Gas Under Pressure Sign

Gas Under Pressure Sign – ISO 7010 Warning Symbol HS0032

This Gas Under Pressure sign warns crew and contractors that a pressurised gas system nearby can rupture or ignite if mishandled, damaged or exposed to heat. This sign combines the standard bursting-cylinder pictogram with a bold “DANGER – Gas under pressure” text panel beneath it, pairing the instant visual cue with an explicit written instruction. As SKU HS0032 in the Hazard Signs range, it is built for continuous marine exposure and suits compressed air systems, gas cylinder manifolds, pneumatic control lines and pressurised gas storage areas.

The upper pictogram shows a cylinder venting a burst of fragments alongside a small flame, while the lower panel spells out “DANGER” in bold capitals followed by “Gas under pressure” in smaller text, a combined format useful where an explicit English instruction adds clarity beyond the pictogram alone for crew, contractors and visiting surveyors of varying backgrounds.

Because a gas under pressure hazard is not visible from the outside of a pipe or cylinder casing, the wording reinforces exactly what the pictogram implies, reminding anyone nearby to avoid impact, heat and unauthorised valve operation. The photoluminescent base keeps the gas under pressure warning visible for a period after lighting fails, relevant in machinery spaces where pressurised systems remain live during a power interruption.

Why Gas Under Pressure Marking Matters

A failure in a system carrying gas under pressure can release energy violently, causing projectile fragments, fire or asphyxiation depending on the gas involved, so clear marking at every relevant manifold and pipe run is an essential low-cost control.

Standardised signage supports the vessel’s permit-to-work and isolation procedures for maintenance on pressurised systems, and the combined wording format on this sign helps ensure the specific hazard is understood rather than assumed from a generic caution symbol. It also gives contractors bringing tools or hot work equipment an immediate warning to check isolation status before starting.

Compliance and Certification

This sign is produced to align with IMO shipboard safety signage guidance and the combined pictogram-and-text warning format referenced in pressurised system safety practice aboard vessels, supporting the ISM Code’s requirement for documented control of pressure hazards. A visible gas under pressure warning at manifolds and pipe runs is a documented control that classification surveyors and Port State Control officers look for when reviewing a vessel’s pressurised systems safety arrangements.

Installation Recommendations

Mount the sign directly on or beside the pressurised system component, at a height that is seen before valve operation or maintenance work begins, using the pre-drilled fixing holes with marine-grade fasteners for exterior deck fittings and the self-adhesive backing for interior pipe runs and control panels. Check the sign during pressure system inspections to confirm it remains legible and correctly positioned relative to the current pipework layout, particularly after any modification work on the system it is marking.

• 425 x 567mm rigid or self-adhesive format for steel, aluminium or GRP surfaces
• Photoluminescent base for visibility during power loss or blackout drills
• UV-stable, saltwater-resistant construction for long-term exterior exposure
• Self-adhesive or pre-drilled fixing options for fast, secure installation
• Combined pictogram and bold English text for added clarity beyond the symbol alone

Order the HS0032 Gas Under Pressure sign today to mark every manifold and pipe run before your next pressurised systems audit. Safety Sign Hub stocks the complete IMPA/ISSA-coded hazard sign range and ships marine-grade signage across Australia and to vessels in port, with bulk pricing for fleet orders.

See the full Hazard Signs range for related ISO 7010 warning pictograms, or browse our Fire Fighting Signs for IMO A.654(16) fire control signage to complete your vessel’s safety signage plan.