Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
GJB 150 consists of the following 28 parts under the general title Laboratory environmental test methods for military materiel:
a) Part 1: General requirements;
b) Part 2: Low pressure (altitude) test;
c) Part 3: High temperature test;
d) Part 4: Low temperature test;
e) Part 5: Temperature shock test;
f) Part 7: Solar radiation test;
g) Part 8: Rain test;
h) Part 9: Damp heat test;
i) Part 10: Fungus test;
j) Part 11: Salt fog test;
k) Part 12: Sand and dust test;
l) Part 13: Explosive atmosphere test;
m) Part 14: Immersion test;
n) Part 15: Acceleration test;
o) Part 16: Vibration test;
p) Part 17: Acoustic noise test;
q) Part 18: Shock test;
r) Part 20: Gunfire vibration test;
s) Part 21: Wind pressure test;
t) Part 22: Icing/freezing rain test;
u) Part 23: Motions and inclinations test;
v) Part 24: Temperature-humidity-vibration-altitude test;
w) Part 25: Vibro-acoustic/temperature test;
x) Part 26: Contamination by fluids test;
y) Part 27: Pyroshock test;
z) Part 28: Acidic atmosphere test;
aa) Part 29: Ballistic shock test;
bb) Part 30: Ship shock test.
This is Part 2 of GJB 150, which replaces GJB 150.2-1986 Environmental test methods for military equipments - Low pressure (altitude) test.
The following main changes have been made with respect to GJB 150.2-1986 (the previous edition):
a) the Clause “Test conditions" in GJB 150.2-1986 is deleted, and the tailoring guidelines for determining test methods, test sequences, test procedures and test conditions are added;
b) the requirements for test information are added;
c) the explosive decompression test procedures are added;
d) the pressure rate of change of rapid decompression is increased;
e) the test altitude is extended to 30,000m.
This part was proposed by the Electronic Information Base Department of the General Armaments Department of the PLA.
The previous edition of this part is as follows:
GJB 150.2-1986.
Laboratory environmental test methods for military materiel - Part 2: Low pressure (altitude) test
1 Scope
This part specifies the purpose and application, tailoring guidelines, information requirements, test requirements, test procedures and result analysis of low pressure (altitude) test carried out in military materiel laboratory.
This part is applicable to the low pressure (altitude) test for military materiel.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part. For dated reference, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this part. However parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references or references with version not indicated, the latest edition of the normative document referred to applies.
GJB 150.1A-2009 Laboratory environmental test methods for military materiel - Part 1: General requirements
GJB 150.3A-2009 Laboratory environmental test methods for military materiel - Part 3: High temperature test
GJB 150.24A-2009 Laboratory environmental test methods for military materiel - Part 24: Temperature-humidity-vibration-altitude test
GJB 4239 General requirements for equipment environmental engineering
3 Purpose and application
3.1 Purpose
This test is intended to determine whether the materiel can:
a) withstand low pressure environment;
b) operate normally in a low pressure environment;
c) withstand the rapid change of air pressure under nature temperature conditions.
3.2 Application
This test is applicable to:
a) materiel stored/operated at high altitude;
b) materiel transported or operated in pressurized or non-pressurized cabin of aircraft (GJB 150.24A-2009 may also be used for evaluation).
c) materiel exposed to rapid decompression or explosive decompression environment. Whether the failure of materiel exposed to this environment will damage its platform or cause personal injury shall be determined.
d) materiel flying outside the aircraft.
3.3 Restriction
This test is not applicable to the materiel installed or operated on spacecrafts, aircrafts or missiles with flight altitude exceeding 30,000m.
4 Tailoring guidelines
4.1 Selection of test methods
4.1.1 General
Analyze the requirements of relevant technical documents, apply the results obtained by implementing GJB 4239 in the ordering process of military materiel (products), determine the stage of low pressure environment in the service life of military materiel, and determine whether this test is necessary according to the following environmental effects. When it is necessary to carried out this test through determination and the same specimen is used for this test and other environmental tests, the sequence of this test and other tests shall also be determined.
