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Girgaon, Mumbai - 400004
Stainless Steel 317L Seamless Pipes
What is Stainless Steel 317L Seamless Pipe?
Stainless Steel 317L Seamless Pipe is manufactured from low-carbon austenitic stainless steel Grade 317L without a longitudinal welded seam. Compared with conventional austenitic stainless steels, SS 317L contains a higher molybdenum content, providing improved resistance to pitting, crevice corrosion and aggressive chemical environments while maintaining excellent weldability and fabrication characteristics.
Kamal Steels supplies Stainless Steel 317L Seamless Pipes and ASTM A312 TP317L Seamless Pipes in various sizes, schedules, wall thicknesses, lengths and surface finishes to meet industrial and project requirements. These pipes are widely used in chemical processing, petrochemical plants, pulp and paper industries, marine applications, pharmaceutical facilities and process piping systems where superior corrosion resistance and long service life are required.
Table of Contents
- SS 317L Seamless Pipe Specifications
- SS 317L Seamless Pipe Size Chart
- SS 317L Seamless Pipe Weight Chart
- SS 317L Seamless Pipe Schedule Chart
- ASTM A312 TP317L Seamless Pipe
- SS 317L Seamless Pipe Chemical Composition & Mechanical Properties
- SS 317L Seamless Pipe vs Welded Pipe
- SS 317L Seamless Pipe Applications & Industries
- Frequently Asked Questions
SS 317L Seamless Pipe Specifications
| Specification | Details |
|---|---|
| Product Name | Stainless Steel 317L Seamless Pipe |
| Grade | SS 317L / Type 317L |
| UNS | S31703 |
| EN Grade | 1.4438 |
| Material Type | Low Carbon Molybdenum-Bearing Austenitic Stainless Steel |
| Manufacturing Process | Seamless |
| Product Standard | ASTM A312 |
| ASME Specification | ASME SA312 |
| Size Range | 1/8" to 24" and above as required |
| Schedule | 5S, 10S, 40S, 80S, 160 and other schedules |
| Wall Thickness | As per applicable schedule or specified requirement |
| Length | Random, Double Random or Fixed Length |
| End Type | Plain End, Bevelled End or Threaded End as required |
| Surface Finish | Pickled & Passivated, Annealed, Bright Annealed or Polished |
| Heat Treatment | Solution Annealed and Rapidly Cooled as specified by the applicable standard |
| Testing | Hydrostatic, PMI, Ultrasonic, Flattening, Flaring and other applicable tests |
| Inspection | Third Party Inspection available as required |
| Certification | EN 10204 3.1 / Material Test Certificate (MTC) |
| Packaging | Bundles, Wooden Cases, Wooden Boxes, Plastic End Caps and Export Packing |
SS 317L Seamless Pipe Size Chart
Stainless Steel 317L Seamless Pipes are manufactured in a wide range of nominal pipe sizes to meet the requirements of chemical processing, petrochemical, marine, pharmaceutical, food processing, and power generation industries. Standard dimensions comply with ASTM A312, ASME SA312, ANSI B36.19M, and ANSI B36.10M specifications.
| NPS / Size | Outside Diameter (OD) | Typical Application |
|---|---|---|
| 1/8" | 10.3 mm | Instrumentation and precision tubing |
| 1/4" | 13.7 mm | Chemical dosing lines |
| 1/2" | 21.3 mm | Utility and process piping |
| 3/4" | 26.7 mm | Industrial fluid transfer |
| 1" | 33.4 mm | Chemical process lines |
| 1 1/4" | 42.2 mm | General industrial applications |
| 1 1/2" | 48.3 mm | Corrosive fluid handling |
| 2" | 60.3 mm | Petrochemical pipelines |
| 3" | 88.9 mm | Process equipment connections |
| 4" | 114.3 mm | Industrial process piping |
| 6" | 168.3 mm | Large process and utility lines |
Standard SS 317L seamless pipes are available in sizes ranging from 1/8" NB to 24" NB, with wall thicknesses manufactured according to the selected schedule and applicable dimensional standards.
