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Henan TOM Intelligent Technology Co., Ltd. is a dedicated manufacturer of stainless steel pipe and duplex stainless steel pipe (304/L, 316/L, 317L, 321, 310S, duplex 2205 and super duplex 2507) to ASTM A312, A789, A790 and A213. Our integrated mill covers steelmaking, hot piercing, cold drawing, solution annealing and machining under one roof, with annual capacity exceeding 3500000 tons and a size range from 1/2″ to 48″ (seamless to 24″, welded/EFW to 110″). Quality is assured by ISO 9001, PED 2014/68/EU and CE certification, supported by EN 10204 3.1 mill certificates, third-party inspection (SGS/BV/TÜV) and NACE MR0175 / ISO 15156 compliance on request.

Why Choose Stainless Steel 304 Seamless Pipes?

ASTM A312 TP304 stainless steel seamless pipe is an austenitic stainless steel pipe manufactured without a longitudinal weld. TP304, also identified as UNS S30400, is one of the most widely used stainless steel grades for general corrosion-resistant piping and industrial applications.

304 stainless steel seamless pipe combines good corrosion resistance, strength, ductility, formability and weldability. It is commonly supplied for fluid transportation, process piping, heat exchangers, food processing, pharmaceutical equipment, chemical systems, water treatment and general industrial applications.

The pipe can be supplied in different outside diameters, wall thicknesses, schedules and lengths according to applicable standards and project requirements. Inspection options may include chemical analysis, PMI, tensile testing, hardness testing, dimensional inspection, hydrostatic testing and applicable nondestructive testing.

For industrial projects, TP304 seamless pipe can be supplied with material traceability, inspection documentation and seaworthy export packaging according to customer requirements.

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Application And Function Of Stainless Steel 304 Seamless Pipes

Process Piping

304 seamless pipe is used for general industrial process lines and fluid transportation systems where good corrosion resistance and mechanical performance are required.

Food & Beverage

304 stainless steel is widely used in food processing equipment, sanitary piping and fluid handling systems where cleanable stainless steel surfaces are required.

Pharmaceutical Equipment

With suitable surface treatment and cleaning procedures, 304 stainless steel can be used in selected pharmaceutical processing and equipment applications.

Chemical Processing

TP304 can be used for many general chemical service applications where the process medium is compatible with the material.

Water Treatment

304 stainless steel pipe is used in selected water treatment, water transportation and utility systems.

Heat Exchangers

304 stainless steel seamless pipe can be used in heat exchanger and thermal equipment applications subject to the operating temperature and corrosion conditions.

Machinery Manufacturing

The material is widely used for industrial machinery, equipment components and fluid-handling systems.

Construction and Industrial Systems

304 stainless steel pipe can be used in structural, architectural and general industrial systems where corrosion resistance and durability are required.

Application And Function Of Stainless Steel 304 Seamless Pipes

Product Parameters

Item	Details
Product Name	Stainless steel seamless pipes
Standards	Compliant with ASTM, DIN, ISO, EN, JIS, GB and other international or national standards.
Material Grades	200 Series: 201, 201L, 201LN, 202, etc.; 300 Series: 304, 304L, 309S, 310S, 316, 316Ti, 317, 317L, 321, 347, 347H, etc.; 400 Series: 405, 409, 410, 420J1, 420J2, 430, 439, 440, 440C, 443, 444, etc.; Duplex grades like 2205, 2507, etc.
Surface Finish	Options include polished, annealed, pickled, bright, brushed, satin, or mirror finish, according to customer preference.
Type	Available in hot rolled, cold rolled, or cold drawn variants.
Size Range	Outer diameters range from 6mm up to 630mm; wall thickness varies between 0.5mm and 60mm; lengths can be customized or provided in standard sizes such as 5.8m, 6m, 11.8m, or 12m.
Tolerance	Manufactured with dimensional tolerances meeting relevant standards or tailored to specific client requirements, such as ASTM A269, ASTM A312, EN 10216-5, etc.
Mechanical Properties	Mechanical strength, yield properties, and elongation comply with applicable specifications to ensure performance in intended applications.
Chemical Composition	Fulfills chemical requirements for 304 grade stainless steel, typically containing a maximum of 0.08% C, 18.0-20.0% Cr, and 8.0-11.0% Ni, among other elements.
Testing & Inspection	Pipes undergo rigorous quality checks including hydrostatic tests, eddy current inspections, ultrasonic examinations, dimensional verification, and surface quality assessments.
Applications	Widely used for fluid conveyance, heat exchanger tubing, petrochemical installations, food processing machinery, pharmaceutical equipment, boilers, pressure vessels, structural applications, and various industrial uses.
Price Terms	Trade terms offered include FOB, CIF, CFR, CNF, EXW, and other options depending on customer requirements.
Payment Terms	Accepted payment methods include T/T, L/C, D/P, and others as negotiated.
Delivery Time	Timely shipment available for stocked items; delivery schedules for production orders are arranged as per order size and specifics.
Packing	Packed in seaworthy export packaging, including protective plastic film, moisture-resistant materials, wooden crates or pallets, steel strapping, or tailored packing as requested by clients.

