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GB/T 24187-2009 English PDF (GBT24187-2009)
GB/T 24187-2009 English PDF (GBT24187-2009)
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GB/T 24187-2009: Cold-drawn precision single welded steel tubes
GB/T 24187-2009
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.75
H 48
Cold-drawn precision single welded steel tubes
ISSUED ON. JUNE 25, 2009
IMPLEMENTED ON. APRIL 01, 2010
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Classification and code ... 6
4 Ordering content ... 7
5 Dimensions, shape, weight and tolerance ... 7
6 Technical requirements ... 10
7 Test methods ... 14
8 Inspection rules ... 15
9 Packaging, marking and quality certificate ... 16
Appendix A (Normative) Bell-mouth test of steel tubes for automotive ... 17
Appendix B (Informative) Requirements for the inner surface of high-cleanliness
steel tubes for refrigeration ... 19
Appendix C (Informative) Steel tube’s outer plating requirements ... 21
Appendix D (Normative) Test method for residues of internal surface
cleanliness ... 23
Cold-drawn precision single welded steel tubes
1 Scope
This standard specifies the classification and code, dimension, shape, weight
and allowable deviation, technical requirements, test methods, inspection rules,
packaging, marking and quality certificates of cold-drawn precision single
welded steel tubes.
This standard is applicable to the cold-drawn precision single welded steel
tubes which are used in the manufacture of condensers, evaporators, fuel pipes,
lubricating oil pipes, electric heating pipes, cooler pipes and general pipe fittings
in such industries as refrigeration, automotive, electric heating and so on
(hereinafter referred to as “steel tube”).
2 Normative references
The provisions in following documents become the provisions of this standard
through reference in this standard. For the dated references, the subsequent
amendments (excluding corrections) or revisions do not apply to this standard;
however, parties who reach an agreement based on this standard are
encouraged to study if the latest versions of these documents are applicable.
For undated references, the latest edition of the referenced document applies.
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 223.3 Methods for chemical analysis of steels and alloys - The
diantipyryl methane phosphomolybdate gravimetric method for the
determination of phosphorus content by
GB/T 223.58 Methods for chemical analysis of steels and alloys - The
sodium arsenite-sodium nitrite titration method for the determination of
manganese content
GB/T 223.59 Iron, steel and alloy - Determination of phosphorus content -
Bismuth phosphomolybdate blue spectrophotometric method and antimony
phosphomolybdate blue spectrophotometric method
GB/T 223.61 Methods for chemical analysis of iron, steel and alloy - The
ammonium phosphomolybdate volumetric method for the determination of
phosphorus content
GB/T 223.62 Methods for chemical analysis of iron, steel and alloy - The
butyl acetate extraction photometric method for the determination of
phosphorus content
GB/T 223.63 Methods for chemical analysis of steels and alloys - The
sodium periodate for the determination of manganese content
GB/T 223.64 Iron, Steel and alloy - Determination of manganese content -
Flame atomic absorption spectrometric method
GB/T 223.67 Iron, steel and alloy - Determination of sulfur content -
Methylene blue spectrophotometric method
GB/T 223.68 Methods for chemical analysis of iron steel and alloy - The
combustion potassium iodate volumetric method for the determination of
sulfur content
GB/T 223.72 Methods for chemical analysis of iron, steel and alloy - The
alumina chromatographic separation-barium sulfate gravimetric method for
the determination of sulfur content
GB/T 223.74 Methods for chemical analysis of iron, steel and alloy - The
combustion gravimetric/gas-volumetric method for the determination of
combined carbon content
GB/T 223.79 Iron and steel - Determination of multi-element contents - X-
ray fluorescence spectrometry (Routine method)
GB/T 228-2002 Metallic materials – Tensile testing at ambient temperature
(eqv ISO 6892.1998)
GB/T 241 Metal materials - Tubes - Hydrostatic pressure test
GB/T 242 Metal materials - Tube - Drift-expending test (GB/T 242-2007, ISO
8493.1998, IDT)
GB/T 244 Metallic materials - Tube - Bend test (GB/T 244-2008, ISO
8491.1998, IDT)
GB/T 246 Metal materials - Tube - Flattening test (GB/T 246-2007, ISO
8492.1998, IDT)
GB/T 2102 Acceptance packing marking and quality certification of steel tube
GB/T 4336 Standard test method for spark discharge atomic emission
spectrometric analysis of carbon and low-alloy steel (Routine method)
GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests (GB/T
10125-1997, eqv ISO 9227.1990)
GB/T 11605 Methods of humidity measurement
GB/T 16488 Water quality - Determination of petroleum oil, animal and
vegetable oils - Infrared photometric method
GB/T 20066 Steel and iron - Sampling and preparation of samples for the
determination of chemical composition (GB/T 20066-2006, ISO 14284.1996,
IDT)
GB/T 20123 Steel and iron - Determination of total carbon and sulfur content
Infrared absorption method after combustion in an induction furnace (routine
method) (GB/T 20123-2006, ISO 15350.2000, IDT)
GB/T 20126 Unalloyed steel - Determination of low carbon content - Part 2.
