An explosion proof mobile phone for Idemitsu Kosan sites in Japan has to suit refineries and petrochemical complexes under one company name. Idemitsu grew as an independent, family-founded company and combined with Showa Shell Sekiyu in April 2019, which brought a former Shell-group refiner into the same organisation. This page is for the HSE, instrumentation and telecoms people who decide what may be carried past the gate. The IS-04Z1 is designed around intrinsic safety rather than a flameproof enclosure.
Launching Q4 2026 · certification and vendor documentation in progress
The 2019 merger with Showa Shell means Idemitsu Kosan's engineering review can draw on both its own long-standing Japanese practices and standards inherited from Shell's international operations.
Showa Shell's history as part of the Shell group means some of its former sites carry documentation and engineering conventions closer to Shell's international (ATEX-influenced) standards, which the IS-04Z1's certification programme is designed to be recognisable against, alongside IECEx and JIS.
Idemitsu Kosan's roots as an independently run, family-founded company gave it a distinct corporate culture from the more consolidation-driven ENEOS, an independence that has shaped its own vendor relationships and procurement style even after the Showa Shell merger.
Refinery process units and petrochemical production at Idemitsu Kosan sites are classified Zone 1 gas atmospheres, and Ex ib IIC T4 covers the hydrocarbon gas groups typical of both.
As with any major merger, harmonising former Idemitsu and former Showa Shell sites' engineering and vendor-approval conventions is an ongoing process, relevant context for how a new vendor's documentation gets received at a given site.
EMM and MDM enrolment supports Idemitsu Kosan managing a consistent device profile across sites with different corporate heritages.
A major Japanese refiner and petrochemical producer, formed through the 2019 merger of the family-founded Idemitsu company and Showa Shell Sekiyu.
After the 2019 integration Idemitsu's refining footprint includes Hokkaido at Tomakomai, Chiba at Ichihara, Aichi at Chita and Yokkaichi in Mie, together with the Tokuyama petrochemical complex in Yamaguchi Prefecture. The Chiba site is a refinery and petrochemical complex in one, so a shift can pass from a petrochemical unit to crude distillation within the same fence. Typical hazards are hydrocarbon vapour from crude and product streams, hydrogen from hydroprocessing, aromatics such as benzene, and polymer powder in downstream plants. Zone 1 and Zone 2 gas areas dominate, with dust areas where powder is handled. Check the classification drawing for the specific unit before choosing a device.
Former Showa Shell sites may be more used to documentation in the style of an international oil major, while legacy Idemitsu sites follow Japanese practice. A supplier that prepares one clear document set suited to both avoids being asked for it twice.
Idemitsu refineries run planned shutdowns when units are stopped, inspected and restarted. Contractors arrive in numbers, and a handset enrolled in a managed fleet can be issued with the permit and photo-reporting apps already installed.
Outdoor rounds in a northern winter test battery capacity and touchscreen use with gloves. Check the ambient temperature range on the certificate against the lowest temperature the site expects.
No. The device is pre-launch, and certification is still in progress ahead of the Q4 2026 launch.
Some former Showa Shell sites may be more familiar with ATEX-style documentation given Shell's international background, so the certification programme is designed to be recognisable across both ATEX-influenced and standard Japanese conventions.
Harmonisation is an ongoing process; sites with different corporate heritage may still reflect some of their own historical conventions.
No, all three are separate, competing Japanese refiners with their own distinct procurement processes.
Refinery process units, tank farms, jetties and petrochemical plants at sites such as Chiba, Aichi and Yokkaichi are the usual candidates. The classification drawing and permit rules at each site decide, and should be checked with the site engineer.
Ask the relevant Idemitsu procurement and HSE teams for the supplier registration process and hazardous-area equipment requirements. SAMS has not verified a specific programme and does not claim one.
Not on the device side. The design target is one Zone 1 / Zone 21 handset, with a documentation set a reviewer used to either convention can follow. Each site still reviews it independently.
Combustible powder handling creates dust areas, often Zone 21 or 22, at downstream plants. The IS-04Z1 design target includes Zone 21, subject to the certificate once issued.
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 Japan. 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.
