Double wall copper-brazed steel tubing
1 Scope
This standard specifies the dimensions, shapes and weights, technical requirements, test methods and inspection rules, as well as packaging, marking and quality certification of double wall copper-brazed steel tubing.
This standard is applicable to double wall copper-brazed steel tubing made of copper as brazing material for general engineering uses, particularly in automotive, refrigeration, electric heating and electrical appliance industries for engineering pipes such as brake lines, fuel lines, oil lines, heating and cooling units, and the like.
2 Normative references
The following normative documents contain provisions which, through reference in this text, 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 document referred to applies.
GB/T 228 Metallic materials - Tensile testing at ambient temperature (GB/T 228-2002, eqv ISO 6892:1998)
GB/T 241 Metal materials - Tube - Hydrostatic pressure test
GB/T 242 Metallic materials - Tube - Drift-expanding test (GB/T 242-1997, eqv ISO 8493:1986)
GB/T 244 Metallic materials - Tube - Bend test (GB/T 244-1997, eqv ISO 8491:1986)
GB/T 246 Metallic materials - Tube - Flattening test (GB/T 246-1997, eqv ISO 8492:1986)
GB/T 2102 Acceptance, packing, marking and quality certification of steel pipe
GB/T 7735-2004 Steel tubes - The inspection method on eddy current test (GB/T 7735-2004, ISO 9304:1989, MOD)
GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests (GB/T 10125-1997, eqv ISO 9227:1990)
YB/T 069 Copper-coated steel strips for welded pipe
3 Ordering information
Contracts or orders made under this standard shall cover the following items:
a) No. of this standard;
Foreword i
1 Scope
2 Normative references
3 Ordering information
4 Dimensions, shapes and weights
5 Technical requirements
6 Test methods
7 Inspection rules
8 Packaging, marking and quality certification
Annex A (Normative) Double wall drift-expanding test
Annex B (Informative) Minimum burst pressure of steel tubing
Annex C (Normative) Methods for testing cleanliness of inner surfaces
Annex D (Informative) Galvanized corrosion-resistant protective layers of steel tubing
