Name: ISO 11105:2020 — Small craft — Ventilation of petrol engine and/or petrol tank compartments
SKU: ISO 11105:2020
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ISO 11105:2020 PDF — Small craft — Ventilation of petrol engine and/or petrol tank compart… — GOST Standards

Scope & definitions: Applies to permanently installed petrol engines, petrol tanks and portable fuel tank storage on small craft; net compartment volume is used for calculations.
Compartment separation: Compartments containing petrol engines or tanks must be separated from habitable spaces with continuously sealed boundaries and sealed penetrations.
Natural ventilation (Clause 5):
- Requires both an intake and an exhaust opening/duct to atmosphere unless the compartment is open to the atmosphere.
- Exhaust openings shall originate in the lower one‑third of the compartment and be above normal bilge water.
- Minimum combined internal cross‑sectional area A is calculated by: A = 3300 · ln(V / 0.14) (A in mm²; V = net compartment volume in m³).
- Intake and exhaust openings should be separated by at least 600 mm where compartment dimensions permit.
- Minimum duct cross‑sections: 1 134 mm² for petrol tank compartments and 3 161 mm² for petrol engine compartments.
Powered ventilation (Clause 6):
- Each compartment with a permanently installed petrol engine requires an exhaust blower system.
- At least one powered blower per propulsion engine; multiple blowers must operate simultaneously.
- Minimum blower capacity q_r depends on compartment volume V:
  - V < 1 m³: q = 1.5 m³/min
  - 1 ≤ V ≤ 3 m³: q = 1.5 × V (m³/min)
  - V > 3 m³: q = 0.5 × V + 3 (m³/min)
- Blower installation: intake in lower one‑third, self‑draining ducts, separated from natural ventilation ducts by ~600 mm where possible; intake/exhaust separation inside compartment ≥ 380 mm.
- Blowers must have dedicated overcurrent protection; visual power indicator at each blower switch; blower must not be auto‑activated by vapor detector.
- Blower rating test per Annex A: break‑in at 120% nominal voltage for 3 h, test at nominal voltage, correct airflow to standard density 1.2 kg/m³ and produce performance curve.
Safety & marking:
- Only ignition‑protected equipment (ISO 8846) in petrol compartments.
- Label near the ignition switch: “Operate blower for 4 min before starting engine” (symbols per ISO 11192).

ISO 11105:2020 PDF

Abstract

Overview

Похожие стандарты

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 8846:1990

Small craft — Electrical devices — Protection against ignition of surrounding flammable gases

ISO 10088:2013

Small craft — Permanently installed fuel systems

ISO 11192:2005

Small craft — Graphical symbols

ISO 8666:2016

Small craft — Principal data

SIST EN ISO 8846:2026

Small craft - Electrical devices - Protection against ignition of surrounding flammable gases (ISO 8846:2025)

SIST EN ISO 11192:2018

Small craft - Graphical symbols (ISO 11192:2005)