"This standard covers flexible hose assemblies with metal fittings (hereinafter referred to as ""hose assembly"") used at normal working temperatures ranging from -30 to 100??or -30 to 130??under working pressures up to 0.98MPa in the air brake systems and related sub-systems installed on automobiles. This standard also covers the hose assemblies used in air-over hydraulic brake systems. Remarks 1. This standard does not cover the hoses with couplings used to join the brake system of a truck tractor and that of a trailer. However@ this standard should preferably be applied to these hoses except for the characteristics special to them. 2. The hoses with DOT mark conforming to this standard will also meet the requirements specified in FMVSS NO. 106 (Brake Hoses) and is the inside diameter of the hose indicated by meter. Also@ the hoses with CCC mark have been authorized by Chinese certification organization. 3. In this standard@ the following terms are defined as follows (See ""Power steering hoses and power steering hose assemblies - ISD-V01-502Y"") : a. Hose : Rubber hose section of a hose assembly composed of rubber layers and a reinforcement layer b. Metal Fitting : Coupling section of a hose assembly composed of two portions ; an end fitting and a metal crimp c. Hose Assembly : Assembly composed of a hose and metal fittings together with spring protector as required."