U-Bolt

A U-bolt is a small steel fastener with wide-ranging applications in construction and piping systems. Structurally, it is a threaded bolt bent into a U-shape with threads on both ends. U-bolts are widely used for supporting pipelines, especially in the oil and gas industries, and for securing structural components in residential, commercial, and industrial projects.

U-Bolt

Key Advantages of U-Bolts

  • Fast and easy installation and assembly

  • Reusability

  • No requirement for skilled labor

  • Cost-effective relative to function and capabilities

  • No restrictions regarding connected components

Types of U-Bolts

U-bolts are categorized by shape into three types: round U-bolts, semi-round U-bolts, and square (box) U-bolts. They can also be classified by the material from which they are made. Common materials include:

  • Carbon steel

  • Stainless steel (304 and 316 grades)

  • Brass

  • Copper

In addition to selecting a suitable base material for the intended environmental conditions, U-bolts can be customized with advanced anti-corrosion coatings upon request. Among these, zinc flake coating stands out as a highly effective solution, offering 7 to 10 times greater durability than conventional coatings. Despite its minimal thickness, zinc flake provides superior corrosion and rust resistance. At Shahin Felez Sepahan, a leading knowledge-based steel manufacturing company, U-bolts are treated with high-quality zinc flake coating using state-of-the-art equipment.

Standard Sizing and Dimensions of U-Bolt

U-bolt sizes are defined based on the nominal pipe size they are designed to support. For example, a 1-inch pipe will have a U-bolt with a 1-inch inner diameter, although the outer diameter of the pipe will be slightly larger. This sizing system can sometimes be confusing for buyers, particularly when selecting the correct size for external pipe dimensions. Therefore, technical consultation with the sales engineers at Shahin Felez Sepahan is highly recommended.

specifications of U-Bolt

A D= Nominal of Tube D= Effective of Tube H1 H2 B Thread
D		 E Weights in KG
PER 1000 P.
(without nut & washers)
MM INCH METRIC INCH
IN MM		 METRIC
IN MM		 FORM A FORM B
30 3/4 20 26/9 25 70 28 40 10 40 94 68
38 1 25 33/7 30 76 31 40 10 48 105 77
46 1  1/4 32 42/4 38 86 37 50 10 56 120 90
52 1  1/2 40 48/4 44/5 92 40 50 10 62 129 97
64 2 50 60/3 57 109 49 50 12 76 222 168
82 2  1/2 65 76/1 76/1 125 57 50 12 94 259 198
94 3 80 88/9 88/9 138 66 50 12 106 288 224
120 4 100 114/3 108 171 60 16 136 640
148 5 125 139/7 133 191 60 16 164 727
176 6 150 168/3 159 217 60 16 192 834
202 7 175 193/7 191 249 60 16 218 958
228 8 200 219/1 216 283 70 20 248 1698
282 10 250 273 267 334 70 20 302 2028
332 12 300 323/9 318 385 70 20 352 2350
378 14 350 368 355/6 435 70 24 402 3820
428 18 400 419 406/4 487 40 24 452 4290
530 500 521 508 589 70 24 554 5220

Key Factors to Consider When Purchasing U-Bolts

The stability and strength of a structure or piping system directly depend on the correct selection of U-bolts. When chosen with careful consideration of the application, they can significantly enhance safety and performance. Key parameters include:

  • Environmental conditions (humidity, salinity, temperature, etc.)

  • Material of the U-bolt (e.g., stainless steel, carbon steel)

  • Dimensions (usually measured in millimeters – expert consultation is advised)

  • Mechanical properties and applicable manufacturing standards

Applications of U-Bolts

U-bolts are essential components across a wide range of residential and industrial applications. Their simplicity and affordability make them indispensable for:

  • Securing pipes, cylindrical, and semi-cylindrical objects

  • Pipe rack systems in oil, gas, and petrochemical industries

  • Construction and civil engineering

  • Automotive manufacturing

  • Plumbing systems

  • Marine applications

  • Power and energy infrastructure

  • Agricultural machinery

Why Choose Shahin Felez Sepahan?

Shahin Felez Sepahan is a well-established, knowledge-based enterprise in the steel manufacturing sector, known for its high-quality products and competitive pricing. The company operates Iran’s first and only large-part zinc flake coating line, enabling rapid turnaround without the need to ship parts to a third-party coating plant.

The zinc flake coating applied at Shahin Felez Sepahan delivers over 2,000 hours of salt spray resistance, meeting the highest durability standards. In addition, customers can send in samples to receive free coating trials, ensuring satisfaction before placing bulk orders. The company is also equipped with an in-house salt spray testing laboratory, offering professional-quality inspection services under expert supervision. If you need consultation on choosing the right U-bolt for your project, feel free to contact our expert at your convenience. What’s more, you can place your order through a phone call or send us your request through the company’s official social media.

Frequently Asked Questions

1. When is it necessary to use anti-corrosion coatings for U-bolts?
In corrosive environments, such as humid, salty regions or petrochemical facilities, protective coatings are essential. Neglecting to apply these coatings can significantly reduce the lifespan of the product and result in costly damage.

2. How should I determine the correct U-bolt size?
U-bolt size (measured in millimeters) is based on the external diameter of the pipe or object being secured. For accurate sizing, it’s advisable to consult with Shahin Felez Sepahan’s technical sales experts before purchase.