korea, and the pages behind them.
Ex-Proof Mobile Phone Distributor in UlsanSame place, different guide
Industrial Mobile Phone Distributor in UlsanSame place, different guide
IECEx Mobile Phone Distributor in UlsanSame place, different guide
Hazardous Area Mobile Phone in UlsanSame place, different guide
Intrinsically Safe Mobile Phone in UlsanSame place, different guide
Explosion-Proof Mobile Phone in UlsanSame place, different guide
ATEX and IECEx Mobile Phone Distributor in PohangElsewhere in South Korea
ATEX and IECEx Mobile Phone Distributor in IncheonElsewhere 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 · Ulsan
Ask about the IS-04Z1 for Ulsan, South Korea
Tell us what you need to equip and where. The SAMS team answers by email with the datasheet and where each certification route stands.
Enquiry · Ulsan
Launching Q4 2026
Planning for Ulsan?
Name the site and the operator and we will send what is available before launch.