Tube Schedule 40 is a common wall thickness standard for pipelines, belonging to the size system of ANSI/ASME B36.10 (carbon steel pipe) or B36.19 (stainless steel pipe). The "Schedule" here represents the wall thickness grade of the pipeline, and Schedule 40 (abbreviated as Sch 40) is the most commonly used and widely used grade.
Features of Tube Schedule 40:
Moderate wall thickness: thicker than Schedule 10 but thinner than Schedule 80.
Reliable strength: able to withstand moderate pressure and mechanical stress.
Strong universality: It has a large number of applications in both industrial and civilian fields.
Diverse materials: can be carbon steel pipe, stainless steel pipe, or galvanized steel pipe.
Steel Tube Schedule 40 Common Applications:
Water supply and drainage system
Fire pipeline
Natural gas and steam transportation
Industrial pipelines and mechanical structural components
Buildings and Infrastructure
Schedule 40 Steel Tube Dimensions:
| ASTM A53 or API 5L standard pipe schedule 40 | |||||
| Nominal size | DN | Outside diameter | Outside diameter | schedule 40 thickness | |
| Wall thickness | Wall thickness | ||||
| [inch] | [inch] | [mm] | [inch] | [mm] | |
| 1/2 | 15 | 0.84 | 21.3 | 0.109 | 2.77 |
| 3/4 | 20 | 1.05 | 26.7 | 0.113 | 2.87 |
| 1 | 25 | 1.315 | 33.4 | 0.133 | 3.38 |
| 1 1/4 | 32 | 1.66 | 42.2 | 0.14 | 3.56 |
| 1 1/2 | 40 | 1.9 | 48.3 | 0.145 | 3.68 |
| 2 | 50 | 2.375 | 60.3 | 0.154 | 3.91 |
| 2 1/2 | 65 | 2.875 | 73 | 0.203 | 5.16 |
| 3 | 80 | 3.5 | 88.9 | 0.216 | 5.49 |
| 3 1/2 | 90 | 4 | 101.6 | 0.226 | 5.74 |
| 4 | 100 | 4.5 | 114.3 | 0.237 | 6.02 |
| 5 | 125 | 5.563 | 141.3 | 0.258 | 6.55 |
| 6 | 150 | 6.625 | 168.3 | 0.28 | 7.11 |
| 8 | 200 | 8.625 | 219.1 | 0.322 | 8.18 |
| 10 | 250 | 10.75 | 273 | 0.365 | 9.27 |
Schedule 40 and Other Schedule Comparision:
Taking the commonly used pipe diameter of 2 inches (2") as an example, show the differences in wall thickness between Schedule 10, 40, and 80:
| Nominal Pipe Size (NPS) | Schedule 10 (Sch 10) | Schedule 40 (Sch 40) | Schedule 80 (Sch 80) |
| 2" (OD 60.3 mm) | 2.77 mm | 3.91 mm | 5.54 mm |
| 3" (OD 88.9 mm) | 3.05 mm | 5.49 mm | 7.11 mm |
| 4" (OD 114.3 mm) | 3.38 mm | 6.02 mm | 8.18 mm |
| 6" (OD 168.3 mm) | 3.56 mm | 7.11 mm | 9.27 mm |
Sch 10: thinnest, cost-effective, suitable for low-voltage systems.
Sch 40: Medium thickness, most widely used, balancing strength and cost.
Sch 80: thickest, with strong pressure resistance, suitable for high voltage or high-strength applications.
What is The Advantage of Youfa Brand Schedule 40 Carbon Pipe ?
As a leading manufacturer in China's steel pipe industry, Youfa Group has established its reputation through robust production capabilities, innovative processing technologies, stringent product certifications, and a commitment to sustainable manufacturing.
1. High Production Capacity and Scale
Youfa Group operates 8 production bases across China (e.g., Tianjin, Hebei, Jiangsu, and Yunnan), equipped with over 300 production lines that collectively achieve an annual output exceeding 20 million tons of steel pipes. The company's Schedule 40 carbon steel pipes, a core product line, benefit from this massive scale, ensuring stable supply and cost efficiency for large-scale oil, gas, and infrastructure projects.
Market Leadership: Youfa has ranked first in China’s welded steel pipe sales for 19 consecutive years, with a domestic market share of approximately 35% for hot-dip galvanized pipes.
Global Reach: Products are exported to over 100 countries, including Southeast Asia and the Middle East, supported by ongoing plans to expand overseas production bases.
2. Comprehensive Specifications and Customization
Diameter Range: From DN15 to DN1200, accommodating applications in oil and gas transmission, structural support, and underground utilities.
Customization: Optional coatings (e.g., epoxy resin, polyethylene) enhance corrosion resistance for harsh environments like offshore drilling or chemical processing.
3. Advanced Processing and Quality Control
Innovative Manufacturing: The company holds 188 authorized patents, including automated pipe bundling machines and energy-efficient galvanizing systems, which optimize production efficiency and reduce costs.
CNAS Certified Labs: Five national-recognized laboratories conduct over 200 quality tests, including hydrostatic pressure, chemical composition analysis, and non-destructive testing, ensuring compliance with ASTM A53, GB/T 3091, and other international standards.
Traceability System: Each pipe is assigned a unique identification code for lifetime quality tracking, reinforcing accountability and reliability.
4. Industry-Leading Certifications and Standards
National Green Product Certification: Multiple Youfa products, including Schedule 40 pipes, are certified as "Green Design Products" by China's Ministry of Industry and Information Technology, highlighting their environmental and performance excellence.
International Recognition: Certifications such as API 5L and ISO 9001 further validate their suitability for global oil and gas projects.
5. Commitment to Sustainability and Green Manufacturing
Green Factories: Three of its production bases are designated "National Green Factories", with Jiangsu Youfa Pipe Co., Ltd. receiving the "Green Factory" title in 2024 for its wastewater recycling systems and reduced carbon emissions.
Clean Production Initiatives: Investments exceeding RMB 22 million in 2023 improved waste management and energy efficiency, reducing acid mist emissions and hazardous waste generation.
Post time: Aug-26-2025