The steel pipe specifications under the British Standard are mainly divided into two categories, one is formulated according to the metric system specifications, and the other is formulated according to the imperial system specifications. In the steel pipe specifications formulated according to the metric system specifications, the diameter unit is millimeters and the wall thickness unit is millimeters or inches; in the steel pipe specifications formulated according to the imperial system specifications, the diameter unit is inches and the wall thickness unit is SWG or BWG.
The manufacturing standards for steel pipes under British standards
Material Specifications
Typically have specific requirements for the chemical composition of steel, emphasizing elements such as carbon, manganese, silicon, and others to achieve a balance of strength, ductility, and corrosion resistance. Different applications may have distinct grades of steel specified.
Dimensions and Tolerances
Define precise outer diameter, wall thickness, and length dimensions with specific tolerances. Ovality and straightness requirements are carefully specified to ensure compatibility with fittings and ease of installation.
Manufacturing Processes
Regulate welding processes strictly, specifying the type of welding method (e.g., arc welding, gas welding), welding parameters, and quality control measures. Seamless pipe manufacturing processes like hot rolling, cold drawing, and extrusion are also well-defined to ensure quality and integrity.
Quality Control and Testing
Require visual inspection for surface defects, weld quality, and overall appearance. Non-destructive testing methods such as ultrasonic testing, radiographic testing, and magnetic particle testing are commonly used to detect internal defects. Hydrostatic testing is performed to check pressure resistance.
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Common steel pipe specifications under British Standard
BS 1139 steel pipe is primarily used welded steel pipe for scaffolding and access equipment.It is formulated according to metric specifications with diameters from 33.7 mm to 60.3 mm and wall thicknesses from 2.9 mm to 4.0 mm.
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BS1387 steel pipe
BS1387 steel pipe is a commonly used welded steel pipe for gas, water supply and drainage. It is formulated according to metric specifications with diameters from 15mm to 150mm and wall thicknesses from 1.6mm to 5.4mm.
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BS EN 39 Steel Pipe
BS EN 39 steel pipe is mainly used welded steel pipe for tube and coupler scaffolds.It is formulated according to metric specifications with diameters from 48.3 mm to 60.3 mm and wall thicknesses from 2.9 mm to 4.0 mm.
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BS EN 10219 Steel Pipes
BS EN 10219 steel pipe is a welded structural steel pipe for use in the construction and mechanical fields. It is formulated according to metric specifications with diameters from 21.3mm to 219.1mm and wall thicknesses from 1.5mm to 8.0mm.
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