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Girgaon, Mumbai - 400004
Stainless Steel 304 Welded Pipes Manufacturer in India
What are Stainless Steel 304 Welded Pipes?
Stainless Steel 304 Welded Pipes are austenitic stainless steel pipes manufactured by forming stainless steel strip or plate into a cylindrical shape and joining the edges through a controlled welding process. Grade 304 is one of the most widely used stainless steel grades because it provides a combination of corrosion resistance, strength, formability and durability for a broad range of industrial applications.
Stainless Steel 304 Welded Pipes are available in various outside diameters, wall thicknesses, schedules and lengths to suit different piping requirements. They can be supplied with different surface finishes and manufactured according to applicable ASTM, ASME and other project specifications. Their welded construction makes them suitable for a wide range of process, utility, structural and fluid-handling systems.
Due to their good resistance to corrosion and oxidation, SS 304 Welded Pipes are used in food processing, chemical processing, pharmaceutical equipment, water treatment, architectural systems, heat exchangers and general industrial piping. Proper welding, finishing and testing help ensure consistent quality and dimensional performance for the intended service conditions.
Kamal Steels is a Stainless Steel 304 Welded Pipes Manufacturer & Stockist in India, supplying SS 304 Welded Pipes in standard and customized sizes, schedules, wall thicknesses and lengths. Products can be supplied with applicable testing, inspection, material certificates and documentation according to customer and project specifications.
Table of Contents
- Stainless Steel 304 Welded Pipe Specifications
- Stainless Steel 304 Welded Pipe Features
- Stainless Steel 304 Welded Pipe Size Chart
- Stainless Steel 304 Welded Pipe Weight Chart
- Stainless Steel 304 Welded Pipe Schedule Chart
- ASTM A312 TP304 Welded Pipe
- Stainless Steel 304 Welded Pipe vs Seamless Pipe
- Stainless Steel 304 Welded Pipe Chemical Composition
- Stainless Steel 304 Welded Pipe Mechanical Properties
- Stainless Steel 304 Welded Pipe Equivalent Grades
- Stainless Steel 304 Welded Pipe Applications
- Industries Using Stainless Steel 304 Welded Pipes
- Frequently Asked Questions About Stainless Steel 304 Welded Pipes
Stainless Steel 304 Welded Pipe Specifications
| Specification | Details |
|---|---|
| Product Name | Stainless Steel 304 Welded Pipe |
| Grade | SS 304 / Type 304 / TP304 |
| UNS | S30400 |
| EN Grade | 1.4301 |
| Material Type | Austenitic Stainless Steel |
| Manufacturing Process | ERW / Welded / EFW |
| Primary Product Standard | ASTM A312 / ASTM A312M |
| Other Standards | ASTM A358, ASTM A778 |
| ASME Material Specification | ASME SA312 / SA312M |
| Dimensional Standard | ASME B36.19M / ASME B36.10M |
| Outside Diameter | 6 mm to 610 mm |
| Wall Thickness | 0.5 mm to 50 mm |
| Schedule | SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160, XS, XXS |
| Length | 6 m, Single Random, Double Random or Cut Length |
| End Type | Plain End, Bevel End or Threaded End |
| Surface Finish | Annealed & Pickled (AP), Bright Annealed (BA), 2B, No.1, No.4, Hairline, Mirror Polish |
| Testing | Hydrostatic Test, PMI, Radiography, Eddy Current, Flattening Test, Flaring Test and Visual Inspection |
| Inspection | In-house Inspection and Third-Party Inspection Available |
| Certification | EN 10204 3.1 Mill Test Certificate (MTC) |
| Packaging | Bundles, Wooden Boxes, Export Packing and Plastic End Caps |
Features of Stainless Steel 304 Welded Pipes
Stainless Steel 304 Welded Pipe Size Chart
Stainless Steel 304 Welded Pipes are manufactured in a wide range of nominal pipe sizes to meet the requirements of industrial process piping, fabrication, water treatment, food processing and general engineering applications. The outside diameter is standardized in accordance with ASME B36.19M, while the available wall thickness depends on the selected schedule and manufacturing specification.
| NPS / Size | Outside Diameter (OD) | Typical Applications |
|---|---|---|
| 1/8" | 10.3 mm | Instrumentation & Small Bore Lines |
| 1/4" | 13.7 mm | General Utility Piping |
| 1/2" | 21.3 mm | Process & Utility Services |
| 3/4" | 26.7 mm | Industrial Fluid Transfer |
| 1" | 33.4 mm | Chemical & Process Piping |
| 1-1/4" | 42.2 mm | General Industrial Applications |
| 1-1/2" | 48.3 mm | Fabrication & Utility Lines |
| 2" | 60.3 mm | Water & Process Systems |
| 3" | 88.9 mm | Industrial Process Piping |
| 4" | 114.3 mm | Plant Utility Services |
| 6" | 168.3 mm | Large Process & Distribution Lines |
Standard outside diameters are specified by ASME B36.19M. Available wall thicknesses, schedules and lengths depend on the applicable ASTM specification, manufacturing process and project requirements.
