Korean petrochemicals is a story of three coastal complexes, Ulsan, Yeosu and Daesan, where crackers, aromatics units and polymer plants sit beside refineries. An explosion proof mobile phone for South Korea has to suit that mix of gas, vapour and polymer dust. This page is for the HSE, instrumentation and telecoms teams who equip people on those sites. The IS-04Z1 is designed around intrinsic safety rather than a flameproof enclosure.
Launching Q4 2026 · IECEx and KOSHA programme in progress
At Ulsan, SK Energy's complex is shared with SK Geo Centric, SK Innovation's chemicals affiliate, and S-Oil is building an olefin and polymer expansion at Onsan. At Yeosu, GS Caltex completed a mixed feed cracker in late 2022, and other producers including Lotte Chemical, LG Chem and Hanwha have plants in the Yeosu area. At Daesan, Hyundai Oilbank integrates petrochemicals with its refinery, and Lotte Chemical, LG Chem and Hanwha TotalEnergies also operate there. Hazards are ethylene, propylene and aromatics streams in crackers and reactors, hydrogen in some units, and polyethylene or polypropylene powder in finishing. Which areas are Zone 1, 2, 21 or 22 is shown on each plant's classification drawings.
Plants differ, but these five points recur across the sector.
Crackers are gas risks and polymer finishing is a dust risk. The IS-04Z1 is designed for Zone 1 gas, II 2 G Ex ib IIC T4, with a Zone 21 target for dust, so one handset can be assessed for both. The final certificate states the scope.
Light olefin and hydrogen streams call for IIC, the most demanding common gas group. The design target addresses it, subject to certification.
Contractors at Ulsan, Yeosu or Daesan move between plants run by different companies. Each operator keeps its own approval process, so one approval does not carry to the next.
Crackers run for years between major shutdowns, and the shutdown that follows involves very large contractor numbers. Enrolment and wipe through Android Enterprise MDM keep a device pool under control.
Operators work in Korean, while licensors and some contractors use English. Android 16 carries both languages on one handset.
Petrochemical plants run around the clock, and operators work fixed rounds across furnace, compression and storage areas. Between shutdowns, maintenance is by permit; at the shutdown, a cracker is taken apart, inspected and rebuilt in a compressed window with a large visiting workforce. New units, such as those under construction or recently completed in Korea, also have start-up and performance-test periods with licensor engineers present. The handset's job changes with the phase: a robust round tool in steady operation, a fast-enrolled, tightly controlled device during the shutdown.
An operator logs readings, photographs equipment and phones the control room from the same handset.
Inspectors tag findings with a photograph and position on a furnace or vessel, ready for the report.
Staff work near powder handling, where the area classification includes dust, and use the same enrolled device across it.
Each producer's equipment approval is internal and we will not name a programme we cannot verify. For each plant, ask the operator's procurement and HSE teams for current requirements in writing. The usual items are below.
No. The device is pre-launch and certification, including IECEx and KOSHA recognition, is in progress ahead of the Q4 2026 launch.
The design targets are Zone 1 gas and Zone 21 dust. The actual scope will be written on the certificate, and each area's classification decides where it may go.
No. Companies in a shared zone such as Ulsan run their own procurement and site rules.
Korean operators generally expect KOSHA recognition to be addressed, with IECEx as the international evidence behind it. Confirm with each operator.
Tell us the site, the zone and gas group, and roughly how many handsets. The SAMS team replies by email with the datasheet and the certification schedule for South Korea. The IS-04Z1 is pre-launch and certification is in progress, so there is no list price yet; indicative pricing is issued in writing against a stated quantity and site.
Tell us the zone, gas group and operator. We will send the datasheet and the certification schedule for your market.
