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SA193 B7 Black Stud Bolt
QS Fastener: SA193 B7 Black Stud Bolt
Name: SA193 B7 Black Stud Bolt
Standard: ASTM
Material: SA193 B7
Size: 3-1/2 Inch
Length: 750 mm
Thread: 8 UN
Brand: Qishine
Surface Finished: Black
Standard: ASTM
Material: SA193 B7
Size: 3-1/2 Inch
Length: 750 mm
Thread: 8 UN
Brand: Qishine
Surface Finished: Black
Quantity
The SA193 B7 Black Stud Bolt is a high-performance fastener specifically designed to meet the demanding standards of industrial applications! Made from SA193 B7 material and compliant with ASTM standards, it is suitable for extreme working conditions. With a size of 3-1/2 inches and a length of 750 mm, it features an 8 UN thread. The surface is treated with a black oxide finish, enhancing its corrosion resistance. Crafted with precision by the Qishine brand, it delivers reliable quality. The SA193 B7 Black Stud Bolt is widely used in industries such as petrochemicals, energy equipment, and heavy machinery, making it an ideal choice for critical applications. With its exceptional performance, the Stud Bolt ensures the safety and efficiency of your projects!
Installation and Maintenance of the SA193 B7 Black Stud Bolt
To ensure the reliability and long-term performance of the Stud Bolt, proper installation and maintenance are crucial. Below is a detailed guide for installation and maintenance:
To ensure the reliability and long-term performance of the Stud Bolt, proper installation and maintenance are crucial. Below is a detailed guide for installation and maintenance:
1. Preload Control
Preload is a critical factor in ensuring the reliability of the Stud Bolt connection. The preload of B7 stud bolts should be controlled within 60%-70% of the material’s yield strength to avoid overloading or loosening.
Preload is a critical factor in ensuring the reliability of the Stud Bolt connection. The preload of B7 stud bolts should be controlled within 60%-70% of the material’s yield strength to avoid overloading or loosening.
Material Properties of the SA193 B7 Black Stud Bolt:
Minimum Tensile Strength: 1034 MPa
Yield Strength: 862 MPa
Recommended Preload Range: 60%-70% × Yield Strength = 517-603 MPa
Minimum Tensile Strength: 1034 MPa
Yield Strength: 862 MPa
Recommended Preload Range: 60%-70% × Yield Strength = 517-603 MPa
Recommended Preload for the Stud Bolt: 3000 KN (based on engineering practices and ASME standards)
Preload Control Methods:
Use a torque wrench or hydraulic tensioner to precisely control the preload.
Use a torque wrench or hydraulic tensioner to precisely control the preload.
2. Lubricant Selection
Lubricants reduce friction and prevent galling, especially in high-temperature environments.
Lubricants reduce friction and prevent galling, especially in high-temperature environments.
Recommended Lubricants:
Molybdenum Disulfide (MoS₂): Suitable for high-temperature environments, reducing the friction coefficient to 0.10-0.15.
Molybdenum Disulfide (MoS₂): Suitable for high-temperature environments, reducing the friction coefficient to 0.10-0.15.
Graphite-Based Lubricants: Ideal for environments above 500°C, offering excellent heat resistance and lubrication performance.
Lubricant Application Tips:
Apply lubricant evenly on the threads and nut contact surfaces of the SA193 B7 Black Stud Bolt.
Avoid excessive use of lubricant, as it may affect preload control.
Apply lubricant evenly on the threads and nut contact surfaces of the SA193 B7 Black Stud Bolt.
Avoid excessive use of lubricant, as it may affect preload control.
3. Anti-Loosening Measures
In high-vibration environments, the SA193 B7 Black Stud Bolt is prone to loosening, necessitating anti-loosening measures.
In high-vibration environments, the SA193 B7 Black Stud Bolt is prone to loosening, necessitating anti-loosening measures.
Recommended Anti-Loosening Methods:
Anti-Loosening Washers: Such as spring washers or serrated washers, which can effectively prevent loosening.
Using anti-loosening washers can reduce preload loss to less than 5%.
Anti-Loosening Washers: Such as spring washers or serrated washers, which can effectively prevent loosening.
Using anti-loosening washers can reduce preload loss to less than 5%.
4. Tool Selection and Recommendations
Tools:
Torque Wrench: For precise preload control, with a recommended accuracy of ±3%.
Hydraulic Tensioner: Suitable for large-diameter bolts, offering higher preload accuracy.
Tools:
Torque Wrench: For precise preload control, with a recommended accuracy of ±3%.
Hydraulic Tensioner: Suitable for large-diameter bolts, offering higher preload accuracy.
Tool Usage Tips:
Regularly calibrate tools to ensure their accuracy.
Follow a cross-tightening sequence when installing the 3.5 Inch B7 Stud Bolt to ensure even load distribution.
Regularly calibrate tools to ensure their accuracy.
Follow a cross-tightening sequence when installing the 3.5 Inch B7 Stud Bolt to ensure even load distribution.
5. Regular Inspection and Maintenance
To ensure the long-term reliability of the SA193 B7 Black Stud Bolt, regular inspections and maintenance are essential.
To ensure the long-term reliability of the SA193 B7 Black Stud Bolt, regular inspections and maintenance are essential.
Inspection Checklist:
Preload: Use ultrasonic testers or torque wrenches to check if the preload is within the acceptable range.
Corrosion: Inspect the surface of the Stud Bolt for corrosion, cracks, or deformation.
Lubrication Status: Check if the lubricant has degraded and reapply if necessary.
Preload: Use ultrasonic testers or torque wrenches to check if the preload is within the acceptable range.
Corrosion: Inspect the surface of the Stud Bolt for corrosion, cracks, or deformation.
Lubrication Status: Check if the lubricant has degraded and reapply if necessary.
Maintenance Recommendations:
In high-temperature environments, conduct a comprehensive inspection of the SA193 B7 Black Stud Bolt every 6 months.
Replace any corroded or damaged stud bolts promptly to ensure connection safety.
In high-temperature environments, conduct a comprehensive inspection of the SA193 B7 Black Stud Bolt every 6 months.
Replace any corroded or damaged stud bolts promptly to ensure connection safety.
With proper installation, maintenance, and the use of the SA193 B7 Black Stud Bolt, you can achieve reliable and long-lasting performance in your industrial applications!
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