Stainless steel 304 seamless pipes, also called 18/8 stainless steel pipes, are pipes made from AISI 304 stainless steel that don't have any welds or seams. They are strong and resistant to corrosion, which makes them suitable for moving fluids in industries like food and oil.
Stainless Steel 304 Seamless Pipes Manufacturer
Stainless Steel 304 Seamless Pipe is an austenitic chromium-nickel grade manufactured by Zhejiang Xintongda Special Steel Manufacturing Co., Ltd. (XTD). Globally recognised under the UNS S30400 and EN 1.4301 classifications, this material relies on ASTM A312 TP304 as its manufacturing benchmark. It contains approximately 18% chromium and 8% nickel, giving it good general corrosion resistance across a wide range of service environments. Often referred to as 18/8 stainless steel, the grade also provides a combination of strength, toughness, formability, and weldability suited to general industrial applications. SS 304 pipe can be fabricated using common welding methods, with or without filler metal depending on the joint design and fabrication requirements. 304 SS pipe is widely used in food processing, chemical processing, and general industrial piping systems where good corrosion resistance and practical mechanical performance are required. Customised to your exact project specifications, 304 stainless steel pipe is provided by XTD in a selection of outer diameters, wall thicknesses, and lengths, alongside necessary material documentation and traceability.
Our Seamless 1.4301 pipe meets the following specifications:
-
Standard ASTM A312 -
OD Range 6-1016 mm -
Thickness 1-65 mm -
Length ≤ 18 m
Get a free quote now
Technical Data
Technical Data
How do we Produce 304 Stainless Steel Pipes in Our China Factory?
We start by heating a high-quality round steel billet in a furnace. Then, we use a piercing machine to create a hollow shell. This is followed by cold drawing or rolling to achieve the precise size. Finally, we perform solution annealing and pickling to ensure a smooth finish on every pipe. Visit our manufacturing page to learn about our detailed production process for 304 SS Seamless Pipe.
Features of Stainless Steel 304 Seamless pipes
AISI 304 stainless steel pipe has 6 important characteristics:
- Corrosion Resistance: This SS 304 pipe resists rust and oxidation because it contains a high amount of chromium, which forms a protective layer of chromium oxide. This protective layer keeps the pipe durable even when it is exposed to water or harsh chemicals.
- Mechanical Strength: Our stainless steel 304 pipe offers high tensile strength and toughness due to the alloy's balanced composition. It enables the pipes to handle heavy pressure without breaking.
- Temperature Performance: Seamless 1.4301 pipe maintains its structural integrity in both freezing-cold and high-heat environments. It performs well as the material does not become brittle at low temperatures or lose shape under heat.
- Smooth Interior Surface: Each stainless steel seamless 304 pipe unit features a smooth internal surface that prevents sediment buildup. This smooth surface exists to ensure a steady flow of liquids and to make cleaning much easier.
- Formability & Weldability: This seamless stainless steel TP304 pipe is easy to bend, cut, and join. This flexibility is because the balanced austenitic structure supports excellent weld integrity without the risk of cracking during the fabrication process.
- Hygienic Properties: The pipe is non-porous and does not harbour bacteria. This makes it very safe for sensitive uses. This hygienic nature exists as the metal does not react with food or medical products.
What is the Equivalent for 304 Stainless Steel?
The equivalent designation of the 304 pipe is UNS S30400. Its other global equivalents include BS 304S31 and Werkstoff Nr. 1.4301. More global equivalents are explained in the table below.
| GRADE | UNS | GB | JIS | ISO | DIN/EN | GOST | |
| ISC | NEW | ||||||
| 304 | S30400 | S30408 | 06Cr19Ni10 | SUS304 | X5CrNi18-10 | 1.4301 | 08X18H10 |
100% Certified Testing & Documentation
- EN 10204 3.1 and EN 10204 3.2 Material Test Certificates (MTC)
- Raw Materials Certificate
- 100% PMI
- Heat Treatment Charts
- Third-Party Inspection Report
- Surface roughness and size measurement
- Manufacturer Test Certificate (Impact Testing, Flattening, Flare, Bend, Hardness, Intergranular, Pitting Corrosion, Grain size, ET, UT, HT)
- Laboratory Test Certificate from the Government-Approved Lab
What Industries Use Stainless Steel 304 Pipe?
304 SS pipe is used in 7 demanding industries:
Food & Beverage Processing
TP304 pipe is used to transport milk, juices, and beer through processing machines. It is chosen as it does not change the taste or safety of the food products.
Pharmaceutical Industry
The seamless stainless steel TP304 pipe is used in cleanrooms and labs to move liquid medicines and chemicals. Its sterile surface ensures that there is no contamination during the drug manufacturing process.
Chemical Manufacturing
SS 304 pipe is used to move mild acids and various chemicals through the plant. It is ideal here because it does not corrode easily when in contact with industrial fluids.
Automotive Structures
The pipe is used for exhaust systems and structural components in cars. It is used because it can withstand heat and prevent rust caused by road salt and moisture.
Aerospace and Aviation
ASME SA312 304 stainless steel pipe is used for fuel lines in ground equipment and hydraulic lines in test rigs.
Construction and Architecture
The 304 pipe is used for handrails, supports, and decorative structures in modern buildings. It is used because it looks professional and stays shiny without needing constant maintenance.
Oil and Gas Industry
Seamless TP304 pipe is used for low-pressure lines and cooling systems in refineries. It provides a reliable way to transport fluids in environments where carbon steel might rust too quickly.
Frequently Asked Questions
-
What are stainless steel 304 seamless pipes?
-
What is the difference between 304 and 316 stainless steel pipes?The difference between 304 and 316 stainless steel pipes is that 304 pipes have 18-20% chromium and 8-11% nickel for general corrosion resistance. 316 pipes add 2-3% molybdenum for better resistance to chlorides and acids in marine or chemical use.
-
Can Xintongda Deliver Stainless Steel Pipe - 304 Internationally?Yes. We, XTD, are a global supplier of 304 Stainless steel pipe and can deliver these pipes internationally.
-
What Other Stainless Steel Products Can I Buy At Xintongda?You can buy stainless steel seamless pipes in grades 310, 310S, 310MoLN, 314, 316, 317, and 321 from us.
-
What is the composition of the SS 304 seamless pipe?The composition of the SS 304 seamless pipe includes 18-20% chromium, 8-11% nickel, up to 2% manganese, 0.08% max carbon and iron balance.
-
What is 304 stainless steel pipe used for?304 stainless steel pipe is used for the food and beverage industry, pharmaceutical, chemical processing, construction & architecture, and oil & gas industry.