Brass Condenser Tubes
Seamless brass tubes for surface condensers, evaporators and heat exchangers operating with cooling water and project-specific process media.
DLSS supplies C68700 Aluminum Brass and C44300 Admiralty Brass condenser tubes according to ASTM B111 / ASME SB111 and project specifications, with straight, U-bend, customized long-length and integral enhanced-surface options available for review.
- Brass Material Grades — C68700 Aluminum Brass · C44300 Admiralty Brass
- Core Tube Standard — ASTM B111 / ASME SB111
- Testing & Documentation — ET · Pressure Testing · Dimensional · EN 10204 3.1 / 3.2
Brass Material Range
C68700 · C44300
Temper & Grain Size
Project-specified temper and grain-size condition
U-Bend Capability
Custom straight-leg length & bend radius
Inspection Support
ET · Pressure Testing · Dimensional · TPI
Brass Tubes for Condenser and Cooling-Water Service
Brass condenser tubes are used in surface condensers, evaporators, distillers and heat exchangers where thermal performance, formability and project-specific cooling-water resistance are required.
C68700 and C44300 belong to different brass alloy families:
- C68700 is an aluminum-bearing brass alloy
- C44300 is a tin-bearing admiralty brass alloy
Both alloys are covered by ASTM B111 for seamless condenser and heat-exchanger tubes, but they should not be treated as interchangeable materials.
C44300 is listed for condenser and distiller tube applications, including applications requiring corrosion and pitting resistance. C68700 is listed for condenser, evaporator, distiller and heat-exchanger tubes, including selected fresh-water and salt-water service.
The correct alloy and supply condition should be selected according to:
Cooling-water source · Chloride concentration · Water temperature · Flow velocity · Dissolved solids · Sulfide or pollution level · pH · Design pressure · Fouling tendency · Cleaning method · Tube-to-tubesheet joint · Expected service life · Applicable product standard · Inspection requirements
DLSS supports brass condenser tube projects from material and specification review through straight-tube supply, U-bending, integral finning, inspection, documentation, packing and delivery.
Condenser Tube Supply
Straight, U-bend and project-specific tube configurations.
Thermal Performance
Brass alloy options for condenser and heat-transfer applications.
Dimensional Control
OD, wall thickness, length and tube-to-tubesheet fit.
Inspection Support
ET, pressure testing, dimensional inspection and documentation.
Brass Grades We Supply
Select the alloy according to cooling-water conditions, corrosion requirements, tube design and project specification.
C68700 Aluminum Brass
UNS C68700 Aluminum Brass
Aluminum-bearing brass alloy used for condenser, evaporator, distiller and heat-exchanger tube applications.
Key Selection Points
- Aluminum brass alloy family
- Good cold-working capability
- Used for condenser and heat-exchanger tubes
- Documented for selected fresh-water and salt-water applications
- Available for straight, U-bend and integral enhanced tube requirements
Typical Applications
Surface Condensers · Evaporators · Distillers · Heat Exchangers · Selected Cooling-Water Service
C44300 Admiralty Brass
UNS C44300 Admiralty Brass
Tin-bearing admiralty brass alloy used for condenser, evaporator and industrial heat-transfer tube applications.
Key Selection Points
- Admiralty brass alloy family
- Tin-bearing copper-zinc alloy
- Good cold-working capability
- Used in condenser and distiller tube applications
- Available for straight, U-bend and integral enhanced tube requirements
Typical Applications
Surface Condensers · Evaporators · Distillers · Industrial Cooling · Heat Exchangers
C68700 or C44300?
The correct brass alloy should be selected from the actual water conditions and project specification—not from the alloy name alone.
| Item | C68700 | C44300 |
|---|---|---|
| Common Name | Aluminum Brass | Admiralty Brass |
| Main Alloy Family | Copper-Zinc-Aluminum | Copper-Zinc-Tin |
| Official Description | Aluminum Brass, Arsenical | Admiralty, Arsenical |
| Typical Tube Use | Condenser, evaporator and heat-exchanger tubes | Condenser and distiller tubes |
| Water-Service Positioning | Selected fresh-water and salt-water service | Cooling-water and condenser service subject to project assessment |
| Final Selection | Based on water chemistry and design | Based on water chemistry and design |
Material Selection Requires Water Data
Do not describe C68700 as universally better than C44300, or vice versa. Final selection should follow the project material specification and corrosion assessment.
Water source
Chloride level
Operating temperature
pH
Flow velocity
Pollution or sulfide content
Design pressure
Cleaning method
Expected service life
Available Brass Tube Forms
Different condenser and heat-exchanger designs require different tube configurations.
Straight Brass Condenser Tubes
Seamless straight C68700 and C44300 tubes for surface condensers, evaporators and heat exchangers according to ASTM B111 / ASME SB111.
Seamless · Fixed Length · Cut Length · Project-Specific Length
Brass U-Bend Tubes
U-bend seamless brass tubes manufactured according to exchanger drawings and project-specific bending requirements.
Parameters We Can Review
Alloy / Grade · Tube OD · Wall Thickness · Developed Length · Straight-Leg Length · Bend Radius · Tube Pitch · Wall Thinning · Ovality · Temper or Grain-Size Condition · Inspection Requirement
Long Length Brass Tubes
Customized tube lengths for condenser and heat-exchanger bundles requiring project-specific lengths and fewer joints.
Available length depends on alloy, OD, wall thickness, temper, manufacturing route and transportation requirements.
Brass Finned Tubes
Seamless brass tubes with integral enhanced surfaces produced by cold forming to increase effective heat-transfer area.
