SS 317 and 317L Welded Tubes Manufacturer
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Midland Alloys Inc. is a reliable manufacturer and supplier of SS 317 and 317L welded tubes, providing plumbing solutions for harsh chemical and high-temperature applications where standard grades often fail. We use modern longitudinal welding lines to make precision tubing from stainless steel coils and plates, ensuring precise dimensional control and weld integrity throughout the process. Our stainless steel 317 welded tube has more molybdenum than 304 or 316, which improves resistance to pitting and crevice corrosion in chloride-rich and acidic environments, where the SS 317L welded tube has less carbon, reducing carbide precipitation during welding and sensitisation risks in fabrication-heavy systems. We offer sizes ranging from 6 mm to 610 mm OD, with wall thicknesses beginning at 1 mm, in annealed, pickled, and polished finishes that meet ASTM, ASME and EN standards. As a reliable SS 317 welded tube supplier, manufacturer and exporter, we maintain ISO-certified production, full traceability, ready stock, and dependable global dispatch. Precision drives our work.
What is SS 317 and 317L Welded Tubes?
SS 317 welded tube and SS 317L welded tube are high-alloy longitudinal pipes formed by rolling stainless steel strips or plates into a cylindrical shape and joining the edges. We use modern TIG (Tungsten Inert Gas) or automatic laser welding techniques to ensure the seam is as strong as the parent metal itself. This manufacturing process results in a stainless steel 317 welded tube with excellent dimensional accuracy and a uniform wall thickness. These grades are essentially enhanced versions of 316 stainless steel, specifically designed to handle more aggressive acidic or chloride-rich process fluids. 317 has a lot of tensile strength, but 317L is better as it is easier to weld and is less prone to being damaged by intergranular forces. Our manufacturing adheres to global specifications such as ASTM A312 and ASME SA312 to ensure safety in high-pressure industrial cycles. These tubes just endure longer in industries that are harsh on them.
Benefits of Welded 317 and 317L SS Tubing
SS 317 and 317L welded tubing offers dependable strength and corrosion control in harsh process conditions. Engineers prefer these grades when chloride exposure, acidic streams, and elevated temperatures combine in the same system. Performance stays stable.
- Excellent resistance to acids and aggressive chemicals
- Higher molybdenum improves pitting resistance in chlorides
- Reduced intergranular corrosion risk with 317L grade
- Suitable for chloride-rich and marine environments
- Good mechanical strength at elevated temperatures
- Reliable service under pressure and heat
- Smooth internal surface supports efficient fluid flow
- Consistent dimensional accuracy in welded construction
Specification of 317 and 317L Welded Tubes
The following specifications define the dimensional range, standards, and supply conditions for our SS 317 and 317L welded tubes manufactured at Midland Alloys Inc.
Seamless Tube OD : 1 / 2" NB - 16" NB
ASTM /ASME SA269/A269
Welded
Round, Square, Rectangular, Hydraulic Etc
Single Random, Double Random, Standard & Cut length
Plain Ends (PE), Threaded Ends (TE), Bevelled Ends (BW), Grooved Mechanical Joints or Grooved Ends, TBE (Treaded Both Ends)
SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Tubes, Finish as per customer Requirements
Contact us today to discuss how Stainless Steel 317/317L Welded Tubes can benefit your application. Whether you need guidance in selecting the right Tubes or have specific requirements, our team of experts is here to help you find the optimal solution.
Technical Details & Delivery Condition
| C | Cr | Mn | Mo | Ni | P | S | Si |
| 0.08% | 24% – 26% | 2.0% | 0.75% | 19% – 22% | 0.045% | 0.03% | 0.75% |
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 317L | 7.9 g/cm3 | 1400 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
Stainless Steel Tubes Grades We Offer
Types of SS 317 and 317L Welded Tubes
We manufacture SS 317 and 317L welded tubes using longitudinal welding methods that ensure strong seam integrity and uniform wall thickness. These tubes offer high corrosion resistance, solid durability, and ease of fabrication during installation. Different shapes and finishes support both industrial piping and structural uses. Choice depends on function.
TUBES Forms
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Round TubePreferred for fluid transfer and process piping lines.
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Square TubeUsed in structural frames and fabrication projects.
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Rectangular TubeSuitable for construction and load-bearing supports.
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Polished TubeApplied in sanitary, decorative, and architectural works.
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Process TubeDesigned for chemical plants and utility piping systems.
Round Bar
Analytic
Cut to Length
Centering
Heating
Perforation
Inspection of Size
Pickling
Inspection of Surface
Lubricating
Cold Drawing (Cold Rolling)
Degreasing
Annealing
Straightening
Cut
Pickling / Passivating
Inspection
Analytic
Marking
Packing & Shipping
Industrial Applications for SS 317 and 317L Welded Tubes
Stainless steel 317 and 317L welded tubes are used in oil and gas units, petrochemical plants, chemical processing facilities and power generation systems where corrosive, chloride-rich or acidic fluids flow through pipelines on a daily basis. Engineers use them for fluid transport lines, heat exchangers, and process pipes because a higher molybdenum content enhances resistance to localised corrosion in harsh environments. In food processing and water treatment plants, these tubes maintain cleanliness and structural stability. Structural supports in coastal or chemical zones also benefit from their durability. 317L, with improved weldability, suits fabrication-heavy installations and retrofit projects. Welded construction keeps costs controlled while delivering dependable corrosion resistance. Practical. Durable. Field-proven.
Why Choose SS 317 and 317L Welded Tubes
Engineers prefer these grades as they meet the gap between common stainless steel and expensive high-nickel alloys. The molybdenum-rich chemical composition protects against pitting and crevice corrosion, which are common problems in chemical processing lines. While 317 has a high strength, the 317L version is preferred for projects that require extensive welding due to its low carbon content, which prevents corrosion resistance loss at joints. Using these tubes ensures reliable, long-term performance when used in environments containing chlorides or hot acids. As an ISO-certified manufacture we provide export-quality shipments. Your infrastructure deserves durable materials.
FAQs
SS 317 contains higher carbon (up to 0.08%), while 317L limits carbon to 0.03%, improving weldability and reducing intergranular corrosion risk.
No. Most applications do not require post-weld heat treatment due to low carbon content, but it depends on the project requirements.
Yes. The higher molybdenum content improves resistance to acidic and chloride-containing media.
SS 317 allows up to 0.08% carbon, while SS 317L restricts carbon to a maximum of 0.03%.
