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Galvanized U-Bolts & Double-Headed Bolts - Custom Factory Products from China Suppliers
| Nominal diameter d |
30 | 38 | 46 | 52 | 64 | 82 | 94 | 120 | 148 | ||
| d1 | 25~26.9 | 30~33.7 | 38~42.4 | 44.5~48.3 | 57~60.3 | 76.1 | 88.9 | 108~114.3 | 133~139.7 | ||
| d1 | Suitable for pipe size | Metric system | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 |
| d1 | English | 3/4" | 1" | 1 1/4" | 1 1/2" | 2" | 2 1/2" | 3" | 4" | - | |
| b ① | 40 | 40 | 50 | 50 | 50 | 50 | 50 | 60 | 60 | ||
| ds | 10 | 10 | 10 | 10 | 12 | 12 | 12 | 16 | 16 | ||
| d3 | M10 | M10 | M10 | M10 | M12 | M12 | M12 | M16 | M16 | ||
| L ① | 70 | 76 | 86 | 92 | 109 | 125 | 138 | - | - | ||
| L1 | 28 | 31 | 37 | 40 | 49 | 57 | 66 | 171 | 191 | ||
| n | 40 | 48 | 56 | 62 | 76 | 94 | 106 | 136 | 164 | ||
| 100 piece weight (steel)≈ kg | Type A | 9.4 | 10.5 | 12 | 12.9 | 22.2 | 25.9 | 28.8 | 64 | 72.7 | |
| Type B | 6.8 | 7.7 | 9 | 9.7 | 16.8 | 19.8 | 22.4 | - | - | ||
| Nominal diameter d |
176 | 202 | 228 | 282 | 332 | 378 | 428 | 530 | ||
| d1 | 159~168.3 | (191)~193.7 | 216~219.1 | 267~273 | 318~323.9 | 355.6~368 | 406.4~419 | 508~521 | ||
| d1 | Suitable for pipe size | Metric system | 150 | -175 | 200 | 250 | 300 | 350 | 400 | 500 |
| d1 | English | - | - | - | - | - | - | - | - | |
| b ① | 60 | 60 | 70 | 70 | 70 | 70 | 70 | 70 | ||
| ds | 16 | 16 | 20 | 20 | 20 | 24 | 24 | 24 | ||
| d3 | M16 | M16 | M20 | M20 | M20 | M24 | M24 | M24 | ||
| L ① | - | - | - | - | - | - | - | - | ||
| L1 | 217 | 249 | 283 | 334 | 385 | 435 | 487 | 589 | ||
| n | 192 | 218 | 248 | 302 | 352 | 402 | 452 | 554 | ||
| 100 piece weight (steel)≈ kg | Type A | 83.4 | 95.8 | 169.8 | 202.8 | 235 | 382 | 429 | 522 | |
| Type B | - | - | - | - | - | - | - | - | ||
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The purpose, shape, and application areas of U-bolts include:
U-bolt usage: mainly used for water pipes and other fixed pipe fittings or plates, such as the construction and installation of automotive steel plate springs, mechanical connections, vehicles, ships, bridges, tunnels, railways, etc.
Main shapes: semi-circular, right angled square, triangle, oblique triangle, etc.
The application areas of U-bolts are as follows: U-bolts are usually used in trucks to stabilize car chassis and frames. For example, leaf springs are connected by U-bolts. U-bolts have a wide range of applications, such as construction and installation, mechanical component connections, vehicles, ships, bridges, tunnels, railways, etc.
In addition, U-bolts have been widely used in modern industrial fields, easy to install, maintain, and replace, and have seismic performance and anti loosening function. When selecting and using U-bolts, factors such as material, density, strength, color, and compressive strength need to be considered to ensure that they can adapt to specific usage environments and requirements.
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Frequently Asked Questions
Q
What is a DIN 3570 U-bolt primarily used for?
DIN 3570 U-bolts are primarily used to fix and support water pipes and other pipe fittings or structural plates. Common applications include automotive steel plate spring installation, construction, mechanical connections, vehicles, ships, bridges, tunnels, and railways.
Q
What shapes are available for U-bolts?
U-bolts are available in several main shapes to suit different applications: semi-circular (round bend), right-angled square, triangular, and oblique triangular. The semi-circular type is the most widely used for clamping round pipes and tubes.
Q
What is the difference between Type A and Type B U-bolts in the DIN 3570 standard?
Type A U-bolts are heavier-duty and designed for larger load-bearing requirements, while Type B U-bolts are lighter versions for smaller pipe sizes. For example, at a nominal diameter of 30mm, Type A weighs approximately 9.4 kg per 100 pieces, whereas Type B weighs approximately 6.8 kg per 100 pieces. Note that Type B is not available for larger nominal diameters (120mm and above).
Q
What materials are DIN 3570 U-bolts typically made from?
DIN 3570 U-bolts are typically manufactured in steel, and the weight specifications provided in the standard are based on steel material. When selecting U-bolts, it is important to evaluate material properties such as density, tensile strength, and corrosion resistance to ensure suitability for the specific environment and application requirements.
Q
How do I select the correct U-bolt size for my pipe?
To select the right U-bolt, match the nominal diameter (d) to your pipe's outer diameter (d₁) as listed in the specification table. Both metric and English pipe size equivalents are provided for reference. For example, a nominal diameter of 52mm fits metric DN40 pipes (1½" English equivalent) and uses M10 thread bolts with a b-dimension of 50mm.
Q
What factors should be considered when installing U-bolts?
When installing U-bolts, consider the following key factors: choose materials compatible with the operating environment (e.g., corrosion-resistant grades for outdoor or marine use); apply correct torque to prevent loosening; select the proper size to avoid stress concentration on the pipe; and use rubber pads or cushioning to protect the pipe surface. DIN 3570 U-bolts also offer seismic performance and anti-loosening function when properly installed.