SS 317L Seamless Pipe Weight Chart
The theoretical weight of Stainless Steel 317L Seamless Pipes depends on the outside diameter, wall thickness, pipe schedule, and length. These values are useful for estimating transportation, fabrication, and project material requirements.
| NPS / Size | SCH 10 Weight (kg/m) | SCH 40 Weight (kg/m) | SCH 80 Weight (kg/m) |
|---|---|---|---|
| 1/2" | 0.63 | 0.84 | 1.10 |
| 3/4" | 0.80 | 1.12 | 1.48 |
| 1" | 1.01 | 1.40 | 1.81 |
| 1 1/4" | 1.28 | 1.79 | 2.35 |
| 1 1/2" | 1.45 | 2.16 | 2.86 |
| 2" | 1.92 | 2.99 | 3.93 |
| 3" | 3.05 | 4.70 | 6.39 |
| 4" | 4.38 | 6.47 | 8.63 |
| 6" | 7.31 | 10.75 | 14.32 |
The values shown are theoretical weights calculated according to standard dimensions. Actual pipe weights may vary slightly depending on manufacturing tolerances, wall thickness, and applicable ASTM or ASME specifications.
SS 317L Seamless Pipe Schedule Chart
Stainless Steel 317L Seamless Pipes are supplied in multiple schedules to suit varying pressure and temperature requirements across industrial applications. The appropriate schedule should be selected based on design pressure, operating conditions, and applicable piping codes.
| Schedule | Wall Type | Typical Application |
|---|---|---|
| SCH 5S | Light Wall | Low-pressure process systems |
| SCH 10S | Light Wall | Chemical and pharmaceutical piping |
| SCH 40S | Medium Wall | General industrial applications |
| SCH 80S | Heavy Wall | High-pressure process lines |
| SCH 160 | Extra Heavy Wall | Critical pressure services |
| XXS | Double Extra Heavy | Severe operating conditions |
Wall thickness varies according to nominal pipe size and schedule designation. SS 317L seamless pipes are manufactured in accordance with ANSI B36.19M and ANSI B36.10M dimensional standards.
ASTM A312 TP317L Seamless Pipe
ASTM A312 TP317L Seamless Pipe is manufactured from low-carbon austenitic stainless steel designed for high-temperature service and corrosive environments. Grade TP317L contains higher chromium, nickel, and molybdenum than TP316L, providing superior resistance to pitting, crevice corrosion, and chemical attack in chloride-containing media. The low carbon content minimizes carbide precipitation during welding, making it suitable for fabricated piping systems without compromising corrosion resistance.
ASTM A312 TP317L seamless pipes are widely used in chemical processing plants, petrochemical facilities, pulp and paper industries, marine engineering, fertilizer plants, pharmaceutical manufacturing, and power generation. They are available in multiple sizes, schedules, lengths, and end finishes to meet project specifications and international quality standards.
Kamal Steels supplies ASTM A312 TP317L Seamless Pipes manufactured in accordance with ASTM A312, ASME SA312, ANSI B36.19M, and other applicable international standards. Every pipe undergoes rigorous quality inspections, including hydrostatic testing, PMI testing, ultrasonic testing, dimensional inspection, and visual examination to ensure reliable performance in demanding industrial applications.
SS 317L Seamless Pipe Chemical Composition & Mechanical Properties
Stainless Steel 317L is a molybdenum-bearing austenitic stainless steel alloy that offers improved corrosion resistance over conventional 316L stainless steel. Its balanced chemical composition and mechanical strength make it suitable for aggressive chemical processing and high-temperature applications.
Chemical Composition of SS 317L Seamless Pipe
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.035 max |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
| Silicon (Si) | 0.75 max |
| Chromium (Cr) | 18.00 – 20.00 |
| Nickel (Ni) | 11.00 – 15.00 |
| Molybdenum (Mo) | 3.00 – 4.00 |
| Nitrogen (N) | 0.10 max |
| Iron (Fe) | Balance |
Mechanical Properties of SS 317L Seamless Pipe
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa min |
| Yield Strength | 205 MPa min |
| Elongation | 35% min |
| Hardness | 95 HRB max |
The above chemical composition and mechanical properties conform to ASTM A312 TP317L and related material specifications. Material Test Certificates (EN 10204 3.1) are available upon request to verify compliance with project requirements.
