Stainless Steel Seamless Tubes Manufacturer and Supplier in Thailand
Stainless steel seamless tube is a precision-manufactured hollow cylindrical component made without any welding, ensuring a smooth and uniform structure throughout. It is manufactured in a variety of sizes, grades and surface finishes to suit different industrial requirements. With years of expertise in tube manufacturing, Thaida Stainless Steel Manufacturing (Thailand) Co., Ltd. produces high-quality tubes at its advanced facility in Chon Buri, Thailand. As a leading stainless steel seamless tube supplier, we offer flexible services including custom cut-to-length options and bulk supply for large-scale operations. Our products meet international quality and safety standards such as ASTM A269 and API 5L, which will be detailed further on this page. Classified under HS code 730441, our seamless tubes are designed for smooth integration into global supply chains.
Other Related Products
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- Stainless Steel 316 Seamless Tubes
- Stainless Steel 316Ti Seamless Tubes
- Stainless Steel 317L Seamless Tubes
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Product Description & Key Features
A stainless steel seamless tube is a hollow cylindrical steel product manufactured without any welded seams, ensuring uniform strength, durability and a smooth interior surface. Seamless stainless steel tubing is produced by piercing a solid billet through a mandrel, creating a consistent structure free from weak spots caused by welding. These tubes offer superior mechanical properties in high-pressure and temperature applications. Available in a range of nominal outer diameters, wall thickness options and surface finishes to meet diverse application needs. The common standard tube sizes and material grades include 304 seamless tubing with bright annealed finish for a clean, smooth appearance. These seamless tubes meet international quality standards, including ASTM A 213.
The material grades, surface finishes, and dimensional range are mentioned below for your precise selection.
Material Grades
Surface Finishes
Dimensional Range
Benefits of Stainless Steel Seamless Tubes
The six important benefits of stainless steel seamless tubes are mentioned below to help you understand why they are preferred in various industries.
Corrosion Resistance
Enhanced Strength
No Welds or Seams
Smooth Interior Surface
High Temperature Tolerance
Dimensional Accuracy
These tubes maintain high dimensional accuracy, providing better tolerances compared to welded alternatives.
Why Choose Our Stainless Steel Seamless Tubes?
Thaida is a leading stainless steel seamless tubes manufacturer, offering a wide range of stainless steel tubes designed for exceptional quality and performance. Our seamless tubes stand out from the competition due to superior craftsmanship, custom solutions, and strict adherence to international standards, which ensure durability and reliability for all applications.
Competitive Pricing
Global Exports Expertise
Large Inventory & Fast Dispatch
Custom Sizes & Finishes
Industry Certifications & Compliance
Advanced Production Technology
After-Sales Support, Service- Technical Support
In-House Testing & Full Traceability
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Stainless Steel Seamless Tubes Specification
Below table provides detailed specifications for stainless steel seamless tubes, including product range, sizes, thicknesses, outside diameter, and surface finishes.
| Tubes Specifications | ASTM A213 / ASME SA213 |
|---|---|
| Dimensional specification | ANSI/ASME B36.19M, ANSI/ASME B36.10M |
| ASTM A213 Seamless Tubes Size | 1 / 2" NB - 16" NB |
| Outside Diameter | 6.00 mm OD up to 914.4 mm OD, Sizes up to 24” NB available Ex-stock, OD Size Steel Tubes available Ex-stock |
| SS Tubes Manufacturing Shapes | Hydraulic, Round, Rectangle, Square, Hex, Honed |
| SS Tubes Manufacturing Techniques | Seamless |
| Stainless Steel Tubes Schedule Thickness Range | SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| SS Tubes End Types | Plain End, Beveled End, Treaded One End, TBE (Treaded Both Ends) |
| Delivery Condition of SS Tubes | Annealed and Pickled, Polished, Bright Annealed, Cold Drawn |
| Surface Finish | No.1, No.4, No.8 Mirror Finish, 2B |
| Value Added Services | Cutting, Beveling, Polishing, Threading, Destructive, Non Destructive, Ultrasonic Testing |
| Inspection and Test Reports | EN 10204 3.1, Mill Test Certificates, Chemical Reports, PMI Test Reports, Mechanical Reports, Third Party Inspection, NABL Approved Lab, Visual Inspection, Destructive Test and Non Destructive Test Reports |
| Marking | Specification Grade Nominal Tubes Sizes Tubes Schedule or Wall Thickness Manufacturing Method (Seamless) Heat Number Manufacturer’s Name or Custom Logo - on request Marked Tubes Sample: ANSI B36.19 ASTM A 213 12" NB SCH 40S SEAMLESS HEAT NO. XXXX |
| Outside Finish | 2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Tubes, Finish as per customer Requirements |
| Delivery Condition | Annealed and Pickled, Polished, Bright Annealed, Cold Drawn |
| Packing of SS Tubes | Packed in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customers Requests |
| Specials | Sizes and Specifications other than above can be on request |
Types of Stainless Steel Seamless Tubes
The types of stainless steel seamless tubes are categorized based on their specific grades, standards, and manufacturing methods. The types mentioned below include Instrumentation Tubes, Hydraulic & Pneumatic Tubes, U-Bend Tubes, etc.
