Port
Yeongil Bay supports a port that handled 54.8 million tonnes in 2006.
Pohang · explosion proof
Explosion-Proof Smartphone in Pohang
Pohang is North Gyeongsang's largest city, with about 491,000 residents, on the East Sea coast beside Yeongil Bay. 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. This page explains what to look for in an explosion proof smartphone for Pohang, 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 topicexplosion proof
DeviceSmartphone
RouteSpecification
WherePohang
Short answer. The SAMS IS-04Z1 is the intrinsically safe smartphone covered here for Pohang: 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. Operator approval runs on its own timeline. Certification status. Place facts reviewed October 2026.
At a glance · explosion proof
Checklist: explosion proof smartphone for Pohang
| 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 | 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
Pohang: 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
- POSCO
Classified areas to expect
- Steelworks process gas systems
- Coke-making and by-product gas
- Steel plant dust areas
Local conditions · Pohang
Conditions in Pohang that affect handheld equipment
Climate
Mild winters and warm, wet summers; about 1,192 mm of rain a year.
Field notes · Pohang
More about Pohang that matters for portable equipment
Pohang: people and language
The city is promoting itself as a diversified centre of environmentalism, advanced learning and culture, to reduce its reliance on heavy industry such as steelmaking.
Pohang: logistics and access
Pohang's shipping port and road arteries made it strategically significant in the mid-twentieth century, and the port remains the city's sea gateway on the East Sea coast.
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.
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 Pohang. In a steelworks, explosion-proof is a loose label. Flameproof Ex d fits fixed motors and junction boxes, while a handheld phone near by-product gas lines depends on intrinsic safety. The IS-04Z1 is designed around that concept, with certification in progress and POSCO's own rules deciding where it may be used.
The route · specification
Specifying an explosion proof smartphone for Pohang
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 · Pohang
Frequently asked questions
Can we buy an explosion proof smartphone in Pohang today?
No. Nothing can be bought or taken into a classified area today: certification is in progress and launch is planned for Q4 2026. What is available now is the datasheet, the written certification schedule and evaluation units for safe-area use.
What does an explosion proof smartphone 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.
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 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.
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 Pohang reliant on one employer for contractor work?
POSCO's plant has anchored the local economy since 1972, so much industrial contracting there is linked to it, though shipbuilding and other industries also exist. Contractors typically register through the operator's own vendor and safety processes, so confirm the current route.
What hazardous-area risks are typical at a steelworks like Pohang?
Steel plants involve coke-oven, blast-furnace and converter gases that are toxic and flammable, plus oxygen enrichment, coal and iron-ore dust and fuel gas systems. The operator defines gas and dust zones, so ask for classification drawings before bringing handheld devices.
Who registers suppliers at the Pohang works?
POSCO runs its own supplier registration and safety approvals, and SAMS has no role in them. A supplier or distributor would need to approach its procurement and HSE teams directly. Confirm requirements with the site operator, and note that the IS-04Z1 is still pre-launch.
Related guides
Keep exploring
Related guides for Pohang and for South Korea.
Hazardous Area Mobile Phone Distributor in PohangSame place, different guide
Rugged Mobile Phone in PohangSame place, different guide
Ex-Proof Mobile Phone Distributor in PohangSame place, different guide
IECEx Mobile Phone Distributor in PohangSame place, different guide
ATEX and IECEx Mobile Phone in PohangSame place, different guide
Industrial 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 DaesanElsewhere in South Korea
ATEX and IECEx Mobile Phone Distributor in BusanElsewhere in South Korea
ATEX and IECEx Mobile Phone Distributor in UlsanElsewhere 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
Share the site details and quantity. You will get the datasheet and the certification schedule back by email; pricing is indicative only until launch.
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.