Stainless Steel 304L Seamless Pipes Manufacturer in India

What are Stainless Steel 304L Seamless Pipes?

Stainless Steel 304L Seamless Pipes are low-carbon austenitic stainless steel pipes manufactured without a longitudinal welding seam. The low carbon content of SS 304L helps reduce the risk of carbide precipitation during welding, making the grade suitable for fabricated components and piping systems where welding is involved. These pipes offer good corrosion resistance, strength, toughness, and formability for a wide range of industrial applications.

Stainless Steel 304L Seamless Pipes are available in various outside diameters, wall thicknesses, schedules, and lengths to meet different pressure, temperature, and fluid-handling requirements. Their seamless construction makes them suitable for applications where reliable pipe integrity and consistent performance are important.

SS 304L Seamless Pipes are commonly used in chemical processing, food processing, pharmaceutical, petrochemical, oil and gas, water treatment, process equipment, and general engineering applications. Their combination of low carbon content, corrosion resistance, and good weldability makes them a practical choice for many industrial piping systems.

Kamal Steels is a leading Stainless Steel 304L Seamless Pipes Manufacturer & Stockist in India, supplying SS 304L Seamless Pipes in standard and customized sizes, schedules, wall thicknesses, and lengths. Products can be supplied with required testing, inspection, material certificates, and documentation according to customer and project specifications.

Stainless Steel 304L Seamless Pipe Specifications

Table of Contents

Stainless Steel 304L Seamless Pipe Specifications

Specification Details
Product Name Stainless Steel 304L Seamless Pipe
Grade SS 304L / Type 304L
UNS S30403
EN Grade 1.4307
Material Type Low-Carbon 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 As specified by the applicable standard
Testing Hydrostatic, PMI, Ultrasonic 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 and Export Packing

SS 304L seamless pipe dimensions, tolerances, mechanical properties, chemical composition and testing requirements are subject to the applicable product standard and specified grade requirements.

Stainless Steel 304L Seamless Pipe Size Chart

SS 304L Seamless Pipes are available in a wide range of nominal pipe sizes and outside diameters. The required wall thickness is selected according to the pipe schedule, pressure requirements, applicable standard and project specifications.

NPS / Size Outside Diameter (OD) Common Use
1/8" 10.3 mm Instrumentation and small-bore lines
1/4" 13.7 mm Small-bore piping
1/2" 21.3 mm Utility and process piping
3/4" 26.7 mm Industrial piping
1" 33.4 mm Process lines
1 1/4" 42.2 mm General piping
1 1/2" 48.3 mm Industrial service
2" 60.3 mm Fluid transfer
3" 88.9 mm Process and fabrication
4" 114.3 mm Utility and industrial piping
6" 168.3 mm Large process lines
8" 219.1 mm Large process and utility lines
10" 273.0 mm Industrial process piping
12" 323.9 mm Large-volume fluid transfer

SS 304L pipe dimensions and tolerances may vary according to the nominal pipe size, schedule and applicable dimensional standard. Larger sizes and customized dimensions can be supplied according to project requirements.

Stainless Steel 304L Seamless Pipe Weight Chart

The weight of SS 304L seamless pipe depends on its outside diameter, wall thickness, pipe schedule and length. For the same nominal pipe size, a heavier wall thickness generally results in a higher weight per meter.

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 approximate theoretical weights for reference. Actual supplied weight may vary depending on dimensional tolerances, wall thickness, material density and manufacturing conditions.

For an accurate SS 304L seamless pipe weight calculation, the nominal pipe size, outside diameter, wall thickness, schedule and required length should be considered.

Stainless Steel 304L Seamless Pipe Schedule Chart

The schedule of a Stainless Steel 304L Seamless Pipe indicates the pipe wall thickness in relation to its nominal pipe size. Different schedules are selected according to pressure, temperature, service conditions and applicable piping requirements.

Schedule Wall Type Typical Use
SCH 5S Light Wall Light-duty and low-pressure applications
SCH 10S Light Wall General process and industrial piping
SCH 40S Medium Wall General industrial and process piping
SCH 80S Heavy Wall Higher-pressure and demanding service
SCH 160 Extra Heavy Wall High-pressure and critical applications
SCH XXS Extra Heavy Wall Severe pressure and heavy-duty applications

SS 304L seamless pipe wall thickness varies according to nominal pipe size and the applicable dimensional standard. Schedule selection should be based on design pressure, operating temperature, fluid service and project specifications.

Kamal Steels can supply Stainless Steel 304L Seamless Pipes in different schedules, wall thicknesses and dimensions according to the required application and applicable standards.

