ASTM A249 TP304 ERW Heat Exchanger Tube

Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of ASTM A249 TP304 ERW Heat Exchanger Tube in China. With abundant experience, we warmly welcome you to wholesale customized ASTM A249 TP304 ERW Heat Exchanger Tube from our factory. For price consultation, contact us.

If you are looking for ERW stainless steel pipes compliant with ASTM A249 TP304 standards for heat exchangers to ensure stable heat transfer performance, corrosion resistance, and long service life, GNEE can provide professional manufacturing and supply services for precision ERW welded stainless steel tubes. Our products fully comply with ASTM A249, ASME SA249 standards.

 

The 304 stainless steel heat exchanger tubes we supply are manufactured from cold-rolled stainless steel strip through a complete production process including high-frequency welding, continuous heat treatment, sizing, straightening, and comprehensive online testing such as eddy current inspection. This ensures stable mechanical properties, a uniform microstructure, and reliable leak-proof performance under pressure.

 

The wall thickness tolerance is controlled within ±0.1 mm, and the outer diameter accuracy reaches ±0.05 mm. The tubes also demonstrate excellent bending, flaring, and expanding formability, meeting the strict requirements of heat exchanger manufacturing.

ASTM A249 TP304 Welded Stainless Steel Pipe

ASTM A249 TP304 Welded Heat exchanger tube

Our ASTM A249 TP304 stainless steel ERW tubes feature a pickled and passivated surface finish, providing enhanced corrosion resistance and a maximum service temperature of up to 870°C. They are widely used in heat exchangers, boilers, condensers, HVAC systems, food processing equipment, and pressure vessels.

 

Compared with conventional welded pipes, our ASTM A249 TP304 ERW heat exchanger tubes offer higher cleanliness, stronger pressure resistance, and improved resistance to oxidation and stress corrosion. They have helped heat exchanger manufacturers worldwide solve common problems such as tube cracking, poor weld quality, dimensional deviations, and short service life.

 

Free material equivalence & compliance check
(ASTM / EN / JIS / GB)

What is the difference between ASTM A249 and ASTM A213 ?

ASTM A249 covers welded austenitic stainless steel tubing, whereas ASTM A213 covers seamless ferritic and austenitic alloy steel tubing. Both are used in high-temperature and high-pressure applications, such as boilers, superheaters, and heat exchangers.

Does ASTM A249 welded pipe require heat treatment?

Yes. ASTM A249 stipulates that all piping must be supplied in the solution-annealed condition. The pipe must be heated to above 1040°C and rapidly quenched to relieve welding stresses and restore corrosion resistance.

Why is a "Minimum Wall" thickness typically specified for heat exchanger tubes?

In heat exchanger design, wall thickness is directly related to pressure-bearing safety. While the ASTM A249 standard defaults to "Average Wall" thickness, a purchaser can specify "Minimum Wall" (MW) in the contract to ensure that the thickness at any point along the tube does not fall below the design requirements.

Testing Of ASME SA249 Grade Tp304 Heat Exchanger Tube

Flattening Test: Checks weld seam quality.
Flange Test / Flaring Test: Ensures pipe ends do not crack during connection to tube sheets.
Reverse Bend Test: A mandatory test specific to A249, used to detect lack of fusion or cracks at the weld root.
Hardness Test: TP304 requires hardness not to exceed 192 HBW or 90 HRB.
Non-Destructive Testing: 100% Eddy Current testing or Hydrostatic testing is required.

Flaring Test

Flattening Test

Hardness Test

Hydrostatic Test

304 SS pipe PMI

Intergranular corrosion test

304 SS boiler tube supplier

 We possess fully automated high-frequency induction welding production lines and online bright annealing technology, ensuring an internal weld coefficient of 1.0 and achieving industry-leading outer diameter tolerance control within ±0.03mm. GNEE has maintained a 99.7% customer acceptance rate for 10 consecutive years, providing zero-leakage, long-life pipe guarantees for global thermal engineering projects.

Packaging

Plastic Caps: Both ends of each tube must be fitted with secure plastic caps.
Function: Protection against damage and contamination.
Individual Plastic Bagging: It is recommended that each tube be individually enclosed in a plastic film bag or bubble wrap.
Hexagonal Bundles: For small to medium-diameter tubes, hexagonal bundling is typically employed to ensure structural stability.

 GNEE's annual export volume of ASTM A249 TP304 ERW heat exchanger tubes has exceeded 2,000 tons, with products distributed in over 60 countries and regions, including Germany, the United States, Brazil, and Southeast Asia.

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