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GJB 325A-2021

Nomenclature rules for composite solid propellants (English Version)

GJB 325A-2021
Standard No.
GJB 325A-2021
Language
Chinese, Available in English version
Release Date
2021
Published By
Military Standard of the People's Republic of China-General Armament Department
Latest
GJB 325A-2021
Introduction

Background of Standard Revision and Technological Evolution

As an upgraded version of the 1987 version of the standard, GJB 325A-2021 reflects the important development of binder systems and oxidizer combinations in the field of composite solid propellant technology in my country. The main technological evolution is reflected in:

Comparison dimensions GJB 325-1987 GJB 325A-2021
Binder categories 4 categories 7 categories (newly added azide propellants, etc.)
Code structure Two-level numbering Three-level numbering (adding modification serial number)
Characteristic components 3 standard combinations 5 standard combinations + other categories

Detailed explanation of core naming rules

4.1 Naming structure

The standard stipulates that the propellant code adopts the three-section structure of A-BC-DE:

  1. Category code A: Corresponding to binder system, numbers (such as 404) or abbreviations (such as PEG) can be used
  2. Differentiation code BC: B is the development unit number (see Table 2), C is the characteristic component code (see Table 3)
  3. Development sequence DE: D is the formula sequence number, E is the modification mark (AZ)

Application case:

A research institute developed a binder system.

Numerical code Binder type Typical application
404 Polyether Tactical missile booster
413 Azide High-energy solid rocket
410 Hydroxybutyl Booster stage of launch vehicle

Suggestions for the implementation of the standard

5.1 Naming management process

  1. Application stage: Formulation designers submit naming application forms containing technical parameters
  2. Approval stage: The competent department of the unit verifies the matching of components
  3. Registration stage: Establish an internal formula code database

Handling of common problems

  • Retrofit determination: When the burning rate regulator content changes by more than 5%, the retrofit serial number needs to be activated
  • Cross-unit collaboration: The leading research and development unit uses "0" as the first character of the second paragraph

GJB 325A-2021 history

  • 2021 GJB 325A-2021 Nomenclature rules for composite solid propellants
  • 1987 GJB 325-1987 Nomenclature rules for composite solid propellants



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