Stainless steel pipe
Welded Tube
Made from strip that is roll formed and fusion welded along a longitudinal seam. Daxun’s welding process uses no filler metal, keeping the seam consistent with the base material.
Welded & Drawn Tubing
Welded tube redrawn to final size — the way to get heavy wall-to-diameter ratios that can’t be welded directly, at a lower cost than seamless. All Daxun welded and drawn tube is bright annealed.
Seamless Tubing
Drawn from hollows made by piercing a billet or hot extrusion. Best suited for heavy diameter-to-wall ratios and tight outside-diameter tolerances.
Daxun is located in China
| Product Parameters: Stainless Steel Pipe/Tube | |||
| OD | 3mm~2000mm | thickness | 0.3mm~100mm |
| Standard | ASTM A312 A249 A213 A269 A268 etc | ||
| Type | Seamless Tube, Welded Tube, Precision Tube, Polished Tube, Pickled Tube, Hairline Tube, etc. | ||
| shape | Round square rectangle Hexagonal Special-shaped etc | ||
| Grade | 304 304L 304H 309S 310S 316L 316TI 317L 321 347 347H 430 410 410S 420 430 439 441 443
444 904L 2205 2507 S32750 S32760 |
||
Daxun is a China-based manufacturer of precision seamless tube, produced to
standard specifications with tight tolerances, including thin-walled tube.
Materials supplied include stainless steel, titanium alloy, high-strength steel
and nickel-based alloy.
Daxun supplies seamless and welded stainless steel pipe for large-diameter
applications in the power generation, petrochemical, and marine engineering
industries. Specifications and certification requirements are confirmed per
order.
Brands and characteristics of various stainless steel pipes
Our unparalleled resources, technical expertise and highly skilled workforce produce consistently high quality stainless steel pipe
Both stainless steel seamless pipes and stainless steel welded pipes are available in large diameters
Stainless steel polishing tubes are polished or ground to obtain better brightness
Stainless steel pipes are divided into stainless steel seamless pipes and stainless steel welded pipes
316 stainless pipe Austenitic stainless steel is non-magnetic and has high toughness and plasticity
304 stainless pipe Austenitic stainless steel is non-magnetic and has high toughness and
Stainless steel seamless pipes have high precision and uniform wall thickness.
Our stainless steel welded pipes do do not require add any fillers for welding
Achieve the required finish through polishing to make the stainless steel pipe brighter
Manufacturing Methods
Each tube is manufactured to the strictest regulatory and internal specifications. Daxun’s proprietary forming, welding and finishing processes produce pipe and Tube with superilnconelor performance. Some of the stages of manufacturing are randomly listed below.
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Pipe forming -
Annealing
-
cooling straightening
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Polishing
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Polishing
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Testing
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Final Stage
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Packaging for Shipment
Main features of stainless steel pipes
Excellent corrosion resistance in extreme environments
Many types of stainless steel pipe offer very high strength for demanding structural and pressure applications.
Suitable for situations where magnetic field interference is avoided
The ability to withstand very high temperatures makes nickel alloys perfect for onshore, offshore and power generation applications.
Daxun stainless steel pipe manufacturing capabilities
Daxun works with established mills and finishing partners to supply seamless,welded, and welded-and-drawn stainless steel pipe and tube across a widerange of diameters and wall thicknesses, in round, square, rectangular, andspecial-shaped profiles. Surface finishes include mill, pickled, polished,and hairline.Every order is confirmed against the applicable standard — ASTM, EN, JIS, orGB — with dimensions, tolerances, and delivery condition matched to yourproject requirements. A mill test certificate is provided with each shipment.Send your OD, wall thickness, length, grade, and standard, and we’ll confirmfeasibility, pricing, and lead time.
Daxun’s pipe processing capabilities
Daxun’s pipe processing capabilities Beyond supplying raw pipe and tube, Daxun coordinates downstream processing to deliver parts closer to finished condition:Precision machining — straightening, boring, turning, and machining to tighter dimensional tolerances than mill-standard product.Surface and joint work — honing,trepanning, polishing, and laser weldingfor applications requiring specific surface finish or fabricated assemblies.Cutting and testing — cutting to length and non-destructive testing (eddy current, ultrasonic, or per the applicable ASTM standard) beforeshipment.Whether you need a single machining job or processing across a full order,send your drawing or specification and we’ll confirm what’s achievable.
Bigger, Better Pipe Solutions
Large-diameter and heavy-wall pipe brings tighter constraints on roundness,wall uniformity, and weld integrity — especially for welded and welded-and-drawn product. Daxun confirms production method, tolerance class,and testing requirements for each large-diameter project individually,rather than applying a single standard spec across all sizes.Send your OD, wall thickness, length, grade, and standard, and we’ll confirmfeasibility, tolerance, and lead time for your project.
