GB/T 7129-2001Rubber or plastics hoses -- Determination of volumetric expansion (English PDF)

Foreword

This Standard is identical to the international standard ISO 6801:1983 "Rubber

or plastics hoses - Determination of volumetric expansion". This Standard is a

revision of the national standard GB/T 7129-1986 "Determination of volumetric

expansion of rubber hose for automotive hydraulic brake system".

The main differences between this Standard and GB/T 7129-1986:

- CHANGE the standard name to "Rubber or plastics hoses - Determination

of volumetric expansion";

- Expand the scope of application of the standard;

- According to the requirements of National Technical Committee 35 on

Rubber and Rubber Products of Standardization Administration of China,

add a safety statement before the main text;

- In clause 2, add the introduction according to GB/T 1.1.

This Standard, from the date of implementation, replaces GB/T 7129-1986.

This Standard was proposed by State Bureau of Petroleum and Chemical

Industry.

This Standard shall be under the jurisdiction of Subcommittee 1 on Hoses,

National Technical Committee 35 on Rubber and Rubber Products of

Standardization Administration of China.

Drafting organization of this Standard: Nanjing No.7425 Factory.

Main drafters of this Standard: Sun Kejian, Wang Liping.

This Standard was first issued on December 30, 1986.

Rubber or plastics hoses - Determination of

volumetric expansion

Warning: Personnel, who use this Standard, shall be familiar with formal

laboratory procedures. This Standard is not intended to involve all safety

problems that may arise from the use of this Standard. It is the user's

responsibility to formulate corresponding safety and health systems and

ensure compliance with national regulations.

0 Introduction

When used for dispensing specific volumes of fluids, the volumetric capacity of

a hose is often required to vary by only small amounts at the dispensing

pressure. This Standard describes a method of checking that such

requirements can be met.

1 Scope

This Standard specifies a method for the determination of the volumetric

expansion of rubber or plastics hoses under hydrostatic pressure.

This Standard does not specify the dimensions of the test piece and the test

pressure(s) as each of which will be specified in the appropriate product

specification.

2 Reference

The following standard contains provisions which, through reference in this

Standard, constitute provisions of this Standard. At the time of publication of

this Standard, the editions indicated are valid. All standards are subject to

revision. The parties who are using this Standard shall explore the possibility of

using the latest edition of the following standard.

GB/T 5563-1994 Rubber and plastics hoses and hose assemblies -

Hydrostatic testing.

3 Apparatus