Stainless Steel 304 Welded Pipe Weight Chart
The following table shows the approximate theoretical weight per metre of Stainless Steel 304 Welded Pipes. Weight is calculated using nominal outside diameter and wall thickness based on ASME B36.19M dimensions.
Weight (kg/m) = (OD − WT) × WT × 0.02491
The calculation uses a stainless steel density of approximately 7.93 g/cm³. Actual weight may vary depending on manufacturing tolerances and applicable standards.
| NPS | Outside Diameter (mm) | Schedule | Wall Thickness (mm) | Theoretical Weight (kg/m) |
|---|---|---|---|---|
| 1/2" | 21.34 | 10S | 2.11 | 1.01 |
| 1/2" | 21.34 | 40S | 2.77 | 1.28 |
| 1/2" | 21.34 | 80S | 3.73 | 1.64 |
| 3/4" | 26.67 | 10S | 2.11 | 1.29 |
| 3/4" | 26.67 | 40S | 2.87 | 1.70 |
| 3/4" | 26.67 | 80S | 3.91 | 2.21 |
| 1" | 33.40 | 10S | 2.77 | 2.11 |
| 1" | 33.40 | 40S | 3.38 | 2.54 |
| 1" | 33.40 | 80S | 4.55 | 3.27 |
| 2" | 60.33 | 10S | 2.77 | 3.99 |
| 2" | 60.33 | 40S | 3.91 | 5.49 |
| 2" | 60.33 | 80S | 5.54 | 7.58 |
| 4" | 114.30 | 10S | 3.05 | 8.46 |
| 4" | 114.30 | 40S | 6.02 | 16.24 |
| 4" | 114.30 | 80S | 8.56 | 22.60 |
Formula: Weight (kg/m) = (OD − WT) × WT × 0.02491
The values above are approximate theoretical weights based on ASME B36.19M dimensions. Actual supplied weights may vary according to ASTM dimensional tolerances and manufacturing variations.
Stainless Steel 304 Welded Pipe Schedule Chart
Pipe schedule refers to the nominal wall thickness of a stainless steel pipe. The appropriate schedule should be selected according to design pressure, operating temperature, corrosion allowance and applicable piping codes.
| Schedule | Wall Thickness | Typical Applications |
|---|---|---|
| SCH 5S | Light Wall | Low-pressure process lines and lightweight piping systems |
| SCH 10S | Light Wall | General industrial and process piping |
| SCH 40S | Medium Wall | Standard industrial service and fluid transportation |
| SCH 80S | Heavy Wall | Higher-pressure industrial applications |
| SCH 160 | Extra Heavy Wall | Heavy-duty process piping requiring thicker walls |
| XS | Extra Strong | High-pressure service and demanding industrial applications |
| XXS | Double Extra Strong | Very high-pressure and severe operating conditions |
The selection of pipe schedule should always be based on the applicable design code, service conditions, operating pressure, temperature, corrosion requirements and project specifications.
ASTM A312 TP304 Welded Pipe
ASTM A312 TP304 Welded Pipe is manufactured from Type 304 austenitic stainless steel in accordance with ASTM A312 specifications for high-temperature and general corrosive service. TP304 is identified by UNS S30400 and is one of the most widely used stainless steel grades for industrial piping systems due to its corrosion resistance, weldability and mechanical strength.
ASTM A312 TP304 Welded Pipes are produced by forming stainless steel strip or plate into a tubular shape and joining the edges using an approved welding process. The pipes are available in a wide range of nominal sizes, schedules, wall thicknesses, lengths, end types and surface finishes to meet different project requirements.
Kamal Steels supplies ASTM A312 TP304 Welded Pipes with Mill Test Certificates (EN 10204 3.1), third-party inspection, custom lengths and export-standard packaging. Our pipes are suitable for process piping, chemical processing, food processing, pharmaceutical, water treatment, petrochemical and general industrial applications.
Stainless Steel 304 Welded Pipe vs Seamless Pipe
The primary difference between Stainless Steel 304 Welded Pipe and Stainless Steel 304 Seamless Pipe is the manufacturing process. Welded pipes are produced by forming stainless steel strip or plate into a cylindrical shape and welding the longitudinal seam, while seamless pipes are manufactured from a solid billet without a welded joint. The selection depends on the application, operating conditions, applicable standards and project specifications.
| Feature | SS 304 Welded Pipe | SS 304 Seamless Pipe |
|---|---|---|
| Manufacturing Process | Formed from stainless steel strip or plate and joined by welding | Manufactured from a solid billet without a longitudinal weld seam |
| Longitudinal Weld | Contains a welded seam | No welded seam |
| Dimensional Availability | Available in a wide range of diameters, including larger sizes | Available in standard pipe sizes subject to manufacturing capability |
| Wall Thickness | Thin to heavy wall depending on specification | Available in standard schedules and heavier wall options |
| Cost | Generally more economical | Generally higher due to manufacturing process |
| Typical Applications | Process piping, structural fabrication, water lines and industrial services | High-pressure process piping, critical services and industrial applications |
| Applicable Standards | ASTM A312, ASTM A358, ASTM A778 | ASTM A312, ASME SA312 |
The choice between welded and seamless pipe should be based on the required pressure, operating temperature, corrosion conditions, pipe dimensions, applicable codes and engineering design requirements. Both products are widely used in industrial piping systems when selected according to the relevant specification.
