
Stainless Steel Welded pipe 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 Welded pipe 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 | |
Welded pipe Tube Size | 3.35 mm OD To 101.6 mm OD |
Welded Tube Size | 6.35 mm OD To 152 mm OD |
Stainless Steel Welded pipe 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, Welded pipe, 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 | Welded pipe, 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 Welded pipe 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. |
Welded pipe/ 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 |




Welded Pipe Tubing Mastery
Our tubular products originate from meticulously drawn tube hollows, created through flawless piercing of a billet or by an advanced hot extrusion process. Welded pipes are exemplary for handling significant diameter-to-wall ratios while delivering exceptional outside dimensional accuracies.
Unmatched Advantages of Daxun
- Diverse Varieties: From the petite to the colossal, our expansive collection of stainless steel pipes, including premium grades like 304L and 316L, fulfills a wide array of needs.
- Unparalleled Flexibility: Whether it's our precision-engineered Welded Pipes or robust welded steel pipes, all our products are crafted to meet your project-specific requirements.
- Stringent Quality Standards: Each stainless steel pipe we offer adheres to rigorous international standards such as ISO9001, ABS, NSF/ANSI Standard 61, and NACE MR0175, ensuring unparalleled reliability and performance.
- Custom Orders: Seeking unique sizes? Our vast array of stainless steel pipe customization options, coupled with competitive pricing and the ease of online ordering, caters to your specific needs.


Uncompromising Quality, Punctual Delivery, Meticulous Inspection
- Daxun's comprehensive suite of quality assurance tests, including flattening, pitting and resistance, mechanical, hardness, material positive identification, and expansion tests, ensures that our materials are impeccably fit for their intended applications.
- Throughout our meticulous production process, we ensure precision by meticulously measuring the diameter, thickness, and surface quality of each product. Our standard delivery time is reliably set between 7-15 days. However, for certain special-sized products, the delivery time may extend to 20 days to guarantee the highest standards of quality.
We pride ourselves on adhering strictly to contract deadlines, ensuring timely delivery as promised. - We welcome and support customer third-party agencies to conduct 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, assuring transparency and absolute quality control.



Unrivaled Capabilities in Stainless Steel Pipe Manufacturing at Daxun
Our forming capabilities are unparalleled, featuring state-of-the-art extrusion and cold working technologies for superior tube and pipe production. We also boast one of the world's largest pilger mills and unique hydroforming processes, ensuring the production of the highest quality fittings.
Pioneering Pipe Processing Capabilities at Daxun
As a vertically integrated manufacturer, Daxun offers a comprehensive one-stop solution, capable of handling entire projects or specific machining tasks. Our 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. These enable us to produce the longest lengths and largest diameter pipes in the industry.
Daxun is a pivotal supplier to the power generation market, providing an extensive range of products such as ductwork, boiler tubes, main steam tubes, thermal reheat tubes, and flue gas desulfurization units for nuclear, coal-fired, renewable energy, and combined cycle applications.






- Jiangsu Daxun Alloy Co., Ltd. stands as the world's preeminent stainless steel pipe manufacturer, synonymous with excellence and innovation.
- We offer an extensive range of pipes, from large to small diameters, meticulously crafted into both straight and rolled tubes.
- Choose from our exceptional collection of welded and drawn tubes, or opt for our precisely engineered welded pipe tubes and tubes.


At Daxun, our advanced testing laboratories and state-of-the-art equipment ensure that every stainless steel material meets the exact weight and superior quality specifications before shipment. Our stringent quality control team conducts comprehensive and 100% inspections throughout all production stages.
Our commitment to excellence extends beyond the point of sale. Even after you've received your orders, Jiangsu Daxun Alloy Co., Ltd. continues to offer superior after-sales support and services. We are dedicated to providing ongoing assistance and honoring warranties for all your orders.
- 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, Welded pipe, t/D up to 5% incl. | 22.5 | 12.5 |
20 and larger, Welded pipe, t/D > 5% | 15 | 12.5 |
- 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 comprehensive array of top-tier general steel types including 310S, 316L, 304, 304L, 201, 904L, 316H, 316, and 316L (300 series).
Additionally, we specialize in high-performance 400 series and duplex stainless steels such as 2205, 2304, 2101, 2507, among others. Our portfolio also encompasses high-nickel alloys like 904L, 800H, and 600H.
Q2. Can you produce the products according to my own drawings?
Absolutely! We excel in manufacturing products with precision based on your detailed drawings, ensuring your utmost satisfaction with the final product.
Q3. How does your factory do regarding quality control?
Quality is our paramount concern. We rigorously adhere to stringent quality control measures throughout each stage of the production process.
Q4. Can I request to change the form of packaging and transportation?
Yes, we offer customized packaging and transportation solutions tailored to your specific requests,
though please be aware that any additional costs and price differences will need to be covered by you.
Q5. How does your factory do regarding quality control?
Quality is our paramount concern. We rigorously adhere to stringent quality control measures throughout each stage of the production process.
Q6. How long is the delivery time?
A: Typically, our delivery time ranges from 7 to 20 working days following payment confirmation.
For urgent orders, we can expedite the process to ensure your needs are prioritized and met promptly.
Q7. What is your Payment?
A: For small orders, we accept 100% T/T in advance or Western Union.
B: For standard orders, we require a 30% T/T upfront and the remaining 70% before shipment.
C: For large orders, we accept 100% Irrevocable LC at sight.
Q8: Can you make DDQ (Deep Drawing Quality)?
A: Yes, indeed. Our materials are expertly crafted to meet the stringent requirements for stainless steel pots, sinks, bowls, and more. Just inform us of your specific needs, and we'll adjust the mechanical properties accordingly.
Q9: How to get a sample?
A: We offer FREE samples for your evaluation and testing. For small pieces, we may even cover the courier costs, depending on the situation.
Q10: Which countries have you exported to?
A: We are proud to have exported our high-quality stainless steel materials to a diverse array of countries including Vietnam, Thailand, Turkey, Russia, Morocco, Korea, India, Pakistan, UAE, Ukraine, and many more.
Q11: How can I visit your company?
A: You may fly to Guangzhou Baiyun International Airport, and we will arrange for your pick-up and transportation to our company.