Corrugated Tubes for Heat Exchangers – GB/T 13296-2013 S30403 Stainless Steel

Our corrugated tubes for heat exchangers are designed to improve thermal performance in industrial heat-transfer systems where reliable operation, corrosion resistance, and efficient equipment design are important. Manufactured using S30403 low-carbon austenitic stainless steel, these tubes combine the material characteristics of 304L stainless steel with a formed corrugated profile tailored to the customer's heat-exchanger requirements.

The corrugated tube geometry can promote fluid mixing and disrupt boundary-layer development, potentially increasing heat-transfer efficiency compared with a smooth tube under suitable operating conditions. The final performance depends on corrugation geometry, fluid properties, flow rate, pressure drop, and heat-exchanger design.

Product name: Corrugated Tubes for Heat Exchangers
Material grade: S30403 / 022Cr19Ni10
Material standard: GB/T 13296
Standard edition: GB/T 13296-2013, where specified by the purchase order
Material family: Low-carbon austenitic stainless steel, commonly associated with 304L
Product form: Corrugated stainless-steel heat-transfer tubes
Manufacturing route: Seamless base tube with corrugation formed to the agreed design, subject to manufacturing capability and order requirements

Standards note: GB/T 13296-2013 was superseded by GB/T 13296-2023, effective June 1, 2024. The 2013 edition should be specified only where contractually required. Confirm the applicable edition with the buyer before placing an order.

The corrugated profile can promote turbulence and improve fluid-side heat transfer under suitable operating conditions. This may allow equipment designers to achieve a required heat duty within a more compact exchanger, subject to thermal and hydraulic calculations.

S30403 has a low carbon limit, helping reduce the risk of sensitization during appropriate welding and thermal fabrication processes. This is valuable in equipment requiring fabricated stainless-steel components.

The chromium-nickel composition provides resistance to many atmospheric and process environments. Actual service suitability must be assessed against the process medium, chloride concentration, temperature, cleaning chemicals, and operating conditions.

Corrugation pitch, depth, profile, wall thickness, and tube length can be selected to suit the heat-exchanger design. These dimensions should be confirmed through engineering review rather than treated as universal standard values.

The base tube and finished corrugated tube can be inspected through an agreed quality plan covering material traceability, dimensional verification, surface condition, mechanical properties, and applicable pressure or nondestructive tests.

Corrugated stainless-steel tubes may be used in:

• Industrial heat exchangers: Process heating and cooling in chemical and general manufacturing facilities.

• Condensers: Selected vapor-condensation duties where the tube design is suitable for the process and pressure conditions.

• Cooling systems: Industrial liquid-cooling and heat-recovery equipment.

• Petrochemical equipment: Heat-transfer service where the process environment is compatible with 304L stainless steel.

• Energy and utility systems: Selected auxiliary heat exchangers and thermal-management equipment.

• Specialized process equipment: Applications requiring a formed tube profile and stainless-steel construction.

Material selection should be verified for each service. S30403 is not universally suitable for concentrated chlorides, strongly reducing acids, or every high-temperature corrosive environment.

Corrugated-tube dimensions depend on the heat-exchanger design and forming process. The following ranges are indicative manufacturing options, not dimensional limits prescribed by GB/T 13296-2013.

Actual availability depends on tube diameter, wall thickness, corrugation profile, length, tooling, and pressure requirements. Longer lengths or special profiles may be available following technical review.

To prepare an accurate quotation, please specify:

1. Base tube outside diameter and wall thickness.

2. Finished tube length and required length tolerance.

3. Corrugation pitch, depth, and profile.

4. Design pressure and design temperature.

5. Process medium on the tube side and shell side.

6. Required tube-end configuration and surface finish.

7. Applicable inspection, testing, documentation, and certification requirements.

S30403 corresponds to the Chinese grade 022Cr19Ni10, commonly associated with 304L stainless steel. The following table summarizes typical GB/T 13296-2013 composition limits for this grade. Confirm the contractual edition and requirements against the original standard and material test certificate before using these values for acceptance.

The limits above are presented for the 2013 edition. Later editions may revise certain requirements, including sulfur limits. The chemistry shown is for the stainless-steel base material, not a separate corrugation or coating material.