ASTM A312 TP304L Seamless Pipe

ASTM A312 TP304L Seamless Pipe is an austenitic stainless steel pipe manufactured from low-carbon Type 304L stainless steel. TP304L is commonly identified by UNS S30403 and is designed to provide good corrosion resistance, strength and fabrication characteristics for industrial piping applications.

The lower carbon content of SS 304L helps reduce the risk of chromium-carbide precipitation during welding and makes the grade suitable for applications involving welding and fabrication. It is commonly selected for process piping, chemical equipment, food processing systems, pharmaceutical facilities, petrochemical plants and general industrial services.

ASTM A312 TP304L Seamless Pipes are available in different nominal sizes, schedules, wall thicknesses, lengths, end configurations and surface finishes according to project requirements and the applicable specification.

Specification Details
Grade SS 304L / Type 304L
UNS S30403
Material Type Austenitic Stainless Steel
Product Type Seamless Pipe
ASTM Standard ASTM A312
ASME Specification ASME SA312
Size Range 1/8" to 24" and above as required
Schedules 5S, 10S, 40S, 80S, 160 and other schedules
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

ASTM A312 TP304L material requirements, dimensions, mechanical properties and testing requirements should be verified against the applicable specification and the Material Test Certificate (MTC) supplied with the pipe.

SS 304L vs SS 304 Seamless Pipe

SS 304L Seamless Pipes and SS 304 Seamless Pipes are austenitic stainless steel pipes with similar chromium and nickel compositions and good general corrosion resistance. The primary difference is their carbon content. SS 304L has a lower carbon content, which makes it particularly suitable for applications involving welding and fabrication. SS 304 generally offers slightly higher strength compared with 304L.

Property SS 304L Seamless Pipe SS 304 Seamless Pipe
UNS Designation S30403 S30400
Carbon Content 0.030% max. 0.080% max.
Corrosion Resistance Excellent for general applications Excellent for general applications
Weldability Excellent Good
Post-Welding Sensitization Lower risk Higher risk under certain conditions
Typical Selection Welded and fabricated systems General-purpose stainless steel piping

SS 304L is generally preferred when extensive welding is involved, while SS 304 is widely selected for general-purpose applications requiring good corrosion resistance and mechanical performance.

SS 304L vs SS 316L Seamless Pipe

SS 304L Seamless Pipes and SS 316L Seamless Pipes are low-carbon austenitic stainless steel grades used in industrial piping. The main difference is that SS 316L contains molybdenum, which provides improved resistance to chloride-related corrosion and certain aggressive chemical environments. SS 304L is commonly selected for general corrosion resistance, while SS 316L is preferred for more demanding corrosive service.

Property SS 304L Seamless Pipe SS 316L Seamless Pipe
UNS Designation S30403 S31603
Chromium Approximately 18 - 20% Approximately 16 - 18%
Nickel Approximately 8 - 12% Approximately 10 - 14%
Molybdenum Not intentionally added Approximately 2 - 3%
General Corrosion Resistance Excellent Excellent
Chloride Resistance Good Better
Typical Applications Food, chemical, pharmaceutical and general process piping Marine, chemical, pharmaceutical and chloride-containing environments

SS 304L is a cost-effective choice for many general-purpose applications, whereas SS 316L is generally preferred where enhanced resistance to chlorides, seawater, or more aggressive chemical environments is required.

Stainless Steel 304L Seamless Pipe vs Welded Pipe

Stainless Steel 304L Seamless Pipes are manufactured without a longitudinal weld seam, while welded pipes are produced by forming stainless steel strip or plate and joining the edges through a welding process. The selection between seamless and welded construction depends on pressure, dimensions, application requirements, availability, and project specifications.

Property SS 304L Seamless Pipe SS 304L Welded Pipe
Manufacturing Produced without a longitudinal weld seam Manufactured by forming and welding strip or plate
Weld Seam No weld seam Contains a longitudinal welded joint
Pressure Applications Suitable for demanding pressure applications Suitable according to applicable specification and design
Surface Finish Available in various specified finishes Weld area may require finishing or treatment
Size Availability Commonly available in standard seamless size ranges Can provide a wide range of diameters and wall thicknesses
Cost Generally higher manufacturing cost Generally more economical for many larger sizes
Typical Selection Pressure, critical process, and demanding piping systems General process, structural, and fluid-handling applications

The choice between SS 304L Seamless Pipes and welded pipes should be based on the required pressure rating, pipe dimensions, operating conditions, applicable ASTM or ASME specification, and project requirements.

Kamal Steels is a Stainless Steel 304L Seamless Pipes Manufacturer & Stockist in India, supplying SS 304L pipes in different sizes, schedules, wall thicknesses, and lengths according to customer and project requirements.

