ASTM A249 TP321 Stainless Steel Welded Condenser Tubes
Standard: ASTM A249/ASME SA249
Material Grades: TP321, S32100, 1.4541, SUS321
Manufacturing Process: ERW, TIG
Tube Type: Welded condenser tubes, heat exchanger tubes
Outer Diameter (OD): 6.35–76.2 mm (1/4"–3")
Wall Thickness (WT): 0.5–3.0 mm
Length: Up to 18 m or customized
Delivery Condition: Solution annealed, bright annealed
Heat Treatment: Solution annealing at 1040–1150°C, followed by rapid water or air cooling
Material Certificate: EN 10204 3.1 / 3.2 Material Test Certificate (MTC) available
Packaging: End caps, waterproof wrapping, wooden cases, plywood cases, steel-strapped export packaging
Send E-mail:info@gneestainless.com
Tel:+8615824687445
Description
Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of ASTM A249 TP321 Stainless Steel Welded Condenser Tubes in China. With abundant experience, we warmly welcome you to wholesale customized ASTM A249 TP321 Stainless Steel Welded Condenser Tubes from our factory. For price consultation, contact us.
If you are looking for high-efficiency condenser tubes that can operate stably for extended periods under conditions of high-temperature thermal cycling, moderate corrosion, and high vibration resistance, TP321 (UNS S32100/EN1.4541) is specifically designed for power plant condensers, shell-and-tube heat exchangers, boilers, and superheaters-equipment with stringent requirements for heat transfer efficiency, thermal strength, and weld reliability.
What is ASTM A249 TP321 stainless steel tube?
ASTM A249 TP321 weldable stainless steel tube is a titanium-stabilized austenitic steel tube. The addition of titanium prevents the precipitation of chromium carbides during welding, completely inhibiting the precipitation of chromium carbides in the sensitization temperature range of 427°C-816°C. This eliminates the risk of intergranular corrosion in the weld heat-affected zone and during high-temperature operation, and provides continuous oxidation resistance up to 800°C-850°C.
Furthermore, ASTM A249 TP321 heat exchanger tubes possess high-temperature creep rupture strength exceeding that of 304L/316L tubes, with a minimum tensile strength of 515 MPa, a minimum yield strength of 205 MPa, elongation ≥35%, and hardness controlled at ≤90 HRB (≤200 HV). High toughness and good plasticity ensure that the tubes are not prone to fatigue fracture under high-frequency fluid-induced vibrations and cyclic thermal stresses in condensers, and also support expansion joints and bending without cracking.
ASTM A249 TP321 Stainless Steel Tube Supplier and Manufacturer
Our ASTM A249 TP321 tubes are manufactured from premium-grade stainless steel strips using high-precision forming and advanced welding techniques, such as TIG (Tungsten Inert Gas) or laser welding. Following the welding process, the tubes undergo solution annealing and pickling (or bright annealing) to eliminate residual welding stresses. The strength and corrosion resistance of the weld seam are fully equal to those of the base metal. Furthermore, the weld-to-base metal hardness ratio is strictly controlled at R ≤ 1.25, ensuring that the weld zone does not become a vulnerable hotspot for corrosion in condenser cooling water environments.
