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Quality 316 Stainless Steel Welded Pipe Chloride Corrosion Resistant Molybdenum Containing Austenitic Industrial Pipe factory
Quality 316 Stainless Steel Welded Pipe Chloride Corrosion Resistant Molybdenum Containing Austenitic Industrial Pipe factory

316 Stainless Steel Welded Pipe Chloride Corrosion Resistant Molybdenum Containing Austenitic Industrial Pipe

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

316 Stainless Steel Welded Pipe
Product Summary
316 stainless steel welded pipe is manufactured by roll-forming stainless steel coil or plate into a tubular shape, followed by longitudinal welding. As a molybdenum-bearing austenitic stainless steel grade, it offers significantly improved resistance to chloride pitting and crevice corrosion ...

Product Details

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316 Stainless Steel Welded Pipe

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Stainless Steel Welded Pipe Chloride Resistant
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

316 stainless steel welded pipe is manufactured by roll-forming stainless steel coil or plate into a tubular shape, followed by longitudinal welding. As a molybdenum-bearing austenitic stainless steel grade, it offers significantly improved resistance to chloride pitting and crevice corrosion compared to 304 stainless steel, while maintaining good high-temperature strength and workability.

316 ss welded pipe is produced from high-quality stainless steel coil using automated welding processes, followed by solution annealing to restore corrosion resistance and eliminate welding residual stresses. The addition of molybdenum (2.0–3.0%) makes this material particularly effective in aggressive corrosive environments, especially those containing chlorides.

Applicable Standards

316 pipe is manufactured and supplied according to the following standards:

Standard Scope
ASTM A312 Austenitic stainless steel welded pipe for pressure, high-temperature, and corrosive service
ASTM A358 Electric-fusion-welded pipe for high-temperature service
ASTM A778 Welded pipe for general corrosive service
ASME B36.19 Stainless steel pipe dimensions
EN 10217-7 Welded stainless steel pipe for pressure purposes (European standard)
JIS G3459 Stainless steel pipe (Japanese standard)
GB/T 12771 Welded stainless steel pipe for fluid handling (Chinese standard)
Manufacturing Process

Raw Material – Stainless steel coil or plate conforming to ASTM A240, grade 316/316L austenitic stainless steel

Forming & Welding – The steel strip is continuously roll-formed into a tubular shape, and the longitudinal seam is welded using automated methods. Common welding processes include TIG (GTAW), plasma arc welding (PAW), and laser welding. Welding is performed under protective atmosphere to prevent oxidation of the weld metal and ensure weld corrosion resistance.

Post-Weld Treatment – Solution annealing (1040–1120°C) to relieve internal stresses, homogenize the metallurgical structure, and restore maximum corrosion resistance. Inner and outer weld beads are removed to create a smooth inner surface and reduce flow resistance. Surface finishing options include pickling, passivation, and polishing (#4, #6, #8 mirror finish) as required.

Inspection & Testing – Chemical composition analysis, mechanical property testing, hydrostatic testing or non-destructive testing (eddy current / ultrasonic), intergranular corrosion testing, dimensional inspection.

Product Classification
Classification Description
By application Fluid handling pipe, chemical piping, marine pipe, heat exchanger tube, sanitary pipe
By shape Round pipe, square pipe, rectangular pipe
By surface finish Pickled, annealed, polished (6K/8K mirror), brushed
General Specifications
Parameter Details
Product Name 316 Stainless Steel Welded Pipe / 316L Stainless Steel Welded Pipe
Applicable Standards ASTM A312, EN 10217-7, JIS G3459, GB/T 12771
Material Grade 316, 316L (UNS S31600 / S31603)
Manufacturing Type Welded pipe (longitudinally welded)
OD Range 12.0mm – 3000mm (custom available)
Wall Thickness Range 0.5mm – 30.0mm (custom available)
Length 6m fixed length, or cut to size (5.8M, 6M, 11.8M, 12M, etc.)
Surface Finish Pickled, annealed, brushed, polished (6K/8K mirror)
End Finish Plain ends, beveled ends, threaded, grooved
Common Dimensions Table (Round Pipe)

Common dimensions for 316 stainless steel welded pipe are as follows:

