| Customization: | Available |
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| Material: | Carbon Steel |
| Type: | Round Head |
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Fasteners are essential components of almost every industrial and construction project. They are used to join different parts together and play a crucial role in ensuring the safety and reliability of the overall structure. Xylan coated B7 studs, 2H nuts, and B16.5 flange connection fasteners are some of the most commonly used fasteners in various industries. Let's take a closer look at each of these components.
B7 Studs:
B7 studs are high-strength, heat-treated steel fasteners that are commonly used in high-pressure and high-temperature applications. These studs are manufactured from alloy steel, ensuring exceptional strength and durability. These fasteners are commonly employed in flanged joints to ensure the secure connection of two distinct components. B7 studs are available in different diameters, lengths and finishes to suit different applications.
One of the key benefits of B7 studs is their ability to withstand corrosion and high temperatures. Coating with materials such as Xylan is often used to provide additional protection against corrosion and wear. Xylan coating is a fluoropolymer coating that is renowned for its exceptional anti-corrosion properties. The product's non-stick surface is characterised by its smooth texture and resistance to friction, wear and chemical degradation.
2H Nuts:
2H nuts are heavy hex nuts that are used in conjunction with B7 studs. These nuts are manufactured from high-strength materials and are designed to provide a secure and tight fit. These hex nuts have six sides and are larger than regular hex nuts, making them ideal for high-pressure applications. 2H nuts are frequently used in conjunction with B7 studs to ensure a secure and reliable joint.
As with B7 studs, 2H nuts are available in a range of sizes and finishes to suit different applications. Coating with materials such as Xylan is often used to provide additional protection against corrosion and wear. Xylan coating is also used to provide a lubricating effect that facilitates the easy tightening and removal of nuts.
B16.5 Flange Connection:
B16.5 flange connections are a type of fastener that is used to join two separate parts together. These connections are widely utilised in piping systems, where they are engineered to ensure a secure and reliable joint. B16.5 flange connections are available in different sizes and classes to suit different applications. These knives are typically crafted from materials such as carbon steel, stainless steel, or alloy steel, depending on the specific requirements of the task.
One of the key benefits of B16.5 flange connections is their capacity to ensure a watertight joint. The product has been designed to provide a tight seal that prevents leaks and reduces the risk of environmental contamination. B16.5 flange connections are frequently used in conjunction with B7 studs and 2H nuts to provide a secure and reliable joint.
Conclusion:
In conclusion, Xylan coated B7 studs, 2H nuts, and B16.5 flange connection fasteners are essential components of various industries. These components are engineered to deliver exceptional strength, durability and corrosion resistance. These units are frequently employed in high-pressure and high-temperature applications where safety and reliability are paramount. Utilising these components enables industries to ensure the safe and efficient completion of their projects.
Stud Bolt Materials
The most common materials for stud bolts (for flanges) are ASTM A193 (grade B7, B8, B8M, B8T), ASTM A453 (grade 660), ASTM A320 (grade L7, L7M), and ASTM A182 (duplex and super duplex bolting). For aggressive fluids and environments, stud bolts can be coated with Xylan/PTFE, Zinc and other materials.
| Physical Element | ASTM A193 grade B7 (AISI 4140) | ASTM A193 grade B8 (AISI 304) | ASTM A193 grade B8M (AISI 316) |
|---|---|---|---|
| Carbon | 0.38 - 0.48% | 0.08% max | 0.08% max |
| Manganese | 0.75 - 1.00% | 2.00% max | 2.00% max |
| Phosphorus, max | 0.035% | 0.045% | 0.045% |
| Sulfur, max | 0.040% | 0.030% | 0.030% |
| Silicon | 0.15 - 0.35% | 1.00% max | 1.00% max |
| Chromium | 0.80 - 1.10% | 18.0 - 20.0% | 16.0 - 18.0% |
| Nickel | absent | 8.0 - 11.0% | 10.0 - 14.0% |
| Molybdenum | 0.15 - 0.25% | absent | 2.00 - 3.00% |
| ASTM A193 | Size | Min Tensile Strength (KSI) | Min Yield Strength (KSI) | Min Elongation (%) | RA % min | Max HBW | Max HRC |
|---|---|---|---|---|---|---|---|
| ASTM A193 grade B7 | Up to 2-1/2 | 125 | 105 | 16 | 50 | 321 | 35 |
| 2-5/8 - 4 | 115 | 95 | 16 | 50 | |||
| 4-1/8 - 7 | 100 | 75 | 18 | 50 | |||
| ASTM A193 grade B8 Class 1 | All | 75 | 30 | 30 | 50 | 223 | 35 |
| ASTM A193 grade B8M Class 1 | All | 75 | 30 | 30 | 50 | 223 | 96 |
| ASTM A193 grade B8 Class 2 | Up to 3/4 | 125 | 100 | 12 | 35 | 321 | 35 |
| 7/8 - 1 | 115 | 80 | 15 | 35 | |||
| 1-1/8 - 1-1/4 | 105 | 65 | 20 | 35 | |||
| 1-3/8 - 1-1/2 | 100 | 50 | 28 | 45 | |||
| ASTM A193 grade B8M Class 2 | Up to 3/4 | 110 | 95 | 15 | 45 | 321 | 35 |
| 7/8 - 1 | 100 | 80 | 20 | 45 | |||
| 1-1/8 - 1-1/4 | 95 | 65 | 25 | 45 | |||
| 1-3/8 - 1-1/2 | 90 | 50 | 30 | 45 |
The material chosen for the threaded stud and the hex nuts should be compatible. Materials for bolting sets shall be selected based on the process's working temperatures, as shown in the table below:
| TEMPERATURE °C ( °F ) | ||
| STUD BOLTS MATERIALS | MIN. | MAX. |
| CARBON STEEL | -29 (-20) | 300 (572) |
| A193 B7, L7 | -73 (-100) | 400 (752) |
| A193 B6 | 0 (32) | 500 (932) |
| A193 B8 | -200 (-325) | 575 (1067) |
| A193 B16 | 0 (32) | 520 (968) |
| A193 B17B | -29 (-20) | 650 (1202) |
| A913 Inconel 718 | 0 (32) | 750 (1382) |
| A453 Gr. 660 | -29 (20) | 538 (1000) |
Stud bolts can be coated to increase the resistance to corrosion. The most common types of coatings for stud bolts are listed below:
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