S275JR Welded Steel Pipes 20mm×20mm & 30mm×30mm for Door/Window Applications - Factory Direct Pricing
Price:
negotiable
MOQ:
Negotiable
Delivery Time:
Negotiable
Brand:
Zhengde Metal
Product Description
Industrial Welded Steel Pipes Overview
Welded steel pipes are manufactured by welding steel plates or strips after forming, typically in 6-meter lengths. These pipes feature simple production processes, high efficiency, diverse specifications, and lower equipment investment compared to seamless alternatives.
Product Specifications & Standards
Available Dimensions
Standard sizes include 20mm×20mm and 30mm×30mm square profiles, with various wall thickness options.
Material Grades
Common materials: Q235A, Q235C, Q235B, 16Mn, 20#, Q345, L245, L290, X42, X46, X60, X80, S275JR, and various stainless steel grades including 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9.
Technical Standards
GB/T3091-2008: Low-pressure fluid transportation (water, gas, oil)
GB/T14291-2006: Mining fluid transportation
GB/T12770-2002: Mechanical structures and components
GB/T12771-1991: Low-pressure corrosive media transport
Pressure Rating Specifications
| DN Size | Welded Pipe (Ordinary) | Welded Pipe (Thickened) | Seamless Pipe | Spiral Welded Pipe |
|---|---|---|---|---|
| DN15 | 21.3×2.75 (1.25 kg/m) | 21.3×3.25 (1.44 kg/m) | ---- | ---- |
| DN20 | 26.8×2.75 (1.63 kg/m) | 26.8×3.5 (2.01 kg/m) | ---- | ---- |
| DN25 | 33.5×3.25 (2.42 kg/m) | 33.5×4 (2.91 kg/m) | 32×3.5 (2.46 kg/m) | ---- |
| DN32 | 42.3×3.25 (3.13 kg/m) | 42.3×4 (3.77 kg/m) | 38×3.5 (2.98 kg/m) | ---- |
| DN150 | 165×4.5 (17.81 kg/m) | 165×5.5 (21.63 kg/m) | 159×4.5 (17.14 kg/m) | 168×5 (20.1 kg/m) |
| DN300 | ---- | ---- | 325×8 (62.54 kg/m) | 325×7 (54.9 kg/m) |
Production Methods & Types
Welding Processes
Arc Welded Pipes
Resistance Welded Pipes (High/Low Frequency)
Gas Welded Pipes
Furnace Welded Pipes
Weld Configuration
Straight Seam Welded Pipes (LSAW/ERW)
Spiral Welded Pipes (SSAW)
Key Applications
Water supply and drainage systems
Petrochemical and chemical industries
Power generation and agricultural irrigation
Urban construction and infrastructure projects
Structural components for buildings, bridges, and ports
Manufacturing Advantages
Quality Assurance
Strict production and inspection processes ensure compliance with all applicable standards.
Competitive Pricing
Factory-direct sales with competitive market pricing and volume discounts.
Reliable Service
Secure transactions and comprehensive after-sales support for long-term partnerships.
All welded pipes can be galvanized for enhanced corrosion resistance. Contact us for custom specifications and bulk order pricing.
Similar Products
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Shandong Zhengde Metal Manufacturing Co., Ltd
Location
Binzhou, Shandong, China 256600
Contact Person
Virtue