​​ASME SB111 C68700 O61 Seamless Tube for High-Temperature Seawater Condenser​

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.