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ASTM A789 Seamless Welded SS Precision Pipe For Heat Exchangers Instrumentation Lines

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ASTM A789 Seamless Welded SS Precision Pipe For Heat Exchangers Instrumentation Lines

Brand Name : Baosteel，TISCO

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

Certification : EN 10204 Type 3.1 / 3.2 available

Place of Origin : MADE IN CHAINA

MOQ : 100kg

Price : Negotiable (Request a Quote)

Payment Terms : T/T，D/P，D/A，Western Union，PayPal

Supply Ability : 10000tons

Delivery Time : 15-25days

Packaging Details : Wooden pallets, wooden crates, woven bags, etc.

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

Packaging : Wooden Case / Wooden Pallet / Steel Frame / Carton / Woven Bag

Supply Capacity : 10000tons

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ASTM A789 seamless and welded tube is a standard specification for general-service duplex stainless steel tubes, covering both seamless and welded construction. These tubes are intended for applications requiring high strength, excellent corrosion resistance, and reliability in aggressive environments.

ASTM A789 tubes are available in a range of duplex grades, including standard duplex 2205, super duplex 2507, lean duplex, and other specialty grades. They are widely used in heat exchangers, condensers, instrumentation lines, hydraulic systems, and process piping across oil & gas, chemical processing, marine, and desalination industries.

Key Features
Feature Description
Standard ASTM A789 / ASME SA789
Construction Types Seamless and welded (longitudinally welded)
Available Grades 2205, 2507, 2304, S31803, S32205, S32750, S32760
Microstructure Austenitic + Ferritic (dual-phase)
Yield Strength 400 – 550 MPa depending on grade
PREN 25 – 42 depending on grade
Corrosion Resistance Excellent against SCC, pitting, and crevice corrosion
Temperature Range Up to 600°F (316°C) continuous service
Available Grades
Grade UNS Type Yield Strength (min) PREN Key Application
2304 S32304 Lean Duplex ≥400 MPa ~25 Cost-effective alternative to 304/316
2205 S32205 / S31803 Standard Duplex ≥450 MPa ≥35 Most widely used: heat exchangers, process lines
2507 S32750 Super Duplex ≥550 MPa ≥42 Extreme environments; subsea, high chloride
S32760 S32760 Super Duplex (Z100) ≥550 MPa ≥40 Offshore, seawater, sour service
Equivalent Designations
Grade ASTM UNS EN JIS
2304 S32304 1.4362 SUS329J3L
2205 S32205 / S31803 1.4462 SUS329J3L
2507 S32750 1.4410 SUS329J4L
S32760 S32760 1.4501 —
Specifications & Size Range
Parameter Seamless Tube Welded Tube
Outer Diameter (OD) 6.0 mm – 219.1 mm 6.0 mm – 219.1 mm
Wall Thickness (WT) 0.5 mm – 15 mm 0.5 mm – 8 mm
Length 6.0 m random; custom lengths available 6.0 m random; custom lengths available
Manufacturing Process Cold-drawn seamless longitudinally welded (automatic GTAW)
Surface Condition Pickled, annealed, polished Pickled, annealed, polished
Seamless vs. Welded Tube Comparison
Feature Seamless Tube Welded Tube
Construction No weld seam Longitudinal weld
Pressure Rating Higher Slightly lower
Cost Higher Lower (10-20% less)
Lead Time Longer Shorter
Size Availability Limited in large diameters More flexible
Weld Integrity N/A 100% NDT tested
Best For High pressure, sour service, critical applications General service, heat exchangers, cost-sensitive projects
Corrosion Resistance Highlights
Corrosion Type 2205 Performance 2507 Performance
Pitting / Crevice Excellent (PREN ≥35) Very High (PREN ≥42)
Stress Corrosion Cracking Highly resistant Very highly resistant
General Corrosion Superior to 316L Superior to 2205
Seawater Resistance Good Excellent
H₂S Sour Service NACE MR0175 compliant NACE MR0175 compliant
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Product Tags:

Seamless SS Precision Pipe

      

Welded SS Precision Pipe

      

ASTM A789 SS Precision Pipe

      
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