Nominal Bore DN OD (mm) Wall Thickness (mm) Range Common WT (mm)
DN15 21.3 0.8-2.5 1.5, 2.0
DN20 26.7 0.8-2.5 1.5, 2.0
DN25 33.4 1.0-3.0 1.5, 2.0, 2.5
DN32 42.2 1.0-3.0 1.5, 2.0, 2.5
DN40 48.3 1.0-3.5 1.5, 2.0, 2.5
DN50 60.3 1.2-4.0 1.5, 2.0, 2.5, 3.0
DN65 76.1 1.5-4.0 2.0, 2.5, 3.0
DN80 88.9 1.5-5.0 2.0, 2.5, 3.0, 4.0
DN100 101.6 1.5-5.0 2.0, 2.5, 3.0, 4.0
DN125 133.0 2.0-6.0 2.5, 3.0, 4.0, 5.0
DN150 159.0 2.0-6.0 2.5, 3.0, 4.0, 5.0
DN200 219.0 2.5-8.0 3.0, 4.0, 5.0, 6.0
DN250 273.0 3.0-10.0 4.0, 5.0, 6.0, 8.0
DN300 325.0 3.0-12.0 4.0, 5.0, 6.0, 8.0, 10.0

Note: The above are common dimensions. Custom sizes are available upon request. Maximum OD up to 3000mm, maximum wall thickness up to 30mm.

Schedule Wall Thickness Specifications

316 stainless steel welded pipe is available in the following Schedule wall thickness grades:

Schedule Wall Thickness Characteristic Typical Applications
Sch 10S Thin wall Low-pressure fluid handling, weight-sensitive projects
Sch 40S Standard wall (most common) Medium-pressure industrial piping, chemical lines
Sch 80S Thick wall High-pressure service, buried pipelines
Applications

316 stainless steel welded pipe, with its excellent chloride corrosion resistance and good overall properties, is widely used in the following highly corrosive environments:

Industry Typical Applications
Marine & Offshore Seawater piping, ballast systems, offshore platform lines, dock facilities, desalination equipment
Chemical & Petrochemical Chloride-containing media transfer lines, pickling equipment, organic chemical piping, reactor connections
Pharmaceutical & Biotech Purified water systems, WFI (water for injection) piping, clean piping, bioreactors
Food & Beverage Salt-containing food processing lines, soy sauce/vinegar transfer, CIP cleaning systems
Pulp & Paper Bleaching systems, chlorine dioxide lines, digester piping
Energy & Environmental Flue gas desulfurization (FGD) units, nuclear auxiliary systems, wastewater treatment equipment
Semiconductor & Electronics High-purity chemical transfer, ultra-pure water systems, process gas lines
Construction & Decoration Coastal building water supply systems, swimming pool piping, high-end decorative structural components
304 vs 316 Comparison
Key Differences
Comparison 304 Stainless Steel 316 Stainless Steel
Molybdenum (Mo) content None 2.0–3.0%
Chloride pitting resistance Moderate Excellent
Crevice corrosion resistance Moderate Excellent
Seawater corrosion resistance Not recommended Recommended
High-temperature strength Good Better
Cost Lower Higher (approx. +30–40%)
Suitable environments General industry, food, potable water Marine, chemical, pharmaceutical – highly corrosive environments
Grade Selection Recommendations
Environment Recommended Grade Reason
General industry, atmospheric exposure, fresh water 304 Cost-effective, meets basic corrosion requirements
Coastal areas, salt-containing environments 316 Molybdenum provides additional chloride protection
Direct seawater contact (piping, heat exchangers) 316 / 316L Molybdenum-bearing austenitic stainless steel required
Chemical chloride-containing media 316L Low carbon + molybdenum – optimal corrosion resistance
Pharmaceutical, bioengineering 316L High cleanliness, excellent corrosion resistance
Welded applications requiring maximum corrosion resistance 316L Low carbon prevents welding sensitization
Selection Guide
316 vs 316L – How to Choose?
Comparison 316 316L
Carbon content ≤0.08% ≤0.03% (lower)
Intergranular corrosion resistance Moderate Excellent (more stable after welding)
Strength Slightly higher Slightly lower
Recommended applications General corrosive environments, minimal or no welding Piping systems requiring welding, chloride-containing corrosive environments

Recommendation: If your piping system requires significant welding or will be exposed to conditions that risk intergranular corrosion, 316L is the preferred choice.

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