Stainless Steel 304 Seamless Pipes

Stainless Steel 304 Seamless Pipe is a tubular product manufactured from Type 304 austenitic stainless steel without a longitudinal welded seam. It is produced by piercing a solid stainless steel billet and forming it into a hollow pipe, followed by sizing and processing to achieve the required outside diameter, wall thickness and length.

SS 304 Seamless Pipe is valued for its general corrosion resistance, strength, toughness, formability and weldability. It is used in process piping, chemical processing, food and pharmaceutical plants, water treatment, power generation, fabrication and general engineering applications.

Kamal Steels supplies Stainless Steel 304 Seamless Pipes and ASTM A312 TP304 Seamless Pipes in different sizes, schedules, wall thicknesses, lengths, end types and surface finishes. Material certificates, inspection documents and export packing can be provided according to project and customer requirements.

Actual outside diameter, wall thickness and schedule availability depend on the applicable standard and pipe size.

The following table provides the approximate theoretical weight per metre of Stainless Steel 304 Seamless Pipes. The values are calculated using nominal pipe dimensions and the following formula:

Weight (kg/m) = (OD − WT) × WT × 0.02491

The calculation uses a stainless steel density of approximately 7.93 g/cm³. Nominal outside diameters and wall thicknesses are based on ASME B36.19M dimensions.

Formula: Weight (kg/m) = (OD − WT) × WT × 0.02491

Example: For a 1/2-inch SS 304 seamless pipe with SCH 40S wall thickness:

(21.34 − 2.77) × 2.77 × 0.02491 = approximately 1.28 kg/m

Note: The above values are approximate theoretical weights calculated using nominal ASME B36.19M dimensions and a stainless steel density of 7.93 g/cm³. Values are rounded to two decimal places. Actual supplied weight may vary according to ASTM A312 dimensional tolerances, manufacturing conditions, surface finish, wall-thickness variation and length tolerances.

For accurate project requirements, confirm the required NPS, schedule, wall thickness, length, applicable specification and inspection requirements before placing an order.

Schedule selection should be based on design pressure, operating temperature, pipe dimensions, corrosion allowance, fluid service and the applicable piping code. A heavier schedule does not automatically confirm suitability for a particular pressure application.

ASTM A312 TP304 Seamless Pipe is an austenitic stainless steel pipe specified for general corrosive service and high-temperature applications. TP304 refers to Type 304 stainless steel, commonly identified by UNS S30400. The material provides a combination of corrosion resistance, strength, toughness, and good fabrication characteristics.

ASTM A312 TP304 seamless pipes are widely used in process piping, chemical processing, petrochemical plants, food processing, pharmaceutical facilities, power generation, and other industrial systems where reliable corrosion resistance and service performance are required.

Kamal Steels supplies ASTM A312 TP304 Seamless Pipes in different sizes, schedules, wall thicknesses, lengths, end configurations, and surface finishes according to project and application requirements.

Chemical Composition of ASTM A312 TP304 Seamless Pipe

The chemical composition values shown above apply to ASTM A312 TP304 stainless steel pipe. Final composition should be verified against the applicable ASTM specification and the Material Test Certificate (MTC) supplied with the pipe.

Mechanical Properties of ASTM A312 TP304 Seamless Pipe

The values shown above are typical minimum mechanical property requirements for ASTM A312 TP304 seamless pipe. Final values must be verified against the applicable edition of ASTM A312 and the Material Test Certificate (MTC) supplied with the pipe.

SS 304 and SS 316 are both austenitic stainless steel grades commonly used for seamless piping applications. The main difference is that SS 316 contains molybdenum, which generally provides improved resistance to chlorides and certain more aggressive environments compared with SS 304.

The main difference between seamless and welded SS 304 pipes is their manufacturing process. Seamless pipe is produced from a solid billet that is pierced and formed into a hollow pipe without a longitudinal weld seam. Welded pipe is manufactured by forming stainless steel strip, sheet or plate and joining the edges through welding.

Seamless construction alone does not determine the pressure capability of a pipe. The appropriate pipe type should be selected according to the required pressure, operating temperature, pipe dimensions, applicable product specification, design code, fluid service and project requirements.

SS 304 seamless pipe is commonly supplied to specifications such as ASTM A312 / ASME SA312, while the dimensions of stainless steel pipe may be specified according to ASME B36.19M. Welded pipe may also be acceptable when permitted by the applicable product specification and engineering design. ASME B36.19M covers dimensions for welded and seamless wrought stainless steel pipe.

Stainless Steel 304 Seamless Pipes are widely used in fluid handling, process systems and industrial fabrication because of their corrosion resistance, strength and durability.

Kamal Steels supplies Stainless Steel 304 Seamless Pipes to a wide range of industries requiring corrosion-resistant piping solutions for process, utility and structural applications.