304 (UNS S30400) Chemical Composition

Element	Composition
Carbon (C)	≤ 0.08
Manganese (Mn)	≤ 2.00
Silicon (Si)	≤ 1.00
Phosphorus (P)	≤ 0.045
Sulfur (S)	≤ 0.030
Chromium (Cr)	18.0–20.0
Nickel (Ni)	8.0–11.0

304 (UNS S30400) Mechanical Properties

Property	Value
Tensile Strength	≥ 515 MPa (75 ksi)
Yield Strength	≥ 205 MPa (30 ksi)
Elongation	≥ 40%
Hardness	≤ 201 HB / ≤ 92 HRB
Density	≈ 7.93 g/cm³
Melting Point	≈ 1400–1450 °C
PREN	≈ 19

304 Stainless Steel Equivalent Grades

Standard / System	Grade / Designation
ASTM	TP304
UNS	S30400
EN / W.Nr.	1.4301
EN Designation	X5CrNi18-10
AISI	304
Material Family	Austenitic Stainless Steel

304 Stainless Steel Pipe Advantages

Good General Corrosion Resistance

304 stainless steel provides good resistance to atmospheric corrosion, moisture and many common chemical environments, making it suitable for general industrial and process applications.

Seamless Construction

The seamless manufacturing process produces pipe without a longitudinal weld seam, which is useful for applications requiring consistent pipe integrity and reliable pressure performance.

Good Mechanical Properties

TP304 provides a useful combination of tensile strength, yield strength and elongation for industrial piping applications.

Excellent Formability

304 stainless steel can be processed into various pipe sizes and configurations while maintaining good mechanical performance.

Good Weldability

Although this product is supplied as seamless pipe, 304 stainless steel is generally recognized for good welding characteristics when appropriate procedures and filler materials are used.

Hygienic Surface

With appropriate surface treatment and cleaning, 304 stainless steel can be used in food processing, pharmaceutical and other applications where cleanliness is important.

Wide Industrial Availability

304 is widely used across industrial sectors, making standard sizes, fittings and related stainless steel products relatively accessible for many projects.

304 Stainless Steel Pipe Advantages

304 Corrosion Resistance

304 stainless steel obtains its corrosion resistance primarily from its chromium content, which supports the formation of a passive oxide layer on the metal surface.

TP304 is commonly used in atmospheric, water, food-processing and many general chemical environments. However, corrosion resistance depends on the actual service conditions.

Factors that can affect the performance of 304 stainless steel pipe include:

Chloride concentration

Operating temperature

pH value

Chemical concentration

Flow velocity

Surface condition

Crevice conditions

Welding and fabrication conditions

304 stainless steel is not suitable for every corrosive environment. For applications involving high chloride levels, aggressive chemicals or elevated temperatures, alternative grades such as 316L, 317L, 321 or duplex stainless steel may need to be evaluated according to the actual operating conditions.

304 vs 316L Stainless Steel Pipe

Property	304 Stainless Steel	316L Stainless Steel
UNS	S30400	S31603
Main Alloying Elements	Cr, Ni	Cr, Ni, Mo
Molybdenum	Not intentionally alloyed	Approximately 2–3%
General Corrosion Resistance	Good	Generally higher in many aggressive environments
Chloride Resistance	Moderate	Improved compared with 304
Typical Applications	Food, water, general process piping, machinery	Marine, chemical, pharmaceutical and chloride-containing environments
Cost Position	Generally more economical	Generally higher material cost

304 vs 304L Stainless Steel Pipe

Feature	304	304L
UNS	S30400	S30403
Carbon	≤ 0.08%	≤ 0.030%
Chromium	18–20%	18–20%
Nickel	8–11%	8–12%
Weldability	Good	Particularly suitable for many welded applications
Typical Use	General industrial and process applications	Applications where lower carbon is preferred, especially after welding

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Packing and Delivery

304 stainless steel seamless pipes are prepared for transportation according to pipe size, surface condition, destination and customer requirements.

Typical export packaging may include:

Plastic caps for pipe ends

Waterproof plastic film

PVC or protective wrapping

Steel strapping

Wooden cases or pallets

Steel frames for large or heavy pipe

Seaworthy export packaging

For container shipments, pipe bundles can be arranged according to the available container space and loading requirements.

Product identification, heat numbers and package markings can be provided according to customer instructions to support traceability during transportation and receiving.

Packing and Delivery