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Experience Top-Quality Equipment with ESI’s Premier Flange Spreaders

Traditional ways of spreading a flange versus the step wedge flange spreader

Assert Your Authority & Take Back Control with Step Wedge Flange Spreaders!

Newton’s First Law states, “An object at rest remains at rest, and an object in motion remains in motion at constant velocity unless acted upon by an unbalanced force.” Similarly, Newton’s Third Law asserts, “For every action, there is an equal and opposite reaction.” These principles highlight the importance of precision in force application.

At ESI, we provide flange spreaders that empower operators to apply force with precision, ensuring controlled and measured force is used for every task, aligning with the core principles of physics for optimal results.

Advantages of Choosing ESI’s Flange Spreaders

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We offer a full line of innovative tools designed for making flange maintenance safer and easier. Among the most popular are their line of Step Wedge Flange Spreaders. They offer both hydraulic and mechanical options.

The Step Wedge’s unique design allows the operator to perform the task in a controlled and predictable manner. Each Spreader, like others has a handle, but unique to their flange spreader, they include high quality soft grip technology to avoid hand fatigue in difficult locations.

Hydraulic options include a hydraulic hand pump with “Sealed Bladder” technology. What this means is that you can hold or secure the pump to any object or apparatus without worrying about leakage or air locks. Twin Kits include dual port hydraulic, which reduces the need for additional operators and guarantees an even spread on each side of the flange.


Applications Include:

Hydraulic flange spreaders are versatile tools used across various industries for tasks that require the separation of flange joints.

  • Flange facing: Resurfacing flange faces for maintenance purposes.
  • Pipeline maintenance and construction: For spreading pipe flanges during repair or replacement of gaskets and valves.
  • Pressure vessel servicing: Accessing the internals of pressure vessels for maintenance or modification.
  • Power plant operations: Maintenance and repair of various equipment within power plants.
  • Offshore platforms: Performing maintenance tasks on flanged connections in offshore oil and gas operations.

ESI's Flange Spreaders: Safety - Precision - Efficiency

Step Wedge Flange Spreader on a flange
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Hydraulic Twin Step Wedge
Flange Spreader & Pump Kit

  • Robust Spreading Capability: Delivers a formidable ( 37,478 – 53,950 ) foot-pounds per wedge, equivalent to ( 17 – 25 ) tons of force, ensuring powerful and efficient spreading.
  • Enhanced Safety:  Engineered to eliminate pinch points, enhancing user safety during operation. Engineered to counteract natural forces, our flange spreaders eliminate the risk of ejection, setting a new standard in operational security compared to older models. 
  • Versatile Fit: Accommodates narrow openings as slim as ( 0.24″ ) and expands to fit wider gaps with the integration of step blocks, offering flexibility across various applications.
  • Increased Efficiency: Transforming lengthy procedures that once spanned hours or even days into swift minutes, our flange spreaders drastically cut down on operational downtime.
  • Simplified Operations: Tasks that were once intricate and demanding are now effortlessly manageable.
SWI2025TI on a Flange
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Streamlined Efficiency: The Hydraulic Step Wedge Flange Spreader with Built-In Pump

Designed initially for underwater use by divers, this flange spreader has expanded its utility to a variety of challenging environments. It proves invaluable for flanges situated in hard-to-reach areas or at towering heights. The task of transporting an 80-pound case can be formidable, and when the work site is situated 100 feet above ground, the challenge intensifies. However, the integrated pump feature is a game-changer, offering ease of operation that minimizes operator fatigue and significantly reduces the risk of accidents. 

Key Attributes:

  • Integrated Pump: Enhances operational readiness.
  • Substantial Force: Models can generate between 17 – 25 tons of spreading power.
  • Safety Enhancements: Includes a safety lanyard and blocks for secure operations.

Mechanical Step Wedge Flange Spreader

Distinctive Features:

  • Pinch-Point Free: Ensures a safer user experience by design.
  • Precision Tooling: Equipped with a calibrated torque wrench for accurate force application.

Key Advantages:

  • Operator Safety: Prioritizes the operator’s safety with its thoughtful design.
  • Enhanced Control: Offers superior control during operation, enhancing precision and efficiency.
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Tailored Flange Spreaders Solutions for Complex Tasks

Hydraulic Step Wedge Flange Spreader - Mini Gap 8.7 Ton

Hydraulic 8.7 Ton Mini Gap Step Wedge Flange Spreader with Integrated Pump

The Mini Gap Step Wedge Flange Spreader boasts a unique design that enables it to operate in flanges where traditional spreaders are ineffective. Its capacity to accommodate gaps of 0.16 inches or wider provides operators with a tool that combines the adaptability of the Pop It with the robust safety and enduring durability of the step wedge flange spreader.

