304 Stainless Steel Seamless Pipe – SS 304 Seamless Tube

Stainless steel 304 pipe manufacturer in India
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304 Stainless Steel Seamless Pipe

304 Stainless Steel Seamless Pipe is an austenitic stainless steel pipe manufactured without a longitudinal welded seam. It is widely used across industrial, food-processing, water, architectural, chemical and general engineering applications because of its combination of corrosion resistance, strength, fabrication properties and versatility.

The product may also be searched as seamless 304 stainless steel tubing, stainless steel 304 pipes, SS 304 seamless pipe, or SS 304 seamless tube.

For industrial procurement, the correct product should be selected according to the grade, applicable standard, pipe dimensions, wall thickness, schedule, length, operating conditions and inspection requirements.

20+
Years of Experience
50+
Grades in Stock
1/8"–24"
Size Range
100%
Quality Tested

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Technical Specifications

304 stainless steel pipe specifications

View ASTM A312 TP304 seamless pipe specifications and check SS 304 welded pipe size ranges from 1/8" to 24".

SpecificationDetails
End
  • Beveled
  • Plain
Finish
  • Bright
  • Polished
  • Annealing
Features
  • Durability
  • Versatility
  • Rigidity
  • Ease of Fabrication
Services
  • Heat Treatment
  • Cutting
  • Shearing
Standards
  • SUS, GB, AISI, ASME
  • API, EN, DIN, UNS
  • ASTM A312, ASTM A358, ASTM A249
Testing
  • Length: 6 meters
  • OD: 1" to 7/8"
  • Size: 1/2 to 16 inch NB
Seamless size
  • Length: 4 to 7 meters
  • OD: 1/8 to 12"
  • Wall Thk: 0.6 to 12.7 mm
Welded size
  • Length: 6 to 12 meters
  • Wall Thickness: 1–20 mm
  • OD: 1/4–36"
ERW size
  • OD: 6.35–114.3 mm
  • Length: up to 26 meter
  • Wall Thickness: 0.8–12.7 mm
Stainless steel 304 pipe

Stainless steel 304 pipe

304 stainless steel exhaust pipes

304 stainless steel exhaust pipes

Stainless steel 304 ERW pipe

Stainless steel 304 ERW pipe

SS 304 welded pipe

SS 304 welded pipe

SS 304 seamless pipe

SS 304 seamless pipe

ASME SA312 SS 304 round pipes

ASME SA312 SS 304 round pipes

Commercial Info

SS 304 pipe price list

Get the latest 304 stainless steel seamless pipe price list from leading SS 304 pipe manufacturers in India.

DescriptionPrice (USD)Price/kg (INR)
Round SS304 Pipe, 2 inch, 4 mm$ 2.68₹ 230
Rectangle 304 SS Pipe, 6 meter$ 2.10₹ 180
304 SS Pipes, 1/2 inch, 3/4 inch$ 0.82₹ 70
HSN Code

SS 304 seamless pipe HSN code

For customs & import/export documentation.

HSN Code
73041110
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Dimensional & Pressure Data

SS 304 pipe sizes & pressure rating

Complete size and pressure reference for AISI 304 pipe in various NPS and schedule configurations.

SS 304 pipe sizes
NPS (inch)Wall Thickness (inch)
1/40.088
3/80.091
1/20.147
3/40.113
3/40.154
10.179
10.133
1-1/40.14
1-1/20.109
1-1/20.145
1-1/20.2
20.109
20.154
20.065
20.218
2-1/20.203
30.12
30.083
30.216
3-1/20.318
40.237
50.134
60.109
80.322
304 stainless pipe pressure rating
NPS (inch)SchTemperature (°F)
750700650600500400300200100
180250125282580265927913002326536344213
1 1/240134013541383142514961608175019472257
2160267126992755284029803205348638804499
340107210841106114011961287140015581806
480131413281355139714661577171519092213
5160202720492091215522622433264629453414
64072473274777080886994510521219
880100510151036106811211205131114591692
1080956966986101610661147124713881609
160186818801927198620852242243927143147
Weight Reference

SS 304 sch 10 pipe weight chart

Pipe weight per foot across common NPS and schedule combinations for stainless steel 304 pipe.

