
Stainless Steel Seamless pipe Material | 201 304 316 321 317 347 309 310S 2205 2507 410 420 409 430 446 436 904L |
Tube Standards | ASTM A213, ASTM A249, ASTM A269, ASME SA213, ASME SA249, ASME SA269, EN 10216-5 TC1 / TC2, PED 97/23/EC, AD 2000, NACE MR0175/ISO 15156 |
Stainless Steel Seamless Pipes & Tubes Manufacturing Specifications | ASME B36.19 |
ASTM A213 | |
ASTM A312 | |
ASTM A269 | |
ASTM A632 | |
ASME SA213 | |
NFA 49-117 | |
BS 10216 | |
Or as per customer specifications | |
Seamless Tube Size | 3.35 mm OD To 101.6 mm OD |
Welded Tube Size | 6.35 mm OD To 152 mm OD |
Stainless Steel Seamless Tube Swg & Bwg | 10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg. |
ERW Pipe Wall thickness | 0.020″ -0.220″, (special wall thicknesses available) |
Pipe Length | Single Random, Double Random, Standard & Cut length |
Rectangular Welded Pipes Finish | Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF |
AMS 5573 Tube Form | Straight, Coiled, Seamless, Round Pipes/ Tubes, Square Pipes/ Tubes, Rectangular Pipe/ Tubes, Coiled Tubes, "U" Shape, Pan Cake Coils, Hydraulic Tubes, Straight or 'U' bent Tubes, Hollow, LSAW Tubes Etc. |
Square Pipes Type | Seamless, ERW, EFW, Welded, Fabricated |
Pipe Schedule | SCH5, SCH10, SCH10S, SCH20, SCH30, SCH40, SCH40S, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
Stainless Steel Tube Electropolished | (EP) Electropolished for Ultra High Purity Systems |
Pipe Non-Electropolished | (BA) Bright Annealed or (AP) Annealed & Pickled for High-Purity, (CFOS) Cleaned for Oxygen Grade Service or Corrosive Systems |
Stainless Steel Seamless Tube & Pipe I.D. Surface Finish Options | 5, 7 & 10 µin. Ra |
Rectangular tubing JIS | 8A to 250A |
Tube Tolerances | In accordance with: ASTM: A269 & A632, JIS: G 3459 |
stainless steel tubing End | Plain End, Beveled End, Treaded, Ends are suitable for orbital welding |
Tube Marking | Stainless Steel tubes are marked as follows: Standard, Grade, OD, Thickness, Length, Heat No. (Or according to the customer's request.) |
stainless steel tubing Application | Oil Tube, Gas Tube, Fluid Tube, Boiler and Heatexchanger |
welded round tubes Value Added Service | Draw & Expansion as per required Size & Length, Polish (Electro & Commercial) Annealed & Pickled Bending, Machining Etc. |
Seamless/ welded tube Specialize in | Stainless Steel Capillary Tube & Other Odd Size |
Stainless Steel Heat Exchanger & Condenser Tubes | |
Stainless Steel Hydraulic tubing with OD up to 50.8 mm (2.0 in.) are delivered in bright annealed condition | |
Stainless Steel hydraulic tube with OD larger than 50.8 mm are supplied in the annealed and pickled condition, Or in polished condition | |
welded square tubes Marking & Traceability | Each Stainless Steel Tubing is traceable to its producing mill and heat by an identification number etched within 24″ (610mm) of one end. |
stainless steel tubing Test Certificate | Manufacturer Test Certificate according to EN 10204 3.1 B |
Laboratory Test Certificate from Govt. Approved Lab. | |
Under Third Party Inspection | |
stainless steel tubing Testing & Inspection | Visual inspection • Surface roughness measurement • Helium-leak testing • Scanning Electron Microscopy (SEM) • Auger Electron Microscopy (AES) • Election Spectroscopy for Chemical Analysis (ESCA or XPS) • Particle testing • Moisture testing |




