ISO 7840 Small craft—Fire-resistant fuel hoses
ISO 7840 小型船舶 耐火燃油软管

ISO 7840小型船舶 耐火燃油软管 – 适用范围
本国际标准规定了用于输送汽油或汽油与乙醇和柴油混合燃料或柴油与FAME混合的耐火软管的一般要求和物理试验，其设计工作压力不超过0.34 MPa，适用于内径小于等于10 mm和0.25 MPa，以及内径不超过63 mm的软管，船体长度不超过24 m。

本标准适用于艇内装有永久固定燃油系统的小艇所用的软管,不适用于完全位于艇艉井内并与舷外机直接连接的小艇所用的软管。

非耐火燃料软管规范见ISO 8469。永久安装的燃油系统规范见ISO 10088。

This International Standard specifies general requirements and physical tests for fire-resistant hoses for conveying petrol or petrol blended with ethanol and diesel fuel or diesel fuel blended with FAME, designed for a working pressure not exceeding 0,34 MPa for hoses with nominal bore up to and including 10 mm and 0.25 MPa for hoses up to 63 mm inner diameter in craft of hull length up to 24 m.

It applies to hoses for small craft with permanently installed fuel systems. It does not apply to hoses entirely within the splash well at the stern of the craft connected directly to an outboard engine.

Specifications for non-fire-resistant fuel hoses are given in ISO 84691.Specifications for permanently installed fuel systems are given in ISO 10088.

ISO 7840小型船舶 耐火燃油软管 – 原理
装有庚烷的软管着火。在托盘中的燃料点燃后，软管应能承受2.5分钟的试验而无泄漏。
The hose filled with heptane is subjected to fire. The hose shall withstand the test for 2.5 min without leakage after ignition of the fuel in the tray.

ISO 7840小型船舶 耐火燃油软管 – 样品要求
至少应依次测试三个软管样品。
At least three hose samples shall be tested in turn.

ISO 7840小型船舶 耐火燃油软管 – 相关标准
ISO 1307 一般工业用途的橡胶和塑料软管 内径及其公差和长度公差
ISO 1402 橡胶和塑料软管及软管组合件 液压试验
ISO 1817 硫化橡胶耐液体测定方法
ISO 7233 橡胶和塑料软管及软管组合件 真空性能的测定
ISO 7326 橡胶和塑料软管 静态条件下耐臭氧性能的评定
ISO 10088 小艇 永久性安装的燃油系统和固定式燃油柜