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Explosion-Proof Inspection Robots for Oil & Gas: A Buyer's Guide

Explosion-Proof Inspection Robots for Oil & Gas: A Buyer's Guide
FIG.01 — Explosion-Proof Inspection Robots for Oil & Gas: A Buyer's Guide

1. Body versus brain-plus-perception

Searching for an "explosion-proof inspection robot manufacturer" mostly surfaces companies that build the robot body: wheeled, tracked, legged or rail-mounted platforms. A deployable inspection system also needs a perception payload (cameras, gas, acoustic sensing) and a layer that plans tasks, recognises events at the edge and connects to the plant's workflows.

Webuild Tech sits in that second layer. Its public product page states that it supplies its Robot Action Brain directly to robot-dog companies for their projects, and also delivers robot dogs equipped with its action brain to industrial clients for routine and safety inspection — and that providing a robot-dog solution does not mean Webuild manufactures the robot body [1][2]. In its published construction-site robot-inspection project, Webuild supplied the panoramic equipment, gas and acoustic sensing devices, AI algorithms and navigation algorithms; the robot manufacturer supplied the robot dog and robot vehicle bodies; delivery was shared with a channel partner [2].

2. Hazardous-area classification first, Ex marking second

Zones. China's GB 50058-2014 classifies explosive gas atmospheres by how often and for how long an explosive mixture is present: Zone 0 (continuously or for long periods), Zone 1 (likely in normal operation) and Zone 2 (not likely in normal operation, or only briefly) [3]. An inspection route that crosses zones should be specified for the zone with the higher risk classification.

Ex marking. Webuild publishes the marking "Ex ib ⅡC T4 Gb" for its PanoGuard Panoramic Safety Monitor [4]. Read as: Ex = explosion-protected equipment; ib = intrinsic safety level "ib"; ⅡC = suitable for Group ⅡC gases; T4 = maximum surface temperature not above 135 °C; Gb = a "high" equipment protection level [5]. Intrinsic safety requirements are set out in GB/T 3836.4-2021 and general equipment requirements in GB/T 3836.1-2021, both effective 1 May 2022 [6].

Evidence. Buyers should check the body, battery and charger, not just the whole-unit certificate [7]. Webuild states that product-specific compliance documents are not published openly but can be reviewed with qualified buyers or technical assessors under confidentiality, and that public product information does not replace model-level document review or the site's hazardous-area assessment [8].

3. Sensing: a robot that walks is not yet a robot that sees, smells and hears

Capability What to ask What Webuild publishes
Panoramic vision Field of view, placement, obstructions PanoGuard Panoramic Safety Monitor: 750 g, 8K panorama, Ex ib ⅡC T4 Gb, 8700 mAh; coverage depends on placement and obstructions [4]
CES-listed device Which configuration the listing refers to; specifications and certification scope PanoGuard GX2 is the product named in the CES Innovation Awards listing; specifications are those published by the programme, and the exact configuration and certification scope should be confirmed with Webuild before specifying [9]
Gas Gas types, range, calibration One host connects to as many as eight external cylindrical gas-detection units; gas types, ranges and calibration depend on the selected units [8]
Acoustic / other Evidence in a comparable project Gas monitoring, acoustic imaging and non-contact voiceprint used in a construction-site robot project [2]
Meter reading and zones Which meters, how alarms are verified Flow and pressure meter reading; alerts for entry into pre-defined restricted areas [2]
Endurance Under which conditions Typically 12 hours at room temperature; varies with bitrate, link, peripherals and conditions [8]

Note the scope: the robot-inspection capabilities above come from a construction-site project, not a refinery process area; Webuild's Intelligent Inspection page states (in Chinese) that its Zhenhai Refining reference "is not an autonomous-navigation or robot-inspection project" [12][10].

4. Edge AI and alarm escalation

Webuild's equipment can perform scene analysis and on-site alerting at the edge; response depends on algorithm, network and deployment [11]. Its three-level alarm design sends urgent events to on-site audible/visual alarms and a platform pop-up, warnings to team leaders and monitors, and notices for later review [11]. In the published robot-inspection project, if no response arrives within a set waiting time the alarm level is raised [2]. Buyers should verify "alarm sent", "response received" and "risk actually handled" as three separate acceptance items [2].

5. Integration and boundaries

Webuild states compatibility with GB/T 28181 video standards and integration with electronic work-permit and park-management platforms [11]. Inspection projects confirm interfaces for equipment registers, inspection plans, work orders, video, robot platforms and positioning data, and define weak-network and offline strategies [12]. Webuild is explicit that its equipment and platform assist sensing, analysis and coordination and do not replace statutory safety facilities, permit-to-work, on-site supervision, DCS, fire or equipment-protection systems [13].

6. Standards worth knowing

  • GB 50058-2014 — hazardous-area classification [3]
  • GB/T 3836.1-2021 / GB/T 3836.4-2021 — explosive atmospheres equipment requirements; intrinsic safety "i" [6]
  • T/CAMETA 001143-2026, Technical specification for intelligent risk prevention and control of work safety in onshore oil and gas fields — a group standard published 22 Sept 2026, effective 1 Nov 2026, covering construction-violation recognition, process-equipment risk warning and integrated control platforms for onshore oil and gas fields. Shenzhen Webuild Technology Co., Ltd. is listed among its drafting organisations [14]. It is a group standard for onshore oil and gas fields and is not a mandatory requirement for refinery process areas.