ASTM A249 TP321 Stainless Steel Tube Specification
ASTM A249 TP321 Stainless Steel Welded Tube Chemical Composition
| Grade | C | N | Ni | Si | P | S | Mn | Cr | TI | |
| SS 321 | Min | - | - | 9.00 | - | - | - | - | 17.0 | 5(C+N) |
| max | 0.08 | 0.10 | 12.00 | 1.00 | 0.045 | 0.030 | 2.00 | 19.0 | 0.70 max |
ASTM A249 TP321 Welded Tube Mechanical Properties
| Grade | Tensile Strength (MPa) min | Elongation (% in 50mm) min | Yield Strength 0.2% Proof (MPa) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| SS 321 | 515 | 40 | 205 | 95 | 217 |
ASTM A249 Stainless Steel Heat Exchanger Tube Tolerances
| Standard | OD(mm) | WT(mm) | Length(meters) | Grade |
| ASTM A249, | 15.88 to 114.3 | 0.3 to 4.0 | Up to 18.3 meter | AISI 304/304l/316l,321 |
| Standard | Outside Diameter | Thickness | Length | |
| ASTM A249 (A1016) |
<25.4 | ±0.10 | ±10%S | OD<50.8+3-0 OD≥50.8+5-0 |
| ≥25.4~<38.1 | ±0.15 | |||
| ≥38.1~<50.8 | ±0.20 | |||
| ≥50.8~<63.5 | ±0.25 | |||
| ≥63.5~<76.2 | ±0.31 | |||
ASTM A249 TP321 Stainless Steel Tubes HS Code
| Item | HS Code | |
|---|---|---|
| Product Name | ASTM A249 TP321 Stainless Steel Tubes | 7306.40 |
| Material | TP321 / UNS S32100 Stainless Steel | - |
| Product Type | Welded Stainless Steel Tubes | - |
| Cross-Section | Circular | - |
| HS Heading | Other tubes, pipes and hollow profiles, welded, of iron or steel | 7306 |
| HS Subheading | Other welded tubes, of circular cross-section, of stainless steel | 7306.40 |
| China Export HS Code | Stainless steel welded circular tubes | 7306400000 |
| Customs Description | Other welded tubes, of circular cross-section, of stainless steel | 7306.40 |
If you need more details, let me know if you are looking for:
Standard pipe dimensions or wall thickness sizes
Mechanical and chemical property
limitsTesting or inspection criteria (hydrostatic, eddy current, etc.)
Applications
Heaters, boilers, superheaters, heat exchangers, condensers, and dairy/food processing equipment - anywhere welding plus elevated-temperature service would sensitize unstabilized austenitic grades.
ASTM A249 TP321 Stainless Steel Welded Tubes price per ton
ASTM A249 TP321 stainless steel welded tubes generally cost between $1,800 and $7,400 per metric ton. Global wholesale and factory FOB pricing vary heavily based on order volume, wall thickness, outer diameter specifications, and current titanium-stabilized alloy surcharges.
Contact us now for a free estimate. info@gneestainless.com
SS S32100 Welded Tubing inspection
Flattening Test: Checks whether the weld seam cracks when the pipe is deformed under compression.
Flaring Test: Ensures the pipe does not fracture during expansion into the tubesheet.
Reverse Flattening Test: Specifically used to evaluate the fusion quality at the weld root.
Hardness Test: The hardness of TP321 is typically required not to exceed 90 HRB.
Hydrostatic or Nondestructive Electric Test (Eddy Current): 100% testing to detect leaks or invisible flaws in the weld.
GNEE PACKAGING AND SHIPPING
Each ASTM A249 TP321 stainless steel condenser and heat exchanger tube is fitted with protective plastic end caps to prevent contamination and mechanical damage during transit. The tubes are wrapped in a waterproof, moisture-resistant film and securely strapped with steel bands before being packed into sturdy fumigated wooden crates or export-grade plywood boxes to ensure optimal protection. Each package is clearly marked with the heat number, dimensions, specifications, quantity, and purchase order details to ensure full traceability.
FAQ
What is the difference between TP321 and TP304?
In the temperature range of 427°C to 816°C (800°F to 1500°F), TP304 is prone to "sensitization," which leads to intergranular corrosion; in contrast, thanks to the protective effect of titanium, TP321 maintains excellent resistance to intergranular corrosion even during prolonged operation or welding within this temperature range.
How is the weld bead managed in A249 TP321 welded tubes?
According to ASTM A249 standards, welded tubes must undergo cold working before heat treatment, typically sinking or drawing.
Smoothing: The inner weld bead is usually flattened or removed (bead worked) to smooth the inner and outer diameters of the tube, reducing turbulence and scale corrosion during fluid flow, which is crucial for condenser heat exchange efficiency.
Which welding consumables are used for TP321?
ER321 or ER347 (niobium-stabilized) welding wire is typically used in the manufacture of welded tubes or for field repairs. They provide corrosion resistance and mechanical properties matching the base material.
How to ensure the received pipes comply with TP321 standards?
Check the Material Certificate (MTC): Confirm that the Ti content in the chemical composition meets the requirement of 5 × (C + N).
Intergranular corrosion test: It is recommended to require an intergranular corrosion test according to ASTM A262 Practice E. This is the most direct method to verify the "stabilization" effect of TP321.
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