left_bottom_img.jpg
Tools > Bolting Tools

Bolting Tools

Professional hydraulic and mechanical tools for the bolting industry

Enerpac Bolting Tools

Enerpac's Bolting Solutions caters to the complete bolting work-flow, ensuring joint integrity in a variety of applications throughout industry:

Joint Assembly

From simple pipe alignment to complex joint positioning of large structural assemblies, our comprehensive line of joint assembly products range from hydraulic and mechanical alignment tools to PLC-controlled multi-point positioning systems.

Controlled Tightening

Enerpac offers a variety of controlled tightening options to best meet the requirements of your application. From mechanical torque multipliers to hydraulically driven square drive wrenches, and from low profile torque wrenches to inter-connectable bolt tensioning tools; we offer the products you need for accurate and simultaneous tightening of multiple bolts.

Joint Separation

Enerpac also provides hydraulic nut splitters and a variety of mechanical and hydraulic spreading tools for joint separation during inspection, maintenance and decommissioning operations.

High quality bolting solutions from the brand you can trust. Enerpac tooling from Jonel Hydraulics can make your bolting work-flow more accurate, safer and efficient.

 

Bolting Solutions Reference Table

Bolting Problem Bolting Solution

Misaligned joints

Joints must be pulled together and correctly aligned prior to tightening. Current methods of manipulation tend to be dangerous and involve a high degree of manual lifting using slings, hooks and lifting gear. These methods can damage joint components, are time consuming in setup and disassembly, operational time and the amount of manpower required.

Flange Alignment Tools

The Enerpac ATM series Flange Alignment Tools are developed to rectify twist and rotational misalignment without additional stress in pipelines. Hydraulic cylinders, jacks and lifting wedges can also be used to assist in positioning and aligning.

Controlled tightening when external power is unavailable

Applications are often located where external power sources to drive air or electric powered tools are unavailable but controlled bolting is required, typically at values higher than an operator can generate using manual wrenches.

Manual Torque Multipliers

Enerpac E-series manual torque multipliers offer a range of output torques from manual inputs that can easily be achieved by an operator, providing accurate, efficient torque multiplication for make-up or break-out of joint fasteners.

Industrial Applications

Controlled Tightening of Multiple sized fasteners for industrial applications.

Hydraulic Torque Wrenches

Professional tools for industrial applications. Truly versatile tools which utilize standard Impact Sockets, optional direct Allen Drives or Interchangeable cassettes to provide controlled tightening of multiple sized fasteners per tool. Optional accessories further extend the application range of these products.

General Applications

Controlled Tightening of Multiple sized fasteners.

Hydraulic Torque Wrenches

Lightweight aluminium tools for controlled bolting.

Controlled Bolting

Increasing Health and Safety, Environmental and Productivity requirements demand even and parallel joint closure to ensure a sound assembly, especially on pressure containing vessels. This often requires the simultaneous tightening of multiple fasteners.

Bolt Tensioners

Enerpac GT Series Bolt Tensioners can achieve accurate preload in single or multiple fastener applications simultaneously, without inducing rotational twist or contending with the uncertainties of friction and lubrication.

Frozen or Corroded Nuts

Often nuts are difficult to remove, while loosening using tightening tools is possible,removal generally requires larger equipment and is time consuming. The use of cutting torches or hammers and chisels can cause damage to the joint components, requires significantly longer setup and operational time and can present a potential safety risk.

Hydraulic Nut Cutters

Nut splitting with the NC Series Hydraulic Nut Cutters is the safest method. It takes less time and avoids costly damage to joint components. The angled head design fitted with heavy-duty chisels permits the splitting of nuts on a wide variety of applications.

Joint Separation

Separation of stubborn joints for inspection and maintenance particularly those fitted with ring grooves or those with external forces acting on them are often difficult to separate. The use of hammers and wedges, chain blocks and lever bars can damage joint components and present a potential safety risk.

Parallel Wedge Spreaders

The FSH, FSM-Series parallel wedge spreaders offer controlled separation without bending or risk of slipping from the joint. The FS-Series spreaders are ideally suited to flanged joint applications.

