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Quality ASTM A249 ASME SA249 Welded Stainless Steel Tube For Heat Exchangers factory
Quality ASTM A249 ASME SA249 Welded Stainless Steel Tube For Heat Exchangers factory

ASTM A249 ASME SA249 Welded Stainless Steel Tube For Heat Exchangers

Basic Properties
Place of Origin: MADE IN CHAINA
Brand Name: Baosteel，TISCO
Certification: EN 10204 Type 3.1 / 3.2 available
Model Number: 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507
Trading Properties
Minimum Order Quantity: 100kg
Price: Negotiable (Request a Quote)
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Ability: 10000tons
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Molybdenum Alloy Stainless Steel Pipe

Stainless Steel Pipe Chloride Resistance

ASTM A249 Welded Stainless Steel Tube
Product Summary
Welded stainless steel tube is manufactured by forming stainless steel strip into a tube shape and longitudinally welding the seam using automatic GTAW (Tungsten Inert Gas) or laser welding processes. After welding, the tube undergoes solution annealing and NDT testing to ensure weld integrity and ...

Product Details

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ASTM A249 Welded Stainless Steel Tube

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ASME SA249 Welded Stainless Steel Tube
Country Of Origin: MADE IN CHAINA
Brand: Baosteel，TISCO
Certifications: ISO/EN 10204 Type 3.1 / 3.2 Available
Grade: 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 / 630 (17-4PH)
MOQ: 100kg
Price: Negotiable (Request A Quote)
Packaging: Wooden Case / Wooden Pallet / Steel Frame / Carton / Woven Bag
Delivery Time: 15-25days
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Capacity: 10000tons
Product Description

Welded stainless steel tube is manufactured by forming stainless steel strip into a tube shape and longitudinally welding the seam using automatic GTAW (Tungsten Inert Gas) or laser welding processes. After welding, the tube undergoes solution annealing and NDT testing to ensure weld integrity and consistent corrosion resistance.

Welded tubes offer a cost-effective alternative to seamless tubes for applications not requiring the extreme pressure ratings or critical service conditions of seamless construction. They provide excellent dimensional accuracy, smooth surface finish, and reliable performance in general industrial, instrumentation, heat exchanger, and process piping applications.

Key Specifications
Parameter Range / Details
Standard ASTM A249 / ASME SA249
Manufacturing Type Welded (ERW / GTAW); Heavily Cold Worked (HCW) optional
Available Grades TP304, TP304L, TP304H, TP309S, TP310S, TP316, TP316L, TP316H, TP321, TP347, TP348, and others
Outside Diameter (OD) 6.0 mm – 304.8 mm (0.236″ – 12″)
(Other dimensions permitted if all standard requirements are met)
Wall Thickness (WT) 0.4 mm – 8.1 mm (0.015″ – 0.320″)
Length Fixed length or random length (as specified)
Delivery Condition Annealed & Pickled (AP), Bright Annealed (BA), Polished, Cold Drawn
Surface Finish BA, 2B, No.4, No.1, No.3, No.8, 8K, HL, 2D, 1D, Mirror Polished, 180G, 320G, 400G, etc.
Non-Destructive Testing 100% Eddy Current Test (ET) or Hydrostatic Test (per A1016 requirements)
Value-Added Services Cutting to length, Beveling, Threading, Polishing, Bending, Tube expansion
Available Grades & Chemical Composition (Typical, wt%)
Grade C ≤ Mn ≤ P ≤ S ≤ Si ≤ Cr Ni
TP304 0.08 2.00 0.045 0.030 1.00 18.0–20.0 8.0–11.0
TP304L 0.035 2.00 0.045 0.030 1.00 18.0–20.0 8.0–12.0
TP304H 0.04–0.10 2.00 0.045 0.030 1.00 18.0–20.0 8.0–11.0
TP316 0.08 2.00 0.045 0.030 1.00 16.0–18.0 11.0–14.0 (Mo 2.0–3.0)
TP321 0.08 2.00 0.045 0.030 1.00 17.0–19.0 9.0–12.0 (Ti ≥ 5*C%)

Grade Notes:

  • “H" grades (TP304H / TP316H / TP321H / TP347H) are specifically designed for high-temperature service (e.g., superheaters and reheaters), offering improved creep rupture strength.

  • “L" grades (TP304L) have lower carbon content, providing better resistance to intergranular corrosion after welding.

Mechanical Properties (Solution Annealed Condition)
Grade Tensile Strength (MPa) min Yield Strength (MPa) min Elongation % min
TP304 / TP304H 515 205 35
TP304L 485 170 35
TP316 / TP316H 515 205 35
TP321 515 205 35
TP347 515 205 35

Heat Treatment Requirement: Tubes shall be supplied in the solution annealed condition, typically heated to a minimum of 1900°F (1040°C) followed by rapid cooling.

