Expansion Joints Are Our Sole Expertise...

Many manufacturers consider expansion joints as complementary components within their broad product portfolios.
Our difference begins right there;

We manufacture only expansion joints...

We have dedicated all our know how, production infrastructure, and software systems exclusively to this field.
This focus has enabled us to develop a unique capability to deliver solutions for complex, project-based applications.

Regardless of the type, size, material, or design parameters, if what you need is an expansion joint solution, we provide the fastest, most accurate, and most economical answer.

Because we truly understand you and your projects.

We understand the challenges you face in your project based works,

Because we speak the same language...

Expansion joint manufacturing demands precision engineering, the right material selection, and extensive experience.
We are a specialized team dedicated solely to designing, manufacturing, and developing custom expansion joint solutions for unique projects.

Our goal is simple: to deliver fast, accurate, and practical solutions to your on site needs without unnecessary procedures, and always with an engineer’s perspective.

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Close Communication

In large organizations, reaching the right person can be difficult. Sales representatives often lack deep technical knowledge, and getting clear answers to your technical questions can take days.

Our structure is different. We are a small, agile team composed entirely of engineers. This means that when you need an urgent solution in the field, you won’t be kept waiting, you can connect directly with our experts, instantly.

Your Flexible Solution Partner

At Flexysteel, we take pride in being your flexible solution partner.
Our commitment to excellence, combined with fast installation and leak-free performance, makes us the preferred choice for industries that demand reliable hose and expansion joint connections.

Corporate rigidity is not in our nature. Through our self-developed project management software and optimized workflow systems, we swiftly adapt to our customers’ evolving needs.

Project conditions may change — and we respond instantly to those changes. Because being flexible is not just part of what we do — it’s part of who we are.

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Expertise

Our team is composed of professionals with global experience in expansion joint design and manufacturing. Each member has worked on diverse projects and is well-versed in various international standards.

They are expert engineers in materials science, welding technology, FEM analysis, testing, and quality management.
We leverage this collective expertise to directly enhance the success of our customers’ projects.

Metal Bellows & Expansion Joints

Our Expertise

Our expansion joints are equipped with metal bellows engineered to absorb movements resulting from temperature fluctuations and vibrations. These bellows are meticulously designed to provide the necessary flexibility while withstanding peripheral pressure, offering a solution that not only maintains your pipelines but also protects your connected equipment.

Why Choose FlexySteel?

Quality Assurance: We adhere to industry standards such as EN14917:2021, EJMA 10th, and ASME Sec. VIII Div 1 to guarantee the quality and performance of our products.
Expert Design: Our team of experienced professionals excels in designing and producing bellows expansions tailored to your specific needs.
Protection and Efficiency: By absorbing high-stress magnitudes resulting from pipe expansion, contraction, equipment vibrations, or seismic activity, our expansion joints safeguard your infrastructure and maintain operational efficiency.

Explore our range

With a commitment to innovation, precision, and reliability, Flexysteel is your trusted partner in providing flexible solutions that ensure the longevity and performance of your pipelines and equipment.

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Engineering

At FlexySteel, our commitment to excellence goes beyond manufacturing exceptional products. We offer a comprehensive suite of engineering services that empower our clients to turn their ideas into reality. With a team of highly skilled engineers and cutting-edge technology, we are your trusted partner in engineering solutions.

Turning Vision into Reality

Your Trusted Partner for Engineering Excellence

Our commitment to excellence goes beyond manufacturing exceptional products. We offer a comprehensive suite of engineering services that empower our clients to turn their ideas into reality. With a team of highly skilled engineers and cutting-edge technology, we are your trusted partner in engineering solutions.

Our Engineering Services

Product Design: The cornerstone of any successful project is a well-conceived design. Our experienced design team works closely with you to conceptualize and develop products that meet your unique requirements. From initial sketches to detailed 3D models, we ensure that your vision is transformed into a tangible reality.
Project Management: Smooth project execution requires effective project management. Our project management experts handle every aspect of your project, from planning and scheduling to resource allocation and risk management. We keep your project on track, on time, and on budget.
Project-Based Product Development and Selection: Whether you're launching a new product line or optimizing an existing one, our team specializes in project-based product development and selection. We help you make informed decisions about materials, components, and processes to achieve the best results for your project.
Finite Element Analysis (FEA): FEA is a powerful tool for simulating and analyzing complex structural and mechanical systems. Our FEA experts use advanced software and simulation techniques to assess product performance, identify potential issues, and optimize designs for maximum efficiency and reliability.
Computational Fluid Dynamics (CFD) Analysis: Fluid dynamics play a crucial role in many engineering applications. Our CFD analysis services provide valuable insights into fluid behavior and its impact on your products or processes. We use CFD simulations to optimize designs, improve efficiency, and ensure safety.
CAD & CAM Activities: Our CAD and CAM activities encompass a wide range of services, including 2D and 3D drafting, computer-aided design, and computer-aided manufacturing. We leverage the latest software tools to streamline design and production processes, reducing lead times and costs.

