Brass tube common specifications and standards are categorized and organized, covering international standards, domestic standards and industry application specifications:
First, international standards
1.ASTM standard (American Society for Testing and Materials)
ASTMB135: seamless brass tube standard (for general use).
Grade: C26000 (H65), C28000 (MuntzMetal)
Outside diameter range: 3mm~200mm
Wall thickness range: 0.5mm~10mm
ASTMB43: Standard for seamless red brass tubes (for condensers and heat exchangers).
Grade: C23000 (85-15 brass)
Outer diameter range: 6mm~150mm
Wall thickness range: 0.7mm~5mm
2.EN Standard (European Standard)
EN12449: General Standard for Seamless Round Tubes of Copper and Copper Alloys.
Grade: CW505L (H65), CW507L (H63)
Outer diameter range: 6mm~267mm
Wall thickness range: 0.5mm~10mm
EN12451: Copper and copper alloy seamless tubes for heat exchangers.
Grade: CW706R (Navy Brass)
Outer diameter range: 10mm~100mm
Wall thickness range: 0.8mm~5mm
3.JIS Standard (Japanese Industrial Standard)
JISH3300: Seamless copper and copper alloy tubes.
Grade: C2600 (H65), C2800 (six four brass)
Outer diameter range: 3mm~200mm
Wall thickness range: 0.5mm~10mm
II. Domestic Standards
1.GB standard (China national standard)
GB/T1527-2017: copper and copper alloy drawn pipe.
Grade: H65, H62, HPb59-1
Outer diameter range: 3mm~200mm
Wall thickness range: 0.5mm~10mm
GB/T8891-2013: Copper and copper alloy tubes for heat exchangers.
Grade: HSn70-1 (Navy brass)
Outer diameter range: 10mm~100mm
Wall thickness range: 0.8mm~5mm
2.YS standard (China nonferrous metal industry standard)
YS/T662-2007: Seamless copper tubes for air-conditioning and refrigeration equipment.
Grade: H65, H62
Outer diameter range: 6mm~50mm
Wall thickness range: 0.5mm~3mm
Common specifications
1.Outer diameter and wall thickness
Small diameter pipe:
Outer diameter: 3mm~20mm
Wall thickness: 0.5mm~2mm
Applications: electrical and electronic, precision instruments
Medium caliber tube:
Outer diameter: 20mm~100mm
Wall thickness: 1mm~5mm
Application: building water supply and drainage, air conditioning and refrigeration
Large caliber pipe:
Outer diameter: 100mm~200mm
Wall thickness: 3mm~10mm
Application: marine industry, heat exchanger
2.Length
Straight pipe: standard length 6m, allowable deviation ±10mm.
Coil: length 50m~100m, suitable for continuous processing scenario.
IV. Industry application specifications
1.Refrigeration and air conditioning
Specification: Outside diameter 6mm~25mm, wall thickness 0.5mm~1.5mm.
Standard: in line with GB/T17791 (seamless copper tubes for air-conditioning and refrigeration).
2.Building water supply and drainage
Specification: OD 15mm~100mm, wall thickness 1mm~3mm.
Standard: Comply with GB/T18033 (copper pipe for construction).
3.Automobile manufacturing
Specification: Outside diameter 8mm~50mm, wall thickness 0.8mm~2.5mm.
Standard: in accordance with ISO4144 (copper and copper alloy tubes for automobile).
4.Shipbuilding industry
Specification: OD 20mm~150mm, wall thickness 1.5mm~5mm.
Standard: GB/T8891 (copper tubes for heat exchangers).
V. Quality control and testing
Chemical composition:
Copper (Cu) content: 60% ~ 70
Zinc (Zn) content: 30% ~ 40
Lead (Pb) content: ≤ 0.03% (lead-free brass)
Mechanical properties:
Tensile strength: ≥300MPa (H65)
Elongation: ≥40% (annealed state)
Size tolerance:
Outer diameter tolerance: ±0.1mm (precision tube)
Wall thickness tolerance: ±0.05mm (high-precision tube)
Surface quality:
Inner wall finish: Ra≤0.8μm
No cracks, scratches, oxidized skin on the outer surface.
The above specifications and standards can ensure the performance and reliability of brass tubes in different application scenarios to meet the needs of the industry.
