Steelworks
POSCO's Pohang plant was dedicated in 1973 and POSCO runs two integrated steelworks, at Pohang and Gwangyang.
Pohang · Ex-proof
Ex-Proof Mobile Phone Distributor in Pohang
Pohang is North Gyeongsang's largest city, with about 491,000 residents, on the East Sea coast beside Yeongil Bay. It is headquarters of POSCO, which has an integrated steelworks there, and steel plant gas systems and dust create classified areas. Distribution partners for Pohang 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 topicEx-proof
DeviceMobile Phone
RouteDistribution
WherePohang
Short answer. Pohang 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.
Where things stand: the IS-04Z1 has not launched, and none of its four certification routes has produced a certificate yet. An operator's own vendor approval is a separate step. Certification status. Place facts reviewed October 2026.
At a glance · Ex-proof
Checklist: Ex-proof mobile phone for Pohang
| Check | What to look for | IS-04Z1 today |
|---|---|---|
| Ex marking | Group, category, protection concept, gas group, temperature class | II 2 G Ex ib IIC T4 (target) |
| Gas group | IIA, IIB or IIC matched to the area drawing | IIC (target) |
| Temperature class | T-class below the ignition temperature of the gas | T4, 135 °C (target) |
| Where it applies | Pohang: Steelworks process gas systems, Coke-making and by-product gas, Steel plant dust areas | Classified by the site operator |
Product · Pohang
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 Pohang. 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 · Pohang
Working in Pohang: operators and classified areas
The companies on site and the hazardous-area types a handset is likely to meet there.
Operators and companies on site
- POSCO
Classified areas to expect
- Steelworks process gas systems
- Coke-making and by-product gas
- Steel plant dust areas
Local conditions · Pohang
What Pohang means for portable equipment
Port
Yeongil Bay supports a port that handled 54.8 million tonnes in 2006.
Field notes · Pohang
More about Pohang that matters for portable equipment
Pohang: industry on the ground
POSCO's Pohang works runs three remaining blast furnaces after the first was shut down in December 2021, alongside basic oxygen and electric arc furnace routes.
Pohang: background
After four expansion phases the Pohang plant's crude steel capacity rose from 1.03 million tonnes a year at start-up to 9.1 million tonnes by 1983.
Pohang: background
The local economy has combined iron, steel, shipbuilding and fisheries, and the city is now trying to diversify away from heavy industry towards advanced learning, environmental projects and culture.
Pohang: geography and layout
Pohang is the largest city in North Gyeongsang Province, with 499,363 residents in 2022, on Yeongil Bay at the mouth of the Hyeongsan River facing the East Sea.
The term · Ex-proof
What “Ex-proof” means for a smartphone
“Ex-proof” is shorthand for equipment carrying an explosion-protection marking (the Ex mark) that matches the area it enters. The marking states the protection concept, gas or dust group and temperature class, and it must be backed by a certificate issued by a recognised body, so a phone described as Ex-proof should come with a certificate number you can check.
The IS-04Z1 is designed to carry the marking II 2 G Ex ib IIC T4. That is a target: certification is in progress, no certificate has been issued, and SAMS will publish the certificate numbers when they exist.
In Pohang. A marking check at a steelworks should note that process gases from coke-making and by-product gas systems are not typical oil and gas gases. Hydrogen-rich or carbon monoxide mixtures may need specific gas groups. The IS-04Z1 target marking is II 2 G Ex ib IIC T4, not yet issued, so the operator decides.
The route · distribution
Distributing the IS-04Z1 in Pohang
Distribution of the IS-04Z1 is by authorised partners only, and SAMS has not yet granted a territory for Pohang. 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 Pohang.
- 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 · Pohang
Frequently asked questions
Can we buy an Ex-proof mobile phone in Pohang 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 Ex-proof mobile phone in Pohang 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.
What Ex marking will the IS-04Z1 carry?
The marking target is II 2 G Ex ib IIC T4. It becomes a marking only when the certificate is issued; until then it is a design target.
Which areas at Pohang would use it?
Likely candidates are steelworks process gas systems, coke-making and by-product gas, steel plant dust areas. 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 Pohang?
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 Pohang.
Is Pohang humid or cold enough to affect equipment?
Winters are mild by Korean standards, with a January mean near 2 degrees, while summers reach about 26 degrees with the heaviest rain in August. Sea air and humidity are the main concerns, so devices typically need good sealing and routine cleaning.
How do I get equipment to Pohang?
Pohang is on the East Sea coast with a shipping port and road links, and most equipment arrives by road from other Korean ports or airports. Allow time for customs clearance and for site gate checks on electronic devices at the steelworks.
Do steelworks gases need a different marking from oil and gas sites?
They can. Coke-making and by-product gas systems may contain gases such as hydrogen or carbon monoxide, which affect the gas group needed, and plant dust areas need a dust classification. The IS-04Z1 has no certificate yet. Ask POSCO which gas and dust groups apply.
Related guides
Keep exploring
Other guides for Pohang, other places in South Korea, and the pages behind them.
Rugged Mobile Phone Distributor in PohangSame place, different guide
IECEx Mobile Phone Distributor in PohangSame place, different guide
Hazardous Area Mobile Phone in PohangSame place, different guide
ATEX and IECEx Mobile Phone Distributor in PohangSame place, different guide
Industrial Mobile Phone in PohangSame place, different guide
Explosion-Proof Mobile Phone in PohangSame 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 YeosuElsewhere in South Korea
ATEX and IECEx Mobile Phone Distributor in BusanElsewhere in South Korea
South Korea market guideCertification route and regulators
All guides for South KoreaEvery route we cover
Certification statusWhat is in progress
Enquiry · Pohang
Ask about the IS-04Z1 for Pohang, 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 · Pohang
Launching Q4 2026
Planning for Pohang?
Tell us the zone, gas group and operator. We will send the datasheet and the certification schedule.