Safety Features:

  • Pinch-Point Protection: Designed to eliminate finger pinch-points for safer operation.
  • Enhanced Step Security: Boasts deeper steps on the upper levels for increased stability.
  • Durability and Dependability: Constructed with forged key components to ensure strength and long-term reliability.

Maintenance Features:

  • Efficient Servicing: Allows for quick disassembly and reassembly, facilitating maintenance.
  • Improved Tool Longevity: Features narrow jaw teeth to enhance tool durability.
  • Minimal Clearance Requirement: Operates effectively with a minimal gap of 0.16 inches.
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Hydraulic Mini Gap Flange Spreader (AKA Pop It) – 5 Tons

The Hydraulic Mini-Gap Auto-Spreader is expertly crafted to navigate the tight spaces between flanges that are inaccessible to conventional wedges and spreaders. Its robust 5-ton cylinder is designed for maximum strength and enduring durability, ensuring reliable performance. For tasks requiring additional power, the Twin Kit option amplifies the spreading force to an impressive 10 tons, providing operators with enhanced capability for even the most demanding applications.

 Key Features:

  • Pinch-Point Free Design: Enhances safety and ease of use.
  • Accommodates Minimal Gaps: Efficiently fits into spaces as narrow as 3/32″.
  • Hydraulic Cylinder: Provides robust and reliable performance.

Primary Benefits:

  • Reduces Operator Fatigue: Designed for comfort and prolonged use without strain.
  • Flexible Application: Adapts to a variety of situations with ease.
  • Control and Precision: Delivers exact spreading with meticulous accuracy.

Zero Gap Bolt Hole Flange Spreader

For years, maintaining flanges, especially those without gaps, was a daunting task. Traditional methods involving cranes, pulleys, and crowbars not only posed significant safety risks but also demanded an excessive amount of time and labor. Enter SG Collet Technology – the game-changer in flange maintenance. 

Safe and Efficient Operations SG Collet Technology is engineered to provide operators with a safe and efficient solution for maintaining challenging flange joints. Innovative Design for a Firm Grip The tool’s innovative design allows you to insert the arms into the bolt hole easily. Whether you’re manually tightening or using a hydraulic pump, the collets expand seamlessly inside the bolt hole, securing a firm grip from within. This ensures a stable and reliable setup, essential for the task at hand. 

Key Features:

  • Internal Grip: Collets firmly secure the flange from within the bolt hole.
  • Size Versatility: A variety of collet sizes to accommodate different bolt hole dimensions.
  • Precision Instrumentation: The kit comes with a calibrated torque wrench for precise force measurement.

Main Benefits:

  • Gapless Spreading: Efficiently spreads flanges without leaving any gaps.
  • Reliability: Built to last, ensuring durability and dependability.
  • Precision: Offers controlled and precise operation for optimal results.
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Valve out Tool

Valve Removal Kit

The valve removal tool is engineered for operators to execute valve replacements with meticulous precision and control. Offering an economical solution without compromising on safety or performance, this tool is both lightweight and compact. Its standout feature is its remarkable versatility, accommodating valve changes for sizes up to 26 inches in class 150 or 20 inches in class 300.

Applications Include: Valves. Spools, Expansion Joints, Rupture Disks, Meters, Regulators.


  • Precision Engineering: Tailored to access narrow flange gaps where standard tools can’t reach.
  • Durability: Constructed for longevity, even under rigorous use.
  • Twin Kit : Even Spread on each side of flange



  • Enhanced Accessibility: Facilitates work in confined spaces, increasing the range of applications.
  • Powerful Performance: Ensures tasks are completed efficiently, without compromising on force.
  • Long-Term Reliability: Reduces the need for frequent replacements or repairs.
  • Versatile Use: Adapts to various industrial needs with the additional power option, making it a valuable tool for a wide array of jobs.


Zero Gap Flange Spreader

The Zero Gap Flange Spreader employs a precision-calibrated torque wrench, enabling operators to separate flanges with unparalleled control. This innovative design eliminates the necessity for hammering wedges or leveraging makeshift tools, ensuring a seamless and secure operation.

This tool is designed to optimize the flange separation process, ensuring that operators can perform their tasks with precision and safety, leading to a more efficient and secure working environment.


  • Precision-Calibrated Torque Wrench: Allows for exact control during flange separation.
  • Innovative Design: Streamlines the process by removing the need for traditional wedges or prying tools.


  • Unparalleled Control: Operators can achieve precise flange separation with ease.
  • Seamless Operation: Enhances workplace efficiency by providing a smooth, controlled spreading action.
  • Increased Safety: Reduces the risk of injury associated with hammering or prying, promoting a safer work environment.
  • Time-Saving: Minimizes downtime by simplifying the flange separation process.


Zero Gap Mechanical Flange Spreader