T-Bolt Closures
Nominal Pressure Applications
Economical, lightweight alternative to blind flanges for low to medium pressure
Overview
TUBE TURNS® exclusive T-Bolt Closure is designed expressly for low- to medium-pressure applications. It is lighter, less expensive and much more convenient than blind flanges and job-fabricated closure devices.
Economical price and low initial cost are especially attractive features of the TUBE TURNS® T-Bolt Closure. T-Bolt Closures are available in horizontal (opens like a car door) and vertical (opens like a car hood) configurations.
A complete unit normally costs less than the component parts for a blind or slip-on flange combination. There need be no additional expenses for hinges, hoists, davits, etc., as the closure can be fully assembled when shipped. Furthermore, installation-labor charges are held to a minimum; a single butt weld joins the closure to the vessel, vessel nozzle, or pipe.
Key Features & Benefits
T-Bolt closures engineered for economy, simplicity, and reliable operation
Economical Design
Lighter, less expensive and more convenient than blind flanges
Compact & Lightweight
Compact design with light weight for easy handling and installation
Quick Operation
Opens quickly and easily by loosening T-bolts until they clear holding lugs
Full Access
180° opening provides complete, unrestricted access
TOOL-LESS® Options
Breakover handles and camlock wrenches allow operation without tools
Safety Warning
Angled holding lugs provide pressure warning during opening
Design & Construction
Compact design, light weight, and simplicity of construction and operation
Construction Details
The closure consists of a thick elliptical head hinged to a matching hub, a self-energizing O-ring and a suitable number of T-bolts to effect and maintain a tight seal. For most services, the standard materials - carbon steel and a "Buna-N" O-ring - are satisfactory.
Configuration Options
Available in horizontal and vertical configurations to suit your application
Horizontal Configuration
Opens like a car door - ideal for side access applications
Vertical Configuration
Opens like a car hood - perfect for top access applications
Warning Features
Built-in safety features alert operators to potential pressure hazards
Angled Holding Lugs
Mounted at approximately 10° angle requiring extra turns to clear
Pressure Alert System
Initial turns allow head to lift slightly, releasing contained fluid
Controlled Opening
Head movement restrained until T-bolt clears holding lug completely
Operator Safety
Alerts operator to possible danger before full opening
The holding lugs are mounted on the closure head at an angle of approximately 10 degrees. This provides a valuable feature, for the angular mounting requires that the T-bolt be backed off an extra turn or two before it will swing out of the holding position. Thus, if there is pressure in the vessel while it is being opened, initial turns of the bolts permit the head to lift slightly and the contained fluid escapes, alerting the operator to possible danger. Further movement of the head is restrained, since the T-bolt still is confined within the holding lug.
Cost Advantages
Significant cost savings compared to traditional closure methods
Quick & Easy Operation
The T-Bolt Hinged Closure is opened quickly and easily. The operator merely loosens the T-Bolts until they clear the holding lugs and allow the head to be swung open on its hinge.
Complete, unrestricted access is provided; too, since the standard head stop permits a full 180° opening.
Other convenient options include breakover handles and camlock wrenches that allow the T-Bolt closure to be opened and sealed without tools.
ASME Code Stamped Closures
Code Stamping of TUBE TURNS® T-Bolt Closures is available on request at a nominal extra cost. This includes:
Applications
Ideal for low to medium pressure applications requiring frequent access
Low to Medium Pressure Vessels
Process Equipment Access
Filter Housings
Strainer Applications
Storage Tank Access
Inspection Ports
Maintenance Access Points
Sanitary Equipment
Materials Available
Gasket Materials
Product Gallery
T-Bolt closures in various configurations and applications
Literature & Documentation
Technical documentation and product information
T-Bolt Closure Brochure (EN)
PDF • English
T-Bolt Closure IOM TT710 (EN)
PDF • English
Related Products
Explore our complete family of quick opening closures
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