Contact us today to explore how Flexysteel can be your engineering partner, helping you achieve your engineering goals and turn your visions into reality.

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The flexibility characteristics of an expansion joint are quantified by its stiffness (spring rate), which is directly influenced by the bellows geometry — including convolution shape, pitch, height, wall thickness, number of plies, and material properties. Flexysteel designs and manufactures bellows and expansion joints in full compliance with recognized international design and fabrication codes, such as those listed below:

EJMA, Edition:11
EN 14917:A1
ASME Sec. VIII. Div.1- App:26

Expansion joints are integral components of pressurized piping systems, designed to operate safely under internal pressure and cyclic mechanical loading. Accordingly, their design, fabrication, and testing are carried out in full compliance with the European Pressure Equipment Directive (PED 2014/68/EU), as well as relevant American design codes and standards, including:

ASME Boiler and Pressure Vessel Code, Section VIII Division 1 or Division 2 – Design and construction of pressure-retaining components.
ASME B31.1 – Power Piping – Applicable to high-pressure and high-temperature piping systems in power plants.
ASME B31.3 – Process Piping – Applicable to process and chemical plant installations.

This ensures that each expansion joint manufactured by Flexysteel meets the highest standards of safety, reliability, and regulatory compliance for use in critical pressurized systems.

Design & Construction:

Design Verification:

In certain cases, it may not be feasible to verify the pressure integrity of an expansion joint solely through the analytical methods defined in conventional design standards.

This limitation typically arises when the geometry of the expansion joint is highly complex, or when additional design optimization is required beyond the scope of standard analytical formulas. In such situations, Flexysteel performs advanced Finite Element Analysis (FEA) to evaluate and validate the structural integrity of the expansion joint under specified operating conditions.

Through detailed nonlinear, thermal, and fatigue simulations, critical parameters such as stress distribution, deformation behavior, and stability are accurately assessed, ensuring full compliance with applicable design codes and safety requirements.

Flexysteel utilizes its extensive expertise in metal bellows engineering to achieve optimal mechanical performance, fatigue resistance, and extended service life under demanding operating conditions. Expansion joints are critical components in piping systems, designed to absorb thermal growth, mechanical vibration, and system misalignment. By introducing the necessary flexibility at predefined points, they effectively reduce stress concentrations that would otherwise occur within the pipeline or connected equipment.

A strong commitment to quality has always been a core element of Flexysteel’s mission. The company is recognized not only for its superior product reliability and performance, but also for its modern, fully integrated manufacturing facilities.

Over the past 15 years, Flexysteel’s engineering team has designed and manufactured more than 10,000 customized expansion joints, each tailored to meet specific operational and environmental requirements across various industries.

The company’s production capabilities can be summarized as follows:Size: Up to OD 6000mm

Lifting Capacity: 20 Tons
Pressure: Up to 100 Bar
Temperature: Up to 800 C˚ (Austenitic Steels), 900 C˚ (Nickel Alloys)

Flexysteel’s production facilities are fully capable of welding a wide range of materials, including high-alloy alloys, starting from a minimum thickness of 0.25 mm

Manufacturing Capacity

Welding:

As Flexysteel frequently participates in projects where expansion joints are critical components, we recognize the essential role of comprehensive supporting documentation. Accordingly, project deliverables typically include:

Detailed quotations specifying scope, materials, and technical requirements,
Supporting calculations to validate design and performance criteria,
Extensive quality control protocols, including inspection and testing procedures,
Traceable documentation for each stage of manufacturing and assembly.

Flexysteel’s welding specialists hold at minimum International Welding Inspector (IWI) certification, enabling them to conduct in-process welding inspections in compliance with international standards.

Furthermore, Flexysteel is fully capable of preparing Welding Procedure Specifications (WPS) and Welding Procedure Qualification Records (WPQR) in accordance with multiple international welding codes such as EN 15600 series, ASME sec IX.

Welding operations are performed using a combination of automated and manual processes, strictly in accordance with approved Welding Procedure Specifications (WPS), which are certified by Flexysteel’s welding specialists and endorsed by independent third-party inspectors.

Typical Quality Tests Include:

Destructive Tests:

Life Cycle Testing – to validate operational durability and fatigue performance.
Burst Testing – to verify the structural integrity under extreme internal pressure, e.g., for vessels and offshore platforms.

Non-Destructive Tests (NDT):

Visual Inspection (VT)
Dye Penetrant Testing (PT)
Radiographic Examination (RT)
Magnetic Particle Testing (MT)
Ultrasonic Testing (UT)
Hardness Testing
Positive Material Identification (PMI) – for all material grades and applications.