The following values are commonly published for S30403 / 022Cr19Ni10 seamless heat-exchanger tubing under the 2013 specification. The applicable standard edition, product condition, specimen orientation, and testing provisions should be verified before contractual use.

These values describe the base tube material and should not be interpreted as guaranteed properties of every finished corrugated section. Forming may affect local geometry and mechanical response. Additional requirements for finished tubes should be agreed with the manufacturer and buyer.

The stainless-steel base tube is manufactured and supplied to the agreed material specification. Material grade, heat number, dimensions, surface condition, and traceability are checked against the purchase order.

Incoming tubes are checked for dimensional compliance, visible defects, identification, and required material documentation. Chemical analysis and mechanical-test records are reviewed according to the inspection plan.

The tube is formed using suitable tooling to produce the specified corrugation profile. Process parameters are controlled to maintain consistent pitch, depth, dimensional stability, and surface integrity.

After forming, the tubes are inspected and finished according to the agreed specification. End preparation, cleaning, passivation, or other finishing operations are performed when required by the order.

Finished tubes undergo dimensional and visual checks. Applicable pressure tests, nondestructive examinations, and documentation reviews are completed before release. Tubes are protected against handling damage and contamination during packing and transport.

The inspection plan should be selected according to the governing tube standard, finished product design, service conditions, and purchase-order requirements.

Chemical composition is verified using an appropriate laboratory method, such as optical emission spectroscopy or another recognized technique. A material test certificate is provided when specified.

Tensile testing evaluates tensile strength, proof strength, and elongation of the base tube in accordance with the applicable standard and test method.

Hardness testing may be conducted when required by the product specification or inspection plan.

Dimensional checks may include:

• Base tube outside diameter and wall thickness

• Finished tube length

• Corrugation pitch and depth

• Overall straightness and profile consistency

• End dimensions and end preparation

The external and accessible internal surfaces are examined for relevant imperfections, including cracks, folds, dents, handling damage, and other defects that could affect serviceability.

The base tube or finished corrugated tube may require hydrostatic testing, eddy-current testing, or another approved nondestructive method, depending on the applicable standard and design. Test pressure, acceptance criteria, and whether testing occurs before or after corrugation must be agreed in advance.

A suitable leak test may be specified for the finished tube when required by the heat-exchanger design or customer specification.

Documentation can include the material test certificate, inspection report, dimensional report, test records, heat-number traceability, and certificate of conformity, according to the order requirements.

Important: Do not assume that every test listed above is mandatory under GB/T 13296-2013 or that a base-tube test automatically qualifies the finished corrugated tube. The inspection and test plan should explicitly identify the applicable requirements and acceptance criteria.

Our quality approach focuses on maintaining traceability and consistency from the base tube through corrugation forming and final inspection. Inspection activities are aligned with the agreed technical specification, material standard, and project quality plan.

Each order should clearly define the governing standard edition, tube dimensions, corrugation geometry, mechanical and chemical requirements, testing scope, marking, packaging, and documentation deliverables.

S30403 is the unified designation for 022Cr19Ni10, a low-carbon chromium-nickel austenitic stainless steel commonly associated with 304L stainless steel.

No. It is a standard for seamless stainless-steel tubes used in boilers and heat exchangers. Corrugation dimensions and finished-tube requirements should be defined in the drawing, purchase specification, or agreed technical document.

They can improve fluid mixing and heat transfer in suitable designs. The benefit depends on corrugation geometry and operating conditions, and must be evaluated together with the associated pressure drop.

No. GB/T 13296-2023 replaced the 2013 edition and took effect on June 1, 2024. If a project specifically requires the 2013 edition, identify that edition clearly in the contract and inspection documentation.

No. Compatibility depends on fluid chemistry, temperature, chloride concentration, stress conditions, and cleaning practices. Engineering review is recommended for aggressive or uncertain environments.

For a quotation tailored to your heat-exchanger project, provide the required tube diameter, wall thickness, length, corrugation profile, design conditions, quantity, and inspection requirements. We can then review the specification and confirm manufacturing feasibility, testing scope, and documentation.