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Girgaon, Mumbai - 400004
Stainless Steel 317L Welded Pipes Manufacturer in India
What are Stainless Steel 317L Welded Pipe?
Stainless Steel 317L Welded Pipe is a low-carbon austenitic stainless steel pipe manufactured by forming stainless steel strip or plate into a tubular shape and joining the seam through welding. The grade contains chromium, nickel and molybdenum, with the higher molybdenum content providing enhanced resistance to pitting and crevice corrosion in aggressive service environments.
The "L" designation indicates the low-carbon version of Stainless Steel 317. Its reduced carbon content helps minimize chromium carbide precipitation during welding and supports improved resistance to intergranular corrosion in welded construction. This makes 317L suitable for fabricated piping systems where welding is an important part of installation.
Kamal Steels is a Stainless Steel 317L Welded Pipe Manufacturer and Stockist in India, based in Mumbai. The company supplies SS 317L welded pipes in different sizes, schedules, wall thicknesses, lengths and surface finishes for industrial and international requirements.
Table of Contents
- Stainless Steel 317L Welded Pipe Specifications
- Stainless Steel 317L Welded Pipe Chemical Composition
- Stainless Steel 317L Welded Pipe Sizes, Dimensions & Wall Thickness
- ASTM A312 TP317L Welded Pipe Dimensions & Tolerances
- Stainless Steel 317L Welded Pipe Pressure Rating
- Stainless Steel 317L Welded Pipe Equivalent Grades
- Stainless Steel 317L Welded Pipe Surface Finish
- Stainless Steel 317L Welded Pipe Applications
- Industries Using Stainless Steel 317L Welded Pipe
- Stainless Steel 317L Welded Pipe FAQs
Stainless Steel 317L Welded Pipe Specifications
Stainless Steel 317L Welded Pipe is a low-carbon, molybdenum-bearing austenitic stainless steel pipe designed for demanding corrosive service. The grade contains higher chromium, nickel and molybdenum than conventional 304 stainless steel, providing improved resistance to general corrosion, pitting and crevice corrosion. Its low carbon content also supports resistance to sensitization during welding.
ASTM A312 TP317L is commonly specified for austenitic stainless steel pipe used in corrosive and high-temperature service. Stainless Steel 317L Welded Pipes are suitable for chemical processing, petrochemical, pulp and paper, pollution-control and other industrial systems where corrosion resistance and reliable welded construction are required.
| Specification | Details |
|---|---|
| Product | Stainless Steel 317L Welded Pipe |
| Grade | 317L |
| UNS Number | S31703 |
| ASTM Specification | ASTM A312 |
| ASME Specification | ASME SA312 |
| Material Type | Low-Carbon Austenitic Stainless Steel |
| Pipe Type | Welded |
| Nominal Size | 1/8 NB to 48 NB and as required |
| Schedules | SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160, XXS and others |
| Length | Single Random, Double Random and Cut Length |
| End Preparation | Plain End, Bevelled End, Threaded End and as required |
| Surface Finish | Annealed & Pickled, Mill Finish, Bright Annealed and Polished |
| Testing | Hydrostatic, Ultrasonic, PMI, Dimensional Inspection and other specified tests |
| Material Certificate | EN 10204 3.1 Certificate available as required |
Kamal Steels supplies Stainless Steel 317L Welded Pipes from India in different sizes, schedules, wall thicknesses, lengths and finishes. Pipes can be supplied with inspection, testing and material documentation according to applicable standards and customer requirements.
Stainless Steel 317L Welded Pipe Chemical Composition
The chemical composition of Stainless Steel 317L includes chromium, nickel and molybdenum, which provide its corrosion-resistant properties. The controlled low carbon content is a key characteristic of the 317L grade and helps improve resistance to sensitization after welding.
| Element | Composition (%) |
|---|---|
| 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) | 18.0–20.0 |
| Nickel (Ni) | 11.0–15.0 |
| Molybdenum (Mo) | 3.0–4.0 |
| Nitrogen (N) | 0.10 max. |
| Iron (Fe) | Balance |
The final heat analysis should be verified against the applicable ASTM specification and the material test certificate supplied with the pipe.
Stainless Steel 317L Welded Pipe Sizes, Dimensions & Wall Thickness
Stainless Steel 317L Welded Pipes are available in a range of nominal pipe sizes, outside diameters and wall thicknesses. The required dimensions depend on design pressure, operating temperature, flow requirements, fabrication conditions and applicable piping standards.
