Detailed visual inspection of vessel internals, storage tank shells, column internals, duct systems, and complex confined geometries — without personnel entry, without the confined space permit-to-work burden, and without the physiological and atmospheric risk that conventional internal inspection demands.
Entry into confined spaces is
among the highest-risk activities in industrial inspection. Permit-to-work
requirements, standby and rescue resource, continuous atmospheric monitoring,
and the physiological limitations of personnel in confined environments
compound to make internal inspection of vessels, tanks, columns, and
large-diameter pipelines both hazardous and expensive — particularly where the
inspection objective is a preliminary condition assessment that may not
ultimately require entry at all.
Collision-tolerant UAV platforms
specifically designed for internal and confined space deployment carry
omnidirectional lighting systems and high-resolution cameras capable of
navigating the complete internal geometry of pressure vessels, storage tanks, column
shells, duct systems, and interconnected confined spaces. Detailed visual
evidence of internal corrosion, coating condition, lining integrity, weld
condition, and structural damage is captured without any personnel entering the
confined space.
For assets where gas-freeing is
incomplete, temperatures remain elevated post-shutdown, or structural
instability makes entry inadvisable, internal drone inspection provides the
only available mechanism for internal visual assessment — and in many cases eliminates
the need for entry entirely.
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Pressure vessel internal
inspection — shell, nozzles, welds, internals
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Above-ground storage tank
internal condition assessment — shell, floor, roof structure, floating roof
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Column and distillation
tower internal inspection
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Duct, flue gas, and exhaust
system internal survey
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Bunded areas, underground
chambers, and pit inspection
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Large-diameter pipeline
internal visual inspection
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Post-repair internal visual
verification before return to service
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Preliminary internal
assessment to determine whether full confined space entry is required
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API 510 — Pressure Vessel
Inspection Code — internal inspection requirements and alternative inspection
methods
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API 653 — Tank Inspection,
Repair, Alteration, and Reconstruction — internal inspection scope
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ASME Section VIII —
Pressure vessel inspection requirements — internal examination scope
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MOM WSH Act (Singapore) —
Confined Space Regulations — applicable to confined space inspection planning
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OSHA 29 CFR 1910.146 —
Permit-required confined spaces — applicable to US-operated facilities
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Client and
operator-specific confined space inspection procedures and alternative method
approvals