Ctst series pdf

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CanTorque Stud Tensioners

CT Series Topside Stud Tensioners

CanTorque Stud Tensioners

No torsional loading of fasteners.

Direct loading - no damage to assembly.

Easy and fast operation.

Very high accuracy and repeatability.

Automation feasible and can be used for critical applications.

The CTST Stud Tensioner is very simple to use and consists of four parts -Threaded Puller , Load Cell, Bridge and Nut Driver(Nut Rotating Socket).

CTST Series Stud Tensioners are designed for operation in a wide variety of applications including pipeline �anges,heat exchangers, pressure vessels, compressor covers, boilers feed pumps, anchors, bolts and many others.

NUT DRIVER /NUT ROTATING SOCKETBRIDGELOAD CELLTHREADED PULLER

Stud tensioning is now the preferred method of tightening bolts and studs on all critical applications.Stud tensioners are designed for operation in a wide variety of applications including pipeline �ange,heat exchangers, pressure vessels, compressor covers, boiler feed pumps, windmills and many others.We provide a comprehensive range of stud tensioners for optimum soluctions to stud tensioning requirements.Our stud tensioners and accessories are CE marked in accordance with Pressure Equipment and Machinery Directivesas applicable. In comparison to traditional tightening methods, tightening with stud tensioners o�ers signi�cant advantages.

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Stud tensioning is now the preferred method of tightening bolts and studs on all critical applications. Stud tension-

ers are designed for operation in a wide variety of applications including Pipeline Flange, Heat exchangers, Pressure

Vessels, Compressor Covers, Boiler Feed Pumps, Windmill and many others. We provide a comprehensive range of

stud tensioners for optimum solutions to stud tensioning requirements. Our stud tensioners and accessories are Ce

marked in accordance with Pressure equipment and Machinery Directives as applicable. In comparison to traditional

tighening methods, tightening with stud tensioners offers signifi cant advantages.

• No torsional loading of fasteners.

• Direct load - no damage to assembly.

• Easy and fast operation.

• Very high accuracy and repeatability.

• Automation feasible and can be used for critical applications.

The CTST Stud Tensioner is very simple to use and consists of four parts - Threaded Puller, Load Cell, Bridge and Nut Driver (Nut Rotating Socket).

NUT DRIVER/NUTROTATINGSOCKETBRIDGELOAD CELL


The CTST Stud Tensioner is very simple to use and consists of four parts - Threaded Puller, Load Cell, Bridge and Nut The CTST Stud Tensioner is very simple to use and consists of four parts - Threaded Puller, Load Cell, Bridge and Nut

THREADED PULLER

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CanTorque Series Topside Stud Tensioners

Brief Operational Sequence

The nut-driver is placed over the nut (fig. 1). The

bridge and load cell are then placed over the bolt

(fig. 2). The Puller is then screwed over the stud

protruding above the nut face (fig. 3) making sure

that at least 1 x diameter of bolt is engaged with

the Threaded Puller.

Desired hydraulic pressure is now applied to load

cell, which stretches the bolt (fig. 4). The nut is

turned down using the nut-driver and tommy bar.

The Pressure is then released leaving the stud

loaded to the desired value.

Features• VersatileDesign:TheCTSTSeriesstandardvariabletensionersaredesignedtopro-videawiderangeofflexibility,coveringstudsizesfrom3/4”to53/4”(M-16toM-150).Differentstudsizesareaccommodatedby thesame loadcellbysimplychangingtheadaptorkitconsistingofThreadedPuller,BridgeandNutDriver.

• HighStrengthAircraftQualityAlloySteel:TheCTSTSeries tensionersoperateatamaximumpressureof1500BarandaremanufacturedfromhighstrengthAISI4340alloysteelpartsforlonglastingtroublefreeperformance.

• StrokeIndicator:TheCTSTSeriestensionershaveanexceptionalstrokeof15mm.TheIntegralStrokeIndicatorallowsthepistonstroketobeviewedwhiletensioningisinprogress.ARedlineonthepistonindicatesanoverstrokeensuringsafeoperation.

• SafeDesignineventofPiston‘OverStroke’:TheCTSTseriestensionersaredesignedsothatineventofoverstrokethehighpressurefluidwillbereleasedfromtheinnersideoftheloadcell,thussavingtheoperatorfrompotentialexposure.

• MultiTensioning:TheCTSTSeriesloadcellisprovisionedwithtwoconnectionsandthis acts as a manifold for multi tensioning applications. By using high pressure linkhoses,anynumberofbolt tensionerscanbeconnectedandusedsimultaneously.Thisensuresequaltighteningofallboltsontheflangeandreducesworktime.

