ALLLAND Boiler Steel Pipe Supply
Welcome to ALLLAND Steel Pipe. We are a professional steel pipe manufacturer specializing in structural steel pipes for Ringlock Scaffolding systems. Our products offer excellent strength, stability, and durability, making them widely used in construction projects, bridge engineering, and various industrial applications. With advanced production equipment and a rigorous quality control system, we provide reliable scaffolding pipe solutions to customers worldwide.
Alllandsteel is a steel pipe manufacturer based in China with 25 years of experience.
The facility spans 22,000 square meters, represents a RMB 700 million investment, and operates four production lines (JCOE, ERW, SMLS, SSAW) alongside five coating lines.
With an annual production capacity of 250,000 tons, the factory covers specifications ranging from Ø406 to Ø1524 and holds multiple international certifications (API/ASTM/EN/ISO/JIS). Focused on steel pipes, creating value for you!
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Ringlock Scaffolding is a modular scaffolding system designed for large-scale projects with significant weight-bearing requirements. Each module connects via wedge-lock pins, forming a complete, continuous, and stable structure. The core structure of Ringlock Scaffolding typically consists of Standard, Ledger, Diagonal Brace, Base Jack, and Steel Plank components. These elements provide Ringlock Scaffolding with high load-bearing capacity, strong structural stability, and excellent lateral resistance. Ringlock Scaffolding generally utilizes carbon steel tubing, which offers fast production processing, high hardness, and excellent perforation properties, making it the optimal material choice for scaffolding systems. Below is a detailed introduction to Ringlock Scaffolding, along with the advantages of our company’s steel pipes and modular products.
O.D.:
48.3 mm / 60.3 mm
W.T.:
2.75 mm – 4.0 mm
Length:
0.5 m – 3.0 m
Material::
Q235/ Q345/S235/ S355
Standard::
0.5 m – 3.0 m, primarily for load-bearing, forming the main framework of the entire system.
Ledger:
0.6 m – 2.4 m, used to connect two uprights.
Diagonal.
Diagonal Brace:
0.6 m – 2.4 m, forming diagonal support rods for the triangular structure.
Surface:
Black Steel, Painted, Pre-Galvanized, Hot Dip Galvanized
Primary load-bearing components responsible for supporting structural and construction loads. With disc joints welded to the upright poles, multiple ledgers and diagonals can be connected via a single disc joint, ensuring scaffold stability.
Connects two uprights to form a horizontal support, secured with wedge pins. Adjustable length provides flexibility. The horizontal support ensures overall structural levelness.
Diagonally supports between ledgers and uprights, forming stable triangular spaces. Effectively increases system rigidity, resists lateral forces, and ensures stable construction in swaying environments.
Mounted at the base of the upright pole to adjust the scaffolding’s balance. Its wide base plate also distributes load, adapting to uneven ground.
A platform for construction personnel, capable of bearing both personnel and construction loads. The surface of this plank requires anti-slip treatment to ensure safety during elevated work.
Construction Engineering
One of the most common application areas for Ringlock Scaffolding, with typical load-bearing capacity and erection parameters as follows:
Upright spacing: 1.5 m – 2.4 m
Working platform load capacity: 2.0 – 5.0 kN/m²
Maximum construction height: Can exceed 100 m
Bridge Engineering
Ringlock Scaffolding is primarily used for bridge formwork support during construction and for subsequent bridge maintenance. Given the high load-bearing requirements for bridges:
Steel tube outer diameter: 48.3 mm
Wall thickness: 3.2 mm – 4.0 mm
This configuration maximizes safety assurance.
Tunnel Engineering
Primarily used for stacking construction materials and installing equipment during tunnel construction, as well as for subsequent equipment maintenance. The scaffolding must feature flexible installation, compact equipment, and rapid deployment capabilities.
| Standard | Region | Typical Steel Grade | Yield Strength | Typical Application |
| ASTM A53 | USA | Grade A / Grade B | ≥ 240 MPa (Grade B) | Welded carbon steel pipes used in scaffolding and general structural applications |
| ASTM A500 | USA | Grade B / Grade C | ≥ 315 MPa (Grade B)≥ 345 MPa (Grade C) | Structural steel pipes used for scaffolding frames and construction structures |
| EN 10219 | Europe | S235 / S275 / S355 | ≥ 235 MPa (S235)≥ 355 MPa (S355) | Cold formed structural hollow sections used in construction and scaffolding |
| EN 39 | Europe | S235 | ≥ 235 MPa | Standard steel tubes specifically used for scaffolding systems |
| BS 1139 | United Kingdom | Structural Carbon Steel | ≥ 235 MPa | Steel tubes used for scaffolding systems and temporary structures |
| JIS G3444 | Japan | STK400 / STK490 | ≥ 235 MPa (STK400)≥ 315 MPa (STK490) | Structural carbon steel pipes used in scaffolding and building structures |
