Technician using a hydraulic tool on a large flange

Bolting & Flange Management Tools

Controlled Bolting. Precise Flange Maintenance.

Bolt tensioners · Torque wrenches · Flange spreaders · Alignment tools

Explore hydraulic bolting and flange management tools for industrial assembly, maintenance and shutdown requirements.

Dar Almahireen Technical Services L.L.C. supports project-specific enquiries for bolt tensioners, hydraulic torque wrenches, flange spreaders and alignment tools, with equipment selection based on bolt dimensions, required load or torque, flange geometry and site conditions.

Explore the Range

Our Product Range

4 Product Lines

Hydraulic Bolt Tensioners

Controlled axial loading of studs and bolts.

Hydraulic Torque Wrenches

Controlled tightening and loosening.

Flange Spreaders

Controlled separation of flange joints.

Flange Alignment Tools

Correction of flange misalignment.

01 / Hydraulic Bolt Tensioners

Controlled Axial Bolt Loading

Hydraulic bolt tensioners apply a calculated axial load directly to a stud or bolt. The nut is then seated while the bolt is elongated, allowing the joint to be assembled using a specified tensioning procedure.

Product options: General-purpose hydraulic tensioners, compact tensioners and application-specific tensioning assemblies.

Applications: Pressure-vessel flanges, heat exchangers, turbines and large industrial bolted joints.

Typical technical specifications

Parameter	Indicative range / options
Stud diameter	M16–M100 across selected tensioner families
Maximum tensioning load	Approx. 134–4,650 kN across selected models
Maximum working pressure	Up to 1,500 bar in the referenced hydraulic series
Hydraulic stroke	Approx. 10–15 mm in the referenced series
Operation	Hydraulic axial tensioning
Accessories	Hydraulic pump, high-pressure hoses, couplers, pullers and bridges

02 / Hydraulic Torque Wrenches

Controlled Tightening & Loosening

Hydraulic torque wrenches apply a specified turning moment to threaded fasteners. Tool selection depends on the required torque, nut size, available reaction point and working clearance.

Product options: Square-drive torque wrenches and low-profile hexagon cassette torque wrenches.

Applications: Pipeline flanges, pressure equipment, industrial machinery and plant maintenance.

Typical technical specifications

Parameter	Indicative range / options
Torque output	Approx. 200–34,000 Nm across selected hydraulic wrench families
Hydraulic operating pressure	Up to approximately 690–700 bar
Square-drive sizes	Commonly ¾–2½ in. across selected models
Tool configuration	Square drive / Low-profile cassette
Operation	Double-acting hydraulic
Accessories	Compatible pump, twin-line hose, reaction arm and impact-rated socket or cassette

03 / Flange Spreaders

Controlled Flange Separation

Flange spreaders create a controlled opening between compatible flange faces during maintenance and component replacement. Mechanical and hydraulic designs are available for different access gaps and force requirements.

Product options: Mechanical wedge spreaders, hydraulic wedge spreaders and bolt-hole gripping spreaders.

Applications: Gasket replacement, valve removal, pump maintenance and flange-joint servicing.

Typical technical specifications

Parameter	Indicative range / options
Maximum spreading force	Approx. 8–14 tonnes-force in the referenced wedge series
Minimum tip clearance	Approx. 6 mm for the referenced wedge models
Maximum spread	Up to approximately 80 mm with specified stepped blocks
Hydraulic operating pressure	Up to approximately 700 bar for the referenced hydraulic model
Operation	Mechanical / Hydraulic
Accessories	Safety blocks, stepped blocks and safety lanyards; pump, hose and gauge for compatible hydraulic sets

04 / Flange Alignment Tools

Precise Flange Positioning

Flange alignment tools help correct lateral or rotational misalignment between compatible flange joints during installation and maintenance. They support controlled positioning before the joint is assembled.

Product options: Mechanical alignment tools and hydraulic alignment tools.

Applications: Pipework installation, flange reassembly, gasket replacement and industrial maintenance.

Typical technical specifications

Parameter	Indicative range / options
Maximum alignment force	Approx. 10–90 kN across the referenced models
Minimum flange bolt size	Approx. 16–31.5 mm, model-dependent
Maximum flange thickness	Approx. 41–114 mm per flange in the referenced range
Operation	Mechanical / Hydraulic
Alignment function	Correction of compatible flange misalignment
Accessories	Model-specific mounting and actuation components

Industries & Applications

Tools for Industrial Assembly & Maintenance

Oil & Gas
Petrochemical Plants
Marine & Offshore
Power Generation
Refineries
Industrial Maintenance

Request a Quote

Need Bolting or Flange Management Tools?

Share your equipment requirement, bolt or flange dimensions, required load or torque, quantity and delivery location with Dar Almahireen Technical Services L.L.C. We can review the requested configuration and discuss suitable supply options.

Contact Dar Almahireen Schedule a Meeting

Explore other products