ASME SA249 TP304 Welded Tube for Heat Exchangers – Precision Manufacturing &

Yuhong Group Co., Ltd. specializes in the fabrication of high-performance equipment and components for the thermal processing industry. Our engineering capabilities cover heat exchangers, pressure vessels, air coolers, and critical internal components such as tube bundles, U-tubes, finned tubes, and tube sheets.

We maintain an authoritative position in the supply of welded heat exchanger tubes, strictly adhering to the ASME SA249 specification. By leveraging extensive industrial experience and rigorous quality management, we ensure that every welded tube is fit for high-temperature and high-pressure service conditions.

The foundation of our welded tubes lies in precise metallurgical control. Our TP304 tubes strictly comply with the chemical requirements outlined in Table 1 of the ASME SA249 standard.

Note: The product analysis tolerance rules, as per the standard, guarantee the chemical consistency of every heat supplied.

To guarantee the integrity and mechanical reliability of the welded tubes, we follow strict manufacturing controls and testing protocols as per ASME SA249.

1. Manufacturing Process:
Our TP304 welding tubes are made from flat-rolled steel and are processed using an automatic welding process with no addition of filler metal. The tubes undergo cold working to control their dimensions and mechanical properties. Crucially, all tubes must be free of defects and shall be heat-treated in accordance with Table 2. The heat treatment process (typically solution annealing at a minimum of 1900°F [1040°C]) is crucial to ensure proper corrosion resistance and ductility.

2. Critical Dimensional Controls:
Precision in sizing is critical for successful installation. The tubes are furnished in standard sizes, but custom dimensions are subject to strict tolerances.

3. Testing & Inspection:
To ensure absolute consistency, we conduct rigorous non-destructive and mechanical testing, including:

• Flattening Test: Evaluates the ductility of the welded zone.
• Reverse-Bend Test: Assures the soundness of the weld seam.
• Hydrostatic Test (or NDT): Validates that the tube can withstand standard pressure requirements.
• Tensile & Hardness Tests: Ensures minimum yield strength and ROCKWELL hardness levels meet the specification standards.

The mechanical performance of our tubes is guaranteed to meet or exceed the standard's minimum requirements, ensuring reliable service in high-temperature environments.

Beyond the welded tubes themselves, Yuhong Group offers integrated manufacturing support. We provide complete heat exchanger accessories, including Tube Sheets, Baffle Plates, and Shell Heads designed to match specific tube arrangements.

In addition to SA249 TP304, we can supply a variety of standard material grades to meet diverse operational requirements. This includes other stainless steel grades like TP304L, TP316, TP316L, TP321, and TP347, ensuring that our clients receive the exact metallurgical match for their specific corrosive or thermal environments.

Due to their excellent corrosion resistance and mechanical stability, our ASME SA249 TP304 welded tubes are widely utilized across various industrial sectors:

• Boilers & Superheaters: For high-temperature steam applications.
• Heat Exchangers: For fluid-to-fluid thermal transfer in chemical and petrochemical plants.
• Condenser Tubes: For efficient cooling systems and power generation units.
• Air Coolers: Utilizing attached finned tubes for ambient cooling processes.

Choosing Yuhong Group for SA249 TP304 tubing provides several practical benefits:

• Precision Fit: We offer custom sizing options outside of standard specifications, adapting to your specific equipment design and supporting smaller diameters as thin as 0.004 in. (0.10 mm) for specific drawing requirements.
• Consistent Quality: Our strict adherence to the original mill scale production parameters guarantees superior bending and welding characteristics during downstream assembly.
• Corrosion Control: We offer supplementary requirements (S1 to S11) such as stress-relieved annealed tubes for service in corrosive environments, tailored to your specific process needs.