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About us
Tianjin lefin Industrial
TIANJIN LEFIN STEEL GROUP containing Tianjin lefin Industrial Co.,Ltd. 、Tianjin lefin steel import & export Co.,Ltd and Tianjin Shengqifeng International Trading Co., Ltd. -
Products
Steel Pipe Processing
Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard -
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Service Capability
Guarantee Quality
Our steel pipes are suitable for oil, natural gas, shipbuilding, chemical industry, water conservancy, electrical, steel structure, construction and other related fields.
Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard
Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard
Has rich experience in steel pipe processing, can be customized according to customer requirements according to the drawing and sample processing, assist in the development of new products.
Nauru BS 1139 SCAFFOLDING PIPE
Category:
Product Description
BS 1139 is the standard for scaffolding steel pipes and fittings in the United Kingdom. It is divided into several parts and specifies in detail the requirements for materials, dimensions, manufacturing and testing to ensure the safety and reliability of the scaffolding system. The following is a detailed introduction:
1. Standard Composition
- BS 1139-1: Covers the specifications of scaffolding steel pipes, including dimensions, materials and manufacturing requirements.
- BS 1139-2: Stipulates the performance and design specifications of system scaffolding (such as portal type and frame type).
- BS 1139-3: Special requirements for coupler-type steel pipes, such as strength tests of connectors.
2. Steel pipe specifications
- Outer diameter and wall thickness: The standard outer diameter is 48.3 mm (close to 2 inches), and common wall thicknesses are 3.2 mm (light type) or 4.0 mm (heavy type). In some scenarios, a 5.0 mm wall thickness is used.
- Length: Usually 6.4 meters (21 feet), other lengths can also be customized.
- Material: S355 (yield strength 355 MPa) or S275 steel is mostly used to ensure high strength and durability.
- Surface treatment: Hot-dip galvanizing (zinc layer thickness ≥85μm) for anti-corrosion and suitable for harsh environments.
3. Manufacturing and Testing
- Manufacturing process:
Cold drawing or hot rolling forming to ensure dimensional accuracy; The ends need to be cut flat or chamfered for connection.
- Mechanical performance test:
- Tensile test: Verify tensile strength and elongation.
- Flattening test: To detect the deformation capacity of steel pipes under pressure.
- Bending test: To evaluate ductility and toughness.
- Galvanized coating test: Corrosion resistance is inspected through salt spray test or magnetic thickness gauge.
4. Accessories and Connections
- Fastener types: Right-angle fasteners, swivel fasteners, butt fasteners, etc., which need to comply with the anti-slip and anti-torsion standards of BS 1139-3.
- Connection strength: The fastener must withstand a torque of at least 1.1 kN·m, and the anti-slip load of a single fastener should be ≥7 kN.
5. Safety and Design Loads
- Safety factor: Based on the limit state design method, the load component coefficient is usually taken as 1.5.
- Load-bearing capacity: The designed load of a single vertical pole can reach 20 kN (static load) or 15 kN (dynamic load), depending on the wall thickness and connection method.
6. Association with other standards
- European Standard: Some parts of BS 1139 have been integrated into EN 12811 (Temporary Structural Standard) and EN 39 (Specification for Scaffolding Steel tubes).
- International Comparison:
- United States (ANSI/ASSE A10.8) : Similar load requirements, but with greater emphasis on the overall test of the system scaffolding.
- China (GB/T 13793) : The outer diameter and wall thickness are similar, but the material standards (such as Q235) are slightly different.
7. Application Fields
- Construction site: Used for exterior wall construction, support formwork, and safety protection net erection.
- Industrial maintenance: Construction of equipment inspection platforms and temporary passageways.
- Event facilities: Large temporary structures such as stages and viewing stands.
Address: Hengtai Road,Daqiuzhuang Town,Jinghai County,Tianjin,China
Mob: +8615122229899(whatspp)
Phone: +86 22 58171905
Fax: +86 22 58171902
E-mail:info@lefinsteel.com
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