ExxonMobil’s Singapore manufacturing complex joins a refinery at Jurong with the Singapore Chemical Plant on Jurong Island, so a single operator’s fence line takes in fuels, lube base stocks, a steam cracker and polymer finishing. This page is for the process, maintenance, WSH and IT people who decide what an explosion proof mobile phone in Singapore may be carried into that complex. The IS-04Z1 is pre-launch and no certificate has been issued. The IS-04Z1 is designed around intrinsic safety rather than a flameproof enclosure.
Launching Q4 2026 · certification programme in progress
ExxonMobil describes its Singapore manufacturing as an integrated complex: crude comes into the Jurong refinery, and the chemical plant on Jurong Island takes feed from it and from imported streams. Two projects in the last few years changed what is on site. A new steam cracker was built that ExxonMobil describes as able to take feeds from light gases to crude oil, and the Singapore Resid Upgrade Project was announced to convert fuel oil into lube base stocks and lower-sulphur distillates. The hazards are not uniform. Refinery hydrocarbon vapour is mostly gas group IIA or IIB. Hydrogen, present at hydrotreating and in cracker service, is IIC, as is acetylene wherever a cracker’s acetylene removal system sits. Polymer finishing adds combustible powder and pellet dust, which is a Zone 21 or 22 question rather than a gas one. A handset for this complex has to be specified to the worst of those, not the average.
The area classification decides whether a device may be carried at all. After that the complex decides how long it lasts, and what the people holding it need from it.
A cracker and a hydrotreater both put hydrogen on the plot plan. A handset marked for IIB only is unusable in those areas, so the marking target for the IS-04Z1 is II 2 G Ex ib IIC T4. Your instrumentation engineer checks the temperature class on the certificate against the surface temperature each area allows.
Operators walk a unit in a loop and often cover several loops in a shift. Charging happens in a safe area, not at the unit, so the 4,000 mAh battery has to carry radio, camera and GNSS for the whole round pattern without a mid-shift swap.
Singapore has no cool season and heavy afternoon rain. IP68 sealing and rugged build are the design answer to wet, warm steel and washdown, with the certificate stating the permitted ambient range.
When a unit is shut down, the people working in it are mostly contractors on short permits. A handset that enrols in Android Enterprise and is managed from an existing MDM console can be issued, restricted to approved applications and wiped at the end of the job.
Any new electronic device is a change to the site, and an operator of this size will assess it through its own management of change and contractor safety processes. We do not claim a programme or a list; ask ExxonMobil’s procurement and HSE teams what they need from a supplier of Ex equipment, and we will answer against that.
An operator logs a reading, photographs a weeping flange and calls the control room from the same device. The photograph carries a position and time, so the next shift can find the exact flange rather than a description of it.
On a shutdown, a supervisor checks an isolation, photographs the lock and passes the status to the coordination room without walking to a safe area first. The record stays tied to the person doing the check.
An inspector captures corrosion findings and location in the field, then uploads them from a safe area. Inspection teams are often contractors, so the handset can be enrolled for the length of the campaign and released afterwards.
Wherever hydrogen is present in quantity, which includes hydroprocessing and parts of the cracker. Ask the site’s area classification drawings for the gas group by area. The IS-04Z1 marking target is IIC so that one device covers the IIC areas and the IIA and IIB ones around them.
That is a question for the site’s permit system rather than for the device. What the handset offers is Android Enterprise enrolment, so a contractor fleet can be configured, limited to approved applications and reset when the crew leaves.
Polymer finishing and silo areas can be classified for combustible dust, which is why the design target is Zone 21 alongside Zone 1. Which areas count is set by the operator’s own dust hazard assessment, not by a supplier.
No. This page describes what an ExxonMobil site would need from an explosion proof mobile phone and what the IS-04Z1 is designed for. It is not an endorsement, a pilot or a supply agreement, and certification is still in progress ahead of the Q4 2026 launch.
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 Singapore. 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.
