Seamless Boiler Tube
Classification :
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Product Details
Boiler Tube
Pipe Type: Boiler Seamless Tube, Seamless Boiler Tube, Boiler Pipe
Application: For High-pressure Fluids Transmission (boiler, heat exchanger, condenser)
Specification: OD: 0.84'' ~ 28'' (21.3 ~ 711mm)
WT: 0.091'' ~ 1.575'' (2.3 ~ 40mm)
LENGTH: Fixed Length (5.8/6/11.8/12 mtr), SRL, DRL
Standard: ASTM A179, ASTM A192, ASTM A210
Ends: Square Ends/Plain Ends (straight cut, saw cut, torch cut), Beveled/Threaded Ends
Surface: Bare, Lightly Oiled, Black/Red/Yellow Painting, Zinc/Anti-corrosive Coating
Packing: Bundled/In Bulk, Plastic Caps Plugged, Waterproof Paper Wrapped
Specification of Boiler Tube
| SPECIFICATION OF BOILER TUBES | |||||||
| OD*WT | OD*WT | OD*WT | OD*WT | OD*WT | OD*WT | OD*WT | OD*WT |
| 14*3 | 38*5,5 | 89*5 | 133*18 | 34*5 | 76*6 | 133*7 | 219*7 |
| 14*3,5 | 42*3 | 89*5,5 | 159*6 | 34*6,5 | 76*7 | 133*8 | 219*8 |
| 14*4 | 42*3,5 | 89*6 | 159*6,5 | 38*3 | 76*8 | 133*10 | 219*9 |
| 16*3 | 42*4 | 89*7 | 159*7 | 38*3,5 | 76*9 | 133*12 | 219*10 |
| 18*2 | 42*5 | 89*7,5 | 159*8 | 38*4 | 76*10 | 133*13 | 219*12 |
| 18*3 | 42*6 | 89*8 | 159*9,5 | 38*4,5 | 89*4 | 133*14 | 219*13 |
| 18*4 | 42*8 | 89*9 | 159*10 | 38*5 | 89*4,5 | 133*16 | 219*14 |
| 18*5 | 45*3 | 89*10 | 159*12 | 219*16 | 273*36 | 356*28 | 426*12 |
| 19*2 | 45*4 | 89*11 | 159*14 | 219*18 | 273*40 | 356*36 | 426*13 |
| 21*4 | 45*5 | 89*12 | 159*16 | 219*20 | 273*42 | 377*9 | 426*14 |
| 22*2,5 | 45*6 | 108*4,5 | 159*18 | 219*22 | 273*45 | 377*10 | 426*17 |
| 22*3 | 45*7 | 108*5 | 159*20 | 219*24 | 298,5*36 | 377*12 | 426*20 |
| 22*4 | 48*4 | 108*6 | 159*28 | 219*25 | 325*8 | 377*14 | 426*22 |
| 22*5 | 48*4,5 | 108*7 | 168*6 | 219*26 | 325*9 | 377*15 | 426*30 |
| 25*2,5 | 48*5 | 108*8 | 168*7 | 219*28 | 325*10 | 377*16 | 426*36 |
| 25*3 | 48*6 | 108*9 | 168*8 | 219*30 | 325*11 | 377*18 | 426*40 |
| 25*4 | 48*7 | 108*10 | 168*9,5 | 219*32 | 325*12 | 377*20 | 426*50 |
| 25*5 | 48,3*12,5 | 108*12 | 168*10 | 219*35 | 325*13 | 377*22 | 457*9,5 |
| 25*5,5 | 51*3 | 108*14 | 168*11 | 219*38 | 325*14 | 377*25 | 457*14 |
| 27*3,5 | 51*3,5 | 108*15 | 168*12 | 273*7 | 325*15 | 377*32 | 457*16 |
| 27*4 | 51*4 | 108*16 | 168*14 | 273*8 | 325*16 | 377*36 | 457*19 |
| 27*5 | 51*5 | 108*20 | 168*15 | 273*9 | 325*17 | 377*40 | 457*24 |
| 27*5,5 | 51*6 | 114*5 | 168*16 | 273*9,5 | 325*18 | 377*45 | 457*65 |
| 28*2,5 | 57*4 | 114*6 | 168*18 | 273*10 | 325*20 | 377*50 | 508*13 |
| 28*3 | 57*5 | 114*7 | 168*20 | 273*11 | 325*22 | 406*9,5 | 508*16 |
| 28*3,5 | 57*5,5 | 114*8 | 168*22 | 273*12 | 325*23 | 406*11 | 508*20 |
| 28*4 | 57*6 | 114*8,5 | 168*25 | 273*13 | 325*25 | 406*13 | 508*22 |
| 30*2,5 | 60*4 | 114*9 | 168*28 | 273*15 | 325*28 | 406*17 | 558,8*14 |
| 32*2,5 | 60*4 | 114*10 | 180*10 | 273*16 | 325*30 | 406*22 | 530*13 |
| 32*3 | 60*5 | 114*11 | 194*10 | 273*18 | 325*32 | 406*32 | 530*20 |
| 32*3,5 | 60*6 | 114*12 | 194*12 | 273*20 | 325*36 | 406*36 | 570*12,5 |
| 32*4 | 60*7 | 114*13 | 194*14 | 273*22 | 325*40 | 406*40 | 610*13 |
| 32*4,5 | 60*8 | 114*14 | 194*16 | 273*25 | 325*45 | 406*55 | 610*18 |
| 32*5 | 60*9 | 114*16 | 194*18 | 273*28 | 356*9,5 | 406,4*50 | 610*78 |
| 34*3 | 60*10 | 114*18 | 194*20 | 273*30 | 356*12 | 406,4*55 | 624*14,2 |
| 34*4 | 76*4,5 | 133*5 | 194*26 | 273*32 | 356*15 | 406*60 | 824*16,5 |
| 34*4,5 | 76*5 | 133*6 | 219*6,5 | 273*35 | 356*19 | ||
Technical data
Tolerance
| Standard | Out Diameter | Tolerance |
| GB3087 | ≤180 | ±1.0%(min: ±0.5mm) |
| GB5310 | ≤50 | ±0.5mm |
| >50 | ±1.0% |
| Standard | Wall Thickness(mm) | Tolerance |
| GB3087 | 3-20 | +15%,12.5% |
| >20 | ±12.5% | |
| GB5310 | <3.5 | +15%,-10% |
| 3.5-20 | +15%,-10% | |
| >20 | ±10% |
Chemical Composition & Mechanical Properties
| Standard | Grade | Chemical composition(%) | Mechanical properties | ||||||
| C | Si | Mn | P | S | Tensile Strength(Mpa) | Yield Strength(Mpa) | Elongation(%) | ||
| DIN17175 | St35.8 | ≤0.17 | 0.10-0.35 | 0.40-0.80 | ≤0.030 | ≤0.030 | 360-480 | ≥235 | ≥25 |
| St45.8 | ≤0.21 | 0.10-0.35 | 0.40-1.20 | ≤0.030 | ≤0.030 | 410-530 | ≥255 | ≥21 | |

