Stainless Steel 304 Pipe Manufacturer in India

Stainless Steel 304 pipe is commonly designated as Type 304 or TP304, depending on the applicable product specification. ASTM A312/A312M covers applicable seamless, straight-seam welded and heavily cold-worked welded austenitic stainless steel pipes for high-temperature and general corrosive service.

The material specification and dimensional standard should be selected according to the application, design code and purchase requirements.

A material specification defines requirements such as chemical composition and mechanical properties. A dimensional standard establishes nominal pipe dimensions and applicable wall-thickness series. Both must be considered when specifying a pipe.

For broader dimensional and standard information, see our Stainless Steel 304 Pipe Specifications page.

Stainless Steel 304 pipe is specified using nominal pipe size (NPS) and corresponding nominal diameter (DN) designations. The nominal size is not necessarily the measured outside diameter. Confirm the required dimensions against the applicable standard before ordering.

Note: These are representative nominal outside diameters. Confirm the applicable dimensional standard, tolerances, size range and product availability before ordering.

When selecting a pipe, specify the nominal size and required wall thickness or schedule. Outside diameter, inside diameter and wall thickness are related but are not interchangeable measurements.

Pipe schedule identifies a wall-thickness series for a given nominal pipe size. Stainless steel pipe commonly uses schedules such as 5S, 10S, 40S and 80S under ASME B36.19M, where the relevant size and schedule are covered.

Schedule 10S generally has a thinner wall than Schedule 40S at the same nominal size. The difference varies by size, so the actual dimensions must be checked rather than inferred from the schedule name.

Schedule 10S vs Schedule 40S Pipe Dimensions

Technical note: Verify every listed value against the applicable edition of ASME B36.19M before publication. The schedule series does not include every possible size and wall-thickness combination.

How to Choose the Required Pipe Schedule

Schedule selection depends on design pressure, operating temperature, material properties, corrosion allowance, mechanical loads, applicable design code and project requirements.

A thicker wall generally reduces the internal diameter for the same outside diameter and increases the theoretical weight per metre. It does not, by itself, establish a safe operating pressure. Pressure suitability must be determined using the applicable design rules and actual operating conditions.

The theoretical weight of stainless steel pipe can be estimated using its outside diameter and wall thickness. This calculation is useful for preliminary material estimates, transport planning and comparing pipe dimensions.

Approximate formula: Weight (kg/m) = 0.0249 × t × (D − t)

• D = outside diameter in millimetres
• t = wall thickness in millimetres

The formula assumes a material density of approximately 7,930 kg/m³. The resulting value is theoretical and may differ from actual measured weight.

SS 304 Pipe Weight Chart - Selected Schedule 40S Sizes

Note: Recalculate each value using verified dimensional data before publication. Actual pipe weight can vary with manufacturing tolerances and material conditions.

The weight per metre is not the same as the price per metre. A quotation may also depend on manufacturing method, length, quantity, testing requirements, packaging and delivery terms.

Type 304 stainless steel contains chromium and nickel, which contribute to its austenitic structure and general corrosion resistance. The applicable product specification defines the permitted composition limits.

Note: Confirm these limits against the applicable edition of the ordered product specification. Actual heat analysis should be checked against the material test certificate supplied for the product.

Mechanical properties are used to evaluate material compliance with applicable product and design requirements. The following are commonly specified minimum tensile and yield strength values for TP304 pipe under ASTM A312/A312M. Requirements for elongation, hardness and other tests depend on the applicable specification and test conditions.

These minimum material properties should not be used alone to determine allowable operating pressure. Design calculations must follow the applicable design code and account for temperature, dimensions, joints and service conditions.

Stainless Steel 304 Seamless Pipe

Seamless pipe is manufactured without a longitudinal weld seam. It may be specified where the governing product specification, design code or application requires seamless construction.

When selecting stainless steel 304 seamless pipe, confirm the required size, wall thickness, product specification, testing requirements and dimensional tolerances. Seamless construction is not automatically necessary for every application; selection should follow the engineering requirements.

Learn more about Stainless Steel 304 Seamless Pipes.

Stainless Steel 304 Welded Pipe

Welded pipe is manufactured by forming stainless steel material and joining the seam using a specified welding process. It is used in a range of industrial and general piping applications.

Selection should account for the applicable product specification, weld quality requirements, inspection, dimensions and intended service. Do not assume that all welded products have the same manufacturing or inspection requirements.

304 Stainless Steel Round Pipe

Round stainless steel 304 pipe is commonly used for fluid transport and process piping. It is specified using nominal pipe size, outside diameter, wall thickness or schedule, length and applicable product standard.

For decorative, architectural or structural hollow sections, confirm whether a pipe specification or a separate tube or structural-section specification is required. Product form and dimensions should match the intended application.

Food Processing and Beverage Equipment

SS 304 pipe is used in selected food-processing and beverage installations where its corrosion resistance is appropriate. Suitability for hygienic or food-contact service depends on surface finish, fabrication, cleaning procedures, product chemistry and applicable hygiene or regulatory requirements.

Grade 304 alone does not guarantee suitability for every sanitary application. Specify any required internal finish, cleaning procedure, testing and compliance requirements.

Plumbing and Water Systems

Stainless steel 304 pipe may be suitable for certain water and plumbing applications. Water chemistry, chloride concentration, temperature, disinfection methods and local plumbing requirements affect material selection.

Where water chemistry or service conditions are aggressive, another material or grade may be more appropriate. Selection should be based on the actual operating environment.

Chemical and Industrial Processing

Grade 304 pipe is used for selected industrial process lines and equipment handling compatible substances. It is not suitable for every chemical environment.

Before specifying the material, consider chemical concentration, operating temperature, exposure duration, contaminants and the potential for pitting or crevice corrosion. Confirm material compatibility with process requirements.

Construction and General Fabrication

SS 304 is used in handrails, architectural components, fabrication and general industrial assemblies where its appearance, formability and corrosion resistance are useful.

For structural applications, verify the required product standard, dimensions, mechanical properties and applicable design requirements rather than assuming every stainless steel pipe is suitable for structural use.

SS 304, 304L and 316 are austenitic stainless steel grades with different chemical composition limits and selection considerations. The appropriate grade depends on the operating environment, fabrication method and design requirements.

Note: Composition limits depend on the applicable product specification. None of these grades is suitable for every environment. Chlorides, temperature, crevices, surface condition and stress can affect corrosion performance.

Surface finish, inspection and documentation requirements should be agreed when the product is specified. They can differ according to the product standard and intended application.

EN 10204 Type 3.1 documentation may be specified where applicable and agreed for the order. Buyers should confirm the certificate type, inspection scope and testing requirements when requesting a quotation. These requirements should not be assumed to be included in every supply.

The price of stainless steel 304 pipe depends on its dimensions, product specification, manufacturing method and order requirements. A single price-per-metre figure cannot reliably represent every size and type.

For a meaningful quotation, provide the grade, nominal size, wall thickness or schedule, seamless or welded construction, required length, quantity, applicable standard, destination and documentation requirements.

For related pricing information, visit our Stainless Steel Pipe Price Per Kg in India guide.

To request a quotation from Kamal Steels, provide the details relevant to your requirement:

• Grade: SS 304 / TP304
• Product type: seamless or welded
• Nominal pipe size or outside diameter
• Schedule or required wall thickness
• Applicable material and dimensional standards
• Required length and quantity
• Testing, inspection and material certificate requirements
• Delivery destination and packaging requirements

Providing these details helps clarify the required product specification and supports a more accurate quotation. Confirm product availability, manufacturing scope, lead time and documentation requirements for the specific order.