SS 304 pipe weight in lbs/ft
ID (inch)Wall ThicknessNPS (inch)OD (inch)Weight (lbs/ft)Schedule
.364.0881/4.54.4340
.493.0913/8.675.57340
.546.1471/2.84.8640
.546.1471/2.841.09880
.824.1133/41.051.1440
.742.1543/41.051.48780
1.049.13311.3151.4210
.957.17911.3151.68940
.957.17911.3152.19280
1.38.141-1/41.662.2940
1.682.1091-1/21.92.110
1.61.1451-1/21.92.7440
1.5.21-1/21.93.66580
2.245.06522.3751.65
2.157.10922.3752.63810
2.067.15422.3753.6940
1.939.21822.3755.06980
2.469.2032-1/22.8755.8140
3.334.08333.53.0295
3.26.1233.54.3710
3.068.21633.57.64740
3.364.3183-1/2412.580
4.026.23744.510.8940
5.295.13455.5637.7710
6.407.10966.6257.665
7.981.32288.62528.8240
Material Data

304 pipe chemical, mechanical & equivalent grades

Reference data for chemical composition, mechanical properties, and international equivalent grades of SS 304 pipe.

304 pipe chemical composition
GRADESMnSCrPNiCSi
304 Pipe20.0318.0–20.00.0458.0–11.00.081
SS 304 pipe mechanical properties
GradeTensile (MPa)Yield (MPa)Elong (%)Hardness
RockwellBrinell
3045152054092201
Equivalent grades
GradeUNS NoOld BritishEuronormJISSS
BSEnNoName
304S30400304S3158E1.4301X5CrNi18-10SUS 3042332
Surface & Dimensional Properties

304 SS pipe roughness & wall thickness

Reference values for pipe surface roughness Ra and wall thickness across standard NPS sizes.

304 stainless steel pipe roughness
Surface FinishRoughness – Ra
Cold Drawn, Bright Annealed0.2 to 0.4 μm
Hot Finished, Scoured0.5 to 1.5 μm
Mill Finish1.0 to 3.0 μm
Electropolished0.1 to 0.3 μm
Mechanical Polish0.1 to 0.5 μm
304 SS pipe wall thickness
NPSOD (inch)OD (mm)Wall (inch)Wall (mm)Wt (lb/ft)Wt (kg/m)
1/2″.84021.3.0832.11.681
1″1.31533.4.1092.771.412.11
1 1/2″1.90048.3.1092.772.13.13
2″2.37560.3.1092.772.663.96
3″3.50088.9.1203.054.376.50
4″4.500114.3.1203.055.668.42
6″6.625168.3.1343.409.3513.91
10″10.750273.1.1654.1918.7927.96
14″14.000355.6.1884.7827.9741.62
18″18.000457.0.1884.7836.0553.65
22″22.000559.0.2185.5451.1476.10
30″30.000762.0.3127.9299.60148.22
Calculation Guide

How to calculate SS 304 pipe weight?

Use the standard formula — weight considers outer diameter, wall thickness, and pipe length to determine weight in kg/m.

Formula

Weight (kg/m) = 0.02466 × (OD – WT) × WT

OD = Outer Diameter (mm) · WT = Wall Thickness (mm)
How to calculate SS 304 pipe weight?
Schedule Charts

SS 304 pipe dimension charts

Sch 10 and Sch 40 dimensional reference — NPS, OD, ID, and wall thickness.

Sch 10 304 SS pipe dimensions
NPS (inch)SizesODIDLength (inch)Wall Thk
1/2SCH100.840.5462400.147
3/41.050.7420.154
11.3150.9570.179
1-1/21.91.50.2
22.3751.9390.218
3-1/243.3640.318
SS 304 sch 40 pipe thickness chart
NPSOutside Dia (OD)Wall Thickness (Sch 40)
1/8"0.405" (10.29 mm)0.068" (1.73 mm)
1/4"0.540" (13.72 mm)0.088" (2.24 mm)
3/8"0.675" (17.15 mm)0.091" (2.31 mm)
1/2"0.840" (21.34 mm)0.109" (2.77 mm)
3/4"1.050" (26.67 mm)0.113" (2.87 mm)
1"1.315" (33.40 mm)0.133" (3.38 mm)
1-1/4"1.660" (42.16 mm)0.140" (3.56 mm)
1-1/2"1.900" (48.26 mm)0.145" (3.68 mm)
2"2.375" (60.33 mm)0.154" (3.91 mm)
2-1/2"2.875" (73.03 mm)0.203" (5.16 mm)
3"3.500" (88.90 mm)0.216" (5.49 mm)
3-1/2"4.000" (101.60 mm)0.226" (5.74 mm)
4"4.500" (114.30 mm)0.237" (6.02 mm)
5"5.563" (141.30 mm)0.258" (6.55 mm)
6"6.625" (168.28 mm)0.280" (7.11 mm)
8"8.625" (219.08 mm)0.322" (8.18 mm)
10"10.750" (273.05 mm)0.365" (9.27 mm)
12"12.750" (323.85 mm)0.375" (9.53 mm)
14"14.000" (355.60 mm)0.375" (9.53 mm)
16"16.000" (406.40 mm)0.375" (9.53 mm)
18"18.000" (457.20 mm)0.375" (9.53 mm)
20"20.000" (508.00 mm)0.375" (9.53 mm)
24"24.000" (609.60 mm)0.500" (12.70 mm)
Schedule Reference

SS 304 seamless pipe schedule chart

Wall thickness in mm for SS 304 seamless pipe across all standard schedule designations (5S, 10S, 40S, 80S).