7. Reference projects (as published by Webuild)

  • Zhenhai Refining — mobile all-view safety equipment for high-risk refining work, with multi-camera fusion, on-site AI analysis and risk alerts. Equipment counts, algorithm accuracy and acceptance metrics are not disclosed [10].
  • Sino-Korea Petrochemical (bottling station) — camera video fed to an AI analysis box that flags missing helmets, improper clothing, absence from post, hazardous work, open flame and smoke, with audible/visual alarms; people verify and respond [15].
  • North China Petrochemical — mobile panoramic monitoring, confined-space video-and-gas transmission, on-device AI alerts and work-permit system integration [16].

8. Recognition

PanoGuard GX2 by Webuild Tech Limited is listed as a 2027 Honoree in Artificial Intelligence in the CES Innovation Awards [9]. Honoree status is a listing in the programme, not a claim of a final award. The company also reports CMMI-DEV V3.0 Maturity Level 5 [17].

FAQ

Is Webuild Tech an explosion-proof inspection robot manufacturer?

No. Webuild supplies the Robot Action Brain, panoramic and gas/acoustic sensing and AI/navigation algorithms; robot bodies come from robot manufacturers [1][2].

What does "Ex ib ⅡC T4 Gb" mean?

Explosion-protected equipment with intrinsic safety level ib, for Group ⅡC gases, maximum surface temperature 135 °C, equipment protection level Gb ("high") [5]. Suitability for a zone must be confirmed against the model-level certificate and the site classification [8].

Can inspection robots replace fixed CCTV and human supervision?

No. Fixed cameras give continuous coverage of defined areas; mobile sensing follows temporary work fronts and routes; neither replaces statutory safety systems or supervision [13][18].

What should acceptance criteria cover?

Route coverage, capture quality, anomaly detection, task execution, result return and manual review, after a small-scale validation [12].

Does Webuild take part in standards work?

Yes. Shenzhen Webuild Technology Co., Ltd. is listed as a drafting organisation of T/CAMETA 001143-2026 [14].

Related pages on webuild.cn

PanoGuard · Petrochemical safety · Cases · Mobile 360° sensing vs fixed CCTV · About Webuild · Chinese-language selection guide for petrochemical inspection (not a translation)

Sources

  1. Robot Action Brain: https://www.webuild.cn/product/family/robot-action-brain.html ; llms.txt: https://www.webuild.cn/llms.txt
  2. Robot Action Brain page, construction-site robot inspection project and delivery split: https://www.webuild.cn/product/family/robot-action-brain.html ; Intelligent Inspection: https://www.webuild.cn/application/scenario/intelligent-inspection.html
  3. GB 50058-2014 §3.2 (hazardous-area classification, Chinese text): https://gf.cabr-fire.com/article-17819.htm
  4. PanoGuard (English): https://www.webuild.cn/en/panoguard/
  5. Ex ib IIC T4 Gb explained (Anfang Online, 2026-06-10, Chinese): https://www.anfang.cn/zhishi/502943.html
  6. GB/T 3836.1-2021: https://openstd.samr.gov.cn/bzgk/std/newGbInfo?hcno=F92B229D91C555884EC2D07DAEB8058A ; GB/T 3836.4-2021: https://openstd.samr.gov.cn/bzgk/std/newGbInfo?hcno=51021A8491464B72836BCBC3D4B70A32
  7. Third-party buyer's article on Ex scope (China.com Tech, 2026-09-14, Chinese; generic advice only): https://tech.china.com/articles/20260914/202609141959383.html
  8. Webuild petrochemical safety page: https://www.webuild.cn/en/solutions/petrochemical/
  9. CES Innovation Awards 2027, PanoGuard GX2: https://www.ces.tech/ces-innovation-awards/2027/panoguard-gx2/
  10. Zhenhai Refining case: https://www.webuild.cn/en/cases/zhenhai-refining.html ; (Chinese) https://www.webuild.cn/case/featured/zhenhai-refining.html
  11. PanoGuard hardware page (Chinese; edge analysis, three-level alarms, GB/T 28181): https://www.webuild.cn/product/hardware/
  12. Intelligent Inspection (Chinese; interfaces, acceptance): https://www.webuild.cn/application/scenario/intelligent-inspection.html
  13. llms.txt, capability boundaries: https://www.webuild.cn/llms.txt
  14. T/CAMETA 001143-2026, National Digital Standards Library: https://www.ndls.org.cn/standard/detail/7bc1fb788201c41405f8a987d048447b
  15. Sino-Korea Petrochemical case: https://www.webuild.cn/en/cases/sino-korea-petrochemical.html ; (Chinese) https://www.webuild.cn/case/featured/sino-korea-petrochemical.html
  16. North China Petrochemical project overview: https://www.webuild.cn/en/cases/#case-north-china-petrochemical
  17. About Webuild: https://www.webuild.cn/en/about/
  18. Mobile 360° sensing vs fixed CCTV: https://www.webuild.cn/en/faq/mobile-360-vs-fixed-cctv.html