Infrared absorption method after combustion in an induction furnace (with
preheating) (GB/T 20126-2006, ISO 15349-2.1999, IDT)
3 Classification and code
3.1 Dimensional accuracy
a) Ordinary accuracy, codenamed PA;
b) Advanced accuracy, codenamed PC.
3.2 Mechanical properties
a) Ordinary steel tube, codenamed MA;
b) Soft steel tube, codenamed MB.
3.3 Surface status
The surface status and code of the steel tube are shown in Table 1. According
to the requirements of the purchaser, through negotiation between the supplier
and the purchaser, it may supply the steel tubes of other surface status than
those listed in Table 1.
Where.
W - The theoretical weight per meter of steel tube, in kilograms per meter
(kg/m);
D - The outer diameter of steel tube, in millimeters (mm);
S - The wall thickness of steel tube, in millimeters (mm).
5.4.3 For steel tubes delivered according to theoretical weight, the allowable
deviation of the actual weight of each batch from the theoretical weight shall be
± 7.5%.
5.5 Example of marking
Marking order. dimensional accuracy - specification dimension - mechanical
properties - surface type and plating post-treatment - standard number
Example 1. The soft cold drawn precision single welded steel tubes which are
copper-plated for the use of coil cooling, in ordinary accuracy, outer diameter
4.76 mm, wall thickness 0.50 mm, is marked as follows.
PA-4.76 x 0.50-MB-Cu-GB/T 24187
Example 2. The ordinary cold drawn precision single welded steel tubes which
are passivated into strip-shaped fixed length for automotive use, in advanced
accuracy, outer diameter 8.00 mm, wall thickness 0.70 mm, length 6000 mm,
outer surface galvanized layer thickness in 8 μm, is marked as follows.
PC-8.00 x 0.70 x 6000-MA-Zn 8 D-GB/T 24187
6 Technical requirements
6.1 Cold-rolled steel strip
6.1.1 Chemical composition of steel strip
6.1.1.1 For cold-rolled steel strips for steel tubes, it may use co...
Get QUOTATION in 1-minute: Click GB/T 24187-2009
Historical versions: GB/T 24187-2009
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GB/T 24187-2009: Cold-drawn precision single welded steel tubes
GB/T 24187-2009
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.75
H 48
Cold-drawn precision single welded steel tubes
ISSUED ON. JUNE 25, 2009
IMPLEMENTED ON. APRIL 01, 2010
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Classification and code ... 6
4 Ordering content ... 7
5 Dimensions, shape, weight and tolerance ... 7
6 Technical requirements ... 10
7 Test methods ... 14
8 Inspection rules ... 15
9 Packaging, marking and quality certificate ... 16
Appendix A (Normative) Bell-mouth test of steel tubes for automotive ... 17
Appendix B (Informative) Requirements for the inner surface of high-cleanliness
steel tubes for refrigeration ... 19
Appendix C (Informative) Steel tube’s outer plating requirements ... 21
Appendix D (Normative) Test method for residues of internal surface
cleanliness ... 23
Cold-drawn precision single welded steel tubes
1 Scope
This standard specifies the classification and code, dimension, shape, weight
and allowable deviation, technical requirements, test methods, inspection rules,
packaging, marking and quality certificates of cold-drawn precision single
welded steel tubes.
This standard is applicable to the cold-drawn precision single welded steel
tubes which are used in the manufacture of condensers, evaporators, fuel pipes,
lubricating oil pipes, electric heating pipes, cooler pipes and general pipe fittings
in such industries as refrigeration, automotive, electric heating and so on
(hereinafter referred to as “steel tube”).
2 Normative references
The provisions in following documents become the provisions of this standard
through reference in this standard. For the dated references, the subsequent
amendments (excluding corrections) or revisions do not apply to this standard;
however, parties who reach an agreement based on this standard are
encouraged to study if the latest versions of these documents are applicable.
For undated references, the latest edition of the referenced document applies.