Parameters We Can Review
Base Tube OD · Wall Thickness · Fin Root Diameter · Fin Height · Fin Pitch / Density · Finned Length · Unfinned Length · Residual Wall Thickness · Finished Temper · Inspection Requirement
Brass Condenser Tube Specifications
| Specification | Available Options |
|---|---|
| Material Grades | C68700 / C44300 |
| Main Standard | ASTM B111 / ASME SB111 |
| Construction | Seamless under ASTM B111 |
| Welded Option | Where specified under ASTM B543 / applicable specification |
| Outside Diameter | Standard & Customized |
| Wall Thickness | Standard / Project-Specified |
| Length | Fixed / Cut / Customized Long Length |
| Tube Form | Straight / U-Bend / Integral Enhanced |
| Temper / Grain Size | According to alloy, standard and purchase specification |
| Surface | Clean / Bright / Project-Specified Surface |
| End Condition | Plain / Cut / Protected Ends |
| Inspection | ET / Hydro / Pneumatic / Dimensional / Alloy Verification / TPI |
| Documentation | MTC / EN 10204 3.1 / 3.2 / Inspection Reports |
| Packing | Bundles / Wooden Cases / Project Packing |
Brass Condenser Tube Standards
ASTM B111 / ASME SB111
Core Seamless Condenser Tube StandardSeamless copper and copper-alloy tubes for surface condensers, evaporators and heat exchangers.
ASTM B395 / B395M
U-Bend Tube StandardU-bend seamless copper and copper-alloy heat-exchanger and condenser tubes.
ASTM B359 / B359M
Integral Enhanced Tube StandardSeamless copper and copper-alloy condenser and heat-exchanger tubes with integral enhanced surfaces.
ASTM B543 / B543M
Related Welded Tube StandardWelded copper and copper-alloy tubes for condensers, evaporators and heat exchangers.
Temper, Grain Size & Supply Condition
Do not place “O61 / H55” in the product headline as though they are the universal default for all C44300 and C68700 tubes. The RFQ and purchase order should state the required temper, grain size and end condition.
Brass condenser tubes should be ordered with a clearly defined temper, grain-size designation or finished condition.
The required condition affects:
- Mechanical properties
- Tube expansion
- U-bending
- Tube-to-tubesheet rolling
- Residual stress
- Grain size
- Integral-fin forming
- End annealing
- Inspection acceptance
For C44300 and C68700 tube products, Copper Development Association data lists OS025, nominal grain size 0.025 mm, as a representative tube condition. This should not be interpreted as the only available condition; the final requirement must follow ASTM B111 and the purchase specification.
Grain-Size-Specified Annealed Tube
Annealed tube condition specified by nominal grain size, such as OS025 where applicable.
Drawn Tube Condition
Light-drawn or hard-drawn condition where permitted by the applicable standard and fabrication requirements.
Integral Enhanced Tube Condition
Under ASTM B359, the finished enhanced tube may be supplied in O61 annealed or as-fabricated condition. Unenhanced sections may retain the prior temper, or be supplied in O61 or H55 where applicable.
Brass Condenser Tube Applications
Heat Exchanger Manufacturers
Straight, U-bend and integral enhanced brass tube supply for OEM condenser and heat-exchanger fabrication.
Power Plants & Surface Condensers
C44300 and C68700 tube options for selected surface condensers and circulating-water systems.
Evaporators & Distillers
Brass tube options for evaporator, distiller and heat-transfer equipment according to project water chemistry.
Selected Fresh-Water & Salt-Water Service
C68700 and C44300 options subject to water chemistry, velocity, pollution level and project corrosion assessment.
Industrial Cooling
Brass condenser tubes for selected cooling-water and industrial heat-transfer systems.
Testing, Inspection & Documentation
ET
Eddy Current Testing
UT
Ultrasonic Testing
PMI
Positive Material Identification
Hydro
Hydrostatic Testing
Dimensional Inspection
OD · WT · Length · Straightness
Documentation
Reports & Certificates EN 10204 3.1 / 3.2
Project Documentation Support
- EN 10204 3.1 / 3.2 Certificates
- MTC (Mill Test Certificate)
- PMI Report
- ET / UT Reports
- Dimensional Reports
- Packing List & More
Complete documentation for seamless approvals and traceability.
Why DLSS for Brass Condenser Tubes?
Brass Alloy Specification Review
Alloy, standard, grain-size or temper condition, dimensions and inspection requirements reviewed before production.
Integral Enhanced Tube Support
Fin root diameter, fin height, density, residual wall and unfinned-section requirements reviewed according to project drawings.
U-Bending Capability
Drawing-based review of developed length, straight-leg length, bend radius, wall thinning and ovality.
Testing & Traceability
ET, pressure testing, dimensional control and documentation from raw material through shipment.
Packing & Project Delivery
Protected tube ends, moisture-resistant packing, wooden cases and international delivery coordination.
FAQ
What brass grades can DLSS supply for condenser tubes?
What is the main standard for brass condenser tubes?
What is the difference between C68700 and C44300?
Can brass tubes be supplied as U-bend tubes?
Can integral finned brass tubes be supplied?
What temper or grain-size condition should be specified?
What tests can be arranged?
Can EN 10204 3.2 documentation be arranged?
Brass Condenser Tube Technical Resources
C68700 Material Guide
Material composition, grain-size condition and condenser applications.
C44300 Material Guide
Material properties, tube conditions and application considerations.
ASTM B111 Tube Standard
Scope, alloys, tempers, grain size, testing and ordering requirements.
C68700 vs C44300
Compare aluminum brass and admiralty brass for condenser applications.
Copper Alloy Tube Tempers
Understand grain-size designations, annealed and drawn supply conditions.
Brass vs Copper Nickel
Compare brass and copper-nickel materials for condenser and cooling-water applications.