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Girgaon, Mumbai - 400004
Stainless Steel 316 Welded Pipes
What is Stainless Steel 316 Welded Pipe?
Stainless Steel 316 Welded Pipe is an austenitic stainless steel pipe manufactured by forming stainless steel strip or plate into a tubular shape and joining the longitudinal seam by welding. Its chromium, nickel and molybdenum composition provides good resistance to corrosion, particularly in environments containing chlorides and aggressive chemicals.
Grade 316 is widely selected when better corrosion resistance than 304 stainless steel is required. Molybdenum improves resistance to pitting and crevice corrosion, making the grade suitable for marine, chemical, petrochemical, pharmaceutical and water-treatment applications.
Kamal Steels is a Stainless Steel 316 Welded Pipe Manufacturer and Exporter in India, based in Mumbai. The company supplies 316 welded pipes in different sizes, schedules, wall thicknesses, lengths and finishes for domestic and international industrial requirements.
The commonly specified pressure-piping designation is ASTM A312 TP316 / ASME SA312 TP316, with UNS designation S31600. Pipes can be supplied with testing, inspection and material certification according to applicable project requirements.
Table of Contents
- Stainless Steel 316 Welded Pipe Specifications
- Stainless Steel 316 Welded Pipe Chemical Composition
- Stainless Steel 316 Welded Pipe Sizes, Dimensions & Wall Thickness
- ASTM A312 TP316 Welded Pipe Dimensions & Tolerances
- Stainless Steel 316 Welded Pipe Pressure Rating
- Stainless Steel 316 Welded Pipe Equivalent Grades
- Stainless Steel 316 Welded Pipe Surface Finish
- Stainless Steel 316 Welded Pipe Applications
- Industries Using Stainless Steel 316 Welded Pipe
- Stainless Steel 316 Welded Pipe FAQs
Stainless Steel 316 Welded Pipe Specifications
Stainless Steel 316 Welded Pipe is an austenitic stainless steel pipe containing chromium, nickel and molybdenum. The addition of molybdenum provides improved resistance to pitting, crevice corrosion and chloride exposure compared with 304 stainless steel. This makes Grade 316 suitable for chemical processing, marine, pharmaceutical, food processing and other corrosive service applications.
ASTM A312 TP316 is commonly specified for Stainless Steel 316 Pipe used in pressure, process and elevated-temperature applications. The material combines good corrosion resistance, strength, weldability and durability, while the welded construction allows economical production of larger diameters and customized pipe dimensions.
| Specification | Details |
|---|---|
| Product | Stainless Steel 316 Welded Pipe |
| Grade | 316 |
| UNS Number | S31600 |
| ASTM Specification | ASTM A312 |
| ASME Specification | ASME SA312 |
| Material Type | 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 316 Welded Pipes in standard and custom sizes, schedules, wall thicknesses and lengths. Pipes can be supplied with applicable inspection, testing and material documentation according to customer and project requirements.
Stainless Steel 316 Welded Pipe Chemical Composition
The chemical composition of Stainless Steel 316 provides its combination of corrosion resistance, strength and weldability. Chromium and nickel support the austenitic stainless steel structure, while molybdenum improves resistance to pitting and crevice corrosion in chloride-containing environments.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.080 max. |
| Manganese (Mn) | 2.00 max. |
| Silicon (Si) | 0.75 max. |
| Phosphorus (P) | 0.045 max. |
| Sulfur (S) | 0.030 max. |
| Chromium (Cr) | 16.0–18.0 |
| Nickel (Ni) | 10.0–14.0 |
| Molybdenum (Mo) | 2.0–3.0 |
| Nitrogen (N) | 0.10 max. |
| Iron (Fe) | Balance |
The actual heat analysis should be verified against the applicable ASTM specification and the material test certificate supplied with the pipe.
Stainless Steel 316 Welded Pipe Sizes, Dimensions & Wall Thickness
Stainless Steel 316 Welded Pipes are available in different nominal pipe sizes, outside diameters and wall thicknesses. Pipe dimensions are selected according to operating pressure, temperature, piping design, fabrication requirements and applicable project specifications.
Common schedules include SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160 and XXS, subject to pipe size and availability. Custom outside diameters, wall thicknesses and lengths can also be supplied for specific industrial 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 10S, SCH 40S, SCH 80S |
| 4 NB | 114.3 mm | SCH 5S, SCH 10S, 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 316 Welded Pipes in standard and custom sizes, schedules, wall thicknesses and lengths according to applicable standards and project requirements.
ASTM A312 TP316 Welded Pipe Dimensions & Tolerances
ASTM A312 TP316 Welded Pipes are manufactured with controlled dimensional requirements for outside diameter, wall thickness and length. Dimensional accuracy is important for pipe fit-up, welding, fabrication and installation.
| 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 can include outside diameter, wall thickness, length and other applicable measurements. Additional inspection requirements can be specified for critical process and pressure-piping applications.