Proof Tests:

Air Leak Test
Helium and Formier Gas Leak Test
Hydrostatic Pressure Test – applicable to all systems and operational conditions.

ITP & Testing

The Inspection and Test Plan (ITP), generated by Flexysteel’s Quality Management System, ensures that all stages of manufacturing include appropriate inspection points, including Hold and Witness points as required.

Depending on the applicable manufacturing codes, project specifications, operating media, and classification society rules, Flexysteel conducts a comprehensive range of quality tests, including destructive, non-destructive, and proof testing. All tests may be witnessed by third-party inspectors, in accordance with customer and classification requirements.

Unlocking the Power of Precision

EJMA Calculation and Product Selection Assistance

At Flexysteel, we're dedicated to providing our customers with the highest quality bellows solutions, tailored precisely to their needs. We understand that each application is unique, and that's why we offer a complimentary Bellows Design Service for our potential clients.

How It Works?

Getting started is easy. Simply send us your design parameters, and our team of experienced engineers will work diligently to provide you with the best bellows design for your application. Our comprehensive service takes into account a range of critical factors, including:

Bellows Internal & External Diameter: We'll help you determine the ideal dimensions to ensure a perfect fit for your system.
Life Cycle: We calculate the expected fatique life (min.1000).
Inplane Instability: Our analysis ensures your bellows can withstand various pressures and conditions without buckling.
Column Instability: We evaluate column strength to prevent structural issues.
Axial Spring Rate: We provide data on the bellows' compressibility to meet your performance requirements.
Lateral Spring Rate: Ensuring flexibility and responsiveness to lateral forces is essential, and we've got it covered.
Angular Spring Rate: Our experts calculate the angular spring rate for precision performance.

Our Commitment to Excellence

At Flexysteel, we don't just stop at providing you with the optimal bellows design. We take pride in delivering the best possible product to match your specifications. Quality is our cornerstone, and your satisfaction is our priority.

Ensuring Excellence in Every Product

Quality, not quantity

We take immense pride in our commitment to delivering top-notch products that meet and exceed the highest industry standards. With a rich history spanning [mention the number of years], our dedication to quality has made us a trusted name in the field of metal bellows, flexible metal hoses, and Rubber & Fabric expansion joints.

Our Commitment to Quality

At the heart of our success lies our unwavering commitment to product quality. We understand that your applications demand reliability, durability, and precision. That's why we leave no stone unturned in ensuring that every component we produce is of the highest quality.

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Services and history

At FlexySteel, we engineer reliability into every joint, every weld, and every project we deliver. We are a project-driven engineering and manufacturing company specializing in metal expansion joints, flexible hoses, and engineered connection systems designed for demanding industrial environments.

Over the past 15+ years, our team has successfully completed more than 100 large-scale projects and manufactured over 10,000 custom-designed expansion joints — each one engineered to meet exact client specifications and international standards.

From Asia to the Americas, FlexySteel products are in operation across diverse industries and geographies, quietly proving their performance under real-world conditions.

Project-Based Expertise

Our strength lies in our deep project management experience. We understand that engineered components are only as good as the process behind them. That’s why we apply the same discipline and traceability to documentation, testing and quality assurance as we do to design and fabrication.

Every project we deliver is guided by certified engineers and project managers who ensure full compliance with international standards such as EJMA, EN 14917, and ASME Sec. VIII Div. 1 App. 26.

From design validation and document control to Inspection Test Plans, FAT coordination, and third-party witnessing, we provide an end-to-end project support framework trusted by EPC contractors and plant operators worldwide.

Our Vision

As global industries move toward higher efficiency, sustainability and digital integration, FlexySteel continues to invest in advanced design software, simulation tools, and digital project management systems.

Our goal is simple — to remain the preferred partner for engineered flexible connection systems in projects where reliability, precision and accountability define success.

Why FlexySteel

Engineering at the core: Each product is designed, calculated and validated by experienced mechanical and welding engineers.
Proven project record: 100+ successful projects, 10,000+ customized units delivered across multiple continents.
Comprehensive project management: From first design input to commissioning documentation, every phase is traceable and controlled.
Regional support: Engineering offices in Turkey and Europe provide real-time collaboration and local expertise.
Uncompromising quality: Every weld, test and inspection point meets or exceeds international standards.

Regional Presence, Global Reach

With sales and engineering offices in Turkey and Europe, FlexySteel maintains close collaboration with clients throughout every project phase. This regional structure allows us to provide immediate technical assistance, on-site consultation, and rapid design revisions, ensuring that even complex, time-critical projects stay on track.

Our presence across multiple markets enables us to respond with agility while maintaining global manufacturing and quality consistency. Whether your facility is in Hamburg, Istanbul, Singapore or Houston — our engineering footprint and project records prove our capability worldwide.