Powerful Pipe Solutions
Daxun supplies the power generation market with ductwork, boiler tubes, main steam tubes, thermal reheat tubes, flue gas desulfurization units and other products for nuclear, coal-fired, renewable energy and combined cycle applications.
Technical Information
Daxun supplies pipe and tubing for demanding mechanical and structural applications, including sour service environments and high-pressure,high-temperature conditions. High-alloy nickel casing and mechanical tubeproducts are available for these applications.
Chemical processing applications include pipe and tube for ethylene production, caustic soda production, and heat exchanger tube. Daxun also supplies tube products for the medical and general industrial sectors, including X-ray equipment, thermocouple sheathing tube for industrial furnaces, and boiler tube.
Actual Weight & Good Quality Daxun maintains an in-house testing laboratory to verify that every shipment meets the specified weight and quality standard before delivery. Our quality control team performs 100% inspection at every production stage.
Our support doesn’t end when your order ships. Daxun continues to provide after-sales assistance and warranty support for every order.
Application cases of stainless steel pipes in different industries
Daxun Stainless has developed R&D and manufacturing technology for N08825 alloy pipes for high-pressure hydrogen applications. The product and various mechanical, physical and chemical properties have reached the international advanced level, meeting the requirements for the use of alloy seamless pipes for high-pressure hydrogen applications, and realizing high-pressure hydrogen applications. The engineering development of alloy seamless pipe products has formed independent intellectual property rights and industrialization capabilities. It meets the pipe requirements for petroleum hydrogenation units, and also meets the needs of special pipes for nuclear power, petrochemical, coal-to-liquids, chemical industry, aerospace and other major equipment and high-end equipment manufacturing.
In thermal power generation, the use of supercritical units and ultra-supercritical units has increased. The supercritical unit improves the thermal efficiency of the unit by increasing the pressure and temperature of the steam in the boiler. Its steam and water pipelines include reheater tubes, superheater tubes, water wall tubes, economizer tubes, air preheating tubes, heat transfer tubes, and downcomers. And various header pipes are exposed to high temperature and high pressure conditions for a long time, so the steel pipes are required to have high lasting strength, high resistance to oxidation and corrosion and good structural stability. Usually, the number of high-pressure boiler tubes such as Super304H and HR3C consumed per million kilowatts of super (super)critical units is about 1,250 tons.
Daxun developed the manufacturing technology of large-diameter super duplex stainless steel seamless pipes, realized the transformation of scientific and technological achievements into high-tech products for marine engineering, and served as a demonstration for the industrialization of key equipment and systems in high-end ship and marine engineering manufacturing.
Daxun joined the ranks of qualified suppliers and developed the core technology of N08367 seamless and welded steel pipe manufacturing for third-generation nuclear power AP1000, achieving major industrialization goals. Reaching the international advanced and leading level, the implementation of the project will effectively promote the independence of the nuclear power industry, meet the development needs of domestic and foreign advanced nuclear power equipment manufacturing, and ensure the safe operation of nuclear power plants.
Focusing on the performance requirements of welded pipes for LNG, Daxun broke through the key technologies of welding and heat treatment during product processing and manufacturing, and developed large-diameter stainless steel welded pipes for LNG with excellent corrosion resistance, low-temperature toughness and good low-temperature strength.
Can be used in fuselage parts, aerospace equipment, rockets, artificial satellites, missiles, spacecraft shells, pipeline systems, etc.
Serving the petrochemical industry for reaction towers, heat exchangers, pressure vessels, distillation towers, valves, pumps, and pipeline systems. Send your specifications for a quote.
Stainless steel pipes are used in the manufacture of ship piping systems, whip antennas, seawater pipes, condensers, heat exchangers, acoustic devices, fire piping, etc.
Deep-sea exploration equipment is one of the important directions in the field of marine engineering, and stainless steel pipes have become an ideal material for various deep-sea exploration equipment due to their corrosion resistance, high strength and other advantages. Deep-sea pipelines, detectors, sonar equipment, etc. can all be made of stainless steel pipes to ensure long-term reliable operation in harsh marine environments.
Serving the pharmaceutical and biopharmaceutical industries has been a welcome challenge for Daxun. From raw material selection to delivery, we have developed high purity and ultra-high purity services to meet and exceed industry standards. When only the best stainless steel tubing and stainless steel pipes can meet the demand, more and more pharmaceutical and biopharmaceutical companies trust Daxun.
Serving the power generation industry with pipe and tube for boiler, turbine, and pipeline applications. Send your specifications for a quote.
