SS 304 Seamless Pipes are produced using high-quality SS billets using a seamless process that maintains constant strength, smooth finish, and a high level of dimensional accuracy. Metinox Overseas is a reputable manufacturer, supplier, and exporter that provides high quality SS 304 Seamless pipes that are manufactured to fit high-demand industrial applications. SS 304 is an austenitic alloy that has chromium and nickel, which has good resistance to corrosion, durability, and stability at varying temperatures. These pipes are highly formable and weldable and are used in complex piping systems without involving high costs, and are able to be used in hostile environments at long service life and constant performance.
The Seamless SS 304 pipes are mostly used in the oil and gas, chemical processing, petrochemicals, food and beverage, pharmaceutical, and power generation and water treatment industries. It is also smooth on its internal surface, which enables a free flow of fluids and reduces the possibility of contamination, which is vital to hygienic and precision-driven processes. The efficiency of those pipes in low temperatures as well as their retention of strength at a comparatively high temperature, is also possible. They provide stable resistance against oxidation and mild corrosive media, which guarantees reliable functioning in either indoor or outdoor applications. All the pipes are fabricated and evaluated according to the international standards to confirm the mechanical properties, both the dimensions and surface quality. When it comes to packaging, it is done in proper ways so that the product is not damaged in any way during the handling and transportation processes, and it can be delivered safely and can be used immediately in the field of industry.
Table of Contents
- ASTM A312 TP304 Seamless Pipe Material Specification
- ASME SA312 SS 304 Round Pipe Chemical Structure
- Schedule 10 304 Stainless Steel Pipe Properties Table
- SS 304 Erw Tube Size Chart
- Equivalent Grades of Stainless Steel DIN 1.4307 Clad Pipe
- Different Types of SS 304 Seamless Pipes
- Surface Finish of Stainless Steel 304 Seamless Pipe
- Tolerance Level of SS 304 Seamless Pipe
- Material Testing & Quality Control
- Advantages of SS 304 Seamless Pipe
- Applications of SS 304 Seamless Pipes
- Why Choose Our SS 304 Seamless Pipes
- Other types of 304 Seamless Pipes
- Supplier and Exporter of 304 Seamless Pipes in Cities
- Supplier and Exporter of 304 Seamless Pipes in Countries
- Frequently Asked Questions (FAQ)
ASTM A312 TP304 Seamless Pipe Material Specification
| Feature | Details |
| Specifications | ASTM A 312, ASME SA 312 / ASTM A 358, ASME SA 358 |
| Dimensions | ASTM, ASME, and API |
| SS 304 Pipes (Seamless) | 1/2? NB � 16? NB |
| ERW 304 Pipes | 1/2? NB � 24? NB |
| EFW 304 Pipes | 6? NB � 100? NB |
| Size Range | 1/8? NB TO 30? NB |
| Specialization | Large Diameter Sizes |
| Schedules | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH120, SCH140, SCH160, XXS |
| Type | Seamless / ERW / Welded / Fabricated / LSAW Pipes |
| Form | Round, Square, Rectangular, Hydraulic, etc. |
| Length | Single Random, Double Random & Cut Length |
| End Finish | Plain End, Beveled End, Threaded |
ASME SA312 SS 304 Round Pipe Chemical Composition
| Grade | Requirement | C (Carbon) | Ni (Nickel) | Si (Silicon) | N (Nitrogen) | Mn (Manganese) | P (Phosphorus) | Cr (Chromium) | S (Sulphur) |
