- English
- Español
- Português
- русский
- Français
- 日本語
- Deutsch
- tiếng Việt
- Italiano
- Nederlands
- ภาษาไทย
- Polski
- 한국어
- Svenska
- magyar
- Malay
- বাংলা ভাষার
- Dansk
- Suomi
- हिन्दी
- Pilipino
- Türkçe
- Gaeilge
- العربية
- Indonesia
- Norsk
- تمل
- český
- ελληνικά
- український
- Javanese
- فارسی
- தமிழ்
- తెలుగు
- नेपाली
- Burmese
- български
- ລາວ
- Latine
- Қазақша
- Euskal
- Azərbaycan
- Slovenský jazyk
- Македонски
- Lietuvos
- Eesti Keel
- Română
- Slovenski
- मराठी
- Srpski језик
Linear Seam Welded Steel Pipe
Manufacturers and contractors seeking robust, dimensionally accurate, and readily available steel piping solutions consistently turn to Linear Seam Welded Steel Pipe. This category, also frequently referred to as Straight Seam Welded Steel Tube or ERW Longitudinal Welded Pipe, defines a high-efficiency manufacturing process where the longitudinal seam is formed and welded in a straight line parallel to the pipe's axis. The production method is highly automated, ensuring consistent wall thickness and excellent roundness, which is critical for structural integrity and fluid flow. These pipes are a cornerstone for structural frameworks, mechanical systems, and low to medium-pressure fluid transport. The inherent strength and straightness of a Straight Welded Seam Steel Pipe make it the preferred choice for architectural columns, conveyor rollers, and fencing systems. For applications demanding a balance of performance and cost-effectiveness, a Longitudinal Seam Welded Tube offers an optimal solution, providing reliable performance without the premium cost of seamless alternatives.
The manufacturing excellence of a Linear Seam Welded Steel Pipe begins with high-quality steel coils, which are unrolled, leveled, and formed through a series of rolls. The edges are prepared and brought together under controlled pressure and heat to create a uniform longitudinal weld. This process is precisely calibrated to produce pipes with exceptional dimensional tolerances. Key parameters that define the suitability of these pipes for specific projects include material grade, dimensions, wall thickness, and mechanical properties. The following specifications provide a detailed overview of the standard and custom offerings available.
- Material Standards: Manufactured from carbon steel grades per ASTM A53, ASTM A500, ASTM A501, and ASTM A36. Also available in low-alloy and high-strength low-alloy (HSLA) steels.
- Welding Process: Utilizes high-frequency induction welding (HFIW) or electric resistance welding (ERW), ensuring a clean, strong, and consistent seam.
- Surface Finish: Standard mill finish (unpainted), black, galvanized (hot-dip or electro-galvanized), or with various primer coatings.
- End Finish: Plain ends, beveled ends for welding, or threaded ends as per customer requirements.
- Testing & Certification: All pipes undergo rigorous non-destructive testing (NDT), including ultrasonic or eddy current testing. Full material traceability and mill test certificates (MTC) are provided.
| Outer Diameter (OD) | Wall Thickness (WT) | Common Lengths | Primary Applications |
|---|---|---|---|
| 1/2" to 24" (13mm to 610mm) | Schedule 10 to Schedule 80 | 20 ft, 24 ft, 40 ft (6m to 12m) | Structural Framing, Handrails, Fencing |
| 26" to 48" (660mm to 1220mm) | 0.25" to 1.0" (6mm to 25mm) | Custom lengths up to 50 ft (15m+) | Piling, Large-Diameter Conduits, Casing |
| Square & Rectangular Profiles | 0.083" to 0.50" (2mm to 13mm) | 20 ft, 24 ft (6m to 7.3m) | Architectural Columns, Machine Bases, Supports |
| Grade / Specification | Yield Strength (min) | Tensile Strength (min) | Elongation (%) |
|---|---|---|---|
| ASTM A53 Grade B | 35,000 psi (240 MPa) | 60,000 psi (415 MPa) | – |
| ASTM A500 Grade B | 42,000 psi (290 MPa) | 58,000 psi (400 MPa) | 23 |
| ASTM A500 Grade C | 46,000 psi (317 MPa) | 62,000 psi (427 MPa) | 21 |
| ASTM A36 | 36,000 psi (250 MPa) | 58,000 - 80,000 psi (400-550 MPa) | 23 |
Related Products
Hot Products
Galvanized Square And Rectangular Steel Pipe
Xinlida’s China Galvanized Square And Rectangular Steel Pipe is square or rectangular section steel pipe, the surface after hot galvanizing treatment.This treatment gives it excellent corrosion resistance, rust resistance, greatly extending the service life.Moreover, hot-dip galvanizing also enhances the hardness of steel pipes, so that they can maintain stable performance in complex environments.
Galvanized Square And Rectangular Steel Tube
Among many China Galvanized Square And Rectangular Steel Tube manufacturers, Tianjin Xinlida Steel Pipe Co., Ltd., as an enterprise established in 2015, focuses on steel pipe manufacturing, processing and sales. With a number of qualification certificates and administrative licenses, it has established a good reputation in the industry and is fully competitive.
Cold-rolled seamless steel pipes for building support
In the construction industry, the stability of the supporting structure is directly related to the safety and quality of the overall project. Cold-rolled seamless steel pipes for building support, as a key material in the support system, have become the first choice for many engineering projects due to their unique manufacturing process and superior performance.
Black Circular Tube
As a common pipe, Black Circular Tube plays a key role in many industries.Tianjin Xinlida produces a wide range of black round tubes with outer diameter from DN15-DN250 mm and wall thickness of 1.5 - 20 mm. The size can also be customized according to special needs.This diversified specification design enables it to be flexibly applied to different scenarios.Whether it is small mechanical parts manufacturing, large building structure construction, oil and gas transmission engineering, you can find suitable pipes.
Hot-Dip Galvanized Round Pipe
Tianjin Xinlida Steel Pipe Co., Ltd. has been deeply involved in the steel pipe industry for many years. Relying on a complete business system of domestic production + overseas bases + global trade, and leveraging the mature production capacity and international production standards of its overseas production base in the Philippines, the company has dedicated itself to developing this hot-dip galvanized round pipe. The product boasts four core advantages: long-lasting corrosion resistance, high strength, easy installation, and high cost-effectiveness. It perfectly solves industry pain points such as easy corrosion, insufficient load-bearing capacity, cumbersome construction, and high procurement costs of pipes used in outdoor, underground, coastal, and chemical areas. It is the ideal pipe choice for various engineering projects in construction, energy, and transportation.
Low and medium pressure cold-rolled seamless steel pipe
Low and medium pressure cold-rolled seamless steel pipe is a type of seamless steel pipe processed by cold rolling. It is mainly used for transporting low and medium pressure fluids, with working pressure generally not exceeding 6 MPa. It features uniform wall thickness, a high degree of inner surface smoothness, and good dimensional accuracy. It is widely used in construction engineering, energy pipelines, and transportation facilities.
- Related Blog
- Reviews