Custom-made irregular-shaped tubes
Irregular-shaped tubes are hollow steel materials with non-standard irregular cross-sections, which are different from ordinary round tubes. We support customized production based on drawings and samples. The cross-section, material, wall thickness, and length can be adjusted according to working conditions to reduce subsequent cutting and welding processes and improve the overall strength and assembly accuracy of the components.
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Our company has passed ISO9001 quality management system certification, Our Mill product with CE/EN10204 / ASTM/Classification society certificate/CASO/BIS etc certificate.All the customers give good appreciation to our products.We are glad to be your good partner.

Application Areas
Steel is widely used in steel structure workshops, bridge frames, main structures of high-rise buildings, and infrastructure construction (such as highways, oil and gas pipelines). Its high strength properties ensure load-bearing stability and seismic performance. In ship manufacturing, steel is used to build hull structures, decks, and internal components. Hot-rolled coils rely on their load-bearing capacity to adapt to harsh environments.

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Company Mission Focused on the supply and custom processing of metal materials, we leverage reliable sourcing, consistent quality, and efficient service to help clients reduce costs and enhance efficiency, create opportunities for our employees, and empower the development of the industry as a whole.
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Rooted in the Qilu region, reaching across the nation, and expanding globally, we aspire to become a comprehensive supply chain service provider within the metal materials industry—distinguished by high quality and an impeccable reputation—and to build a respected, sustainable industrial brand destined to endure for a century.
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With a commitment to excellence, innovation, and sustainability, the company has established itself as a trusted partner in the international steel industry.After nearly two decades of relentless endeavour, our client base now spans over 110 countries and regions across Europe, the Middle East, South America, and Southeast Asia.
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Focused on the supply and custom processing of metal materials, we leverage reliable sourcing, consistent quality, and efficient service to help clients reduce costs and enhance efficiency, create opportunities for our employees, and empower the development of the industry as a whole.
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