Instrumentation Tubes
Designed for precise measurement and control applications in various industries..
Boiler & Heat Exchanger Tubes
Used for heat transfer in boilers and heat exchangers, with high-temperature tolerance.
Hydraulic & Pneumatic Tubes
Made for fluid and air transport in hydraulic and pneumatic systems.
Sanitary Tubes
Ideal for clean environments like food and pharmaceutical industries, offering high corrosion resistance.
Mechanical / Structural Tubes
Engineered for use in mechanical and structural applications, providing strength and durability.
High-Pressure Seamless Tubes
Built to withstand high-pressure environments, ensuring safety and reliability.
U-Bend Tubes
Bent tubes used in heat exchangers and boilers to save space and improve efficiency.
Pickled & Annealed Tubes
Treated for enhanced surface finish and improved corrosion resistance.
Bursting Pressure Chart
Bursting Pressure Chart
| O.D. inch | Wall Thickness | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.020 | 0.025 | 0.028 | 0.035 | 0.049 | 0.065 | 0.083 | 0.095 | 0.109 | 0.120 | 0.156 | 0.188 | 0.250 | 0.313 | 0.375 | 0.500 | 0.625 | 0.750 | |
| 1/8 | 2 .022 | 3 .026 | 39,000 .029 | 42,000 .033 | 58,800 .040 | – | – | – | – | – | – | – | – | – | – | – | – | – |
| 3/16 | 15,998 .035 | 19,950 .043 | 22,403 .047 | 29,498 .057 | 39,203 .073 | 51,863 083 | – | – | – | – | – | – | – | – | – | – | – | – |
| 1/4 | 12,000 .049 | 15,000 .060 | 16,800 .066 | 21,000 .080 | 29,400 .105 | 39,000 .128 | – | – | – | – | – | – | – | – | – | – | – | – |
| 5/16 | 9,600 .062 | 12,000 .078 | 13,440 .085 | 16,800 .103 | 23,520 .103 | 31,200 .172 | 39,780 .203 | 45,750 .221 | – | – | – | – | – | – | – | – | – | – |
| 3/8 | 8,003 .075 | 9,998 .093 | 11,998 .103 | 14,003 .127 | 19,598 .170 | 26,003 .215 | 33,203 .258 | 38,003 .284 | 43,598 .309 | 48,000 .326 | – | – | – | – | – | – | – | – |
| 1/2 | 6,000 .102 | 7,500 .129 | 8,400 .141 | 10,500 .173 | 14,700 .236 | 19,500 .302 | 24,900 .369 | 28,500 .418 | 32,700 .455 | 36,000 .487 | – | – | – | – | – | – | – | – |
| 5/8 | 4,800 .129 | 6,000 .160 | 6,720 .178 | 8,400 .221 | 11,760 .301 | 15,600 .388 | 19,920 .480 | 22,888 .537 | 26,160 .600 | 28,800 .647 | 37,440 .781 | 44,880 .877 | – | – | – | – | – | – |
| 3/4 | 3,998 .155 | 5,003 .193 | 5,603 .215 | 6,998 .267 | 9,803 .366 | 12,997 .475 | 16,598 .591 | 18,998 .664 | 21,803 .746 | 24,000 .807 | 31,200 .990 | 37,403 1.128 | – | – | – | – | – | – |
| 7/8 | 3,428 .183 | 4,283 .227 | 4,800 .253 | 6,000 .314 | 8,400 .432 | 11,145 .562 | 14,228 .702 | 16,283 .791 | 18,683 .891 | 20,573 .968 | 26,745 1.198 | 32,055 1.379 | – | – | – | – | – | – |
| 1 | 3,000 .209 | 3,750 .260 | 4,200 .290 | 5,250 .360 | 7,350 .497 | 9,750 .649 | 12,450 .812 | 14,250 .918 | 16,350 1.037 | 18,000 1.128 | 23,400 1.406 | 28,050 1.630 | 37,500 2.003 | – | – | – | – | – |
