Ownership
HD Hyundai Oilbank and Lotte Chemical each hold 50% and each contributed 600 billion won.
Daesan · explosion proof
Explosion-Proof Smartphone in Daesan
Daesan is a petrochemical complex in Seosan, South Chungcheong Province, on the Yellow Sea coast. The summer monsoon lasts about three weeks in June or July with strong winds and heavy rain, and mild typhoons can affect the area in summer, so outdoor work is often rescheduled. This page explains what to look for in an explosion proof smartphone for Daesan, 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
WhereDaesan
Short answer. The SAMS IS-04Z1 is the intrinsically safe smartphone covered here for Daesan: pre-launch, designed for Zone 1 and Zone 21 (marking target Ex ib IIC T4), with certification in progress and no certificate issued.
Current position: certification in progress, nothing issued, launch targeted for Q4 2026. Operator approval runs on its own timeline. Certification status. Place facts reviewed October 2026.
At a glance · explosion proof
Checklist: explosion proof smartphone for Daesan
| 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 | Daesan: Naphtha cracker and petrochemical units, Refinery process units, Tank farms | Classified by the site operator |
Product · Daesan
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 Daesan. 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 · Daesan
Daesan: 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
- H&L Advanced (HD Hyundai Oilbank and Lotte Chemical, 50% each)
- HD Hyundai Oilbank
Classified areas to expect
- Naphtha cracker and petrochemical units
- Refinery process units
- Tank farms
- Hydrogen handling
Local conditions · Daesan
Conditions in Daesan that affect handheld equipment
Hydrogen
A hydrogen shipment centre began operating at the Daesan plant in November 2025.
Field notes · Daesan
More about Daesan that matters for portable equipment
Daesan: projects and investment
Upgrades completed by 2021 lifted Daesan capacity to about 1.5 million tonnes a year of ethylene and 1.1 million of propylene, and let the plant also crack propane.
Daesan: industry on the ground
HD Hyundai Chemical is owned 60% by HD Hyundai Oilbank and 40% by Lotte Chemical, and in late 2025 the partners agreed to consolidate their Daesan naphtha crackers, subject to ministry approval.
Daesan: people and language
Seosan had a population of roughly 175,000 in the 2017 census, which sets the scale of the local labour pool beside the coastal industrial area.
Daesan: geography and layout
Daesan lies within Seosan city on the Yellow Sea coast of South Chungcheong Province, about 125 km south of Seoul and 34 km north-west of Naepo New Town.
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 Daesan. In a cracker or refinery, explosion-proof is everyday shorthand. Flameproof Ex d protects fixed equipment, while a handheld phone around process units relies on intrinsic safety. The IS-04Z1 is designed on that basis. Certification is in progress, and the operator's rules still decide where a phone may be used.
The route · specification
Specifying an explosion proof smartphone for Daesan
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 · Daesan
Frequently asked questions
Can we buy an explosion proof smartphone in Daesan 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 explosion proof smartphone in Daesan cost?
There is no list price yet. SAMS gives indicative pre-launch pricing in writing, against a stated quantity and site, and does not commit to a lead time before certification completes.
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 Daesan would use it?
Likely candidates are naphtha cracker and petrochemical units, refinery process units, tank farms, hydrogen handling. 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.
Where is Daesan and how do I reach it for site work?
Daesan is part of Seosan on the Yellow Sea coast, about 125 km south of Seoul, and the area is served by the Seohaean Expressway and several national highways. Most visitors travel by road from Seoul or Daejeon, so plan equipment transport accordingly.
What weather issues affect handheld devices at Daesan?
Spring Asian dust, a short but heavy summer monsoon, occasional typhoons and cold winters all occur. Typically devices need good dust and water ingress protection and a reliable battery in the cold, and sites may pause outdoor work in severe weather.
Does hydrogen handling affect which phone can be used?
Yes. Hydrogen is a Group IIC gas, so equipment for those areas needs a suitable gas-group marking. The IS-04Z1 target marking includes IIC but no certificate has been issued. Ask the operator which Daesan areas it classes as hydrogen hazards.
Related guides
Keep exploring
Other guides for Daesan, other places in South Korea, and the pages behind them.
Rugged Mobile Phone in DaesanSame place, different guide
Intrinsically Safe Mobile Phone in DaesanSame place, different guide
ATEX and IECEx Mobile Phone in DaesanSame place, different guide
Industrial Mobile Phone in DaesanSame place, different guide
Ex-Proof Mobile Phone in DaesanSame place, different guide
IECEx Mobile Phone in DaesanSame place, different guide
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 UlsanElsewhere 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 · Daesan
Ask about the IS-04Z1 for Daesan, 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 · Daesan
Launching Q4 2026
Planning for Daesan?
Tell us the zone, gas group and operator. We will send the datasheet and the certification schedule.