Stainless Steel 317L Instrumentation Tubes, SS 317 Instrumentation Tubes, 317 Stainless Steel Instrumentation Tube Manufacturer, SS 317 Instrumentation Tube Supplier, SS 317 Instrumentation Tube Exporter, Stainless Steel 317 Precision Tubing, SS 317 Small Diameter Tube ,SS 317 Instrumentation Tubes
Stainless Steel 317L Instrumentation Tubes are premium-grade tubing products designed specifically for high-precision instrumentation and control systems. These tubes are manufactured using 317L stainless steel, a low-carbon, molybdenum-bearing austenitic alloy known for its superior corrosion resistance. Used extensively across demanding industries, 317L instrumentation tubes are ideal for transporting gases or liquids under high pressure and corrosive conditions.
The key advantage of 317L stainless steel lies in its enhanced resistance to chemical attack, particularly in environments containing chlorides, sulfides, and other aggressive agents. With its low carbon content (L-grade), the alloy minimizes the risk of intergranular corrosion after welding, making it suitable for use in corrosive and high-temperature applications. The addition of molybdenum improves its resistance to pitting and crevice corrosion, outperforming conventional grades like 304 and 316L.
317L instrumentation tubes are available in both seamless and welded forms, produced to exacting standards such as ASTM A213, A269, and A632. They are typically supplied in bright annealed or pickled finishes, with tight dimensional tolerances and smooth internal surfaces critical for instrumentation and control line applications. These tubes are commonly manufactured in sizes ranging from 1/8” to 2” OD with varied wall thicknesses to suit different pressure and flow requirements.
Due to their durability and corrosion resistance, Stainless Steel 317L Instrumentation Tubes are widely used in industries such as oil and gas, petrochemical, chemical processing, power generation, pulp and paper, and marine. Typical applications include impulse lines, measurement systems, heat exchangers, pressure gauges, flow monitoring systems, and hydraulic and pneumatic control lines. Their cleanliness and resistance to contamination also make them suitable for pharmaceutical and food processing applications.
Specification of Stainless Steel 317L Instrumentation Tubes
| Property | Specification |
|---|---|
| Material Grade | Stainless Steel 317L |
| UNS Number | S31703 |
| WNR Number | 1.4438 |
| Standards | ASTM A213, ASTM A269, ASTM A632, ASTM A789 |
| Form | Seamless / Welded |
| Outer Diameter (OD) | 1/8" to 2" (3.18 mm to 50.8 mm) |
| Wall Thickness | 0.028" to 0.120" (0.7 mm to 3.0 mm) |
| Length | Up to 6 meters (20 ft) or custom cut lengths |
| Surface Finish | Bright Annealed / Pickled / Polished |
| Tensile Strength (min) | 515 MPa (75 ksi) |
| Yield Strength (0.2% offset) | 205 MPa (30 ksi) |
| Elongation (min) | 35% |
| Hardness (max) | 95 HRB |
| Density | 8.0 g/cm³ |
| Melting Range | 1370–1398°C (2500–2550°F) |
| Corrosion Resistance | Excellent resistance to acids, chlorides, and pitting corrosion |
| Weldability | Excellent (low carbon prevents carbide precipitation) |
| Applications | Instrumentation lines, hydraulic tubing, chemical plants, offshore, oil & gas |
| Certification | EN 10204 3.1 / 3.2 available on request |
Stainless Steel 317L Instrumentation Tubes offer a combination of strength, weldability, and corrosion resistance that ensures long-term performance in challenging environments. Their ability to maintain mechanical integrity and resistance to localized corrosion—especially in chloride-heavy or acidic conditions—makes them a reliable choice for mission-critical systems. Additionally, their smooth internal surface reduces pressure drop and contamination risks, enhancing system performance and safety.
Chemical Composition of Stainless Steel 317L Instrumentation Tubes
| Element | Minimum (%) | Maximum (%) |
|---|---|---|
| Carbon (C) | – | 0.035 |
| Manganese (Mn) | – | 2.00 |
| Phosphorus (P) | – | 0.045 |
| Sulfur (S) | – | 0.030 |
| Silicon (Si) | – | 0.75 |
| Chromium (Cr) | 18.0 | 20.0 |
| Nickel (Ni) | 11.0 | 15.0 |
| Molybdenum (Mo) | 3.0 | 4.0 |
| Nitrogen (N) | – | 0.10 |
| Iron (Fe) | Balance | Balance |
With a proven track record as a Stainless Steel 317L Instrumentation Tubes exporter in over 30 countries, Sumer Metal Industries ensures global availability, third-party inspection support, and client-specific customization. Our wide export network combined with strict quality standards has made us a preferred choice for SS 317 tubing worldwide.
Specification of Stainless Steel 317L Instrumentation Tubes
| Property | Specification |
|---|---|
| Material Grade | Stainless Steel 317L |
| UNS Number | S31703 |
| WNR Number | 1.4438 |
| Standards | ASTM A213, ASTM A269, ASTM A632, ASTM A789 |
| Form | Seamless / Welded |
| Outer Diameter (OD) | 1/8" to 2" (3.18 mm to 50.8 mm) |
| Wall Thickness | 0.028" to 0.120" (0.7 mm to 3.0 mm) |
| Length | Up to 6 meters (20 ft) or custom cut lengths |
| Surface Finish | Bright Annealed / Pickled / Polished |
| Tensile Strength (min) | 515 MPa (75 ksi) |
| Yield Strength (0.2% offset) | 205 MPa (30 ksi) |
| Elongation (min) | 35% |
| Hardness (max) | 95 HRB |
| Density | 8.0 g/cm³ |
| Melting Range | 1370–1398°C (2500–2550°F) |
| Corrosion Resistance | Excellent resistance to acids, chlorides, and pitting corrosion |
| Weldability | Excellent (low carbon prevents carbide precipitation) |
| Applications | Instrumentation lines, hydraulic tubing, chemical plants, offshore, oil & gas |
| Certification | EN 10204 3.1 / 3.2 available on request |
🏭 Industry & Application
- ✅ SS 317 Instrumentation Tubes for Medical Industry
- ✅ SS 317 Instrumentation Tubes for Chemical Processing
- ✅ SS 317 Tubes for Instrumentation Lines
- ✅ Stainless Steel 317L Instrumentation Tubes for Gas & Liquid Flow
- ✅ SS 317 Tubes for Heat Exchangers
❓ Frequently Asked Questions (FAQs)
Q1: What is Stainless Steel 317L?
Stainless Steel 317L is a low-carbon, austenitic stainless steel alloy containing higher levels of chromium, nickel, and molybdenum compared to 316L. It offers superior corrosion resistance, especially in aggressive and chloride-rich environments.
Q2: What are instrumentation tubes used for?
Instrumentation tubes are used in precision control and measurement systems for fluids and gases. Applications include pressure monitoring, flow measurement, and hydraulic or pneumatic control systems in industries like oil & gas, chemical processing, and pharmaceuticals.
Q3: Why choose 317L over 316L for instrumentation tubing?
317L provides better resistance to pitting and crevice corrosion, especially in acidic or chloride-heavy environments. It’s preferred for more aggressive conditions where 316L may not perform reliably over time.
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At Sumer Metal Industries Pvt. Ltd., we follow a zero-defect policy by implementing stringent quality checks, using certified raw materials, and continuously improving our processes to deliver reliable and consistent tubing solutions
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