SIST EN 14595:2016

Overview - EN 14595:2016 (Breather device for tank transport)

EN 14595:2016 is a CEN European Standard for breather devices used on tanks for the transport of dangerous goods. It defines the performance requirements, critical dimensions and test procedures for breather (pressure/vacuum) devices fitted to tanks carrying liquid petroleum products and other ADR Class 3 substances with vapour pressure ≤ 110 kPa (absolute) at 50 °C (including petrol), excluding toxic or corrosive sub‑classifications. The standard ensures safe breathing, venting and spill prevention under normal and upset conditions.

Key topics and technical requirements

• Functions: provides pressure and vacuum breathing, may provide venting, and must prevent spillage in the event of tank overturn.
• Design:
  • Breathers must be re‑sealing type and resist unauthorized adjustment of relieving pressures.
  • Devices can be combined or separate; discrete internal devices require secondary positive security.
  • Threads (if used) to conform to EN ISO 228‑1.
  • Ingress protection requirement: IP31 (EN 60529).
  • Pressure relief: maximum above‑atmosphere relieving pressure not greater than 12 kPa (gauge).
  • Flow capacity: defined as air flow (m3/h at 20 °C) measured at:
    • pressure flow capacity: 30 kPa above the relieving pressure;
    • vacuum flow capacity: 3 kPa below the vacuum relieving pressure.
  • Material declarations: manufacturer must supply materials in contact with transported substances.
  • Electrical resistance and temperature range requirements are specified in the standard.
• Tests:
  • Two classes: production tests (sampling per ISO 2859‑1) and type tests.
  • Key tests include seat tightness, overturn seat tightness (90°, 180°, 270°), and a drop test (Annex A); procedures reference EN 12266‑1.
  • Test fluids normally air or suitable gas; test records must be retained per the standard.

Practical applications and users

Who uses EN 14595:2016:

• Tank equipment manufacturers designing breather and pressure/vacuum relief devices.
• Tank manufacturers and vehicle integrators specifying service equipment for ADR Class 3 tanks.
• Test laboratories performing production and type testing to demonstrate compliance.
• Owners/operators and maintenance teams applying installation, inspection and maintenance instructions.

Why it matters:

• Ensures safe pressure management of tank compartments during loading, transport and unloading.
• Reduces risk of overpressure/vacuum damage and product loss during overturn or accidental conditions.
• Supports regulatory compliance for tanks transporting flammable liquids under ADR.

Related standards

• EN 16522 - flame arrestors for breather devices (when required)
• EN 12266‑1 - testing procedures for metallic valves (referenced for test methods)
• EN 14564 - terminology for tanks for transport of dangerous goods
• Other service equipment standards in the EN programme (e.g., vapour transfer valves, footvalves, manhole covers)

Keywords: EN 14595:2016, breather device, pressure and vacuum breather, tanks for transport of dangerous goods, ADR Class 3, pressure relief, flow capacity, seat tightness test, overturn test, IP31.