| 1‐1/8 | 2,663 .236 | 3,330 .294 | 3,735 .328 | 4,665 .407 | 6,533 .563 | 8,670 .736 | 11,070 .923 | 12,668 1.045 | 14,535 1.183 | 15,998 1.288 | 20,798 1.614 | 24,930 1.881 | 33,330 2.336 | – | – | – | – | – |
| 1-1/4 | 2,400 .262 | 3,000 .326 | 3,360 .365 | 4,200 .454 | 5,880 .628 | 7,800 .822 | 9,960 1.034 | 11,400 1.172 | 13,080 1.328 | 14,400 1.502 | 18,720 1.823 | 22,440 2.132 | 30,000 2.670 | – | – | – | – | – |
| 1-3/8 | – | – | 3,053 .402 | 3,818 .501 | 5,348 .694 | 7,087 .909 | 9,053 1.145 | 10,365 1.299 | 11,888 1.473 | 13,088 1.608 | 17,018 2.031 | 20,400 2.383 | 27,270 3.004 | – | – | – | – | – |
| 1-1/2 | – | – | 2,948 .440 | 3,503 .547 | 4,898 .759 | 6,503 .996 | 8,303 1.256 | 9,503 1.426 | 10,890 1.619 | 12,000 1.769 | 15,600 2.239 | 18,698 2.634 | 24,998 3.338 | – | – | – | – | – |
| 1-3/4 | – | – | – | 3,000 .641 | 4,200 .890 | 5,573 1.170 | 7,118 1.478 | 8,145 1.679 | 9,345 1.910 | 10,283 2.160 | 13,373 2.656 | 16,028 3.136 | 21,428 4.005 | – | – | – | – | – |
| 2 | – | – | – | 2,625 .734 | 3,675 1.021 | 4,875 1.343 | 6,225 1.699 | 7,125 1.933 | 8,175 2.201 | 9,000 2.409 | 11,700 3.072 | 14,025 3.638 | 18,750 4.673 | 23,475 5.639 | 28,125 6.508 | 37,500 8.010 | – | – |
| 2-1/4 | – | – | – | 2,333 .828 | 3,270 1.152 | 4,335 1.517 | 5,535 1.921 | 6,330 2.250 | 7,268 2.556 | 8,003 2.730 | 10,403 3.489 | 12,465 4.140 | 16,665 5.340 | 20,865 6.475 | 24,998 7.509 | 33,330 9.345 | – | – |
| 2‐1/2 | – | – | – | 2,100 .921 | 2,940 1.283 | 3,900 1.690 | 4,980 2.143 | 5,700 2.440 | 6,540 2.783 | 7,200 3.050 | 9,360 3.905 | 11,220 4.642 | 15,000 6.008 | 18,780 7.331 | 22,500 8.511 | 30,000 10.680 | 37,500 12.515 | – |
| 2-3/4 | – | – | – | 1,913 1.015 | 2,670 1.413 | 3,548 1.864 | 4,530 2.364 | 5,183 2.699 | 5,948 3.177 | 6,548 3.495 | 8,513 4.322 | 10,200 5.144 | 13,636 6.675 | 17,070 8.147 | 20,453 9.512 | 27,270 12.015 | 34,088 14.180 | 40,913 16.020 |
| 3 | – | – | – | 1,748 1.108 | 2,453 1.544 | 3,248 2.037 | 4,148 2.586 | 4,745 2.947 | 5,453 3.393 | 6,000 3.691 | 7,800 4.739 | 9,353 5.646 | 12,503 7.343 | 15,653 8.982 | 18,750 10.513 | 24,998 13.350 | 31,253 15.853 | 37,500 18.020 |
| 3-1/4 | – | – | – | – | – | 3,000 2.211 | 3,833 2.805 | 4,338 3.201 | 5,033 3.634 | 5,535 3.975 | 7,200 5.155 | 8,633 6.148 | 11,535 8.010 | 14,445 9.818 | 17,310 11.514 | 23,078 14.685 | 28,845 17.520 | 34,613 20.025 |
| 3-1/2 | – | – | – | – | – | 2,783 2.385 | 3,555 3.029 | 4,073 3.455 | 4,673 3.976 | 5,145 4.385 | 6,683 5.571 | 8,018 6.650 | 10,718 8.678 | 13,418 10.650 | 16,073 12.515 | 21,428 16.020 | 26,783 19.191 | 32,146 22.027 |
| 3‐3/4 | – | – | – | – | – | 2,603 2.558 | 3,323 3.248 | 3,803 3.708 | 4,358 4.235 | 4,800 4.650 | 6,240 5.988 | 7,478 7.152 | 9,998 9.345 | 12,518 11.490 | 15,000 13.520 | 20,003 17.355 | 24,998 20.860 | 30,000 24.030 |
| 4 | – | – | – | – | – | 2,438 2.732 | 3,112 3.472 | 3,563 3.962 | 4,088 4.530 | 4,500 4.973 | 5,850 6.404 | 7,013 7.654 | 9,375 10.010 | 11,738 12.330 | 14,063 14.520 | 18,750 18.690 | 23,438 22.530 | 28,125 26.030 |