| SS 304 | Min. | � | 8.0 | � | � | � | � | 18.0 | � |
| Max. | 0.08 | 10.5 | 0.75 | 0.10 | 2.0 | 0.045 | 20.0 | 0.030 |
Schedule 10 304 Stainless Steel Pipe Physical Properties
| Grade | Tensile Strength (MPa) | Yield Strength 0.2% Proof (MPa) | Elongation (% in 50mm) | Hardness (Rockwell B) | Hardness (Brinell) |
| Requirement | Min. | Min. | Min. | Max. | Max. |
| SS 304 | 515 | 205 | 40 | 92 HRB | 201 HB |
SS 304 Erw Tube Size Chart
| OD (mm) | WT (mm) | Pipe Size (in) | Schedule (Sch) | Weight (Kg/m) |
| 13.72 | 1.65 | 1/4 | 10S | 0.50 |
| 13.72 | 2.24 | 1/4 | 40S | 0.64 |
| 13.72 | 3.02 | 1/4 | 80S | 0.81 |
| 17.15 | 1.65 | 3/8 | 10S | 0.64 |
| 17.15 | 2.31 | 3/8 | 40S | 0.86 |
| 17.15 | 3.20 | 3/8 | 80S | 1.12 |
| 21.34 | 2.11 | 1/2 | 10S | 1.02 |
| 21.34 | 2.77 | 1/2 | 40S | 1.29 |
| 21.34 | 3.73 | 1/2 | 80S | 1.65 |
| 26.67 | 2.11 | 3/4 | 10S | 1.30 |
| 26.67 | 2.87 | 3/4 | 40S | 1.71 |
| 26.67 | 3.91 | 3/4 | 80S | 2.23 |
| 33.40 | 2.77 | 1 | 10S | 2.13 |
| 33.40 | 3.38 | 1 | 40S | 2.54 |
| 33.40 | 4.55 | 1 | 80S | 3.29 |
| 33.40 | 6.35 | 1 | 160 | 4.30 |
| 42.16 | 2.77 | 1 1/4 | 10S | 2.73 |
| 42.16 | 3.56 | 1 1/4 | 40S | 3.44 |
| 42.16 | 4.85 | 1 1/4 | 80S | 4.53 |
| 42.16 | 6.35 | 1 1/4 | 160 | 5.69 |
| 48.26 | 2.77 | 1 1/2 | 10S | 3.16 |
| 48.26 | 3.68 | 1 1/2 | 40S | 4.11 |
| 48.26 | 5.08 | 1 1/2 | 80S | 5.49 |
| 60.33 | 2.77 | 2 | 10S | 3.99 |
| 60.33 | 3.91 | 2 | 40S | 5.52 |
| 60.33 | 5.54 | 2 | 80S | 7.60 |
| 60.33 | 8.74 | 2 | 160 | 11.29 |
| 73.03 | 3.05 | 2 1/2 | 10S | 5.35 |
| 73.03 | 5.16 | 2 1/2 | 40S | 8.77 |
| 73.03 | 7.01 | 2 1/2 | 80S | 11.59 |
| 88.90 | 3.05 | 3 | 10S | 6.56 |
| 88.90 | 5.49 | 3 | 40S | 11.47 |
| 88.90 | 7.62 | 3 | 80S | 15.51 |
| 88.90 | 11.13 | 3 | 160 | 21.67 |
| 101.60 | 3.05 | 3 1/2 | 10S | 7.53 |
| 101.60 | 5.74 | 3 1/2 | 40S | 13.78 |
| 101.60 | 8.08 | 3 1/2 | 80S | 18.92 |
| 114.30 | 3.05 | 4 | 10S | 8.50 |
| 114.30 | 6.02 | 4 | 40S | 16.32 |
| 114.30 | 8.56 | 4 | 80S | 22.67 |
| 114.30 | 13.49 | 4 | 160 | 34.05 |
| 141.30 | 6.55 | 5 | 40S | 22.10 |
| 141.30 | 9.53 | 5 | 80S | 31.44 |
| 141.30 | 15.88 | 5 | 160 | 49.87 |
| 168.28 | 3.46 | 6 | 10S | 14.04 |
| 168.28 | 7.11 | 6 | 40S | 28.69 |
| 168.28 | 10.97 | 6 | 80S | 43.21 |
| 168.28 | 14.27 | 6 | 120 | 54.75 |
| 168.28 | 18.26 | 6 | 160 | 68.59 |
| 219.08 | 8.18 | 8 | 40S | 43.20 |
| 219.08 | 12.78 | 8 | 80S | 65.63 |
| 219.08 | 18.23 | 8 | 120 | 91.30 |
| 219.08 | 23.01 | 8 | 160 | 112.97 |
Equivalent Grades of Stainless Steel DIN 1.4307 Clad Pipe
| Grade | UNS | Werkstoff NR. | AFNOR | EN | JIS | BS | GOST |
| SS 304 | S30400 | 1.4301 | Z7CN18-09 | X5CrNi18-10 | SUS 304 | 304S31 | 08?18?10 |
Different Types of SS 304 Seamless Pipes
8 Inch Seamless 304 Stainless Steel Pipe
10MM 304 Stainless Steel Round Pipe
20mm Diameter Chrome Plated Stainless Steel Pipe 304
304 Stainless Steel Seamless Bare Pipe
ASTM A213 TP304 Seamless Pipe, OD 26.7 MM, 1.2 MM
ASTM A213 TP304 Steel Pipe, SCH 105, PE
ASTM A312 TP304H Pipe, SCH 40S, 10 Inch
ASTM A358 TP304H ERW Pipe, BE, 16 � 1/2 Inch
Seamless Stainless Steel Pipe, ASTM A312 TP304
SS 304 Pipe, ERW, Square
SS ERW Pipe, ASTM A312 TP304, SCH 105, 8 Inch
Surface Finish of Stainless Steel 304 Seamless Pipe
| Surface Finish | ID Roughness (Ra) � inch | ID Roughness (Ra) �m | OD Roughness (Ra) � inch | OD Roughness (Ra) �m |