Access the Enerpac Bolting Calculator, talk to our team about your project requirements, or you can download the ENERPAC Bolting Catalogue for product information and tips on:

Controlled Tightening and Loosening

Torque Tools

  • Manual Torque Wrench Multipliers
  • Hydraulic Square Drive Wrenches and Accessories, Steel
  • Hydraulic Hexagon Wrenches and Accessories, Steel
  • Hydraulic Square Drive Wrenches, Aluminium
  • Hydraulic Hexagon Cassette Wrenches, Aluminium
Torque Pumps
  • Selection Matrix
  • Portable Electric Torque Wrench Pump
  • Electric Torque Wrench Pumps
  • Compact Pneumatic Torque Wrench Pumps
  • Air Driven Torque Wrench Pumps

Tensioning Tools

  • Hydraulic Bolt Tensioners

Tensioning Pumps

  • Air Pump
  • Portable Hand Pump

Joint assembly and positioning

Cylinder Sets, Synchronized Positioning,Flange Alignment Tools

Joint Separation

Hydraulic Nut Cutters,Industrial Spreaders,Flange Spreaders,Wedgies and Spread Cylinders

Technical Information including:

Bolting Theory,Torque Tightening,Tensioning,Nut and Bolt Sizes and a Key to Measurement

 

Pumps and Accessories

A wide range of Pumps and Accessories are available including Manual, Air and Electrically operated pump units, hoses, gauges, manifolds and fittings.

 

Bolting Theory from ENERPAC

 

Function of Bolts and Nuts

Threaded fasteners are used across industry to assemble products ranging from pipelines to heavy-duty earth movers and from cranes to bridges and many more. Their principle function is to create a clamping force across the joint which is able to sustain the operating conditions without loosening.

Correctly tightened bolts make use of their elastic properties, to work well they must behave like springs. When load is applied, the bolt stretches and tries to return to its original length. This creates compressive force across the joint members.

 

Behavior of Bolts and Nuts

Elasticity is defined in Hooke’s Law of physics: The stress in a bolt is directly proportional to its strain. The stressstrain of a bolt has an elastic range and a plastic range. In the elastic range Hooke’s Law is true.

All of the elongation applied within the elastic range is relieved when the load is removed. The amount of elongation increases when more load is applied. When a bolt is stressed beyond its proof load (maximum load under which a bolt will behave in an elastic manner), the elastic elongation changes to plastic deformation and the strain will no longer be proportional to the stress.

In the plastic deformation a part of the elongation will remain after the load is removed. The point where this permanent elongation occurs is called the yield strength. The further application of load takes the bolt to a point where it begins to fail this is termed its ultimate tensile strength (UTS). At this UTS-point, if additional force is applied to the bolt it will continue to elongate until it finally breaks. The point at which the bolt breaks is called the tensile point. Careful attention must be paid to the grade of bolt being used as bolt grades differ in the elastic range.

Preload

The main purpose of a bolt and nut is to clamp parts together with the correct force to prevent loosening in operation. The term preload refers to the loading in a bolt immediately after it has been tightened. The amount of preload (residual load) is critical as the joint can fail if the load in the bolt is too high, too low or not uniform in every bolt.

Uneven bolt loads can result in:

  • Some bolts being loose while others are overloaded.
  • Crushing of the gasket on one side, leakage on the other side.

Preload is normally dictated by the joint design, for information on common joint types or contact Jonel.

 

Tightening Methods

Principally there are two modes of tightening: "Uncontrolled" and "Controlled".

Uncontrolled tightening
Uses equipment and/or procedures that cannot be measured. Preload is applied to a bolt and nut assembly using a hammer and spanner or other types of impact tools.
 		 Controlled tightening
Employs calibrated and measurable equipment, follows prescribed procedures and is carried out by trained personnel.		 There are two main techniques: Torque tightening and Bolt tensioning
1. Torque tightening
Achieves preload in a bolt and nut
assembly via the nut in a  controlled manner using a tool.
2. Bolt tensioning
Achieves preload in a bolt and nut assembly by stretching the bolt. axially using a tool.

 

Advantages of Controlled Tightening

 
Known, controllable and accurate bolt loads
Employs tooling with controllable outputs and adopts calculation to determine the required tool settings.
 
Uniformity of bolt loading
Especially important on gasketed joints as an even and consistent compression is required for the gasket to be effective.
 
Safe operation following prescribed procedures
Eliminates the dangerous activities of manual uncontrolled tightening and requires that the operators be skilled and follow procedures.
 
Reduces operational time resulting in increased productivity
Reduces tightening time and operator fatigue by replacing manual effort with the use of controlled tooling.
 
Reliable and repeatable results
Using calibrated, tested equipment, following procedures and employing skilled operators achieves known results consistently.
 
The right results first time
Many of the uncertainties surrounding in-service joint failures are removed by ensuring the correct assembly and tightening of the joint are carried out the first time.

 

For Bolting Solutions Think Enerpac
Jonel Hydraulics has over 25 years experience in RAM Reconditioning and Cylinder Repairs. We can also help with Industrial Tooling Sales, Hire and Advice; Mobile Services and Custom Builds.
Contact Jonel Hydraulics by email on sales@jonel.co.nz or phone +64 9 274 9296