Stainless Steel Seamless Tubes Dimension
Stainless Steel Seamless Tubes Dimension
| Wall thickness in mm. | 0.5 | 0.6 | 0.7 | 0.8 | 1 | 1.2 | 1.6 | 2 | 2.6 | 3 | 3.2 | 3.6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| O.D. in mm. | Weight in kg/meter | |||||||||||
| 6 | 0.069 | 0.081 | 0.093 | 0.104 | 0.125 | 0.144 | 0.176 | – | – | – | – | – |
| 9.52 | 0.112 | 0.134 | 0.154 | 0.174 | 0.213 | 0.249 | 0.317 | – | – | – | – | – |
| 10 | 0.119 | 0.141 | 0.163 | 0.184 | 0.225 | 0.264 | 0.336 | – | – | – | – | – |
| 12.7 | 0.153 | 0.182 | 0.21 | 0.238 | 0.293 | 0.345 | 0.444 | – | – | – | – | – |
| 14 | 0.169 | 0.201 | 0.233 | 0.264 | 0.325 | 0.384 | 0.496 | – | – | – | – | – |
| 15.87 | 0.192 | 0.229 | 0.266 | 0.301 | 0.372 | 0.44 | 0.571 | 0.694 | – | – | – | – |
| 19 | 0.231 | 0.276 | 0.32 | 0.364 | 0.45 | 0.534 | 0.696 | 0.85 | 1.066 | 1.2 | 1.264 | – |
| 25 | 0.306 | 0.366 | 0.425 | 0.484 | 0.6 | 0.714 | 0.936 | 1.15 | 1.456 | 1.65 | 1.744 | 1.926 |
| 25.4 | 0.311 | 0.372 | 0.432 | 0.492 | 0.61 | 0.726 | 0.952 | 1.17 | 1.482 | 1.68 | 1.776 | 1.962 |
| 31.8 | – | – | – | – | – | 0.918 | 1.208 | 1.49 | 1.898 | 2.16 | 2.288 | 2.538 |
| 38 | – | – | – | – | – | 1.104 | 1.456 | 1.8 | 2.301 | 2.625 | 2.784 | 3.096 |
| 44.5 | – | – | – | – | – | 1.299 | 1.716 | 2.125 | 2.724 | 3.113 | 3.304 | 3.681 |
| 50.8 | – | – | – | – | – | 1.488 | 1.968 | 2.44 | 3.133 | 3.585 | 3.808 | 4.248 |
| 63.5 | – | – | – | – | – | – | 2.476 | 3.075 | 3.959 | 4.538 | 4.824 | 5.391 |
| 76.1 | – | – | – | – | – | – | 2.98 | 3.705 | 4.778 | 5.483 | 5.832 | 6.525 |
| 101.6 | – | – | – | – | – | – | 4 | 4.98 | 6 | 7 | 7,872 | 8.82 |
Testing & Inspection
Testing & Inspection
The below given testing and inspection methods are carried out as per ASTM and API standards for stainless steel seamless tubes.
- Ultrasonic Testing: Detects internal flaws such as cracks or voids.
- Eddy Current Testing: Identifies surface and near-surface defects.
- Hydrostatic Test: Verifies the tube’s pressure integrity by testing its resistance to internal pressure.
Comparison: Seamless vs Welded Tubes
Comparison: Seamless vs Welded Tubes
The key differences between seamless and welded stainless steel tubes in terms of manufacturing process, structure, and technical specifications are given below.
| Feature | Seamless Tubing | Welded Tubing |
|---|---|---|
| Manufacturing Process | Hot-forming or cold forming | Welding of a tube seam |
| Strength | Higher uniform strength | Lower strength at weld |
| Durability | Excellent for high-pressure environments | Suitable for lower pressure |
| Cost | More expensive | More affordable |
| Applications | Critical applications | General purpose use |
Stainless Steel Seamless Tubing Manufacturing Process
The following are the 5 steps involved in the stainless steel seamless tubes manufacturing process to achieve high-quality output.
