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Quality Acid Resistant SS316 Seamless Pipe Low Carbon Superior Resistance To Sulfuric factory
Quality Acid Resistant SS316 Seamless Pipe Low Carbon Superior Resistance To Sulfuric factory
Quality Acid Resistant SS316 Seamless Pipe Low Carbon Superior Resistance To Sulfuric factory
Quality Acid Resistant SS316 Seamless Pipe Low Carbon Superior Resistance To Sulfuric factory

Acid Resistant SS316 Seamless Pipe Low Carbon Superior Resistance To Sulfuric

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

Acid Resistant SS316 Seamless Pipe
Product Summary
Acid-resistant 316 seamless tube is a premium austenitic stainless steel product specifically designed for service in acidic and chemically aggressive environments. The addition of 2-3% molybdenum distinguishes this grade from standard 304, providing significantly enhanced resistance to a wide range ...

Product Details

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Acid Resistant SS316 Seamless Pipe

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SS316 Seamless Pipe Low Carbon
Custom Cycle: 7-15 Days
Size: 10mm-120mm
Productname: Stainless Steel Pipe
Lenght: 1-12m, Or As Requirement
Width: 20-150mm
Loading Port: Shanghai Port
Specification: Customized
Material Grade: 300 Series
Processing Service: Cutting
Size Range: 139mm-1600mm
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

Acid-resistant 316 seamless tube is a premium austenitic stainless steel product specifically designed for service in acidic and chemically aggressive environments. The addition of 2-3% molybdenum distinguishes this grade from standard 304, providing significantly enhanced resistance to a wide range of acids, including sulfuric, phosphoric, acetic, and organic acids, as well as chloride-induced pitting and crevice corrosion.

The seamless manufacturing process ensures uniform wall thickness, consistent mechanical properties, and a complete absence of a longitudinal weld seam. This seamless construction eliminates potential weak points associated with welded seams, making acid-resistant 316 seamless tube the preferred choice for chemical processing plants, pharmaceutical facilities, food processing equipment, and industrial acid handling systems.

The low carbon version (316L) with 0.03% maximum carbon content prevents carbide precipitation during welding, ensuring optimal corrosion resistance in the heat-affected zone without requiring post-weld heat treatment. For most acid service applications, 316L is recommended due to its superior resistance to intergranular corrosion in welded conditions.

The molybdenum content provides excellent resistance to reducing acids, while the chromium content offers protection in oxidizing environments. This dual-protection mechanism makes 316 one of the most versatile acid-resistant stainless steels available, suitable for handling a broad spectrum of corrosive chemicals across a wide temperature range.

Product Parameters
Parameter Details
Product Name Acid-Resistant 316 Seamless Tube
Grades 316 (UNS S31600) / 316L (UNS S31603)
Dual Certification 316/316L (meets both specifications)
EN Equivalents 1.4401 (316) / 1.4404 (316L)
Standards ASTM A269, ASTM A213, ASTM A312, ASME SA213, ASME SA312
Form Seamless Tube / Seamless Pipe (SMLS)
Manufacturing Process Cold drawn seamless (CDS) or hot finished seamless
Outer Diameter Range 3.18mm (1/8") to 219mm (8") – larger sizes on request
Wall Thickness Range 0.5mm – 15mm (SCH 5S to SCH 160)
Length Single random (3-6m), double random (6-12m), or exact cut
Tube Ends Plain End (PE), Beveled End (BE), or Threaded
Surface Finish Annealed & pickled, bright annealed, polished (180# to 600#)
Packing Method Plastic end caps, steel strapping, waterproof paper, wooden crates
Certification Mill Test Certificate EN 10204 Type 3.1 or 3.2
Third-Party Inspection SGS, BV, Intertek available
Chemical Composition

The molybdenum content is the critical element for acid resistance.

316 (UNS S31600)
Element Content (% by weight)
Carbon (C) 0.08 max
Manganese (Mn) 2.00 max
Silicon (Si) 0.75 max
Phosphorus (P) 0.045 max
Sulfur (S) 0.030 max
Chromium (Cr) 16.00 – 18.00
Nickel (Ni) 10.00 – 14.00
Molybdenum (Mo) 2.00 – 3.00
Iron (Fe) Balance
316L (UNS S31603) – Recommended for welded acid service
Element Content (% by weight)
Carbon (C) 0.030 max
Manganese (Mn) 2.00 max
Silicon (Si) 0.75 max
Phosphorus (P) 0.045 max
Sulfur (S) 0.030 max
Chromium (Cr) 16.00 – 18.00
Nickel (Ni) 10.00 – 14.00
Molybdenum (Mo) 2.00 – 3.00
Iron (Fe) Balance
Mechanical Properties

Acid-resistant 316 seamless tube delivers the following mechanical properties in the solution annealed condition:

Property 316 316L
Tensile Strength 515 MPa (75 ksi) min 485 MPa (70 ksi) min
Yield Strength (0.2% offset) 205 MPa (30 ksi) min 170 MPa (25 ksi) min
Elongation (2" or 50mm) 35% min 35% min
Hardness (Rockwell B) 95 HRB max 95 HRB max
Modulus of Elasticity 193 GPa 193 GPa
Density 7.98 g/cm³ 7.98 g/cm³

High-Temperature Tensile Strength (Typical values for 316L):

Temperature (°C) Tensile Strength (MPa) Yield Strength (MPa)
20°C 580 250
200°C 510 190
300°C 500 170
400°C 490 160
500°C 480 150
Acid Resistance Performance

The molybdenum content provides superior resistance to a wide range of acids.

