Straight Stainless Steel Tube for Condensers & Liquid Cooling Systems
Industrial straight stainless steel tubes designed for high-efficiency heat exchangers, condensers, and fluid transfer systems. Made from certified stainless steel materials, these tubes offer reliable corrosion resistance, precise dimensions, and stable thermal conductivity. Built for equipment manufacturers and industrial buyers who need products that meet international standards.
Product Types
Seamless Stainless Steel Straight Tubes:
Made by hot extrusion or cold drawing. They have no weld seams, making them ideal for high-pressure and corrosive working conditions.
Welded and Drawn Stainless Steel Tubes:
Formed from precision steel strips, high-frequency TIG or laser welded, and cold drawn to remove internal weld seams. They offer a smooth inner wall and cost efficiency.
Bright Annealed (BA) Tubing:
Heat-treated in a controlled atmosphere furnace to provide an oxide-free, clean internal surface that reduces fluid friction and dirt buildup.
Pickled and Passivated Industrial Tubes:
Chemically treated after production to remove surface free iron and form a stable protective chromium oxide layer for chemical and marine use.
Technical Specifications
| Parameter | Specification |
| Standard Grades | ASTM A213, ASTM A249, ASTM A312, ASTM A688, ASME SA213, ASME SA249 |
| Austenitic Alloys | TP304, TP304L, TP316, TP316L, 317L, 321, 321H, 904L |
| Duplex Alloys | UNS S31803 (2205), UNS S32750 (2507) |
| Outer Diameter (OD) | 6.0 mm to 114.3 mm (1/4 inch to 4.5 inches) |
| Wall Thickness (WT) | 0.5 mm to 4.0 mm (BWG 22 to BWG 8) |
| Standard Lengths | 6000 mm or 12000 mm |
| Cut-to-Length | Custom length available; tolerance ±0.5 mm |
| Straightness | Maximum deviation 1.0 mm per 1000 mm length |
Alloy Selection Guide:
TP304 / TP304L: Good for standard industrial water and general atmospheric conditions.
TP316 / TP316L: Contains molybdenum for better resistance to pitting and corrosion in cooling water or marine environments.
Duplex 2205: Offers high mechanical strength and strong resistance to stress corrosion cracking in chemical plants.
Surface Finishes:
As-Welded / As-Drawn: Standard mill finish for general structural and low-pressure utility lines.
Mechanical Polished (ID/OD): Ground to Ra under 0.2 micrometer for food and sanitary uses.
Bright Annealed (BA): Hydrogen furnace treated to reach Ra under 0.4 micrometer inner surface finish.
Performance Features
High Heat Transfer Efficiency:
Uniform wall thickness prevents hot spots and improves heat exchange performance in shell-and-tube units.
01
Corrosion Resistance:
Low carbon content (C under 0.03 percent) prevents carbon precipitation during welding or high-temperature use.
02
Thermal Stability:
Low thermal expansion helps maintain joint stability under fast temperature changes in boilers and condensers.
03
Smooth Flow Dynamics:
Low internal surface roughness reduces fluid turbulence and slows down mineral scale buildup.
04
Shell and Tube Condensers and Evaporators: Used in HVAC chillers, marine refrigeration, and industrial cooling towers.
Chemical Reactors: Used for transporting corrosive acids, solvents, and hot process fluids.
Food and Beverage Equipment: Used in pasteurizers, liquid transfer lines, and dairy evaporators.
Power Generation: Used in auxiliary heat exchangers, feedwater heaters, and condenser retubing projects.
Selection Checklist for Engineers:
Check operating pressure and temperature to find the required wall thickness under ASME rules.
Match the alloy grade to the fluid chemistry and cooling water chloride levels.
Define the exact tube length based on the tube sheet layout and expansion needs.
Slitting and Forming: High-precision slitting lines keep strip width tolerance within plus or minus 0.05 mm before tube forming.
Automated Welding: Controlled shielding gas prevents oxidation and ensures full-penetration welds.
Inline Annealing: Internal weld beads are rolled flat, followed by 1050 degree Celsius bright annealing to make the metal grain structure uniform.
Non-Destructive Testing (NDT):
100 percent Eddy Current Testing (ET) done per ASTM E426 to find internal or external micro-defects.
Hydrostatic pressure testing done per ASTM rules at set proof pressures.
Dimensional Inspection: Laser micrometers and air gauges check wall thickness during production.
Traceability: Each batch includes a Material Test Report (MTR) per EN 10204 3.1, showing chemical composition and mechanical test results.
Custom Tube Manufacturing
Cut-to-Length Services:
Custom cutting from 500 mm up to 12000 mm with clean, burr-free ends.
Special Dimensions:
Custom wall thickness and diameter combinations made to match old or special equipment.
End Preparation:
Plain square cut, deburred edges, or custom bevels for automatic welding.
Packaging Solutions:
Plastic caps on both ends, moisture-proof wrapping, and strong wooden crates to prevent bending and scratches during shipping.
Certifications
FAQ
As one of the most professional straight stainless steel tube manufacturers and suppliers in China, we're featured by quality products and good service. Please rest assured to wholesale OEM straight stainless steel tube from our factory. Also, custom service is available.
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