Stainless Steel 316 Welded Pipe Pressure Rating
The pressure rating of Stainless Steel 316 Welded Pipe depends on pipe size, wall thickness, operating temperature, allowable stress and the applicable piping design code. A thicker wall generally provides greater pressure capacity, but the final pressure rating must be determined from the actual design conditions.
| Factor | Effect on Pressure Design |
|---|---|
| Pipe Size | Outside diameter is considered in pressure design calculations. |
| Wall Thickness | Wall thickness directly affects pressure-carrying capacity. |
| Pipe Schedule | Different schedules provide different nominal wall thicknesses. |
| Operating Temperature | Allowable material stress varies with temperature. |
| Design Code | The applicable piping code determines the pressure design calculation. |
| Corrosion Allowance | Additional wall thickness may be required where applicable. |
The final allowable working pressure should be established using the actual design pressure, temperature, pipe dimensions, material properties and applicable engineering code rather than using a generic pressure value.
Stainless Steel 316 Welded Pipe Equivalent Grades
Stainless Steel 316 is identified by different designations under international material standards. These designations help manufacturers, engineers and procurement teams identify the material for international projects and specifications.
| Standard | 316 Designation |
|---|---|
| ASTM | 316 |
| ASME | SA312 TP316 |
| UNS | S31600 |
| EN | 1.4401 |
| JIS | SUS 316 |
Equivalent designations should be verified against the required chemical composition, mechanical properties, product specification, manufacturing method and project requirements before accepting material substitution.
Stainless Steel 316 Welded Pipe Surface Finish
The surface finish of Stainless Steel 316 Welded Pipe is selected according to the application, fabrication process and required surface condition. Industrial piping commonly uses standard mill or annealed and pickled finishes, while specialized applications may require brighter or polished surfaces.
| Surface Finish | Description | Typical Application |
|---|---|---|
| Annealed & Pickled | Heat-treated and chemically cleaned surface. | Chemical and process piping |
| Mill Finish | Standard surface obtained during manufacturing. | General industrial applications |
| Bright Annealed | Bright and smooth surface produced by controlled annealing. | Specialized process applications |
| Polished | Mechanically finished surface with improved smoothness. | Pharmaceutical and specialized applications |
The required surface finish should be selected according to corrosion conditions, cleaning requirements, fabrication requirements and the final application.
Stainless Steel 316 Welded Pipe Applications
Stainless Steel 316 Welded Pipes are used where improved corrosion resistance, chloride resistance, weldability and long-term service performance are required.
- Chemical processing and fluid transfer systems
- Marine and offshore piping
- Pharmaceutical process piping
- Food and beverage processing
- Water treatment and desalination systems
- Oil and gas process piping
- Petrochemical processing equipment
- Heat exchanger and utility systems
The suitability of Stainless Steel 316 should be evaluated according to the actual chemical environment, chloride concentration, operating temperature, pressure and applicable design requirements.
Industries Using Stainless Steel 316 Welded Pipe
Stainless Steel 316 Welded Pipes are used across industries where corrosion resistance, strength and reliable welded fabrication are important.
| Industry | Typical Use |
|---|---|
| Chemical Industry | Corrosive process piping and chemical transfer systems |
| Pharmaceutical Industry | Process and utility piping systems |
| Food & Beverage | Fluid handling and hygienic process lines |
| Oil & Gas | Process and utility piping systems |
| Marine & Offshore | Marine and chloride-containing service environments |
| Power Generation | Selected process and utility piping applications |
| Water Treatment | Water, wastewater and desalination systems |
| Petrochemical | Corrosive process and utility piping |
Kamal Steels supplies Stainless Steel 316 Welded Pipes from India for domestic and international industrial requirements. Pipes are available with different sizes, schedules, wall thicknesses, lengths, finishes, testing options and material documentation according to project requirements.
Frequently Asked Questions
Stainless Steel 316 Welded Pipe is an austenitic stainless steel pipe containing molybdenum, which provides superior corrosion resistance, especially in chloride-rich and marine environments.
SS 316 contains 2–3% molybdenum, giving it better resistance to pitting, crevice corrosion, and chemical attack than SS 304, making it ideal for harsh environments.
Our Stainless Steel 316 Welded Pipes are manufactured according to ASTM A312, ASTM A358, ASTM A778, ASME SA312, and ASME B36.19M standards.
SS 316 Welded Pipes are available from 1/8" NB to 24" NB in multiple schedules, wall thicknesses, and custom lengths to meet project requirements.
They are widely used in marine applications, chemical processing plants, pharmaceuticals, food processing, petrochemical plants, water treatment systems, and offshore industries.
Yes. Due to their molybdenum content, SS 316 Welded Pipes offer excellent resistance to seawater, chlorides, and other corrosive environments.
Every pipe undergoes Hydrostatic Testing, PMI, Radiographic Testing, Flattening Test, Visual Inspection, and Dimensional Inspection before dispatch.
Yes. All pipes are supplied with EN 10204 3.1 Mill Test Certificates, and third-party inspection certificates are available on request.
Yes. We offer customized diameters, wall thicknesses, schedules, lengths, end preparations, and surface finishes as per customer specifications.
Kamal Steels offers premium-quality SS 316 Welded Pipes with certified materials, competitive pricing, ready stock, fast delivery, strict quality control, and reliable export services worldwide.