| AP (Annealed & Pickled) | Not defined | Not defined | 40 or Not defined | 1.0 or Not defined |
| BA (Bright Annealed) | 40, 32, 25, 20 | 1.0, 0.8, 0.6, 0.5 | 32 | 0.8 |
| MP (Mechanical Polish) | 40, 32, 25, 20 | 1.0, 0.8, 0.6, 0.5 | 32 | 0.8 |
| EP (Electro Polish) | 15, 10, 7, 5 | 0.38, 0.25, 0.20, 0.13 | 32 | 0.8 |
Tolerance Level of SS 304 Seamless Pipe
| Stainless Steel 304 Pipe OD Range | ASTM A312 TP304 Pipe Tolerance |
| 4 mm to 35 mm | � 0.08 mm |
| 35 mm to 38 mm | � 0.15 mm |
| 38 mm to 60 mm | � 0.20 mm |
| 60 mm and above | � 0.25 mm |
Material Testing & Quality Control
In Metinox Overseas, we make use of strict and accurate quality tests in all SS 304 Seamless Pipes to achieve uniform performance, safety, and extended life in strenuous industrial works. These are the major quality tests that are done on each batch prior to dispatch.
Positive Material Identification Tests (PMI) Testing
PMI testing is done to ensure the precise chemical composition of the material. It will guarantee complete adherence to SS 304 / UNS S30400 requirements and remove the possibility of not matching the material grade.
Hydrostatic Pressure Testing
All the pipes are tested in a controlled environment (pressure) to ensure that they can hold internal pressure without leakage. The test is used to guarantee the safety of high-pressure piping systems.
Eddy Current Testing
Eddy current testing is carried out as a non-destructive test to determine surface and subsurface faults. It assists in maintaining structural integrity and even quality along the length of the pipes.
Dimensional Inspection/Visual Inspection
Pipes are checked in terms of outer diameter, wall thickness, length, straightness and finish. This will make the product meet the ASTM A312 tolerances and customer requirements.
Third-Party Inspection (T�V / BV / SGS)
Third-party inspection is also offered on demand to confirm the correctness of the product quality and standards. The pipes are also certified by agencies like TUV, Bureau Veritas, or SGS to be used as an export or in any project.
Documentation and Mill Test Certificate (MTC)
Mill Test Certificates are released in terms of EN 10204 3.1 together with each product. These certificates guarantee full traceability of raw materials sourcing to the supply of the finished products.
Advantages of SS 304 Seamless Pipe
SS 304 seamless pipes offer many key advantages, and some of the most common benefits are highlighted below:
High Corrosion Resistance:
The SS 304 seamless pipes are highly resistant to the atmospheric, chemical and mildly corrosive
environment, and they are best suited for industrial piping systems, fluid transportation systems
and corrosive applications. They are durable and can work long-term even when operating in harsh
environments.
High Strength and Durability:
The smooth flow of the manufacturing process improves the hoop and tensile strength over welded
pipes. The net effect is high internal pressure, mechanical stress, and challenging operational
conditions, which are able to be supported by pipes without loss of integrity.
Superior Surface Finish:
SS 304 seamless pipes come in different finishes such as Annealed & Pickled (AP), Bright Annealed
(BA), Mechanical Polished (MP) and Electropolished (EP) surface finishes. These finishes are not
only more aesthetically pleasing but also corrosion-resistant and cleaner to very delicate
industrial uses.
