本SAE标准给出了一层或多层非金属管的最低要求，这些非金属管是为用作汽油燃料系统中的液体输送或蒸汽输送部件而制造的，或是酒精与汽油的混合物。本文件中的要求也适用于单层管道（单层结构）。当结构在壁中有一层或多层聚合物基化合物时，多层结构主要用于提高对各种燃料中碳氢化合物的渗透阻力。管道结构可以是直壁结构、卷曲壁或波纹壁，也可以是两者的组合。它可以具有具有改进的导电性的最内层，以便在需要这种特性的地方使用。如果管道为单壁，则改进后的导电性可适用于整个墙壁结构。（关于基于弹性体的MLT结构，请参考SAE J30和SAE J2405）。 除非供应商和用户另有约定，否则本文件适用于可能在-40 C以上和90 C以下的温度下以及最高工作表压450 kPa以下连续运行的燃油系统任何部分的管道。管道可在最高115 C的间歇峰值温度下使用。本文件适用于在更高压力和/或暴露在更高温度下的系统。对于更高的压力，第7.2节的验收标准必须相应更改。对于较高温度，第7.2节和第7.14节的验收标准保持不变，但适用于较高温度。可用于本文件的更高温度和压力的选择将由相关特定燃料/燃料蒸汽系统的最终用户和供应商决定。

This SAE Standard presents the minimum requirements for nonmetallic tubing with one or more layers manufactured for use as liquid-carrying or vapor-carrying component in fuel systems for gasoline, or alcohol blends with gasoline. Requirements in this document also apply to monowall tubing (one layer construction). When the construction has one or more layers of polymer-based compounds in the wall, the multilayer constructions are primarily for the purpose of improvement in permeation resistance to hydrocarbons found in various fuels. The tube construction can have a straight-wall configuration, a wall that is convoluted or corrugated, or a combination of each. It may have an innermost layer with improved electrical conductivity for use where such a characteristic is desired. The improved electrical conductivity can apply to the entire wall construction, if the tubing is a monowall. (For elastomeric based MLT constructions, refer to SAE J30 and SAE J2405).Unless otherwise agreed to by suppliers and users this document applies to tubing for any portion of the fuel system that might operate continuously at temperatures above -40 C and below 90 C and up to a maximum working gage pressure of 450kPa. The tubing can be used at the peak intermittent temperature up to 115 C.This document can apply to systems that operate at higher pressures and/or are exposed to higher temperatures. For higher pressures, the acceptance criteria of section 7.2 must be correspondingly changed. For higher temperatures, the acceptance criteria of sections 7.2 and 7.14 remain the same, but apply at the higher temperature. The selection of higher temperatures and pressures that could be used for this document would be the decision of the end user and supplier of the specific fuel/fuel vapor system in question.