Seamless Tubing
Our tubular products are meticulously drawn from tube hollows, created either through billet piercing or an advanced hot extrusion process. Seamless designs excel in scenarios requiring heavy diameter-to-wall ratios, delivering exceptional outside dimensional tolerances.
Advantages of Daxun
- Varieties: From petite to colossal, our extensive range of stainless steel pipes, including premium grades like 304L and 316L, meets diverse industry demands with precision.
- Flexibility: Whether seamless or welded, our steel pipe solutions are tailored to match your project-specific requirements, ensuring optimal performance.
- Quality Standards: Our stainless steel pipes are manufactured in strict adherence to rigorous standards such as ISO9001, ABS, NSF/ANSI Standard 61, and NACE MR0175, guaranteeing unmatched reliability and performance.
- Custom Orders: Need unique dimensions? We offer a wide array of stainless steel pipe customization options at competitive prices, with the convenience of online ordering.


Uncompromising Quality, Timely Delivery, Thorough Inspection
- Daxun's comprehensive quality assurance tests include flattening, pitting, resistance, mechanical, hardness, material positive identification, and expansion tests. These stringent evaluations ensure our materials meet their intended application standards.
- Throughout our meticulous production process, we ensure precision by rigorously measuring the diameter, thickness, and surface quality of each product. Our standard delivery time is reliably set between 7-15 days. For special-sized products, the delivery time may extend to 20 days to maintain our highest quality standards.
We pride ourselves on adhering strictly to contract deadlines, guaranteeing timely delivery as promised. - We welcome and fully support customer third-party agencies conducting thorough inspections at our factory.
- We offer free samples to our customers, facilitating comprehensive testing and evaluation.
- We provide full support for on-site or video inspections of our factory, ensuring transparency and stringent quality control.



Unrivaled Capabilities in Stainless Steel Pipe Manufacturing at Daxun
Our forming capabilities are unmatched, featuring state-of-the-art extrusion and cold working technologies for tube and pipe production. We also house one of the world's largest pilger mills and unique hydroforming processes for manufacturing superior fittings.
Pioneering Pipe Processing Capabilities at Daxun
As a vertically integrated manufacturer, Daxun provides a comprehensive one-stop-shop solution capable of handling entire projects or specific machining tasks. Our advanced services include straightening, drilling, honing, trepanning, cutting, testing, boring, machining, laser welding, polishing, turning, and other specialized services.


Superior and Enhanced Pipe Solutions
Equipped with vertical and horizontal presses ranging from 12,000 tons to 35,000 tons, Daxun boasts the world's most comprehensive pipe extrusion capabilities. This enables us to produce the longest lengths and largest diameter pipes in the industry.
Daxun is a key supplier to the power generation market, providing a wide range of products including ductwork, boiler tubes, main steam tubes, thermal reheat tubes, and flue gas desulfurization units, catering to nuclear, coal-fired, renewable energy, and combined cycle applications.






- Daxun: The Apex of Stainless Steel Pipe Manufacturing
- Versatile Pipe Solutions: Large and Small Diameters, Straight or Rolled Tubes
- Comprehensive Range: Welded, Drawn, or Seamless Tubes and Pipes


