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  • Home
  • Torqueing & Tensioning
In-Situ Torquing & Tensioning Services

Controlled Bolt Tightening & Hydraulic Tensioning | Precision On-Site Bolting Solutions

At AutoMech inSitu, we provide complete on-site torquing and hydraulic tensioning services for critical bolted joints in refineries, power plants, petrochemical units, offshore platforms, and heavy industrial systems.
Our highly trained technicians use precision-calibrated torque and tensioning tools to ensure every joint achieves the correct preload and clamping force - eliminating the risk of leaks, joint failures, or uneven load distribution.
We specialize in safe, accurate, and simultaneous multi-bolt operations, minimizing downtime and improving joint integrity across a wide range of industries.

Torquing & Tensioning Capabilities

Torquing & Tensioning Capabilities

ParameterSpecification
Bolt Diameter RangeM16 to M150 (or equivalent imperial sizes)
Torque RangeUp to 100,000 Nm
Tensioning PressureUp to 2,500 bar (as per bolt specification)
Tools TypeHydraulic / Pneumatic / Manual Torque Wrenches & Hydraulic Bolt Tensioners
Accuracy±10% preload control
Drive OptionsHydraulic / Pneumatic / Electric pump systems
Application RangeFlanges, reactors, exchangers, turbines, compressors, structural bolting
Torqueing (Controlled Bolt Tightening)
Our controlled torqueing services ensure every bolt is tightened uniformly to achieve the correct tension.
Key Features
  1. Precision torque-controlled tightening up to 100,000 Nm.
  2. Single or multi-bolt tightening sequences for even stress distribution.
  3. Calibrated torque tools with digital readout for traceable accuracy.
  4. Suitable for flange joints, pressure vessels, heat exchangers, and rotating equipment.
  5. Torque verification and documentation for QA/QC compliance.
Hydraulic Bolt Tensioning
Our hydraulic tensioning systems directly stretch the bolt to achieve the desired preload without relying on friction.
Key Features
  1. Uniform bolt elongation with up to ±10% accuracy.
  2. Multi-bolt simultaneous tensioning for large flange assemblies.
  3. Eliminates galling, thread damage, and torque scatter.
  4. Safe, spark-free, and controlled operation for hazardous zones.
  5. Ideal for critical joints in offshore, nuclear, and petrochemical plants.
Typical Applications
Our torquing and tensioning services are widely used for
1. Pipe flanges and valve assemblies
2. Pressure vessels and reactors
3. Heat exchangers and boilers
4. Gas turbines and compressors
5. Subsea and offshore bolted joints
6. Structural joints in cranes, presses, and bridges
7. Shutdown, commissioning, and maintenance activities
Process Flow
  1. Joint Evaluation – Inspection of flange, bolt size, lubrication, and load requirement.
  2. Calculation & Planning – Determination of torque/tension values and tightening sequence.
  3. Tool Setup – Installation of torque wrenches or hydraulic tensioners.
  4. Execution – Controlled tightening or simultaneous tensioning of bolts.
  5. Verification – Load verification through elongation or torque measurement.
  6. Documentation – Detailed bolting report and QA certification.
Advantages of AutoMech inSitu
  1. On-site torquing & tensioning – no need to dismantle equipment.
  2. Highly accurate preload control for leak-free joints.
  3. Calibrated and certified tools for traceable results.
  4. Experienced technicians trained in safety and precision bolting.
  5. Quick mobilization and 24/7 on-site availability.