Project Description
Company Overview:
Our company is equipped with two sets of SAWL (Submerged Arc Welded Longitudinal) large-diameter steel pipe production lines using the RBE (Roll-Bend-Expand) method. We have an annual production capacity of 300,000 tons of large-diameter longitudinal double-sided submerged arc welded steel pipes.
Product Applications:
Our large-diameter SAWL steel pipes are designed for a wide range of applications, including:
– Slurry transportation in mining operations
– Urban water supply systems
– Sewage treatment projects
– Heat network renovation projects
– Steel pipe piling
– Bridge construction
– Steel structures and frameworks
Product Specifications:
– Diameter Range: Ф914mm ~ Ф3251mm
– Wall Thickness: 9.53mm ~ 40mm
Steel Grades:
1. Pipeline Steel: L245/B ~ L555/X80
2. Carbon Steel: Q235 ~ Q355, C60, C65, etc.
Manufacturing Standards:
Our products comply with various national and international standards, including:
– GB/T 9711-2017
– API SPEC 5L (46th Edition)
– GB/T 3091-2015
– SY/T 5037-2018
– Other relevant domestic and international standards for similar products
– Higher standards as required
Key Features and Benefits:
1. Extra-Large Diameter Capability: Able to produce pipes up to 3251mm in diameter, suitable for high-volume transmission projects
2. Versatility: Applicable across various industries and infrastructure projects
3. High-Strength Options: Available in high-grade steels up to X80 for demanding applications
4. Thick Wall Options: Wall thickness up to 40mm for high-pressure and heavy-duty applications
5. Quality Assurance: Manufactured using the RBE method, ensuring superior pipe properties and weld integrity
6. Customization: Ability to meet specific project requirements and standards
7. High Production Capacity: Annual output of 300,000 tons ensures ability to meet large-scale project demands
Our large-diameter SAWL steel pipes, produced using the RBE method, offer a robust and efficient solution for various large-scale infrastructure and industrial projects. The RBE manufacturing process ensures high-quality welds, excellent roundness, and superior mechanical properties.
These pipes are particularly well-suited for applications requiring large-volume transmission capabilities, such as major water supply projects, large-scale slurry transportation in mining operations, and significant urban infrastructure developments. The combination of large diameters and high-strength steel grades makes these pipes ideal for projects where both capacity and durability are critical factors.
With our advanced manufacturing capabilities and strict adherence to international standards, we can provide high-performance, large-diameter pipes tailored to meet the specific needs of our customers across different sectors, from municipal utilities to industrial applications and major construction projects.
SAWL large-diameter pipe data
RBE (roll-bend-expand) forming gives a rounder pipe than press-bending at these diameters, which matters when the pipe is concrete-coated or lined and the coating thickness has to be uniform. It is the route used for water transmission, piling and bridge casing.
| Product | Longitudinal double-sided submerged arc welded (SAWL) steel pipe, RBE formed |
| Diameter range | 914 mm – 3,251 mm |
| Wall thickness | 9.53 mm – 40 mm |
| Length | 6 – 12 m, or to project specification |
| Steel grades | API 5L Gr. B to X80; EN 10219 / EN 10217 grades on request |
| Ends | Bevel to API 5L / project spec; plain or with spigot and socket on request |
| Testing | 100 % UT or RT on the longitudinal seam, hydrostatic test, dimensional and ovality check |
| Coating | 3PE, 3PP, FBE, epoxy or bare, as specified |
| Certificate | EN 10204 3.1; API monogram where the order requires it |
Pipe of this diameter is a logistics decision before it is a metallurgy decision: state the transport mode, the maximum length that can be handled at site, and whether coating is applied at the mill or locally.