4.1.2 Environmental effects
4.1.2.1 General
In addition to the heat effect (see GJB 150.3A-2009), the typical effects specified in 4.1.2.2 and 4.1.2.3 shall also be considered to help determine whether this test is applicable to the materiel under test.
4.1.2.2 Physical and chemical effects
Low pressure environment may cause the following physical and chemical effects on the materiel (products):
a) air and liquid leakage of the shell sealed by the gasket;
b) deformation, damage or rupture of the sealed container;
c) change in physical and chemical properties of low-density materials;
d) overheating of materiel due to reduced heat conduction;
e) evaporation of lubricant;
f) unstable starting and operating of the engine;
g) failure of vacuum seal.
4.1.2.3 Electrical effects
Materiel failure or unstable operation caused by arc or corona discharge.
4.1.3 Selection of test sequence
4.1.3.1 General
See GJB 150.1A-2009, 3.6.
4.1.3.2 Special requirements
Generally, this test shall be carried out at the early stage of the test sequence. If other tests may have a great influence on the low pressure test results of the materiel (see 4.1.2), this test may be carried out after these tests. For example, low temperature and high temperature tests may affect sealing; mechanical environment test may affect the integrity of materiel structure; aging of non-metal parts and components may reduce their strength.
4.2 Selection of test procedures
4.2.1 General
This test includes four low pressure test procedures: Procedure I - storage/air transportation, Procedure II - operation/external captive-flight, Procedure III - rapid decompression and Procedure IV - explosive decompression. The test procedures or test procedure combinations shall be determined according to the requirements of relevant documents.
Foreword i
1 Scope
2 Normative references
3 Purpose and application
4 Deleting guidelines
5 Information requirements
6 Test requirements
7 Test procedures
8 Result analysis
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
GJB 150 consists of the following 28 parts under the general title Laboratory environmental test methods for military materiel:
a) Part 1: General requirements;
b) Part 2: Low pressure (altitude) test;
c) Part 3: High temperature test;
d) Part 4: Low temperature test;
e) Part 5: Temperature shock test;
f) Part 7: Solar radiation test;
g) Part 8: Rain test;
h) Part 9: Damp heat test;
i) Part 10: Fungus test;
j) Part 11: Salt fog test;
k) Part 12: Sand and dust test;
l) Part 13: Explosive atmosphere test;
m) Part 14: Immersion test;
n) Part 15: Acceleration test;
o) Part 16: Vibration test;
p) Part 17: Acoustic noise test;
q) Part 18: Shock test;
r) Part 20: Gunfire vibration test;
s) Part 21: Wind pressure test;
t) Part 22: Icing/freezing rain test;
u) Part 23: Motions and inclinations test;
v) Part 24: Temperature-humidity-vibration-altitude test;
w) Part 25: Vibro-acoustic/temperature test;
x) Part 26: Contamination by fluids test;
y) Part 27: Pyroshock test;
z) Part 28: Acidic atmosphere test;
aa) Part 29: Ballistic shock test;
bb) Part 30: Ship shock test.
This is Part 2 of GJB 150, which replaces GJB 150.2-1986 Environmental test methods for military equipments - Low pressure (altitude) test.
The following main changes have been made with respect to GJB 150.2-1986 (the previous edition):
a) the Clause “Test conditions" in GJB 150.2-1986 is deleted, and the tailoring guidelines for determining test methods, test sequences, test procedures and test conditions are added;
b) the requirements for test information are added;
c) the explosive decompression test procedures are added;
d) the pressure rate of change of rapid decompression is increased;
e) the test altitude is extended to 30,000m.
This part was proposed by the Electronic Information Base Department of the General Armaments Department of the PLA.
The previous edition of this part is as follows:
GJB 150.2-1986.