Technical Information
- Partial inventory
- ASTM A269 Tolerances
- ASTM A554 Tolerances
- ASTM A312 Tolerances
- Delivery state
| Diam (mm) | Thickness(mm) | Length (mm) | Comment |
| φ3.0-12.0 | 0.3-1.0 | 6000 | AAA |
| φ19.0-22.0 | 0.6-3.0 | 6000 | AAA |
| φ25.0-27.2 | 0.8-10.0 | 6000 | AAA |
| φ32.0-60.3 | 0.8-15.0 | 36000 | AAA |
| φ76.3-102.1 | 0.8-20.0 | 36000 | AAA |
| φ114.3-168.3 | 0.8-20.0 | 6000 | AAA |
| φ180.0-219.2 | 3.0-20.0 | 6000 | AAA |
| φ273.1-325.3 | 4.0-30.0 | 6000 | AAA |
| φ377.2-426.3 | 5.0-30.0 | 6000 | AAA |
| φ508.1-711.0 | 5.0-30.0 | 6000 | AAA |
| 711.0+
|
5.0-30.0
|
6000
|
AAA
If you need to know more about the size, please contact Daxun |
| 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 |
| ASTM A554 | ||||
| OD Size, in. (mm) | Wall Thickness | OD, ± | ||
| in. | mm | in. | mm | |
| Under ½ (12.7) | 0.020 to 0.049 | 0.51 to 1.24 | 0.004 | 0.1 |
| ½ to 1 (12.7 to 25.4) | 0.020 to 0.065 | 0.51 to 1.65 | 0.005 | 0.13 |
| ½ to 1 (12.7 to 25.4) | over 0.065 to 0.134 | over 1.65 to 3.40 | 0.01 | 0.25 |
| Over 1 to 1½ (25.4 to 38.1), incl | 0.025 to 0.065 | 0.64 to 1.65 | 0.008 | 0.2 |
| Over 1 to 1½ (25.4 to 38.1), incl | over 0.065 to 0.134 | over 1.65 to 3.40 | 0.01 | 0.25 |
| Over 1½ to 2 (38.1 to 50.8), incl | 0.025 to 0.049 | 0.64 to 1.24 | 0.01 | 0.25 |
| Over 1½ to 2 (38.1 to 50.8), incl | over 0.049 to 0.083 | over 1.24 to 2.11 | 0.011 | 0.28 |
| Over 1½ to 2 (38.1 to 50.8), incl | over 0.083 to 0.149 | over 2.11 to 3.78 | 0.012 | 0.3 |
| Over 2 to 2½ (50.8 to 63.5), incl | 0.032 to 0.065 | 0.81 to 1.65 | 0.012 | 0.3 |
| Over 2 to 2½ (50.8 to 63.5), incl | over 0.065 to 0.109 | over 1.65 to 2.77 | 0.013 | 0.33 |
| Over 2 to 2½ (50.8 to 63.5), incl | over 0.109 to 0.165 | over 2.77 to 4.19 | 0.014 | 0.36 |
| Over 2½ to 3½ (63.5 to 88.9), incl | 0.032 to 0.165 | 0.81 to 4.19 | 0.014 | 0.36 |
| Over 2½ to 3½ (63.5 to 88.9), incl | over 0.165 | over 4.19 | 0.02 | 0.51 |
| Over 3½ to 5 (88.9 to 127.0), incl | 0.035 to 0.165 | 0.89 to 4.19 | 0.02 | 0.51 |
| Over 3½ to 5 (88.9 to 127.0), incl | over 0.165 | over 4.19 | 0.025 | 0.64 |
| Over 5 to 7½ (127.0 to 190.5), incl | 0.049 to 0.250 | 1.24 to 6.35 | 0.025 | 0.64 |
| Over 5 to 7½ (127.0 to 190.5), incl | over 0.250 | over 6.35 | 0.03 | 0.76 |
| Over 7½ to 16 (190.5 to 406.4), incl | all | all | 0.00125 in./in. or mm/mm of circumference | |
| 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 |
| Delivery State | |
| Delivery State Choice | Surface Condition |
| Hot Rolled | Silver Bright |
| Polished (320#, 400#, 600#, Mirror finish) | |
| Cold Rolled | Silver Bright |
| Polished (320#, 400#, 600#, Mirror finish) | |
| Note: | |
| 1. If you require different deliver state than the above listed, kindly confirm with us. | |
| 2. In case of any enquiry or order, please kindly let us know any extra requirement not indicated here. | |
Related Product
Daxun Alloy
Regarding stainless steel pipes, we can handle any type of inquiry. Please feel free to ask us. We will make recommendations based on each client’s needs.
Yes — we maintain stock across common specifications and can typically ship quickly from inventory.
Yes, it can be customized. You can contact us and send us the customized specifications and quantity.
Our transportation methods generally include sea transportation, land transportation, and sea transportation. Reach you quickly and safely.
Pricing depends on grade, dimensions, quantity, and delivery condition. Send your specifications for a quote.
Every order goes through in-process and final inspection before shipment. Our quality management system is certified to ISO 9001.