Collar Bolts are specialized fasteners designed with a central collar and threaded sections for controlled fastening in equipment and structural assemblies. They are particularly useful in heat exchangers and pressure vessel applications, where the fastener configuration helps secure components while supporting convenient installation and removal.
A typical Collar Bolt features threaded sections with a collar positioned between them, along with a wrenching surface that allows the bolt to be held or tightened using suitable tools. The collar can help maintain the required position of the fastener and reduce unwanted rotation during nut tightening.
Adore Industries manufactures and supplies Collar Bolts in different materials, thread configurations, dimensions, and surface treatments according to applicable standards and customer drawings.
Key Features
- Specialized collar design for controlled fastening
- Suitable for heat exchanger assemblies
- Used in pressure vessels and industrial equipment
- Helps maintain the fastener position during installation
- Wrenching section available for tool engagement
- Designed with controlled dimensional tolerances
- Available in different materials and grades
- Metric and imperial thread options available
- Customized dimensions and configurations available
Applications
Collar Bolts are commonly used in:
- Shell-and-tube heat exchangers
- Detachable bundle heat exchangers
- Pressure vessels
- Industrial process equipment
- Chemical processing equipment
- Petrochemical equipment
- Power generation equipment
- Mechanical assemblies
- Industrial machinery
Collar Bolt Design
The main structure of a Collar Bolt consists of threaded portions combined with a central collar. A wrenching flat or suitable tool-engagement area can be incorporated to assist with installation and tightening.
The collar provides a defined section within the fastener assembly and can help maintain the bolt’s position while the corresponding nut is tightened.
Heat Exchanger Applications
Collar Bolts are particularly useful in detachable bundle heat exchanger assemblies. Their design can support the fastening arrangement used for securing components while allowing the bundle to be handled during maintenance and servicing.
Proper dimensions and tolerances are important to ensure compatibility with the specific heat exchanger design. Adore Industries can manufacture Collar Bolts according to customer drawings and equipment specifications.
Vibration & Equipment Applications
In suitable assemblies, the controlled fastening arrangement of Collar Bolts can help maintain component positioning and reduce unwanted movement between connected parts. Proper fastening, material selection, and installation are essential for achieving the required performance.
Manufacturing
Adore Industries manufactures Collar Bolts according to required dimensions, thread configurations, material grades, and application specifications. Dimensional consistency and accurate threading can be maintained according to customer drawings and applicable standards.
Standards
Collar Bolts can be manufactured or supplied according to applicable standards, including:
- ANSI
- ASTM
- DIN
- ASME
- BS
- Other international standards
Customized manufacturing is also available according to customer drawings and project requirements.
Materials
Collar Bolts are available in materials suitable for different temperature, pressure, corrosion, and expansion requirements, including:
- High Tensile Steel
- High-Temperature & High-Pressure Grades according to applicable ASTM/ASME specifications
- Austenitic Stainless Steel
- Duplex Stainless Steel
- Super Duplex Stainless Steel
- 17-4 PH Precipitation-Hardened Stainless Steel
- ASTM A453 Grade 660 Fasteners
Material selection can be based on the operating conditions and specific equipment requirements.
Available Sizes & Threads
Collar Bolts can be supplied with metric and imperial thread configurations according to customer drawings and project specifications.
Dimensions including bolt diameter, collar dimensions, thread length, overall length, and wrenching features can be customized to suit specific equipment requirements.
Coatings & Surface Treatments
Different surface treatments can be provided according to the material and application requirements.
Available options include:
- Blackening
- Zinc Plated
- Hot-Dip Galvanized
- PTFE Coated
Additional surface treatments can be considered according to customer specifications.
Why Choose Adore Industries for Collar Bolts?
Adore Industries manufactures and supplies Collar Bolts for heat exchangers, pressure vessels, process equipment, and other industrial applications. We offer customized dimensions, materials, thread configurations, and surface treatments to meet specific equipment and project requirements.
Contact Adore Industries for Collar Bolts manufactured according to your required drawings, materials, dimensions, standards, and surface treatment.