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 223.3 Methods for chemical analysis of steels and alloys - The
diantipyryl methane phosphomolybdate gravimetric method for the
determination of phosphorus content by
GB/T 223.58 Methods for chemical analysis of steels and alloys - The
sodium arsenite-sodium nitrite titration method for the determination of
manganese content
GB/T 223.59 Iron, steel and alloy - Determination of phosphorus content -
Bismuth phosphomolybdate blue spectrophotometric method and antimony
phosphomolybdate blue spectrophotometric method
GB/T 223.61 Methods for chemical analysis of iron, steel and alloy - The
ammonium phosphomolybdate volumetric method for the determination of
phosphorus content
GB/T 223.62 Methods for chemical analysis of iron, steel and alloy - The
butyl acetate extraction photometric method for the determination of
phosphorus content
GB/T 223.63 Methods for chemical analysis of steels and alloys - The
sodium periodate for the determination of manganese content
GB/T 223.64 Iron, Steel and alloy - Determination of manganese content -
Flame atomic absorption spectrometric method
GB/T 223.67 Iron, steel and alloy - Determination of sulfur content -
Methylene blue spectrophotometric method
GB/T 223.68 Methods for chemical analysis of iron steel and alloy - The
combustion potassium iodate volumetric method for the determination of
sulfur content
GB/T 223.72 Methods for chemical analysis of iron, steel and alloy - The
alumina chromatographic separation-barium sulfate gravimetric method for
the determination of sulfur content
GB/T 223.74 Methods for chemical analysis of iron, steel and alloy - The
combustion gravimetric/gas-volumetric method for the determination of
combined carbon content
GB/T 223.79 Iron and steel - Determination of multi-element contents - X-
ray fluorescence spectrometry (Routine method)
GB/T 228-2002 Metallic materials – Tensile testing at ambient temperature
(eqv ISO 6892.1998)
GB/T 241 Metal materials - Tubes - Hydrostatic pressure test
GB/T 242 Metal materials - Tube - Drift-expending test (GB/T 242-2007, ISO
8493.1998, IDT)
GB/T 244 Metallic materials - Tube - Bend test (GB/T 244-2008, ISO
8491.1998, IDT)
GB/T 246 Metal materials - Tube - Flattening test (GB/T 246-2007, ISO
8492.1998, IDT)
GB/T 2102 Acceptance packing marking and quality certification of steel tube
GB/T 4336 Standard test method for spark discharge atomic emission
spectrometric analysis of carbon and low-alloy steel (Routine method)
GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests (GB/T
10125-1997, eqv ISO 9227.1990)
GB/T 11605 Methods of humidity measurement
GB/T 16488 Water quality - Determination of petroleum oil, animal and
vegetable oils - Infrared photometric method
GB/T 20066 Steel and iron - Sampling and preparation of samples for the
determination of chemical composition (GB/T 20066-2006, ISO 14284.1996,
IDT)
GB/T 20123 Steel and iron - Determination of total carbon and sulfur content
Infrared absorption method after combustion in an induction furnace (routine
method) (GB/T 20123-2006, ISO 15350.2000, IDT)
GB/T 20126 Unalloyed steel - Determination of low carbon content - Part 2.
Infrared absorption method after combustion in an induction furnace (with
preheating) (GB/T 20126-2006, ISO 15349-2.1999, IDT)
3 Classification and code
3.1 Dimensional accuracy
a) Ordinary accuracy, codenamed PA;
b) Advanced accuracy, codenamed PC.
3.2 Mechanical properties
a) Ordinary steel tube, codenamed MA;
b) Soft steel tube, codenamed MB.
3.3 Surface status
The surface status and code of the steel tube are shown in Table 1. According
to the requirements of the purchaser, through negotiation between the supplier
and the purchaser, it may supply the steel tubes of other surface status than
those listed in Table 1.
Where.
W - The theoretical weight per meter of steel tube, in kilograms per meter
(kg/m);
D - The outer diameter of steel tube, in millimeters (mm);
S - The wall thickness of steel tube, in millimeters (mm).
5.4.3 For steel tubes delivered according to theoretical weight, the allowable
deviation of the actual weight of each batch from the theoretical weight shall be
± 7.5%.
5.5 Example of marking
Marking order. dimensional accuracy - specification dimension - mechanical
properties - surface type and plating post-treatment - standard number
Example 1. The soft cold drawn precision single welded steel tubes which are
copper-plated for the use of coil cooling, in ordinary accuracy, outer diameter
4.76 mm, wall thickness 0.50 mm, is marked as follows.
PA-4.76 x 0.50-MB-Cu-GB/T 24187
Example 2. The ordinary cold drawn precision single welded steel tubes which
are passivated into strip-shaped fixed length for automotive use, in advanced
accuracy, outer diameter 8.00 mm, wall thickness 0.70 mm, length 6000 mm,
outer surface galvanized layer thickness in 8 μm, is marked as follows.
PC-8.00 x 0.70 x 6000-MA-Zn 8 D-GB/T 24187
6 Technical requirements
6.1 Cold-rolled steel strip
6.1.1 Chemical composition of steel strip
6.1.1.1 For cold-rolled steel strips for steel tubes, it may use co...
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