Common schedules include SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160 and XXS, depending on nominal pipe size. Custom outside diameters, wall thicknesses and lengths can also be supplied for project-specific requirements.
| Nominal Pipe Size | Outside Diameter | Common Schedules |
|---|---|---|
| 1/8 NB | 10.3 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 1/4 NB | 13.7 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 1/2 NB | 21.3 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 1 NB | 33.4 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 1 1/2 NB | 48.3 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 2 NB | 60.3 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 3 NB | 88.9 mm | SCH 5S, SCH 40S, SCH 80S |
| 4 NB | 114.3 mm | SCH 5S, SCH 40S, SCH 80S |
| 6 NB | 168.3 mm | SCH 5S, SCH 40S, SCH 80S, SCH 160 |
| 8 NB | 219.1 mm | SCH 10S, SCH 40S, SCH 80S, SCH 160 |
| 10 NB | 273.1 mm | SCH 10S, SCH 40S, SCH 80S, SCH 160 |
| 12 NB | 323.9 mm | SCH 10S, SCH 40S, SCH 80S, SCH 160 |
| 14 NB | 355.6 mm | SCH 10S, SCH 40S, SCH 80S |
| 16 NB | 406.4 mm | SCH 10S, SCH 40, SCH 80 |
| 18 NB | 457.2 mm | SCH 10S, SCH 40, SCH 80 |
| 20 NB | 508.0 mm | SCH 10S, SCH 40, SCH 80 |
| 24 NB | 610.0 mm | SCH 10S, SCH 40, SCH 80 |
Kamal Steels supplies Stainless Steel 317L Welded Pipes in standard and custom sizes, schedules, wall thicknesses and lengths according to applicable standards and project specifications.
Stainless Steel 317L Welded Pipe Sizes, Dimensions & Wall Thickness
Stainless Steel 317L Welded Pipes are available in a range of nominal pipe sizes, outside diameters and wall thicknesses. The required dimensions depend on design pressure, operating temperature, flow requirements, fabrication conditions and applicable piping standards.
Common schedules include SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160 and XXS, depending on nominal pipe size. Custom outside diameters, wall thicknesses and lengths can also be supplied for project-specific requirements.
| Nominal Pipe Size | Outside Diameter | Common Schedules |
|---|---|---|
| 1/8 NB | 10.3 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 1/4 NB | 13.7 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 1/2 NB | 21.3 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 1 NB | 33.4 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 1 1/2 NB | 48.3 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 2 NB | 60.3 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 3 NB | 88.9 mm | SCH 5S, SCH 40S, SCH 80S |
| 4 NB | 114.3 mm | SCH 5S, SCH 40S, SCH 80S |
| 6 NB | 168.3 mm | SCH 5S, SCH 40S, SCH 80S, SCH 160 |
| 8 NB | 219.1 mm | SCH 10S, SCH 40S, SCH 80S, SCH 160 |
| 10 NB | 273.1 mm | SCH 10S, SCH 40S, SCH 80S, SCH 160 |
| 12 NB | 323.9 mm | SCH 10S, SCH 40S, SCH 80S, SCH 160 |
| 14 NB | 355.6 mm | SCH 10S, SCH 40S, SCH 80S |
| 16 NB | 406.4 mm | SCH 10S, SCH 40, SCH 80 |
| 18 NB | 457.2 mm | SCH 10S, SCH 40, SCH 80 |
| 20 NB | 508.0 mm | SCH 10S, SCH 40, SCH 80 |
| 24 NB | 610.0 mm | SCH 10S, SCH 40, SCH 80 |
Kamal Steels supplies Stainless Steel 317L Welded Pipes in standard and custom sizes, schedules, wall thicknesses and lengths according to applicable standards and project specifications.
ASTM A312 TP317L Welded Pipe Dimensions & Tolerances
ASTM A312 TP317L Welded Pipes are manufactured with controlled dimensional requirements for outside diameter, wall thickness and length. Maintaining dimensional accuracy is important for pipe fit-up, welding, fabrication and installation in process piping systems.
| Parameter | Requirement |
|---|---|
| Outside Diameter | Controlled according to applicable ASTM A312 dimensional requirements and specified pipe size. |
| Wall Thickness | Controlled according to specified nominal wall thickness and applicable standard requirements. |
| Length | Available in standard random, double random or specified cut lengths. |
| Ovality | Controlled to maintain acceptable roundness and dimensional consistency. |
| End Preparation | Plain, bevelled or other specified end preparation. |
Dimensional inspection may include outside diameter, wall thickness and length measurements. Additional inspection requirements can be arranged according to customer specifications and project requirements.
Stainless Steel 317L Welded Pipe Pressure Rating
The pressure rating of Stainless Steel 317L Welded Pipe depends on nominal size, wall thickness, operating temperature, allowable material stress and the applicable piping design code. A single pressure value cannot be applied to all pipe sizes and schedules.
| Factor | Effect on Pressure Design |
|---|---|
| Pipe Size | Outside diameter is considered in pressure design calculations. |
| Wall Thickness | Greater wall thickness generally increases pressure-carrying capacity. |
| Pipe Schedule | Higher schedules generally provide greater nominal wall thickness. |
| Operating Temperature | Allowable material stress changes with service temperature. |
| Design Code | The applicable piping code determines the pressure design calculation. |
| Corrosion Allowance | Additional wall thickness may be required for corrosive service. |
The final allowable working pressure should be established from the actual design pressure, temperature, pipe dimensions, material properties and applicable engineering code.