SS 304 pipe schedule chart (wall thickness in mm)
NPSOD (mm)SCH 5SSCH 10SSCH 40SSCH 80S
1/413.72–1.652.243.02
3/817.15–1.652.313.2
1/221.341.652.112.773.73
3/426.671.652.112.873.91
133.41.652.773.384.55
1.2542.161.652.773.564.85
1.548.261.652.773.685.08
260.331.652.773.915.54
2.573.032.113.055.167.01
388.92.113.055.497.62
3.5101.62.113.055.748.08
4114.32.113.056.028.56
5141.32.773.46.559.53
6168.282.773.47.1110.97
8219.082.773.768.1812.7
10273.053.44.199.2712.7
12323.853.964.579.5312.7
14355.63.964.789.5312.7
16406.44.194.789.5312.7
18457.24.194.789.5312.7
205084.785.549.5312.7
22558.84.785.54––
24609.65.546.359.5312.7
Physical & Thermal Properties

Physical properties, temperature rating & surface finish

Complete physical, thermal, and surface data for UNS S30400 / SUS 304 welded and seamless pipe.

Physical properties of UNS S30400 welded pipe
Grade Thermal Conductivity (W/m.K) Electrical Resistivity (n.m) Elastic Modulus (GPa) Density (kg/m³) Mean Coeff. Thermal Expansion (m/m/°C) Specific Heat (J/kg.K)
at 100°Cat 500°C0-100°C0-315°C0-538°C
304
16.221.5720193800017.217.818.4500
304 SS pipe temperature rating
Temperature (°C)Allowable Stress (MPa)
100°C (212°F)133.4 MPa
200°C (392°F)111.2 MPa
300°C (572°F)93.2 MPa
400°C (752°F)79.3 MPa
500°C (932°F)68.9 MPa
600°C (1112°F)60.7 MPa
700°C (1292°F)55.2 MPa
800°C (1472°F)51.7 MPa
850°C (1562°F)50.3 MPa
900°C (1652°F)48.9 MPa
925°C (1697°F)47.8 MPa
SUS 304 ERW pipe surface finish
Surface FinishID (RA)OD (RA)
μ inchμmμ inchμm
APAnnealed & PickledNot definedNot defined40 / Not defined1 / Not defined
MPMechanical Polish40/32/25/201.0/0.8/0.6/0.532.8
BABright Annealed40/32/25/201.0/0.8/0.6/0.532.8
EPElectro Polish15/10/7/50.38/0.2532.8
Industries Served

WNR 1.4301 round pipes applications

ASME SA312 SS 304 round pipes and stainless steel 304 ERW pipe are used in automotive industries, chemical plants, and many other high-demand sectors.

Chemicals

Construction

Automotive Industry

Pulp and Paper

Power Plants

Pesticides

Oil and Gas Processing

Desalination

Ship Building

Pharmaceuticals

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Our pipe & tube product range

We manufacture and supply a wide range of stainless steel, carbon steel, alloy, duplex, and specialty pipes — all quality tested and ready to ship.

Stainless Steel Pipes

SS ERW Pipe SS 304L Pipe SS 310S Pipe SS 316 Pipe SS 316L Pipe 316Ti Pipe 317L Pipe SS 321 Pipe SS 347 Pipe 904L Pipe SS Welded Pipe SS Schedule Pipe ASTM A312 Pipe 254 SMO Pipe

Carbon & Alloy Steel Pipes

Carbon Steel Pipe ASTM A106 Gr.B ASTM A53 Gr.B ASTM A333 Gr.6 API 5L Gr.B ASTM A335 P5 ASTM A335 P9 ASTM A335 P11 ASTM A335 P22 ASTM A335 P91

Duplex, Nickel & Specialty

Duplex 2205 Super Duplex 2507 Nickel 200 Inconel 600 Inconel 625 Inconel 718 Hastelloy C276 Hastelloy C22 Monel 400 Titanium Gr.2

What Is 304 Stainless Steel Seamless Pipe?