No Weld Defects:
Removing longitudinal welds, seamless pipes eliminate the threat of any defects and failures due to
welds, and provide reliability in high-pressure and critical systems.
Extremely broad Temperature Range:
SS 304 Seamless pipes made of a stable austenitic structure that enables them to perform with
reliability in a wide temperature range, including cryogenic temperature down to moderately
high-temperature systems, and hence are useful in a variety of industries.
Applications of SS 304 Seamless Pipes
SS 304 seamless pipes are very common in different types of industries because they are resistant to corrosion, strong, and durable. The following are some of the main sectors:
Oil & Gas Industry
Deal with pressure lines, gas distribution systems and offshore piping services, they are able to resist harsh conditions and offer durability.
Chemical Plants & Petrochemical Plants
SS 304 smooth pipes are used in aggressive chemicals and in process fluids that are processed with low maintenance, hence are safe and efficient in operation.
Food & Beverage Processing
Their smooth inner part does not allow any contamination and therefore they are good in carrying non-hygienic fluids in breweries, dairies and beverage plants.
Pharmaceutical, Biotechnology
These pipes have applications in the clean steam lines, WFI (Water for Injection) and other process utilities, necessary standards of purity and good internal finishes are maintained.
Construction & Architecture
They provide architectural piping, railings and other visible installations with a perfect look and durability.
Water Treatment & Utilities
SS 304 seamless pipes are resistant to corrosion and wear, and are commonly employed in the use of potable water systems, industrial water, and utility pipelines, which have a long lifespan.
Why Choose Metinox Overseas for SS 304 Seamless Pipes?
Metinox Overseas is the best manufacturer and supplier of SS 304 Seamless Pipe due to some reasons that are given below.
- Certified Quality: Manufactured as per ASTM A312 with Mill Test Certificates (MTC) & inspection reports.
- Wide Inventory: Ready stock of sizes, schedules, and finishes for faster dispatch.
- Custom Solutions: Tailored lengths, thicknesses, and finishes to fit your project.
- Global Supply: Export capability to USA, Europe, Middle East, Asia, and Africa.
Looking for High-Quality SS 304 Seamless Pipes?
Choose Metinox Overseas � Your Reliable SS 304 Seamless Pipe Manufacturer & Exporter.
Let us support your projects with quality, precision, and performance.
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Supplier and Exporter of 304 Seamless Pipes in Cities
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Supplier and Exporter of 304 Seamless Pipes in Countries
Belgium, Switzerland, Afghanistan, Nigeria, Gabon, Israel, Mexico, Slovakia, Qatar, Namibia, Argentina, Nigeria, Mongolia, Tibet, Algeria, Thailand, Iraq, Macau, Brazil, Norway, Yemen, Trinidad & Tobago, Greece, Denmark, Estonia, Spain, Russia, Puerto Rico, Bahrain, Sweden, Turkey, Taiwan, Jordan, Singapore, Zimbabwe, Ecuador, Bulgaria, Costa Rica, South Korea, Morocco, Ireland, France, Chile, Angola, Tunisia, Bolivia, Bangladesh, Kenya, Belarus, Saudi Arabia, Iran, Peru, Indonesia, Philippines, Hungary, Italy, Pakistan, Kazakhstan, Lebanon, Colombia, South Africa, Chile, Japan, Serbia, Malaysia, Romania, Azerbaijan, Vietnam, United States, India, Czech Republic, Germany, Iran, Venezuela, New Zealand, Ukraine, China, Kuwait, Sri Lanka, Australia, Libya, Poland, Bhutan, Oman, Canada, Egypt, United Arab Emirates, Lithuania, Portugal, Austria, Nepal, Poland, Finland, Ghana, United Kingdom, Netherlands, Gambia, Croatia, Hong Kong, Mexico.
Frequently Asked Questions (FAQ)
A: A pipe produced from a billet without any weld seam, providing enhanced pressure resistance and structural integrity.
A: The most used grade of SS 304 Seamless Pipes is ASTM A312 / ASME SA312 and related international equivalents.
A: They are commonly used in Oil & gas, petrochemical, food & beverage, pharmaceutical, water treatment, and architecture.
A: SS 316 has higher corrosion resistance due to added molybdenum, making it better for marine or chloride-rich environments; SS 304 is more cost-effective for general use.
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