At Daxun, quality is our hallmark. Our state-of-the-art testing laboratory and equipment ensure all stainless steel materials meet the highest standards of actual weight and quality before shipment. Our rigorous quality control team conducts 100% inspection at every stage of production, guaranteeing the finest products for our customers.
Our commitment to excellence extends beyond the initial transaction. Even after your order is delivered, Daxun continues to offer unparalleled after-sales services. We are dedicated to providing ongoing support and warranty, ensuring your complete satisfaction.
- Precision Standards: ASTM A312 Tolerances
ASTM A312 | ||
NPS Designator | Tolerance, % from Nominal | |
Over | Under | |
⅛ to 2½ incl., all t/D ratios | 20 | 12.5 |
3 to 18 incl., t/D up to 5% incl. | 22.5 | 12.5 |
3 to 18 incl., t/D > 5% | 15 | 12.5 |
20 and larger, welded, all t/D ratios | 17.5 | 12.5 |
20 and larger, seamless, t/D up to 5% incl. | 22.5 | 12.5 |
20 and larger, seamless, t/D > 5% | 15 | 12.5 |
- Precision Standards: ASTM A269 Tolerances
ASTM A269 | ||||||
Group | Size, Outside Diameter, in. | Permissible Variations in Outside Diameter, in. (mm) | Permissible Variations in Wall Thickness, % | Permissible Variations in Cut Length, in. (mm) | Thin Walled Tubes | |
Over | Under | |||||
1 | Up to ½ | ±0.005(0.13) | ±15 | ⅛(3.2) | 0 | … |
2 | ½ to 1½, excl | ±0.005(0.13) | ±10 | ⅛(3.2) | 0 | less than 0.065 in. (1.65 mm) nominal |
3 | 1½ to 3½, excl | ±0.010(0.25) | ±10 | 3/16(4.8) | 0 | less than 0.095 in. (2.41 mm) nominal |
4 | 3½ to 5½, excl | ±0.015(0.38) | ±10 | 3/16(4.8) | 0 | less than 0.150 in. (3.81 mm) nominal |
5 | 5½ to 8, excl | ±0.030(0.76) | ±10 | 3/16(4.8) | 0 | less than 0.150 in. (3.81 mm) nominal |
6 | 8 to 12, excl | ±0.040(1.01) | ±10 | 3/16(4.8) | 0 | less than 0.200 in. (5.08 mm) nominal |
7 | 12 to 14, excl | ±0.050(1.26) | ±10 | 3/16(4.8) | 0 | less than 0.220 in. (5.59 mm) nominal |





A: We proudly offer a vast selection of superior steel types, including 310S, 316L, 304, 304L, 201, 904L, 316H, 316, and the 316L 300 series.
Additionally, we excel in producing 400 series and duplex stainless steels such as 2205, 2304, 2101, 2507, and more. Our high-nickel alloys, including 904L, 800H, and 600H, are second to none.
Q2. Can you produce the products according to my own drawings?
Absolutely! We are equipped to manufacture products precisely as per your detailed drawings, ensuring your complete satisfaction.
Q3. How does your factory do regarding quality control?
Quality is our utmost priority. We adhere to rigorous quality control measures from inception to completion.
Q4. Can I request to change the form of packaging and transportation?
Certainly, we can tailor the packaging and transportation methods to suit your specific requirements,
though additional costs and price differences may apply during this customization.
Q5. How does your factory do regarding quality control?
Quality is our utmost priority. We adhere to rigorous quality control measures from inception to completion.
Q6. How long is the delivery time?
A: Typically, our delivery time ranges from 7 to 20 working days post-payment confirmation.
For urgent requirements, we offer expedited processing to meet your needs promptly.
Q7. What is your Payment?
A: For small orders, we accept 100% T/T in advance or Western Union.
B: For larger orders, a 30% T/T deposit is required upfront, with the remaining 70% due before shipment.
C: For substantial orders, we accept 100% Irrevocable LC at sight.
Q8: Can you make DDQ (Deep Drawing Quality)?
A: Yes, we can. Our materials are engineered for deep drawing applications such as stainless steel pots, sinks, and bowls. Share your specific needs, and we will tailor the mechanical properties accordingly.
Q9: How to get a sample?
A: FREE samples are available for your evaluation and testing. For small pieces, we might even cover the courier costs, depending on the scenario.
Q10: Which countries have you exported to?
A: We take pride in exporting our stainless steel materials to countries worldwide, including Vietnam, Thailand, Turkey, Russia, Morocco, Korea, India, Pakistan, UAE, Ukraine, and many more.
Q11: How can I visit your company?
A: You can conveniently fly to Guangzhou Baiyun International Airport, and we will arrange for your pick-up from there.