304 stainless steel seamless pipe is made from Type 304 austenitic stainless steel and is produced without a longitudinal welded joint.

The seamless construction can be specified for applications where the project requires seamless pipe rather than welded pipe.

Key characteristics of SS 304 seamless pipe include:

  • Good general corrosion resistance
  • Good mechanical properties
  • Good formability
  • Good weldability
  • Austenitic stainless steel structure
  • Suitable for a broad range of industrial applications
  • Available in different pipe sizes and wall thicknesses according to applicable standards

304 is one of the most widely used stainless steel grades, making it a practical choice for many general-purpose applications.

Seamless 304 Stainless Steel Tubing

The term "seamless 304 stainless steel tubing" is commonly used when referring to smaller-diameter or precision tubular products.

Although the words pipe and tube are sometimes used interchangeably in general searches, they can have different dimensional standards and applications.

For procurement, specify whether you require:

  • Stainless steel pipe
  • Stainless steel tube
  • Outside diameter
  • Nominal pipe size
  • Wall thickness
  • Schedule
  • Length
  • Applicable product standard

This prevents the wrong dimensional product from being supplied.

SS 304 Seamless Pipe Applications

304 stainless steel seamless pipes are used across many industries.

Food & Beverage Industry
Used in suitable food-processing and fluid-handling systems.

Chemical Processing
Used in applications where the corrosion resistance of 304 is appropriate for the process environment.

Water Systems
Used in selected water, utility and fluid-handling applications.

Pharmaceutical Equipment
Used in suitable equipment and piping applications where material compatibility and surface requirements are satisfied.

Architectural Applications
Stainless steel 304 can be used in architectural and decorative applications where durability and appearance are important.

Industrial Machinery
Used in equipment, fabrication and general industrial systems.

Heat Exchangers
Can be used in appropriate heat-transfer applications based on the process environment.

Why Choose SS 304 Seamless Pipe?

304 stainless steel is commonly selected because it provides a practical balance between:

Corrosion resistance + strength + fabrication + availability + cost.

Its advantages include:

  • Good resistance to atmospheric corrosion
  • Good resistance to many common process environments
  • Good weldability
  • Good formability
  • Broad availability
  • Wide range of industrial applications

However, 304 is not suitable for every corrosive environment. Chloride exposure and aggressive chemical conditions may require consideration of alternative grades such as 316L or higher-alloy stainless steels.

How to Select the Right 304 Seamless Pipe

  1. Identify the Application

    Determine what the pipe will be used for and what fluid or material it will carry.

  2. Check the Operating Environment

    Consider:

    • Temperature
    • Pressure
    • Chemical exposure
    • Chloride exposure
    • Moisture
    • Outdoor/indoor conditions
  3. Specify Dimensions

    Clearly mention:

    • NPS
    • OD
    • Wall thickness
    • Schedule
    • Length
  4. Confirm the Standard

    Specify the applicable ASTM, ASME or project standard.

  5. Define Inspection Requirements

    For industrial projects, determine whether you require:

    • Material Test Certificate
    • Chemical analysis
    • Mechanical testing
    • Dimensional inspection
    • Hydrostatic testing where applicable
    • NDT where specified
    • Third-party inspection

Why Consider Spark Steel?

Spark Steel supplies stainless steel and metal products for industrial and architectural requirements.

For 304 stainless steel seamless pipe, customers should provide the complete technical specification so the required material can be evaluated for availability and quotation.

For a quotation, include:

  • Grade
  • Size
  • Schedule/wall thickness
  • Length
  • Quantity
  • Applicable standard
  • Inspection requirements
  • Documentation requirements

Frequently Asked Questions About 304 Stainless Steel Seamless Pipe

304 stainless steel seamless pipe is a tubular product manufactured from Type 304 austenitic stainless steel without a longitudinal welded seam.

Stainless steel 304 pipes are used in food processing, water systems, chemical processing, industrial equipment, architectural applications and general fabrication.

Yes. 304 stainless steel provides good general corrosion resistance in many atmospheric and industrial environments.

Yes. 304 stainless steel is widely used in suitable food-processing applications.

316L contains molybdenum and generally provides better resistance to pitting and crevice corrosion in many chloride-containing environments, while 304 is widely used for general-purpose applications.

Yes. 304 stainless steel has good weldability when suitable welding procedures are used.

Available sizes depend on the applicable dimensional standard and supplier's manufacturing range. Specify the required NPS/OD, wall thickness or schedule and length for an accurate availability check.

There is no single price for all 304 seamless pipes. Pricing depends on grade specification, dimensions, schedule, quantity, length, testing, documentation and current market conditions. Contact us for a specific quotation.

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