ASME SB111 C68700 Seamless Brass Tubes O61 For Heat Exchanger

ASME SB111 C68700 Seamless Brass Tubes O61 for Heat exchanger

ASME SB111 seamless tubes are commonly used in condensers and evaporators.

ASME SB111 C68700 Material Quality and Composition

• Base material, provides excellent thermal conductivity and mechanical strength, Cu:76.0-79.0%

• Enhances strength and workability while maintaining corrosion resistance, Zn:Remainder

• Improves corrosion resistance, particularly in high-velocity seawater, Al:1.8 – 2.5%

• Adds resistance to erosion and impingement, Fe:0.05 – 0.20%

• Prevents dezincification, ensuring long-term durability in water systems, As:0.02 – 0.06%

• Maintains machinability; low content ensures compliance with environmental regulations such as RoHS, Pb:≤0.05%

ASME SB111 C68700 Product Dimensions and Tolerances

1.Outer Diameter (OD)

Range/Value: 6 mm - 300 mm

Tolerance: For OD ≤ 50 mm, the tolerance is ±0.05 mm; for OD > 50 mm, it is ±0.1 mm.

Note: Precise OD tolerance ensures compatibility in heat exchangers and condensers.

2. Wall Thickness (WT)

Range/Value: 0.5 mm - 10 mm

Tolerance: ±10% of the nominal thickness

Note: Uniform wall thickness ensures consistent mechanical and thermal performance.

3. Length

Range/Value: Up to 12 m

Tolerance: ±5 mm for fixed lengths

Note: Can be customized to meet specific project requirements.

4. Straightness

Range/Value: ≤1 mm/m

Tolerance: Not specifically marked

Note: Ensures easy installation and alignment during assembly.

ASME SB111 C68700 Delivery Condition

• Surface Finish: Smooth, bright, and free from defects such as scratches, pits, or oxidation.
• Cleaning: Cleaned internally and externally to remove oil, grease, and other residues.
• Packaging: Bundled with protective plastic wraps or wooden crates to prevent damage during transit.
• Heat Treatment: Supplied in annealed, stress-relieved, or as-drawn condition, depending on customer requirements.
• Marking: Tubes are marked with alloy name, size, and batch number for traceability.
• Customization: Lengths, finishes, or special coatings (e.g., anti-corrosion) available upon request.

ASME SB111 C68700 Performance Characteristics

1.Tensile Strength

Value: 310 - 450 MPa. Provides high mechanical strength, suitable for demanding applications.

2.Yield Strength

Value: 105 - 220 MPa. Sufficient yield strength for moderate pressure systems.

3.Elongation

Value: ≥ 35%. Good ductility allows for bending, flaring, and forming during fabrication.

4.Thermal Conductivity

Value: ~120 W/M·K Excellent heat transfer efficiency, critical for heat exchangers and condensers.

5.Corrosion Resistance

Value: Outstanding in seawater. Highly resistant to dezincification, impingement, and biofouling in marine environments.

6.Erosion Resistance

Value: High. Aluminum content improves resistance to high-velocity water or turbulent flows.

7.Operating Temperature

Value: Up to 300°C. Suitable for high-temperature industrial and marine applications.

8.Density

Value: ~8.53 g/cm³ Standard density for brass alloys, ensuring manageable weight for installations.

ASME SB111 C68700 Standard Certifications

• B111: Standard specification for copper and copper-alloy seamless condenser tubes.
• EN 12451 European: standard for copper and copper alloy seamless tubes for heat exchangers.
• ISO 19688: International standard for seamless copper-alloy tubes for heat exchangers.
• BS2871 Part 3: British standard for seamless tubes for heat exchangers and condensers.
• RoHS Compliance:Restriction of Hazardous Substances, ensuring minimal lead content for safety.
• NACE MR0175: Ensures suitability for sour service environments where resistance to H2S corrosion is required.
• PED Compliance: Pressure Equipment Directive compliance for pressure systems in Europe.