Stainless Steel 304 Welded Pipe Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.08 Max |
| Manganese (Mn) | 2.00 Max |
| Silicon (Si) | 0.75 Max |
| Phosphorus (P) | 0.045 Max |
| Sulphur (S) | 0.030 Max |
| Chromium (Cr) | 18.00 – 20.00 |
| Nickel (Ni) | 8.00 – 10.50 |
| Nitrogen (N) | 0.10 Max |
| Iron (Fe) | Balance |
Stainless Steel 304 Welded Pipe Mechanical Properties
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Range | 1400–1450°C |
| Tensile Strength | 515 MPa (Min) |
| Yield Strength | 205 MPa (Min) |
| Elongation | 35% (Min) |
| Hardness | 201 HB (Max) |
Stainless Steel 304 Welded Pipe Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | S30400 |
| EN | 1.4301 |
| DIN | X5CrNi18-10 |
| JIS | SUS 304 |
| BS | 304S31 |
| AFNOR | Z7CN18-09 |
| GOST | 08Х18Н10 |
Stainless Steel 304 Welded Pipe Applications
Stainless Steel 304 Welded Pipes are widely used for fluid handling, process piping and fabrication where good corrosion resistance, weldability and durability are required. The appropriate pipe dimensions, schedule and specification should be selected according to the operating conditions and project requirements.
| Application | Description |
|---|---|
| Process Piping | Chemical, pharmaceutical and food processing pipelines |
| Pressure Lines | Industrial fluid transfer systems designed to applicable codes |
| Heat Exchangers | Process piping and equipment connections |
| Boiler Systems | Auxiliary piping and utility services |
| Instrumentation | Process instrumentation and control lines |
| Structural Fabrication | Frames, supports and fabrication projects |
| Water Lines | Industrial and commercial water distribution systems |
| Steam Distribution | Steam and condensate piping where applicable |
Stainless Steel 304 Welded Pipes are selected according to the required pressure, temperature, corrosion conditions and applicable engineering specifications.
Industries Using Stainless Steel 304 Welded Pipes
Kamal Steels supplies Stainless Steel 304 Welded Pipes to a wide range of industrial sectors in India and international markets. Our products are supplied with complete documentation, testing and inspection as required.
| Industry | Typical Use |
|---|---|
| Oil & Gas | Process piping and utility services |
| Petrochemical | Plant piping and process equipment |
| Chemical | Corrosion-resistant process systems |
| Pharmaceutical | Clean process and utility piping |
| Food Processing | Hygienic piping systems |
| Marine | Marine equipment and fabrication |
| Water Treatment | Water distribution and treatment plants |
| LNG | Process and utility piping |
| Power Plant | Utility and auxiliary piping |
| Sugar Plant | Process pipelines and equipment |
| Mining | Industrial fluid handling systems |
| Desalination | Water treatment and desalination facilities |
The suitability of Stainless Steel 304 Welded Pipes depends on the service environment, operating temperature, fluid characteristics and applicable design standards. Material selection should always be verified for the intended application.
Frequently Asked Questions
Stainless Steel 304 Welded Pipe is manufactured by rolling stainless steel plates or coils into a cylindrical shape and welding the seam. It offers excellent corrosion resistance, high strength, good weldability and is widely used in industrial, commercial and structural applications.
SS 304 Welded Pipes are commonly manufactured according to ASTM A312, ASTM A358, ASTM A778, ASME SA312, ANSI B36.19M and ASME B36.10M standards to ensure consistent quality and dimensional accuracy.
These pipes provide excellent corrosion resistance, superior weldability, good mechanical strength, easy fabrication, attractive surface finish, low maintenance and long service life while remaining cost-effective.
Welded pipes are produced by welding stainless steel strip or plate, making them more economical and readily available in larger sizes. Seamless pipes are manufactured without a welded joint and are generally preferred for high-pressure and critical applications.
SS 304 Welded Pipes are available from 1/8" NB to 24" NB with schedules including SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160, XS and XXS. Custom sizes and cut lengths are also available.
These pipes are extensively used in chemical processing, food and beverage plants, pharmaceuticals, dairy industries, water treatment facilities, oil & gas, petrochemicals, heat exchangers, construction and architectural applications.
Quality tests typically include Hydrostatic Testing, PMI (Positive Material Identification), Radiography, Eddy Current Testing, Flattening Test, Flaring Test, Dimensional Inspection and Visual Examination.
Yes. Stainless Steel 304 Welded Pipes are supplied with Mill Test Certificates (EN 10204 3.1), inspection reports and third-party inspection certificates upon request.
Yes. They can be supplied in customized lengths, wall thicknesses, diameters, schedules, end preparations and surface finishes to meet specific project requirements.
Kamal Steels manufactures high-quality Stainless Steel 304 Welded Pipes using premium raw materials and advanced production techniques. We offer competitive pricing, strict quality control, fast delivery, complete documentation and worldwide export services.