Dimensions & Tolerances (per ASTM A1016/A1016M)
Parameter Tolerance
Outside Diameter (OD) ±0.2mm (or as agreed)
Wall Thickness (WT) ±10% (or as agreed)
Length ±10mm
Typical Applications
Industry Specific Application Recommended Grade
Boilers & Superheaters High-pressure steam lines, reheater tube bundles TP304H, TP316H, TP321H
Heat Exchangers Shell-and-tube, plate heat exchanger cores TP304/L, TP316/L
Condensers Power plant, chemical plant, condenser tube bundles TP304, TP316
Hydraulic & Pneumatic Systems Precision hydraulic tubing TP304/L (cold drawn)
Petrochemical Process furnace tubes, catalyst lines TP321, TP347
Food & Pharmaceutical Sanitary heat exchangers, sterile piping TP304/L (polished/electropolished ID)
Nuclear Power Auxiliary piping systems TP304H (special requirements)
Why Choose Welded Tube (for Heat Exchanger & Boiler Service)?
Feature Advantage
Uniform wall thickness High-dimensional accuracy, stable heat transfer efficiency
Smooth inner surface Low pressure drop, reduced fouling, suitable for clean media
Cost-effective More economical than seamless tubes for equivalent sizes
High customizability Flexible production of small-diameter, thin-wall tubes
Reliable NDT Welds can be 100% Eddy Current or Radiographic tested
Quality Control & Testing

All tubes are tested in accordance with ASTM A1016/A1016M general requirements, including:

  • Chemical analysis (per heat)

  • Tensile test

  • Flattening test

  • Flaring test

  • Reverse flattening test (if applicable)

  • Non-Destructive Testing:

    • 100% Eddy Current Test (ET)

    • or 100% Hydrostatic Test

    • Optional: Radiography (RT) for critical welds

Certificates Available:

  • Manufacturer’s Test Certificate (EN 10204 3.1)

  • Third-party inspection report (SGS, BV, TUV – upon request)

  • Heat treatment records

  • 100% Radiography Test Report (if applicable)

  • DFARS compliance statement (if required)

Surface Finish Options
Finish Code Description Typical Application
1D / No.1 Hot rolled, annealed & pickled General industrial heat exchangers
2D Cold rolled, dull finish Moderate surface requirements
2B Cold rolled, bright finish General bright surface
BA Bright Annealed (protective atmosphere) Clean, demanding applications
No.4 Brushed finish (120-320 grit) Sanitary, food grade
No.8 / Mirror High gloss reflective Decorative, semiconductor
Electropolished Removes micro-burrs, enhances passivation Pharmaceutical, biotechnology
Packaging & Logistics

  • Packaging: PE fabric bundles, plywood wooden cases, or standard seaworthy export packing

  • Protection: Plastic caps on ends (if applicable), moisture-proof lining inside

  • Marking: Grade, size, heat number, standard clearly labeled

  • Port of Loading: As agreed (e.g., Qingdao, Shanghai – major ports)

Ordering Information

The following requirements should be specified by the purchaser at the time of ordering:

  1. Quantity (feet, meters, or number of lengths)

  2. Name of material – Welded tubes (WLD) or Heavily Cold Worked tubes (HCW)

  3. Grade (per Standard Table 1)

  4. Size (outside diameter and nominal wall thickness)

  5. Length (specific or random)

  6. Optional requirements (e.g., special finish, testing)

  7. Test report required

  8. Specification designation (ASTM A249/A249M)

  9. Special requirements and supplementary requirements (if any)

Welded Tube Manufacturing Process
Step Description
1. Raw Material Stainless steel coil strip (precision width)
2. Forming Continuous roll forming into a tubular shape
3. Welding GTAW or laser welding (no filler metal typically)
4. Weld Bead Conditioning Internal and external bead removal (if required)
5. Solution Annealing Full tube heat treatment to restore corrosion resistance
6. Sizing & Straightening Precision sizing and straightening rollers
7. NDT Testing Eddy current or hydrostatic test (100% weld inspection)
8. Cutting Cut to the specified length
9. Finishing Pickling, polishing, or bright annealing
10. Final Inspection Dimensional and visual check
Surface Finishes
Finish Code Description Application
Pickled — Oxide scale removed, matte surface General industrial, heat exchangers
Annealed — Softened condition Forming, further processing
Polished — Mechanical polish (120-600 grit) Instrumentation, architectural
Bright Annealed BA Clean, shiny surface Clean service, pharmaceutical
Mirror Polished 8K Highly reflective Decorative, luxury applications

 

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