QJ 1392A-2005 in English

1 Scope

This standard specifies the site requirements, equipment requirements, preparation before test, specimen assembly, procedures and data processing methods in the internal-pressure test for the chamber case of solid rocket motor.

This standard is applicable to hydraulic test, hydraulic burst test and positive pressure airtightness test of chamber case ("case" for short) of solid rocket motor ("motor" for short).

2 Normative references

The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.

GB/T 254 Semi-refined paraffin wax
GB 446 Fully refined paraffin wax
GB/T 678 Chemical reagent - Ethanol
GB/T 1227 Accurate pressure gauge
GB 1790 Medicinal vaseline
GB/T 6026 Acetone for industrial use
QJ 1275 Evaluation of uncertainty in measurement of solid rocket motor
QJ 2472.2 General technical specifications for lifting device—Cord lifting device
HG/T 2492 Ethyl-ɑ-cyanoacrylate instantaneous adhesives

3 Test site requirements

3.1 Test site requirements for hydrostatic test and hydraulic burst test

3.1.1 General

Generally, the test site shall have independent test bay, isolating operation room and test operation room.

3.1.2 Test bay

The test bay shall meet the following requirements:

a) It shall have observation, ventilation, lighting, power supply and other facilities;

b) It shall have enough area and space for assembly, disassembly, turnover and testing;

c) It shall have lifting and turning facilities;

d) The test bay shall be equipped with explosion-proof measures or load-bearing test pits with explosion-proof capability;

e) It shall have a good drainage system and a sewage treatment device according to the actual situation.

3.1.3 Isolating operation room

The isolating operation room shall meet the following requirements:

a) It shall have power supply;

b) It shall have lighting and observation facilities.

3.1.4 Test operation room

The test operation room shall meet the following requirements:

a) Temperature: 10°C to 30°C; relative humidity: ≤80%;

b) There shall be no strong vibration, electromagnetic or other interference;

c) The power supply shall be separated from the power supply of the test bay, with lighting equipment and grounding facilities.

3.2 Test site requirements for positive pressure airtightness test

Test sites shall generally meet the requirements of a), b) and c) in 3.1.2.

Foreword i
1 Scope
2 Normative references
3 Test site requirements
4 Test system composition
5 Test equipment
6 Preparation before test
7 Specimen assembly
8 Test procedures
9 Processing of test data
10 Test report
Annex A (Informative) Formula of wax sealing ingredients
Annex B (Informative) Record tables formats