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  • Structural bolt tightening works were carried out on a 50 metre cycle track bridge in Malaysia using Hi-Force TWP22S pneumatic torque multiplier with respective sockets. A total of 568 bolts were tightened within three days and involved tightening of M24, M27 and M30 bolts to a specific torque. #hiforce #bolttightening #torqueing #torquemultiplier
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STS Metric Range

STS Range
  • Capacities from 234 to 2649 kN
  • Working pressure 1500 Bar
  • Bolt sizes from M16 to M100

The STS metric bolt tensioner range is designed for topside operation in a wide variety of applications including pipeline flanges, heat exchangers, pressure vessels, compressor covers, boiler feed pumps, anchor bolts and many others. The range comprises of 32 metric size options ranging from M16 to M100 thread size and all models are suitable for working pressures up to 1500 Bar. Each model of hydraulic tensioning cylinder within the tensioner range can be operated with a variety of threaded pullers and nut rotating sockets ensuring that the maximum possible range of bolt sizes can be accommodated using the minimum number of hydraulic cylinders. Threaded pullers and nut rotating sockets are available as individual components.

All Hi-Force hydraulic bolt tensioners are designed and manufactured to include a wear coated piston, maximum piston stroke indicator, self-energising high pressure seals, dual quick connect couplings for easy multiple tensioner connection and a user friendly operation and maintenance procedure.

  • Single acting design
  • Nitrocarburised piston
  • Maximum piston stroke indicator
  • Suitable for single or multi-tensioning applications
  • Specially designed tensioners available on request
  • User friendly operating and maintenance procedure
  • Modular design for optimum versatility
  • Dual quick connect couplings for easy connection
  • Choice of manually operated or air powered pumps available
Topside Bolt Tensioners Metric Range

Specifications

Model No. Bolt Thread Size Thread pitch Capacity Effective area cm2 Stroke mm Weight kg Dimensions in mm
kN tonnes A B C D E F
STS1-M16B1 M16 2 234 23.9 15.6 10 1.7 74 28 74 90 45 47
STS1-M18B1 M18 2.5 234 23.9 15.6 10 1.7 74 28 74 90 45 49
STS1-M20B1 M20 2.5 234 23.9 15.6 10 1.7 74 28 74 90 45 51
STS1-M22B2 M22 2.5 234 23.9 15.6 10 1.7 74 30 80 98 45 56
STS1-M24B2 M24 3 234 23.9 15.6 10 1.7 74 30 80 98 45 59
STS1-M27B2 M27 3 234 23.9 15.6 10 1.7 74 30 80 98 45 61
STS2-M30B1 M30 3.5 457 46.6 30.5 15 3.5 102 39 103 128 54 71
STS2-M33B1 M33 3.5 457 46.6 30.5 15 3.5 102 39 103 128 54 74
STS2-M36B1 M36 4 457 46.6 30.5 15 3.5 102 39 103 128 54 77
STS2-M39B1 M39 4 457 46.6 30.5 15 3.5 102 39 103 128 54 80
STS3-M42B1 M42 4.5 822 83.8 54.8 15 6.1 133 47 115 150 56 91
STS3-M45B1 M45 4.5 822 83.8 54.8 15 6.1 133 47 115 150 56 94
STS3-M45B2 M45 4.5 822 83.8 54.8 15 6.1 133 50 117 155 56 105
STS3-M48B1 M48 5 822 83.8 54.8 15 6.1 133 47 115 150 56 97
STS3-M48B2 M48 5 822 83.8 54.8 15 6.1 133 50 117 155 56 105
STS3-M52B2 M52 5 822 83.8 54.8 15 6.1 133 50 117 155 56 105
STS4-M48B1 M48 5 1264 128.9 84.3 15 10.6 163 50 119 149 57 105
STS4-M52B1 M52 5 1264 128.9 84.3 15 10.6 163 50 119 149 57 108
STS4-M52B2 M52 5 1264 128.9 84.3 15 10.6 163 62 135 165 57 120
STS4-M56B2 M56 5.5 1264 128.9 84.3 15 10.6 163 62 135 165 57 120
STS4-M60B2 M60 5.5 1264 128.9 84.3 15 10.6 163 62 135 165 57 124
STS4-M64B2 M64 6 1264 128.9 84.3 15 10.6 163 62 135 165 57 126
STS5-M64B1 M64 6 1833 186.9 122.2 15 16.0 193 73 145 187 60 134
STS5-M68B1 M68 6 1833 186.9 122.2 15 16.0 193 73 145 187 60 136
STS5-M72B1 M72 6 1833 186.9 122.2 15 16.0 193 73 145 187 60 139
STS5-M76B1 M76 6 1833 186.9 122.2 15 16.0 193 73 145 187 60 142
STS6-M76B1 M76 6 2649 270.0 176.6 15 23.5 233 84 178 216 64 158
STS6-M80B1 M80 6 2649 270.0 176.6 15 23.5 233 84 178 216 64 160
STS6-M85B1 M85 6 2649 270.0 176.6 15 23.5 233 84 178 216 64 162
STS6-M90B1 M90 6 2649 270.0 176.6 15 23.5 233 84 178 216 64 170
STS6-M95B3 M95 6 2649 270.0 176.6 15 23.5 233 105 205 257 64 184
STS6-M100B3 M100 6 2649 270.0 176.6 15 23.5 233 105 205 257 64 190

Note: Weight is for load cell and bridge only. Total weight of complete assembly depends on size of puller and nut rotating socket selected. Tommy bars are not included. Hi-Force recommends one tommy bar for every four tensioners. 

Tommy Bar

Tensioner Range Tommy Bar
STS1 TTB06
STS2 TTB08
STS3 TTB10
STS4 TTB10
STS5 TTB14
STS6 TTB14

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