It is lighter, less expensive and much more convenient than blind flanges
Closures are available in any configuration to accommodate your application
Stamping of TUBE TURNS® T-Bolt Closures is available on request at a nominal extra cost
The simplicity of construction and operation are keynotes of the Tube Turns T-Bolt Hinged Closure. The closure consists of a thick semi-elliptical head that is hinged to a matching hub, a self-energized 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” 0-ring are satisfactory. Other metals and elastomers are furnished on special request. The T-Bolt Hinged Closure is opened quickly and easily.The operator merely loosens the T-Bolts until they clear the head lugs and allow the head to be swung open on its hinge. Complete, unrestricted access is provided, too, since the standard hinging permits a full 180°opening. Quick Opening Swing Bolt Hinged Closure provides a fast, economical, yet simple means of access to pressure vessels and lines that require frequent opening. high-pressure manway
Hinged Closure Materials:
Internal (Wetted) Materials:
Carbon Steel (ex. SA516-70), Stainless Steel (ex. SA240-304, 304L, 316, 316L), Duplex Stainless Steel (ex. SA240-S31803), Inconel (ex. SB168-N0660), etc.
wCarbon Steel, Stainless Steel, etc.
The Break-Over Wrench Lug is welded to the T-Bolt (head bolt) and a handle is inserted over this lug. A pin is then inserted through the handle and the lug allowing the handle to act as a wrench and making the Break-Over Wrench an integral part of the T-Bolt Assembly.
In a Camlock Assembly,components replace the tapped swing nut (in the hub nut mount).The Camlock bolting unit consists of a high strength eye bolt that is pinned through an eccentric cam to provide the necessary clamping action.The caming action is adjustable by moving the adjustable nut at the threaded end of the eye bolt. This allows the camlock assembly to be loosened & tightened merely by lowering or raising the cam handle.
T-Bolt Closures with a spring loaded head for vertical applications are furnished in sizes 10”- 42”.The need for spring loading can be determined by reference to the table below. The tabulated “Force to Lift Head”is the force to lift the head without the springs. Manway covers for tanks
Standard Vertical T-Bolt. Manway covers for tanks
"ManWay Closures, T Bolt Hinged, Swing Bolt, Fast Opening Blind. Hinged manway for tanks. tank covers" Quick Opening Swing Bolt Hinged Closure
The T-Bolt hinged closure is joined to the pipe or vessel nozzle by a circumferential butt-weld, employing standard welding techniques appropriate to the particular installation.
To close the T-bolt hinged closure, first inspect the O-ring and seating surface and remove any foreign material, then close the head. All bolts should be swung into place and tightened. The bolts should be tightened in an alternating sequence in the same manner as flanges.
Gasket: The O-ring should be inspected prior to every closing. Variations in service conditions will determine its useful life. Frequency of replacement will depend upon such factors as operating pressure and temperature, shrinkage and swelling caused by product absorption, the corrosiveness of the product in the system and frequency of operation.
Bolts: Lubricate the bolts periodically in accordance with the frequency and severity of the service involved. Inspect the head bolts periodically for thread wear.
ManWay Closures, T Bolt Hinged, Swing Bolt, Fast Opening Blind. Hinged manway or covers for tanks. High Pressure Manway
Standard Tube Turns T-Bolt Hinged Closures are furnished in carbon steel, stainless steel, & other alloys. Sizes range from 6” thru 66”.
“Buna-N”is the standard 0-ring gasket material. For services above 250F or where special corrosive conditions are to be encountered,0-rings of “Viton”,Silicone Rubber, “Neoprene’ Ethylene Propylene,“Teflon Encapsulated”(Viton or Silicone Core) can be furnished at an extra charge.
Break-Over Wrenches and Camlocks are optional attachments and accessories adding further to the versatility and utility of our T-Bolt Closures. Attachment of either of these options to the closure’s T-Bolts provides extra convenience, speed and ease in tightening the bolts. These attachments eliminate the need for separate wrenches. Quick Opening Swing Bolt Hinged Closure provides a fast, economical, yet simple means of access to pressure vessels and lines that require frequent opening.
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 . high pressure manway
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
1. Manways for storage tanks, mixing vessels, filters, separators and other batch equipment.
2. Caps for inspection ports and other access openings on towers and reactors.
3. Handholes on processing equipment and medical or laboratory apparatus such as hyperbaric chambers.
Stamping of TUBE TURNS® T-BoltClosures is available on request at a nominal extra cost. This includes (1) the furnishing of a Partial Data Sheet verifying shop inspection of the unit by a commissioned inspector of the National Boiler and Pressure Vessel Inspectors, and (2) the affixing of the ASME stamp on the closure.
Contact firstname.lastname@example.org for more information on "swing bolt closures"
Ratings apply to stainless steel closures with carbon steel bolts and attachments. Closures of all stainless steel are rated lower. For temperatures higher than 450F, consult Tube Turns stating temperature, pressure, fluid and type of o-ring required. Ratings apply for closures with ASME SA325 bolts. Slightly higher ratings are available in some sizes upon application by using ASME SA193 Grade B7 bolts, resulting in a slightly higher price.
Above ratings good for 450F. “Buna-N” is the standard 0-ring gasket material. For services above 250F or where special corrosive conditions are to be encountered, 0-rings of “Viton”, Silicone Rubber, “Neoprene’ Ethylene Propylene, “Teflon Encapsulated” (Viton or Silicone Core) can be furnished at an extra charge.
All dimension are in inches. When ordering, please specify class, nominal size, bore, material and service conditions. T-Bolt Closures with longer hubs; Closures made to I.D. dimensions; or Closures equipped with Sight Glasses, Break-over Wrenches, Camlocks and other accessories are available on special order. *Standard Closures are taper bored to match standard wall thickness.
Spare Parts: Stock two extra O-rings per closure for each individual closure. If several closures of the same size are installed close to one another, the number of extra O-rings may be reduced. Replacement bolts and swing nuts are readily available from Tube Turns.
Break-Over Wrenches and Camlocks are optional attachments and accessories adding further to the versatility and utility of our T-Bolt Closures. Attachment of either of these options to the closure’s T-Bolts provides extra convenience, speed and ease in tightening the bolts. These attachments eliminate the need for separate wrenches.