QC/T 624-2022Rubber plugs (English PDF)

Foreword

This document was drafted, in accordance with GB/T 1.1-2020 "Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents".

This document replaces QC/T 624-2013. Compared with QC/T 624-2013, the main technical changes are as follows, except editorial changes:

- ADD type-A rubber plug specifications d = 14, d = 18, d = 22, d = 60 (see Table 1);

- ADD the d, d1 nominal value and limit deviation of type-A rubber plug (see Table 1);

- ADD the nominal values and limit deviations of a4, a5, b4, b5 of type-B rubber plug (see Table 1);

- ADD the requirements for size inspection (see Table 3);

- ADD the EPDM materials and basic requirements (see Table 3);

- ADD the provisions on aging performance (see Table 3);

- ADD the provisions on structural requirements (see Table 3);

- ADD the combustion characteristics requirements (see Table 3);

- ADD the requirements for prohibited substances (see Table 3);

- ADD the provisions on acceptance quality limit (AQL) (see 5.4).

1 Scope

This document specifies the type and size, technical requirements, test methods of type- A rubber plug and type-B rubber plug.

This document is applicable to the type-A rubber plugs for automobiles, which have a diameter D0 of thin-walled circular holes ranging from 12 mm to 60 mm.

This document is applicable to the type-B rubber plugs for automobiles, which have thin-walled rectangular holes size of 8 mm x l4 mm ~ 25 mm x 31 mm.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, for dated references, only the version corresponding to the date is applicable to this document; for undated references, the latest version (including all amendments) is applicable to this document.

GB/T 90.1-2002 Fasteners - Acceptance inspection

GB/T 90.2-2002 Fasteners - Marking and packaging

GB/T 531.1-2008 Rubber vulcanized or thermoplastic - Determination of indentation hardness - Part 1: Durometer method (Shore hardness)

GB/T 3672.1-2002 Rubber - Tolerances of products - Part 1: Dimensional tolerances

GB 8410 Flammability of automotive interior materials

GB/T 30512 Requirements for prohibited substances on automobiles

HG/T 2196 Standard classification system for rubber products in automotive application

HG/T 3090 General rules of visual quality for molded and extruded rubber products

QC/T 268 Extreme deviation for undeclared tolerance size of processing parts for automobile cold stamping

QC/T 326 Coding rules for automotive standardized parts […]