This technical guidance document establishes a unified guideline for determining the degree of external leakage in hydraulic systems. The selection of the classification stipulates that the leakage status of the hose joints should be judged by visual inspection rather than by instruments. Since the leakage status may change over a period of time, this technical guidance document describes the leakage status during the observation period. GB/Z 18427-2001 Hydraulic hose assembly Hydraulic system external leakage classification GB/Z18427-2001 standard download decompression password: www.bzxz.net

GB/Z18427--2001
This guidance technical document is equivalent to the international standard ISO/TR11340:1994 "Hydraulic hose assemblies-Classification of external leakage of hydraulic systems".
The purpose of formulating this guidance technical document is to propose a classification for the leakage of the pipe joints of hydraulic hose assemblies for reference by relevant personnel in scientific research, design, production, use and management. This guidance technical document is for reference only. For suggestions and opinions on this guidance technical document, please report to the standardization administrative department of the State Council.
This guidance technical document is proposed by the State Administration of Petroleum and Chemical Industry. This guidance technical document is under the jurisdiction of the Hose Sub-Technical Committee of the National Technical Committee for Standardization of Rubber and Rubber Products. The drafting unit of this guidance technical document: Shenyang Rubber Research and Design Institute of China Rubber Group. The main drafter of this guidance technical document: Luo Li. 232
GB/Z 18427—2001
ISO Foreword
The International Organization for Standardization (ISO) is a worldwide federation of national standards bodies (ISO member bodies). The work of formulating international standards is usually carried out by ISO technical committees. Any member body interested in a project for which a technical committee has been established has the right to participate in the committee. International organizations, both governmental and non-governmental, that have ties with ISO may also participate in this work. ISO works closely with the International Electrotechnical Commission (IEC) in all aspects of electrotechnical standardization. The main task of the technical committee is to formulate international standards. In special circumstances, the technical committee may recommend the publication of one of the following types of technical reports.
Type 1: When, despite repeated efforts, it still cannot get the support it needs as an international standard; Type 2: When the project is still in the technical development stage or, for any other reason, is promising but cannot immediately form an international standard; Type 3: When the technical committee collects data that is different from the data that is usually published as an international standard (for example, "statement of the process").
Type 1 and Type 2 technical reports are subject to review within three years of publication to determine whether they should be converted into international standards. Type 3 technical reports do not need to be reviewed until the data they provide is no longer valid or useful. ISO/TR11340 is a Type 3 technical report. It was prepared by ISO/TC45 Rubber and Rubber Products Technical Committee, SC1 Hose (Rubber and Plastics) Subcommittee.
National Standardization Guidance Technical Document of the People's Republic of China Hydraulic Hose Assemblies
Hydraulic System External Leakage Classification
Hydraulic hose assemblies-External leakage classification for hydraulic systemsGB/Z18427—2001
idt ISO/TR 11340:1994
This guidance technical document establishes a unified guide for determining the degree of external leakage in hydraulic systems. The selection of the classification is specified to judge the leakage status of the hose joint by visual inspection rather than with the help of instruments. Given that the leakage status may change over a period of time, this guidance document describes the leakage status during the observation period. 2 Classification
The classification is listed in Table 1 and illustrated in Figure 1.
Table 1 Leakage classificationbzxz.net
No signs of moisture
No fluid appears
Fluid appears but no drops are formed
Fluid appears to form drops without dripping
Fluid appears to form drops and drip
Frequency of fluid drops forms a noticeable flowApproved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on August 28, 2001231
Implemented on May 1, 2002
GB/Z18427--2001
Figure 1 Hydraulic hose assembly Hydraulic system external leakage classification diagram 235
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