Sulfuric Acid (H₂SO₄)
Concentration Temperature Limit Performance
< 10% Up to 50°C Good
10-20% Up to 40°C Moderate
20-80% Not recommended Poor
> 80% Ambient Good

316 is suitable for dilute sulfuric acid at moderate temperatures. For concentrated or high-temperature sulfuric acid, higher alloys (904L, Hastelloy) are required.

Phosphoric Acid (H₃PO₄)
Condition Performance
Pure phosphoric acid, any concentration Excellent
Commercial phosphoric acid (with impurities) Good
High-temperature phosphoric acid Moderate

316 is widely used in phosphoric acid production, fertilizer plants, and food-grade phosphoric acid handling.

Acetic Acid (CH₃COOH)
Concentration Temperature Performance
All concentrations Up to boiling Excellent
With chlorides present Reduce limit Good to Moderate

316 is the standard material for acetic acid production and handling in the chemical and food industries.

Organic Acids (Citric, Lactic, Tartaric, etc.)
Acid Performance
Citric Acid Excellent (room temp), Good (elevated)
Lactic Acid Excellent
Tartaric Acid Excellent
Formic Acid Good (dilute), Moderate (concentrated)
Nitric Acid (HNO₃)
Condition Performance
All concentrations, ambient temperature Good
High-temperature nitric acid 304 preferred (316 may be susceptible)

For high-temperature nitric acid service, 304 or 304L is typically preferred over 316.

Hydrochloric Acid (HCl)
Concentration Performance
Any concentration, ambient Not recommended
Dilute, low temperature Poor

316 has limited resistance to hydrochloric acid. Higher alloys (Hastelloy C-276, zirconium) are required for HCl service.

Applications

Acid-resistant 316 seamless tubes are used across industries where acidic media handling is required.

Chemical Processing

  • Sulfuric acid transfer lines (dilute concentrations)

  • Phosphoric acid plant piping

  • Acetic acid production and handling systems

  • Organic acid processing equipment

  • Dye and intermediate chemical transfer lines

  • Reactor and heat exchanger tubing

Pharmaceutical Industry

  • Acidic formulation transfer lines

  • Clean-in-place (CIP) systems using acid rinses

  • Fermentation and bioreactor tubing

  • Solvent and reagent transfer lines

Food and Beverage

  • Acidic food processing (tomato, citrus, vinegar)

  • Beverage handling systems (fruit juices, soft drinks)

  • Brewery and winery acid cleaning systems

  • Dairy processing (lactic acid exposure)

Fertilizer Production

  • Phosphoric acid service

  • Ammonium phosphate slurry lines

  • Acid recycle and recovery systems

Metal Processing and Finishing

  • Pickling acid lines (dilute sulfuric or hydrochloric with inhibitors)

  • Acid recovery and regeneration systems

  • Electroplating and anodizing acid lines

Pulp and Paper

  • Bleach plant acid lines

  • Chlorine dioxide generator tubing

  • Acid washing systems

Manufacturing Process

The seamless manufacturing process for acid-resistant tubes ensures consistent quality.

  1. Step 1 – Billet Piercing

    Solid billets of 316/316L composition are heated and pierced to form a hollow shell.

  2. Step 2 – Cold Drawing

    The hollow shell is cold drawn through a die and over a mandrel. Multiple passes with intermediate annealing achieve precise dimensions.

  3. Step 3 – Solution Annealing

    The tube is heated to 1010-1120°C (1850-2050°F) and water quenched to dissolve carbides.

  4. Step 4 – Pickling

    Acid pickling removes scale and restores corrosion resistance.

  5. Step 5 – Straightening and Finishing

    The tube is straightened, cut to length, and ends finished.

Surface Finishes
Finish Description Best For
Annealed & Pickled (AP) Scale removed, matte finish Chemical process piping
Bright Annealed (BA) Oxide-free, bright surface Pharmaceutical, clean service
Polished (180-600#) Mechanically polished Food, dairy, cosmetic applications
Comparison: Acid-Resistant Grades
Property 304 316/316L 904L Hastelloy C-276
Molybdenum % 0 2-3 4-5 15-17
Sulfuric Acid (dilute) Poor Moderate Good Excellent
Phosphoric Acid Moderate Good Excellent Excellent
Acetic Acid Good Excellent Excellent Excellent
Hydrochloric Acid Not suitable Not suitable Moderate Excellent
Chloride Pitting Low Good Excellent Excellent
Relative Cost 1.0x 1.2-1.4x 2.5x 4.5-5.5x
Contact Us

For inquiries, technical data sheets, or a quotation for acid-resistant 316 seamless tube (316L seamless tube / molybdenum-bearing austenitic tube) for chemical and corrosive service, please contact our sales team.

We provide:

  • Mill test certificates with full traceability

  • 316L option for welded acid service

  • Competitive pricing for project quantities

  • Reliable delivery worldwide

  • Technical support for material selection

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