Laboratory environmental test methods for military materiel - Part 2: Low pressure (altitude) test
1 Scope
This part specifies the purpose and application, tailoring guidelines, information requirements, test requirements, test procedures and result analysis of low pressure (altitude) test carried out in military materiel laboratory.
This part is applicable to the low pressure (altitude) test for military materiel.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part. For dated reference, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this part. However parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references or references with version not indicated, the latest edition of the normative document referred to applies.
GJB 150.1A-2009 Laboratory environmental test methods for military materiel - Part 1: General requirements
GJB 150.3A-2009 Laboratory environmental test methods for military materiel - Part 3: High temperature test
GJB 150.24A-2009 Laboratory environmental test methods for military materiel - Part 24: Temperature-humidity-vibration-altitude test
GJB 4239 General requirements for equipment environmental engineering
3 Purpose and application
3.1 Purpose
This test is intended to determine whether the materiel can:
a) withstand low pressure environment;
b) operate normally in a low pressure environment;
c) withstand the rapid change of air pressure under nature temperature conditions.
3.2 Application
This test is applicable to:
a) materiel stored/operated at high altitude;
b) materiel transported or operated in pressurized or non-pressurized cabin of aircraft (GJB 150.24A-2009 may also be used for evaluation).
c) materiel exposed to rapid decompression or explosive decompression environment. Whether the failure of materiel exposed to this environment will damage its platform or cause personal injury shall be determined.
d) materiel flying outside the aircraft.
3.3 Restriction
This test is not applicable to the materiel installed or operated on spacecrafts, aircrafts or missiles with flight altitude exceeding 30,000m.
4 Tailoring guidelines
4.1 Selection of test methods
4.1.1 General
Analyze the requirements of relevant technical documents, apply the results obtained by implementing GJB 4239 in the ordering process of military materiel (products), determine the stage of low pressure environment in the service life of military materiel, and determine whether this test is necessary according to the following environmental effects. When it is necessary to carried out this test through determination and the same specimen is used for this test and other environmental tests, the sequence of this test and other tests shall also be determined.
4.1.2 Environmental effects
4.1.2.1 General
In addition to the heat effect (see GJB 150.3A-2009), the typical effects specified in 4.1.2.2 and 4.1.2.3 shall also be considered to help determine whether this test is applicable to the materiel under test.
4.1.2.2 Physical and chemical effects
Low pressure environment may cause the following physical and chemical effects on the materiel (products):
a) air and liquid leakage of the shell sealed by the gasket;
b) deformation, damage or rupture of the sealed container;
c) change in physical and chemical properties of low-density materials;
d) overheating of materiel due to reduced heat conduction;
e) evaporation of lubricant;
f) unstable starting and operating of the engine;
g) failure of vacuum seal.
4.1.2.3 Electrical effects
Materiel failure or unstable operation caused by arc or corona discharge.
4.1.3 Selection of test sequence
4.1.3.1 General
See GJB 150.1A-2009, 3.6.
4.1.3.2 Special requirements
Generally, this test shall be carried out at the early stage of the test sequence. If other tests may have a great influence on the low pressure test results of the materiel (see 4.1.2), this test may be carried out after these tests. For example, low temperature and high temperature tests may affect sealing; mechanical environment test may affect the integrity of materiel structure; aging of non-metal parts and components may reduce their strength.
4.2 Selection of test procedures
4.2.1 General
This test includes four low pressure test procedures: Procedure I - storage/air transportation, Procedure II - operation/external captive-flight, Procedure III - rapid decompression and Procedure IV - explosive decompression. The test procedures or test procedure combinations shall be determined according to the requirements of relevant documents.
Contents of GJB 150.2A-2009
Foreword i
1 Scope
2 Normative references
3 Purpose and application
4 Deleting guidelines
5 Information requirements
6 Test requirements
7 Test procedures
8 Result analysis
