Shipbuilding
HD Hyundai Heavy Industries builds tankers, LNG carriers and FPSOs at Ulsan and merged with HD Hyundai Mipo in 2025.
Ulsan · explosion proof
Explosion-Proof Mobile Phone Distributor in Ulsan
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. Process plants, tank farms and shipyard work create extensive Zone 1 and Zone 2 areas. Distribution partners for Ulsan 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 topicexplosion proof
DeviceMobile Phone
RouteDistribution
WhereUlsan
Short answer. Ulsan 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.
Current position: certification in progress, nothing issued, launch targeted for Q4 2026. An operator's own vendor approval is a separate step. Certification status. Place facts reviewed October 2026.
At a glance · explosion proof
Checklist: explosion proof mobile phone for Ulsan
| Check | What to look for | IS-04Z1 today |
|---|---|---|
| Protection concept | Flameproof (Ex d) or intrinsic safety (Ex i) | Intrinsic safety, level ib |
| Zone suitability | Zone 1 gas and Zone 21 dust | Design target for Zone 1 and 21 |
| Certificate | Number, issuing body and schedule of conditions | In progress; not issued |
| Where it applies | Ulsan: Tank farms, Shipyard tank and cargo-space work, Refinery process units | 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
Conditions in Ulsan that affect handheld 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: background
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.
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 · explosion proof
What “explosion proof” means for a smartphone
“Explosion proof” is the phrase most buyers use for equipment that may be taken into a classified hazardous area. Strictly, it covers several protection concepts: a flameproof enclosure (Ex d) contains an internal explosion, while intrinsic safety (Ex i) limits electrical energy so that an ignition cannot start. Phones are normally intrinsically safe, because a flameproof handset would be too heavy to carry all shift.
The IS-04Z1 uses intrinsic safety, with a marking target of Ex ib IIC T4, and is designed for Zone 1 and Zone 21. It is pre-launch, certification is in progress and no certificate has been issued.
In Ulsan. In an Ulsan refinery or yard, explosion-proof is a casual label. Flameproof Ex d suits fixed equipment, while a handheld phone in process areas or a vessel tank relies on intrinsic safety. The IS-04Z1 is designed around that concept, with certification in progress and each operator's rules applying.
The route · distribution
Distributing the IS-04Z1 in Ulsan
Distribution of the IS-04Z1 is by authorised partners only, and SAMS has not yet granted a territory for Ulsan. Each application is reviewed on its merits. Because opening a certified Ex handset in an ordinary workshop invalidates its certificate, the partner must be able to support and service the device locally.
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 Ulsan.
- 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 · Ulsan
Frequently asked questions
Can we buy an explosion proof mobile phone in Ulsan today?
Not yet. The IS-04Z1 is pre-launch and its certification is still in progress ahead of a Q4 2026 launch. No unit goes into a classified area before the certificate covering it exists. The datasheet, the certification schedule and safe-area evaluation units are available now.
What does an explosion proof 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 explosion proof or intrinsically safe?
It is intrinsically safe (marking target Ex ib IIC T4), which is the usual way to make a phone for hazardous areas. It is not a flameproof (Ex d) design, and certification is still 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.
How do I become a SAMS distributor for Ulsan?
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 Ulsan.
Which hazardous-area industries are concentrated in Ulsan?
Two very large refineries, petrochemical complexes, a major shipyard, an automobile plant and a growing hydrogen network. Gas, vapour and hydrogen areas are the typical concerns, and each operator classifies its own plant, so request zone drawings before using handheld devices.
Can shipyard work in Ulsan involve classified areas as well as refinery work?
Yes. Fuel and cargo tanks, paint stores, coating bays and hot-work areas can all be treated as hazardous locations. Shipyards usually issue gas-free and hot-work permits, so ask how portable devices are controlled under those permits.
Do shipyard and refinery requirements differ in Ulsan?
They can. Shipyards work in vessel tank and cargo spaces under permits for each vessel, while refineries classify fixed process areas, so approvals and markings may differ. The IS-04Z1 has no certificate yet. Ask each facility for its own device rules.
Related guides
Keep exploring
Other guides for Ulsan, other places in South Korea, and the pages behind them.
Intrinsically Safe Mobile Phone in UlsanSame place, different guide
IECEx Mobile Phone Distributor in UlsanSame place, different guide
Rugged Mobile Phone Distributor in UlsanSame place, different guide
Ex-Proof Mobile Phone in UlsanSame place, different guide
Industrial Mobile Phone Distributor in UlsanSame place, different guide
ATEX and IECEx Mobile Phone in UlsanSame place, different guide
ATEX and IECEx Mobile Phone Distributor in DaesanElsewhere in South Korea
ATEX and IECEx Mobile Phone Distributor in PohangElsewhere in South Korea
ATEX and IECEx Mobile Phone Distributor in BusanElsewhere in South Korea
ATEX and IECEx Mobile Phone Distributor in YeosuElsewhere 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?
Name the site and the operator and we will send what is available before launch.