Stainless Steel 304L Seamless Pipe Chemical Composition

Stainless Steel 304L is a low-carbon austenitic stainless steel grade with good corrosion resistance, strength, toughness and weldability. Its lower carbon content compared with SS 304 makes it particularly suitable for welded components and piping systems where resistance to intergranular corrosion after welding is important.

Element Composition (%)
Carbon (C) 0.030 max
Manganese (Mn) 2.00 max
Phosphorus (P) 0.045 max
Sulfur (S) 0.030 max
Silicon (Si) 1.00 max
Chromium (Cr) 18.0–20.0
Nickel (Ni) 8.0–12.0
Nitrogen (N) 0.10 max
Iron (Fe) Balance

Mechanical Properties of SS 304L Seamless Pipe

Property Value
Tensile Strength 485 MPa min
Yield Strength 170 MPa min
Elongation 40% min

The low carbon content of SS 304L makes the grade well suited to welded and fabricated piping systems. Actual chemical composition and mechanical properties should always be verified against the applicable ASTM/ASME specification and the Material Test Certificate (MTC) supplied with the material.

Stainless Steel 304L Seamless Pipe Applications

Stainless Steel 304L Seamless Pipes are used in piping and process systems where good corrosion resistance, low carbon content, and reliable performance are required. The low carbon composition makes 304L particularly suitable for applications involving welding and fabrication.

Application Typical Use
Chemical Processing Process piping and transfer lines handling suitable chemical media.
Food Processing Process piping and hygienic fluid-handling systems.
Pharmaceutical Equipment Clean process piping and equipment requiring corrosion resistance.
Petrochemical Processing Process and utility piping in suitable corrosive environments.
Water Treatment Water, wastewater, and treatment-process piping systems.
Heat Exchangers Selected heat-transfer and process equipment applications.
Process Equipment Pressure piping and fabricated equipment requiring low-carbon stainless steel.
General Engineering Industrial piping, equipment, and fabricated components.

Industries Using Stainless Steel 304L Seamless Pipes

Stainless Steel 304L Seamless Pipes are used across industries that require corrosion-resistant piping with a low-carbon stainless steel grade, particularly where welding and fabrication are part of the overall system.

Industry Typical Applications
Chemical Industry Chemical process piping and fluid transfer systems.
Food & Beverage Industry Hygienic processing, fluid handling and utility piping.
Pharmaceutical Industry Process piping and equipment requiring cleanliness and corrosion resistance.
Petrochemical Industry Process, utility and equipment piping applications.
Oil & Gas Industry Selected process and utility piping applications.
Water Treatment Industry Water treatment, wastewater and fluid distribution systems.
Power Generation Utility and process piping in suitable service conditions.
Engineering & Fabrication Industrial equipment, fabricated systems and process piping.

Kamal Steels is a Stainless Steel 304L Seamless Pipes Manufacturer & Stockist in India, supplying SS 304L Seamless Pipes in various sizes, schedules, wall thicknesses and lengths for domestic and international industrial requirements.

Frequently Asked Questions

Stainless Steel 304L Pipe is a low-carbon austenitic stainless steel pipe known for its excellent corrosion resistance, weldability and durability. It is widely used in industrial piping, process plants and commercial applications.

304L stainless steel tubes are commonly used in chemical processing, pharmaceutical manufacturing, food processing, water treatment plants, heat exchangers and industrial piping systems where corrosion resistance is essential.

The primary difference is carbon content. Stainless Steel 304L contains a maximum of 0.03% carbon compared to 0.08% in SS 304. This lower carbon content improves weldability and reduces the risk of intergranular corrosion after welding.

304L stainless steel is widely used in pipes because it provides excellent corrosion resistance, high strength, long service life and superior performance in welded applications without requiring post-weld heat treatment.

Yes, Stainless Steel 304L is considered food grade and is extensively used in food processing equipment, beverage production facilities and sanitary piping systems due to its hygienic and corrosion-resistant properties.

Yes, 304L stainless steel pipes are suitable for potable water systems, water treatment facilities and industrial water applications because of their excellent corrosion resistance and durability.

Stainless Steel 304L Pipes are widely used in oil & gas, petrochemical, chemical processing, pharmaceutical, food processing, power generation, marine and water treatment industries.

The price of 304L stainless steel pipe depends on pipe size, wall thickness, schedule, quantity and market conditions. Contact Kamal Steels for the latest Stainless Steel 304L Pipe Price and stock availability.

Stainless Steel 304L typically contains 18–20% Chromium, 8–12% Nickel and a maximum carbon content of 0.03%, providing excellent corrosion resistance, strength and weldability.

SS 316 offers better resistance to chlorides and marine environments due to its molybdenum content. SS 304L is more economical and suitable for most general industrial, food processing and water handling applications.

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