1. Raw Material Selection
High-quality stainless steel billets and strips are carefully selected for superior strength and corrosion resistance.
2. Pipes Formation
The selected raw material is formed into pipes using seamless extrusion methods, depending on the application.
3. Heat Treatment
Pipes undergo required controlled heat treatment to enhance mechanical properties and relieve internal stresses.
4. Cold Working and Finishing
After heat treatment, pipes are cold-worked for better surface finish, dimensional accuracy and improved strength.
5. Quality Control and Testing
Every pipe is thoroughly inspected and tested to ensure it meets international quality standards for performance and reliability.
Stainless Steel Seamless Tubes Applications
Stainless steel seamless tubes are mainly used in the oil and gas industry for pipelines, drilling, and refineries due to their strength under high pressure and corrosive conditions. Aerospace and defence use them in hydraulic and fuel systems, while construction relies on them for structural supports and handrails. In power generation, they serve boilers and heat exchangers, handling high temperatures. The food and beverage industry depends on these tubes for sanitary piping that meets strict hygiene standards, making them versatile across demanding applications.
Aerospace & Defense
Automotive and Transportation
Chemical and Petrochemical Industry
Construction and Architecture
Food and Beverage Industry
Marine & Shipbuilding
Oil and Gas Industry
Pharmaceutical & Biotechnology
Power Generation & Heat Exchange
FAQ's
What makes stainless steel seamless tubes suitable for high-pressure applications?
What makes stainless steel seamless tubes suitable for high-pressure applications?
Stainless steel seamless tubes are perfect for high-pressure applications, as it is made from a single piece of steel with no welds or joints, ensuring uniform strength and superior structural integrity. It offers high tensile and yield strength, excellent corrosion and temperature resistance, and a smooth interior surface that reduces friction and enhances flow efficiency. These qualities make it highly reliable and durable for critical applications in industries such as oil and gas, power generation, and petrochemicals.
Are stainless steel seamless tubes resistant to rust and staining?
Are stainless steel seamless tubes resistant to rust and staining?
Yes, stainless steel seamless tubes resist rust and staining because of the chromium-based protective oxide layer. However, exposure to high chloride levels can damage this layer, making regular maintenance important to prevent corrosion over time.
Which industries commonly use stainless steel seamless tubes?
Which industries commonly use stainless steel seamless tubes?
Stainless steel seamless pipes are widely used across various industries due to its strength, corrosion resistance, and durability. In construction, it is used for water, gas, and drainage systems, as well as structural support in buildings and stadiums. The oil and gas sector relies on them for pipelines, refineries, and offshore rigs because they withstand high pressure and harsh environments. It is also essential in food, chemical, and pharmaceutical processing for transporting corrosive fluids safely, in fertilizer plants for high-pressure systems, and in heat exchangers for efficient thermal transfer.
Are stainless steel seamless tubes available in both metric and imperial sizes?
Are stainless steel seamless tubes available in both metric and imperial sizes?
Stainless steel seamless tubes are available in both metric and imperial sizes, ensuring a precise fit for a wide range of applications.
What is seamless stainless steel tubing?
What is seamless stainless steel tubing?
Seamless stainless steel tubing is a hollow cylindrical product with no weld seam, offering superior strength, uniformity, and corrosion resistance. Its continuous structure ensures consistent wall thickness and the ability to withstand high pressure, temperature, and mechanical stress, making it ideal for demanding industrial applications.
What are seamless steel tubes used for?
What are seamless steel tubes used for?
Seamless steel tubes are used across industries for their strength, durability, and ability to handle high pressure and temperature. It serves an essential role in oil and gas transport, power generation, and chemical processing, as well as in construction, automotive, and aerospace for structural and mechanical applications. Its corrosion resistance and precision also make them suitable for medical devices and food processing equipment.
What is the difference between extruded and seamless tubing?
What is the difference between extruded and seamless tubing?
Extruded tubing is a manufacturing process where a heated metal ingot is pushed through a die to form a specific cross-section, yielding products that can be either seamless or welded (porthole). In contrast, seamless tubing is a specialized, high-integrity result of this extrusion process, specifically made from an unwelded, single piece of metal, which makes it ideal for superior strength and demanding, high-pressure environments.
How are seamless steel tubes made?
How are seamless steel tubes made?
Seamless steel tubes are manufactured by heating a solid steel billet and piercing it to form a hollow shell, which is elongated and rolled to achieve the desired size and wall thickness. After shaping, the tubes undergo heat treatment, straightening, and finishing to ensure precise dimensions and high-quality performance.