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Steel pipe core is widely used in aluminum processing industry. It is an important equipment to ensure the quality and production efficiency of aluminum coils. It is an essential auxiliary parts for aluminum foil production enterprises. The straightness, ovality, tolerance, surface quality and other factors of steel pipe core directly affect the quality of aluminum foil stripping and coiling. Our company specializes in the production of various types of steel pipe cores, it can also be customized according to customer requirements.
Index requirements | ||||||
Metal material | Cold drawn or cold rolled welded steel pipe | German | ||||
Mechanical properties | Tensile strength：R2≥460Mpa，Elongation：A≥6% | / | ||||
ID/OD (mm) | 76. 2/80. 2 | 150/158 | 150/162 | 152.4/160.4 | 200/212 | 150/300 |
ID tolerance (mm) | +0.1 | +0.60 | +0.60 | +0.60 | +0.80 | +0.60 |
-0.1 | -0.20 | -0.20 | -0.00 | -0.00 | -0.00 | |
Wall thickness and tolerance (mm) | 2.0±0.1 | 4.0±0.1 | 6.0±0. 1 | 4.0±0.1 | 6.0, +0.4 | 75±0.1 |
If other wall thickness steel core is used, the thickness tolerance shall be ±5%. | ||||||
OD tolerance(mm) | (0,+0.10) | (+0.45,+0.60) | （+0.40,+0.60) | (+0. 15,+0.30) | (+0.20,+1.00) | (0,+0.8) |
Ovality(mm) | ＜0.20 | ＜0.20 | ＜0.20 | ＜0.20 | ＜0.20 | ＜0.20 |
Straightness(mm/m) | ＜0.50 (All finished pipe cores cut into required lengths are in accordance with this standard) | ＜0.50 | ||||
Length and tolerance (mm) | 6.5 meters > length > 6 meters, length tolerance in the same batch (0, +50) | Specification length±1mm | ||||
Weight tolerance | The allowable tolerance of the weight in same batch is ±5%t | |||||
Surface roughness(μm) | Inner wallRa≤12.5，outer wall≤3.2 | |||||
Appearance quality | 1. The inner and outer surfaces of the steel pipe core should be smooth, without bumps, dents, or processing marks that affect use. Local pits, abrasions, and small scratches are allowed within 30mm of the edge of the tube core, and the depth should be ≤0.05mm. 2.The surface of the pipe core must be clean, without iron filings, rust, dust, water stains, oil stains or other dirt that affects use. 3.The end faces of the finished steel pipe should be perpendicular to the axis of the steel pipe, the cut should be free of burrs, and the end faces should be flush. 4.The pipe core is not allowed to be deformed during use. | |||||
Package quality | The inner and outer surfaces of the steel pipe core should be coated with pure anti-rust oil before bundling. The bundled steel pipe core must be wrapped with moisture-proof paper,woven bags or plastic bags before bundling, and the bundling position should be controlled at the two ends as much as possible. | |||||
