Operation is smooth and direct, and even the largest unit can be opened or closed in a matter of minutes
Many of our closures manufactured as far back as the 1960’s are still in operation
Flexibility of design and can be developed and manufactured to meet your needs
Operation is smooth and direct, and even the largest unit can be opened or closed in a matter of minutes. Turning of the actuating bolts - accomplished by one operator using only standard hand tools - spreads the yoke halves until they are fully separated, allowing the head to be swung open on its hinge. There is no need to tug or hammer at dangerous or heavy flanges or metal doors or to struggle with bulky lugs and threads.
Contact surfaces of the clamping yokes, head and hub are tapered (at less than the friction angle) of dry carbon steel. When the head is closed and the yoke bolts are tightened, the head and hub are wedged together, compressing the O-ring and effecting a leak proof seal. After the pipeline or vessel has been pressurized, the end load on the closure head intensifies frictional resistance at the tapered surfaces, thereby developing an inherent holding action that tends to overcome the relatively small component of force seeking to separate the holding elements. This design pre-supposes non-lubricated contact surfaces. Best used for: pig traps, filters, strainers, scrubbers, heat exchangers, blowdowns, and other vessels
Conventional Pig Launchers & Receivers:
An essential component for pipeline maintenance and inline inspection (ILI), pig launchers send pigs, spheres, and ILI tools into the pipeline, where upstream pressure pushes them through to a receiver.
The Chain and Sprocket Drive option is by far the most economical opening assist device we offer for the TUBE TURNS® Double-Bolt Yoke-style Closure. This is a manually operated aid which assists in the opening and closing of the yoke. These units not only make the process faster, they also prevent uneven movement of the yokes which may cause binding. On larger closures, ratio reduction is available to further reduce the force required to operate the unit. Hand wheels can also be furnished which provide faster operation and eliminate the need for additional tools.
Our Single and Double Bolt Yoke style closures are compact in size and functional in design. A typical unit consists of a forged hub, a hinged blanking head, split-yoke clamps, operating bolts, and a self-energizing O-ring gasket. Materials of construction, including Carbon Steel, Stainless Steel, and other alloys, are in accord with ASME specifications, and manufacture complies with applicable rules of the ASME code for Pressure Piping and with the ASME Boiler and Pressure Vessel Code. A variety of elastomer o-ring seals are available to meet the user's temperature and process compatibility requirements.
Yoke Style Closures Allowable Working Pressures (Ratings) In general, the pressure classes established for Tube Turns Hinged Closures refer to ASME/ANSI B16.5 ratings used in normal piping terminology. This is done as a matter of convenience to give the engineer a clear understanding of service limitations and the exact Hinged Closure design required for a particular application.
Double-bolt yoke style hinged closures are available in pressures ranging from 285 PSI to 6170 PSI and can be used in a horizontal or vertical application. They are furnished in Carbon Steel, Stainless Steel, Low Temperature materials and other alloys depending upon availability of raw material. Adding further to the completeness of Tube Turns Hinged Closures is the availability of standard designs in sizes, 2” to 42” in carbon steel, stainless steel, and other alloys. Sizes up to 72” O.D. have been produced on special orders
The standard gasket for Tube Turns Hinged Closures is an oil-resistant 0-ring that is stationary when the head is being opened or closed. There is no rubbing or chafing that could cause undue wear and shorten seal life. The yokes separate evenly via the use of two yoke bolts preventing wear on the yoke contact surfaces. The yoke bolts are coated with fluorocarbon to lubricate the threads and to prevent rust and corrosion of these working parts. Many of our closures manufactured as far back as the 1960’s are still in operation.
Standard construction material is Carbon Steel made to ASME specifications i.e. SA1O5 or SA106 grade B/C for the hub, SA516 grade 70 or SA105 for the head, SA1O5, SA1O6 Grade B/C or SA352 LCB for the yoke, SA193 Grade B7 for yoke bolts and SA36 for structural components. Buna-N 0- ring material is furnished unless another material is specified. Yoke bolts are fluorocarbon coated to lubricate the threads and prevent rust and corrosion of these working parts.
Pressure Warning Device With Yoke Positioning Plate Double Bolt Yoke Closures are equipped with 2 pressure warning devices on each closure. The Pressure Warning Device with yoke positioning plate provides visual and mechanical assurance that the yokes are in the correct position over the head for commencement of operations. Additionally, the pressure warning device serves the purpose of alerting the operator to any residual pressure in the vessel should the operator inadvertently attempt to open the closure before all pressure has been relieved. A pressure warning device is located at each of the yoke splits with one of the positioning lugs attached to each yoke half.
Tube Turns furnishes a variety of operating aids to speed and simplify the opening and closing of Yoke Type Closures. These range from simple, break-over wrenches, to chain-and-sprocket drives, to fully automated models.
This rapid-operating open/close automation can be driven by mechanical, electrical, hydraulic, or pneumatic power sources, to provide safe and convenient quick opening and closing for numerous applications.
Best used for: pig traps, filters, strainers, scrubbers, heat exchangers, blowdowns, and other vessels
When inquiring and/or purchasing Tube Turns Hinged Closures, please specify the following:
1. Quantity required
2. Size required
3. Material required
4. Design conditions - both pressure and temperature
5. Minimum design metal temperature - the lowest temperature to which closure will be subjected.
6. Application - horizontal (opens like a car door) or vertical (opens like a car hood)
7. Bore (wall thickness) required
8. ASME code stamp and partial data reports required
9. 0-ring materials required
10. Corrosion allowance if applicable
Chain and Sprocket Drives are available on sizes 6" up to 48" Closures
TUBE TURNS® Division designs and manufactures its products in accordance with Section VIII, Division 1 and Division 2 of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code. The ASME Code controls the pressure vessel design, materials, welders' qualifications, methods of construction, testing, inspections and documentation. We are U-Stamp and U2-Stamp certified through ASME, hold an R-Stamp for repair, and are authorized to register products with the NB-Stamp.
If your application calls for a weld neck flange. Tube Turns is able to preform the welding in our shop to save the end user time. Tube Turns has hundreds of Welding Procedures to follow your specifications.