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Quality TIG Stainless Steel Welded Pipe ASTM A269 Polished Electropolished Finish factory
Quality TIG Stainless Steel Welded Pipe ASTM A269 Polished Electropolished Finish factory

TIG Stainless Steel Welded Pipe ASTM A269 Polished Electropolished Finish

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

TIG Stainless Steel Welded Pipe
Product Summary
The TIG Welded Stainless Steel Pipe is manufactured using Tungsten Inert Gas (GTAW) welding technology, which produces a high-quality, consistent longitudinal weld seam with excellent penetration and minimal heat input. This process results in a smooth, clean weld bead with no spatter or oxidation, ...

Product Details

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TIG Stainless Steel Welded Pipe

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Stainless Steel Welded Pipe ASTM A269

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SS Welded Pipe Electropolished
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

The TIG Welded Stainless Steel Pipe is manufactured using Tungsten Inert Gas (GTAW) welding technology, which produces a high-quality, consistent longitudinal weld seam with excellent penetration and minimal heat input. This process results in a smooth, clean weld bead with no spatter or oxidation, making it ideal for applications requiring superior weld integrity and corrosion resistance. TIG welded pipes are widely used in sanitary, pharmaceutical, food processing, and high-purity industries where weld quality and surface finish are critical. Available in a range of austenitic stainless steel grades and surface finishes.

Product Specifications
ParameterDetails
StandardsASTM A269, A312, A249; ASME BPE; EN 10217-7; JIS G3459
Available Grades304, 304L, 316, 316L, 316Ti, 321, 347
Outer Diameter6 mm – 610 mm (1/8″ – 24″ NPS)
Wall Thickness0.5 mm – 6.0 mm
Length3m, 6m, or custom lengths up to 12m
Welding ProcessTIG (GTAW) – Autogenous or with filler wire
Weld SeamSingle longitudinal seam
Shielding GasArgon (100%) or Argon-Helium mix
Heat TreatmentAnnealed after welding (standard)
Surface FinishMill finish, pickled, brushed, polished (180-600 grit), or electropolished
End FinishPlain ends, beveled ends, or sanitary tri-clamp ends
Chemical Composition (Typical Values, %)
GradeC ≤Si ≤Mn ≤P ≤S ≤CrNiMo
304L0.030.752.000.0450.03018.0-20.08.0-12.0–
316L0.030.752.000.0450.03016.0-18.010.0-14.02.0-3.0
316Ti0.080.752.000.0450.03016.0-18.010.0-14.02.0-3.0

Composition per ASTM A269 / A312.

Mechanical Properties (at Room Temperature)
GradeTensile Strength (MPa) minYield Strength (MPa) minElongation (%) minHardness (HRB) max
304L4851703592
316L4851703595
316Ti5152053595

Tested in accordance with ASTM E8 / E8M.

Key Features

High Quality Weld – Smooth, clean weld bead with no spatter
Narrow Heat Affected Zone (HAZ) – Minimal distortion and oxidation
Excellent Corrosion Resistance – Preserved through inert gas shielding
Good Surface Finish – Smooth internal and external surfaces
Sanitary Grade Available – Suitable for food, pharma, biotech applications
Autogenous Welding Option – No filler metal for ultra-clean applications
100% Weld Inspection – Hydrostatic or eddy current tested
Annealed After Welding – Restores full corrosion resistance

TIG Welding Advantages
FeatureBenefit
No spatterClean weld zone, no post-weld cleaning required
Precise heat controlMinimal distortion, suitable for thin walls
Inert gas shieldingPrevents oxidation, maintains corrosion resistance
Smooth weld beadIdeal for sanitary and high-purity applications
Autogenous weldingNo filler metal for ultra-clean welds
Full penetrationStrong, leak-proof weld seam
Dimensional Tolerances (ASTM A269 / A312)
ParameterTolerance
Outer diameter±0.1 mm for OD ≤ 25 mm; ±0.4% for larger
Wall thickness±10%
Length (fixed)+0 / -3 mm
Straightness0.15% of total length
Weld bead height≤ 0.2 mm internal
Surface Finish Options
FinishGritDescriptionApplication
Mill FinishAs-weldedOxide scale presentIndustrial, concealed
PickledAcid-treatedClean matte surfaceChemical, marine
Brushed / Satin180-240Directional grainGeneral purpose
Polished320-400Semi-reflectiveFood equipment
Fine Polished600Smooth, low RaPharmaceutical
ElectropolishedN/AMirror-like, ultra-smoothBiotech, high-purity
Applications
Food & Beverage

Dairy process lines
Brewery transfer lines
Beverage dispensing systems
Edible oil piping

Pharmaceutical & Biotech

Purified water (PW) and WFI systems
Clean steam lines
Bioreactor process piping
Sanitary transfer lines

Chemical & Petrochemical

High-purity chemical transfer
Solvent and intermediate lines
Heat exchanger tubing

Semiconductor

Ultra-high-purity gas lines
Chemical delivery systems

Cosmetic & Personal Care

Product transfer lines
Sanitary utility piping

TIG Welded vs. Other Welded Pipe
PropertyTIG WeldedERW WeldedLaser Welded
Weld qualityExcellentGoodExcellent
Heat inputLowMediumVery low
Weld bead smoothnessVery smoothModerateVery smooth
Oxidation controlExcellent (gas shield)LimitedExcellent
Thin wall capabilityExcellentGoodExcellent
CostMediumLowHigh
Typical applicationsSanitary, pharma, foodIndustrial, utilityHigh precision

Contact Us
For inquiries, technical datasheets, or custom sizes, please contact our sales team.

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