ASME SA249 TP304 Bright Annealed Stainless Steel Welded Tube For Refrigeration System

ASME SA249 TP304 Bright Annealed Stainless Steel Welded Tube For Refrigeration System

ASME SA249 TP304 stainless steel welded Tube is a high-precision, longitudinally welded stainless steel tube specifically designed and manufactured for use in critical heat exchange and fluid conveyance applications, most notably in refrigeration and air-conditioning systems. It conforms to the ASME SA249/ASTM A249 specification, which is the standard for welded austenitic steel boiler, superheater, heat-exchanger, and condenser tubes. ASTM A249 TP304 Stainless steel bright annealed tubes have different polished grades, such as 180#, 320#, 400#, 600#, 800# grit. In refrigeration systems (including chillers, condensers, evaporators, and direct expansion coils), these tubes serve as the essential conduit for refrigerants or water/brine. The combination of TP304 stainless steel (offering excellent corrosion resistance, toughness, and weldability) with the bright annealed finish creates a tube that is inherently clean, resistant to oxidation, and has a low surface roughness that minimizes pressure drop and inhibits scale/bacterial adhesion. This makes it superior to plain carbon steel or non-annealed welded tubes in terms of longevity, efficiency, and system purity.

Equivalent Grade of SS304 Tube:

Chemical Composition:

Key Features Of A249 TP304 SS Tubes:

• Excellent Corrosion Resistance: TP304 offers strong resistance to refrigerants, water, brine, and atmospheric corrosion.
• High Purity & Cleanliness: The BA process ensures a scale-free, ready-to-use surface, preventing system contamination.
• Superior Hydraulic Performance: Smooth interior surface reduces friction and pressure drop.
• High Strength & Ductility: Good mechanical properties for bending, expanding, and flaring.
• Excellent Weldability & Formability: Easy to fabricate into coils, bends, and assemblies.
• Hygienic & Sanitary: Non-porous, easy to clean, compliant with food-grade standards.
• Aesthetic Appeal: The bright, shiny finish is desirable for visible components.

Benefits Of Bright Annealed (BA) finish:

• No scale, no pickling required: The surface is clean and passive.
• Superior corrosion resistance: The undisturbed, chromium-rich oxide layer is fully intact.
• Hygienic & cleanable: Ideal for food, beverage, and pharmaceutical cooling.

Different Applications Of ASME SA249 TP304 SS Welded Tubes:

1. Primary Application: Refrigeration & Air-Conditioning Systems:

• Shell & Tube Heat Exchangers: As the tube bundle for condensers and evaporators.
• Direct Expansion Coils / Finned Tube Heat Exchangers: For air-cooling units.
• Receiver Tanks, Intercoolers, Oil Coolers.
• Ammonia Refrigeration Systems: Where copper is incompatible.

2. Other Critical Applications:

• Food, Beverage & Pharmaceutical Processing: Sanitary process lines, pasteurizers.
• Chemical & Petrochemical: Instrumentation lines, sample lines, heat exchangers for non-severe corrosives.
• Power Generation: Low-pressure boiler tubes, instrumentation lines
• Automotive: Exhaust system components, fuel lines.
• Architectural: Handrails, decorative structures where a BA finish is required.