SS 317L Seamless Pipe vs Welded Pipe
Stainless Steel 317L seamless and welded pipes are both widely used across industrial sectors; however, their manufacturing methods and performance characteristics differ. Seamless pipes are produced without a longitudinal weld, providing enhanced strength and pressure resistance, whereas welded pipes are manufactured by forming and welding stainless steel strip or plate, offering an economical solution for many applications.
| Feature | Seamless Pipe | Welded Pipe |
|---|---|---|
| Manufacturing Process | Hot extruded without a weld seam | Formed from plate or strip and welded |
| Weld Joint | Not Present | Present |
| Pressure Resistance | Excellent for high-pressure service | Suitable for moderate-pressure applications |
| Corrosion Resistance | Uniform throughout the pipe | Excellent when properly welded and treated |
| Dimensional Accuracy | Very Good | Excellent |
| Cost | Generally Higher | More Economical |
| Typical Applications | Oil & Gas, Petrochemical, Power Plants | Water Lines, Structural & General Industrial Service |
The selection between seamless and welded SS 317L pipes depends on operating pressure, temperature, corrosion conditions, project specifications, and budget. For critical high-pressure or highly corrosive services, seamless pipes are generally preferred, while welded pipes provide a cost-effective solution for standard industrial applications.
SS 317L Seamless Pipe Applications & Industries
Stainless Steel 317L Seamless Pipes are widely used in industries where superior corrosion resistance, high-temperature performance, and excellent mechanical strength are essential. Their higher molybdenum content provides enhanced resistance to pitting and crevice corrosion, making them suitable for demanding chemical and chloride-rich environments. The following applications represent the most common industrial uses of SS 317L seamless piping.
Chemical Processing
Industry: Chemical Processing
Application: Corrosive chemical transfer, reactors, storage tanks and process piping systems.
Petrochemical
Industry: Petrochemical
Application: High-pressure process lines, refineries and hydrocarbon processing facilities.
Oil & Gas
Industry: Oil & Gas
Application: Process piping, offshore platforms, pipelines and production facilities.
Pulp & Paper
Industry: Pulp & Paper
Application: Bleaching plants, digesters, chemical recovery units and liquor pipelines.
Pharmaceutical
Industry: Pharmaceutical
Application: High-purity process piping, sterile fluid transfer and production equipment.
Food Processing
Industry: Food Processing
Application: Hygienic process piping, food-grade fluid transfer and production systems.
Power Generation
Industry: Power Generation
Application: Boiler piping, condensate systems, steam lines and plant utilities.
Water Treatment
Industry: Water Treatment
Application: Desalination plants, water distribution systems and filtration equipment.
Marine
Industry: Marine
Application: Seawater systems, offshore platforms, desalination plants and marine equipment.
Heat Exchangers
Industry: Heat Transfer
Application: Heat exchangers, condensers, cooling systems and thermal process equipment.
Fertilizer Plants
Industry: Fertilizer
Application: Chemical handling systems, ammonia processing and utility piping.
Industrial Fabrication
Industry: Engineering & Fabrication
Application: Custom equipment, pressure vessels, process skids and industrial piping systems.
Frequently Asked Questions
Stainless Steel 317L Seamless Pipes are low-carbon austenitic stainless steel pipes manufactured without welded joints. They offer excellent resistance to corrosion, pitting and chemical attack, making them suitable for demanding industrial applications.
The primary difference is carbon content. SS 317L contains lower carbon than SS 317, which helps reduce carbide precipitation during welding and improves resistance to intergranular corrosion.
The UNS designation for Stainless Steel 317L is UNS S31703, commonly specified for corrosion-resistant piping systems.
ASTM A312 TP317L covers seamless, welded, and heavily cold-worked austenitic stainless steel pipes intended for corrosive and high-temperature service applications.
The low carbon content of SS 317L minimizes carbide precipitation during welding, helping maintain corrosion resistance in welded structures and fabricated equipment.
SS 317L Seamless Pipes are widely used in chemical processing plants, petrochemical industries, fertilizer manufacturing, pulp and paper mills, pharmaceutical facilities and marine applications.
Yes. The higher molybdenum and nickel content of SS 317L provides excellent resistance to pitting, crevice corrosion and chemical attack in aggressive industrial environments.
TP317L Seamless Pipes are available in sizes from 1/8 inch NB to 24 inch NB and in schedules such as SCH 10S, SCH 40S, SCH 80S, SCH 160 and XXS.
Yes. Kamal Steels supplies Stainless Steel 317L Seamless Pipes with Mill Test Certificates (MTC), inspection reports and complete material traceability documentation.
Kamal Steels offers premium-quality ASTM A312 TP317L Seamless Pipes, ready stock availability, competitive pricing, strict quality control and worldwide delivery support for industrial projects.