Stainless Steel 317L Welded Pipe Pressure Rating
The pressure rating of Stainless Steel 317L Welded Pipe depends on nominal size, wall thickness, operating temperature, allowable material stress and the applicable piping design code. A single pressure value cannot be applied to all pipe sizes and schedules.
| Factor | Effect on Pressure Design |
|---|---|
| Pipe Size | Outside diameter is considered in pressure design calculations. |
| Wall Thickness | Greater wall thickness generally increases pressure-carrying capacity. |
| Pipe Schedule | Higher schedules generally provide greater nominal wall thickness. |
| Operating Temperature | Allowable material stress changes with service temperature. |
| Design Code | The applicable piping code determines the pressure design calculation. |
| Corrosion Allowance | Additional wall thickness may be required for corrosive service. |
The final allowable working pressure should be established from the actual design pressure, temperature, pipe dimensions, material properties and applicable engineering code.
Stainless Steel 317L Welded Pipe Equivalent Grades
Stainless Steel 317L is identified by different designations under international standards. These designations are useful when specifying and sourcing the low-carbon 317L grade for industrial piping applications.
| Standard | 317L Designation |
|---|---|
| ASTM | 317L |
| ASME | SA312 TP317L |
| UNS | S31703 |
| EN | 1.4438 |
Equivalent grades should be verified against chemical composition, mechanical properties, product form, manufacturing requirements and the applicable project specification before material substitution.
Stainless Steel 317L Welded Pipe Surface Finish
Stainless Steel 317L Welded Pipes can be supplied with different surface finishes depending on the application, cleaning requirements, corrosion environment and fabrication process.
| Surface Finish | Description | Typical Application |
|---|---|---|
| Annealed & Pickled | Heat-treated and chemically cleaned surface. | Chemical and process piping |
| Mill Finish | Standard surface produced during manufacturing. | General industrial applications |
| Bright Annealed | Smooth and bright surface produced through controlled annealing. | Specialized process systems |
| Polished | Mechanically finished surface with improved smoothness. | Specialized industrial applications |
The required surface finish should be selected according to service conditions and the applicable project specification.
Stainless Steel 317L Welded Pipe Applications
Stainless Steel 317L Welded Pipes are used in corrosive process and fluid handling systems where enhanced corrosion resistance and low-carbon welded construction are required.
- Chemical process piping
- Petrochemical piping
- Acid handling systems
- Pulp and paper processing
- Flue gas handling systems
- Pollution control equipment
- Heat exchanger systems
- Corrosive fluid handling systems
Industries Using Stainless Steel 317L Welded Pipe
Stainless Steel 317L Welded Pipes are used across industries where corrosion-resistant piping is required for aggressive chemicals, process fluids and demanding industrial environments.
| Industry | Typical Use |
|---|---|
| Chemical Processing | Corrosive chemical and process piping |
| Petrochemical | Process and fluid handling systems |
| Oil & Gas | Corrosion-resistant process piping |
| Pulp & Paper | Bleaching and corrosive process systems |
| Power Generation | Industrial process and utility piping |
| Refineries | Corrosive fluid and process systems |
| Pollution Control | Flue gas and corrosive gas handling |
Kamal Steels supplies Stainless Steel 317L Welded Pipes from India for domestic and international requirements, with options for different sizes, schedules, wall thicknesses, lengths, finishes, testing and material documentation.
Frequently Asked Questions
Stainless Steel 317L Welded Pipe is a low-carbon austenitic stainless steel pipe with increased molybdenum content, offering superior resistance to pitting, crevice corrosion, and chemical attack. It is widely used in highly corrosive process environments.
The primary difference is the carbon content. SS 317L contains lower carbon than SS 317, reducing carbide precipitation during welding and providing better resistance to intergranular corrosion in welded applications.
Our Stainless Steel 317L Welded Pipes are manufactured in accordance with ASTM A312, ASME SA312, ASTM A358, ASTM A778, ASME B36.19M, and other applicable international standards.
We supply SS 317L Welded Pipes from 1/8" NB to 24" NB in various wall thicknesses, schedules, and custom lengths to meet different industrial requirements.
These pipes provide excellent corrosion resistance, outstanding weldability, improved resistance to chloride environments, high mechanical strength, long service life, and reliable performance in aggressive process conditions.
They are extensively used in chemical processing plants, petrochemical industries, marine applications, pharmaceutical manufacturing, pulp & paper mills, food processing, water treatment plants, and heat exchanger systems.
Every pipe undergoes Hydrostatic Testing, Positive Material Identification (PMI), Radiographic Testing, Flattening Test, Visual Inspection, Dimensional Inspection, and other quality checks before dispatch.
Yes. Kamal Steels supplies Stainless Steel 317L Welded Pipes with EN 10204 3.1 Mill Test Certificates. Third-party inspection certificates can also be provided upon customer request.
Yes. Kamal Steels manufactures and supplies customized welded pipes in various diameters, wall thicknesses, lengths, end preparations, and surface finishes according to project specifications.
Kamal Steels is a trusted manufacturer, supplier, stockist, and exporter of Stainless Steel 317L Welded Pipes, offering certified quality materials, advanced manufacturing, competitive pricing, prompt delivery, complete inspection documentation, and dependable customer support for projects across India and worldwide.