• Anti Roll, Composite Material Seals:All CTSTTensioners are fitted withAnti Roll,CompositeMaterialsealsforlongerlifeandhighreliability.Thesealsusedhavealowco-efficientoffrictionsothatthepistoncanbereturnedtoaclosedpositionwithminimaleffort.CTSTSeriestensionerscanbeprovidedwithmachinedPU(polyurethane)sealsifrequestedbythecustomer.

• FloatingPiston:Theuniquepistondesignallows2ºtiltwithoutanylossofload,pre-ventingpistonseizureordamagetopistonbore.

THECTSTSERIESTOPSIDEBOLTTENSIONERSAREONEOFTHEMOSTLIGHT,COMPACTANDVERSATILELINEOFTENSIONERSAVAILABLE:

fig. 1 fig. 2

fig. 3 fig. 4


CTST Series Topside Stud Tensioners

*Indicates weight of Load Cell + Adaptor Kit of particular size.

Technical Specifications Model No. Bolt Size Max Load Hyd Area O.D. Min Relief Height Clearance Weight Pinch C A BLoad Cell Adaptor Kit inch mm Ton kN In2 mm2 mm mm mm mm mm kg

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* Weight of load cell + Adaptor Kit of particular size.Please refer to catalogue sheet - ‘Basic of Tensioning’ for stud tensioners application and pressure calculation.


Model No. Bolt Size Max Load Hyd Area O.D. Min Relief Height Clearance Weight Pinch C A BLoad Cell Adaptor Kit inch mm Ton kN In2 mm2 mm mm mm mm mm kg


Stud Tensioner Application

Important Formula:(A)

(B)

(C)

(D)

(E)

Useful Conversions:Ar

Load (Force)

Pressure

Pressure

Basic Calculation and Working:a.

b.

c.

d.

e.

f.

Residual Stud Load = Stud Stress x Stud Tensile Stress Area= (Stud Stretch x Modulus of Elasticity x Stud Tensile stress area) Effective Length.

Stud Tensile Stress Area = (3.14 x D x D) 4 (D is smallest Stress Dia of Stud)

% of Yield Strength = (Stud Stress Required / Yield Strength of stud x 100)

Hydraulic Pressure = (Residual Stud Load x Load Relaxation Factor) Hydraulic Area of Load Cell.

L oad R elaxation Factor = 1.01 + (Stud Size (Dia.) Effective Length) or 1.1 which ever is greater.

2 2 2 2 2ea : 1 millimeter (mm ) = 0.00155 inch 1 inch = 645.16 mm2 2 2 2 2: 1 centimeter (cm ) = 0.155 inch 1 inch = 6.4516 cm

: 1 Metric Ton (mt) = 1.10231 Short Ton (US) 1 mt = 0.9842 Long Ton (UK): 1 Kilo Newton, kN = 224.8089 lb 1 kN = 0.0958 mt: 1 Metric Ton (mt) = 9.8066 kN 1 st = 0.0958 mt

: 1 Megapascal (MPa) = 10 Bar 1 bar = 14.5037 psi2 2 2: 1 Kg per cm (Kg/cm ) = 0.98066 Bar 1 bar = 1.0197 Kg/cm

: 1 Megapascal (MPa) = 10 Bar 1 bar = 14.5037 psi

50% Tool Coverage 100% Tool Coverage

Calculate Stud Residual Load: Residual Load can be calculated from known stress or bolt stretch requirement.

Calculate Load Relaxation factor using Stud Dial and Effective Length. It can be calculated from below formula/Chart

Calculate application hydraulic load.

Calculate hydraulic pressure for required hydraulic load.

Select Tensioning Procedure. (25%, 50%, 100%...etc.)

Calculate pass load as applicable. (Max applied load should never exceed 95% stud yield strength).

Fine Pitch Coarse Pitch

L

D

1 2 3 4 5 6 7 8 9 10 11 12 13 14

1.11.21.31.41.51.6

1

F h/F r F h = Hydraulic L oadF r = R es idual L oad

F h/F r

L /D

CT Series SpecificationsStud Tensioner Application

Website: www.powermaster

a. Calculate Stud Residual Load: Residual Load can be calculated from known stress or bolt stretch requirement.b. Calculate Load Relaxation factor using Stud Diameter and Effective Length. It can be calculated from below formula/chart.

Documents

Ctst series pdf