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ASME SB111 C68700 Seamless Tube, OD 10-50mm, for Seawater Desalination Condenser

ASME SB111 C68700 Seamless Tube, OD 10-50mm, for Seawater Desalination Condenser

ASME SB111 C68700 Seamless Tube, OD 10-50mm, for Seawater Desalination Condenser
ASME SB111 C68700 Seamless Tube, OD 10-50mm, for Seawater Desalination Condenser
Categories Copper Alloy Tube
Brand Name: Yuhong
Model Number: ASME SB111 C68700 Seamless Brass Tubes
Certification: ABS, BV, DNV-GL , PED, TUV, LR, KR, NK, CCS.
Place of Origin: China
MOQ: 100 kgs
Price: Negotiable
Payment Terms: L/C, T/T
Supply Ability: 800 Tons/ month
Delivery Time: 30 days
Packaging Details: Ply-wooden Case /Iron Case/ Bundle with plastic Cap etc.
Standard:: ASME SB111
Shape: Round
Length: 6m -12m, Customers' requirement
Testing: Flattening Test, Expansion Test, Mercurous Nitrate Test, Ammonia Vapor Test, Chemical Analysis, Grain Size, Tension Testing
Application: Shell and tube heat exchanger ASME standard
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Yuhong Group Co.,Ltd
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ASME SB111 C68700 Seamless Tube, OD 10-50mm, for Seawater Desalination Condenser

ASME SB111 C68700 Seamless Tube, OD 10-50mm, for Seawater Desalination Condenser


C68700 is an aluminum brass alloy with arsenic addition, specifically designed for harsh environments such as seawater desalination. Its composition (Cu: 76-79%, Al: 1.8-2.5%, As: 0.02-0.06%, Zn: balance) ensures exceptional corrosion resistance in seawater and high thermal conductivity. The arsenic content further enhances resistance to dezincification, a critical feature for long-term durability in marine applications.

The production process of Brass Tube

  1. Raw Materials

  2. Melting&Casting

  3. Extrusion

  4. Rolling

  5. Intermediate Heat Treatment 1

  6. Straightening

  7. Three-line Drawing

  8. Acid Washing

  9. Intermediate Heat Treatment 2

  10. Two Cascade Drawing

  11. Cutting&Cleaning

  12. Eddy Current Test

  13. Final Heat Treatment

  14. Packing

  15. Shipping

Comparison Table of Brass Tube Alloy


Implementation Standard

Alloy Specifications

​​GB/T 5231​​

​​HAI 77-2​​

​​HSn70-1, HSn72-1​​

​​ASTM B111​​

​​C68700​​

​​C44300​​

​​BS EN12451​​

​​CuZn20Al2As​​

​​CuZn28Sn1As​​

​​JIS H3300​​

​​C6870, C6871, C6872​​

​​C44300​​

​​AS 1569​​

​​C68700​​

​​C44300​

​​Chemical Composition of Brass Tube Alloys​


Implementation Standard

Alloy

Cu (%)

Al/Sn (%)

As (%)

Fe (%)

Pb (%)

Other Impurities (%)

Zn (%)

Total Impurities (%)

​​GB/T 5231​​

HAl77-2

76.0-79.0

1.8-2.5 (Al)

0.02-0.06

≤0.06

≤0.07

≤0.07 (Other)

Balance

≤0.6

​​ASTM B111​​

C68700

76.0-79.0

1.8-2.5 (Al)

0.02-0.06

≤0.06

≤0.07

≤0.07 (Other)

Balance

≥99.5 (Sum)

​​ASME SB111​​

​​JIS H3300​​

C6870

76.0-79.0

1.8-2.5 (Al)

0.02-0.06

≤0.05

≤0.05

≤0.05 (Other)

Balance

-

​​JIS H3300​​

C6871

76.0-79.0

1.8-2.5 (Al)

0.02-0.06

≤0.05

≤0.05

≤0.05 (Other); Si: 0.20-0.50

Balance

-

​​JIS H3300​​

C6872

76.0-79.0

1.8-2.5 (Al)

0.02-0.06

≤0.05

≤0.05

≤0.05 (Other); Ni: 0.20-1.0

Balance

-

​​BS EN12451​​

CuZn20Al2As (CW702R)

76.0-79.0

1.8-2.3 (Al)

0.02-0.06

≤0.07

≤0.05

Ni ≤0.1; P ≤0.01; Mn ≤0.1; ≤0.3 (Other total)

Balance

-

​​AS 1569​​

C68700

76.0-79.0

1.8-2.5 (Al)

0.02-0.06

≤0.06

≤0.07

≤0.07 (Other)

Balance

-

​​GB/T 5231​​

HSn70-1

69.0-71.0

0.8-1.3 (Sn)

0.03-0.06

≤0.10

≤0.05

≤0.05 (Other)

Balance

≤0.3

​​GB/T 5231​​

HSn72-1

70.0-73.0

0.9-1.2 (Sn)

0.02-0.06

≤0.06

≤0.07

≤0.07 (Other)

Balance

≤0.4

​​ASTM B111​​

C44300

70.0-73.0

0.9-1.2 (Sn)

0.02-0.06

≤0.06

≤0.07

≤0.07 (Other)

Balance

≥99.6 (Sum)

​​ASME SB111​​

​​JIS H3300​​

C4430

70.0-73.0

0.9-1.2 (Sn)

0.02-0.06

≤0.05

≤0.05

≤0.05 (Other)

Balance

-

​​BS EN12451​​

CuZn28Sn1As (CW706R)

70.0-72.5

0.9-1.3 (Sn)

0.02-0.06

≤0.07

≤0.05

Ni ≤0.1; P ≤0.01; Mn ≤0.1; ≤0.3 (Other total)

Balance

-

​​AS 1569​​

C44300

70.0-73.0

0.8-1.2 (Sn)

0.02-0.06

≤0.06

≤0.07

≤0.07 (Other)


Primary Applications in Seawater Desalination​​

  1. ​​Heat Exchangers and Condensers​​

    • C68700 tubes are widely used in ​​multi-stage flash (MSF)​​ and ​​reverse osmosis (RO)​​ systems. Their high thermal conductivity (64 BTU·in/(hr·ft²·°F)) ensures efficient heat transfer between seawater and desalination equipment
    • The seamless structure eliminates weld seams, reducing leakage risks in high-pressure environments

  2. ​​Corrosion Resistance​​

    • The aluminum content forms a protective oxide layer, while arsenic prevents dezincification. This combination allows the tubes to withstand saltwater, chlorine, and sulfide exposure, even at high flow velocities
    • Example: In ​​seawater intake pipelines​​, C68700 resists pitting and crevice corrosion, extending equipment lifespan

  3. ​​Mechanical Performance​​

    • ​​Tensile Strength:​​ 345–600 MPa (minimum 345 MPa for annealed tubes)
    • ​​Yield Strength:​​ 125–540 MPa, suitable for high-pressure condensers and evaporators.
    • ​​Fatigue Resistance:​​ Maintains structural integrity under cyclic thermal and mechanical stresses.

Product Tags:

Aluminum Brass Tube ASTM SB111

  

C68700 Aluminum Brass Seamless Tubes

  

Evaporator Aluminum Brass Seamless Tubes

  
China ASME SB111 C68700 Seamless Tube, OD 10-50mm, for Seawater Desalination Condenser factory

ASME SB111 C68700 Seamless Tube, OD 10-50mm, for Seawater Desalination Condenser

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