EN10255 Galvanized Steel Pipes

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BS EN 10255:2004 Hot Dipped Galvanized Steel Tube

Non-alloy steel tubes suitable for welding and threading. Technical delivery conditions

Size:1/2-6inch

BS EN 10255:2004 Galvanized Steel Pipes Wall Thickness

• ±10%. for M and H series & Type L;

• -8% with the plus tolerance limited by the mass tolerance, for Types L1 and L2.

BS EN 10255:2004 Galvanized Steel Pipes Weight

• ±7.5% on bundles of 10 tons or more, for M and H series and Type L;
• +10%, -8% on individual tubes for Types L1 and L2.

BS EN 10255:2004 Galvanized Steel Pipes Straightness

• Straightness shall not exceed 0.002 L.

BS EN 10255:2004 Galvanized Steel Pipes

The markings should be placed at least once within one meter of one end of the tube, and the tubes shall be marked with the following information by suitable and durable methods:

• The name or trademark of the manufacturer;
• The serious symbol (H or M) and the type (L, L1, or L2);
• The symbol of the manufacturing process (S or W)

Colors can be a helpful way to organize and identify different objects, and this is especially true when it comes to tubes. Tubes are often used in a variety of settings, from construction sites to laboratories, and they come in a wide range of sizes and materials. While each type of tube has its own unique properties, they all need to be marked so that they can be easily identified. The manufacturer may opt to use color coding instead of series or type markings. This will make it easy to quickly identify the different types of tubes, saving time and preventing confusion.

BS EN 10255:2004 Galvanized Steel Pipes

The following information shall appear on the label of each bundle:

• The name or trademark of the manufacturer;
• The standard code EN 10255;
• The symbol of the manufacturing process (S or W)
• The D (outside diameter) or R (thread size);
• The series or type or specified wall thickness.

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Chemical Structure of  BS EN 10255:2004 Galvanized Steel Pipes

The exterior and interior surfaces of the pipe must be smooth, without fissures, cracks, overlay of materials, non-metallic inclusions. Small scratches, bumps, dents, a thin layer of welding cinder or traces after clearing defects resulting from the production process are allowed, avoiding wall thickness to fall under the minimal allowed limits.

The welding seam needs to be compact and continuous, without fissures or other defects that reduce the rezistence of the seam under the rezistence of the base metal. The exterior ledge of the welding seam is removed. Thickening of the seam within the range of permitted diameter limits is allowed. The interior burr of the welding seam is not removed. Unevenness on the margins of the metal strip in the welding seam is not allowed. Extremities of the pipe must be cut perpendicularly on its' axis. A burr on the pipe ends resulting from the tehnologic process of cutting is allowed. Deformation of pipe ends is not allowed.

BS EN 10255:2004 Galvanized Steel Pipes must have an adherent and continuous layer of zinc on the interior and exterior surface. The covering with zinc of both surfaces or only the inner surface is achieved by submersion in a molten zinc bath. Local roughness and thickening of the zinc layer is allowed, mainly on a portion of 80 mm from the end of the pipe, where the blowing of the tubes is executed. The thickness of the zinc layer on the outer surface must be thinner than the layer of the inner surface. The thickness of the interior surface must be approximately 56 µm. The linear mass of galvanised pipes is calculated by adding the mass of the coresponding minimal thickness of the zinc layer to the mass of the pipes.

BS EN 10255:2004 Galvanized Steel Pipes Delivery conditions

The steel sections are not treated after the cold-rolling. On the external and internal surface, there can appear tracks of emulsion, respectively smaller tracks of oxidation. On the external surfaces of the sections there is applied an oil covering, that assures a provisional protection against corrosion. At request one can renounce to this protection covering.