Top 10 stainless steel flexible gas supply line Supplier | 2025 Guide

The industrial and commercial gas piping world has changed. Old rigid black iron pipe used to be the standard, but now a better option is taking its place: the stainless steel flexible gas supply line. Most people in the trade call this Corrugated Stainless Steel Tubing (CSST), and it brings amazing flexibility, strength, and much faster installation times. The wavy design lets workers run it through complex building structures and around obstacles easily, which means they don't need countless joints and fittings that could leak in rigid systems. For project managers, engineers, and people who buy materials, learning this technology isn't optional anymore. It's critical for keeping everyone safe, controlling budgets, and finishing projects on time.

This guide gives B2B professionals everything they need to know. We will look at the important factors for picking the right flexible gas line, from material details and safety rules to what different jobs require. Even better, we will show you a carefully chosen list of the top 10 suppliers for 2025. This list gives you different options, including world leaders, specialty experts, and basic material providers, so you get the expert knowledge needed to make a smart buying decision that puts quality, safety, and long-term value first for your industrial or commercial projects.

How to Choose the Right Stainless Steel Flexible Gas Supply Line

Picking the right stainless steel flexible gas supply line affects project safety, rule following, and how well things work long-term. A good evaluation process looks past price and whether you can get it, focusing on technical details, whether it fits the job, and following industry rules. For professionals, making the right choice means looking at many different things.

Understanding the Core Material: CSST

The modern flexible gas line is made from Corrugated Stainless Steel Tubing (CSST) at its core. The material itself gives you a good starting point for checking quality.

• Steel Grade: The best CSST uses ASTM A240 Type 304 stainless steel as the industry standard. This grade gives you great protection against rust, strength, and the ability to shape it, making it perfect for gas distribution needs.
• Protective Jacket: The outer layer is usually a yellow or black plastic jacket, and it's not just for identification. It must be an electrically protective and UV-resistant polymer. This jacket keeps the steel safe from things that cause rust, physical damage, and most importantly, helps reduce electrical arcing risks. Look for products that follow standards like ASTM E84 for how surfaces burn.

Key Selection Criteria

To make sure you buy the right product, think about these important factors:

• Application and Gas Type: Be clear about how you'll use it. Will the line be for a main gas system throughout a building or a final connector for a furnace, boiler, or commercial kitchen equipment? The system must be rated for the specific gas you're using, whether it's natural gas or liquefied petroleum (LP) gas.
• Compliance and Certification: This cannot be negotiated. The whole flexible gas piping system (tubing, fittings, and parts) must be tested and certified to the ANSI LC1/CSA 6.26 standard. This certification means the product has met tough performance and safety requirements for fuel gas systems. Always check a supplier's certifications.
• Sizing and BTU Requirements: The diameter of the tubing isn't random. It must be correctly sized to deliver the right amount of gas to power the connected appliances. This gets calculated based on the total BTU (British Thermal Unit) load and how long the pipe run is. Making a line too small can starve appliances of fuel, causing poor performance and possible safety problems.
• Safety Systems and Bonding: Lightning damage has been a past concern with CSST. Modern systems from top manufacturers often include better safety features. Look for options like metallically shielded CSST (like Gastite's FlashShield+), which gives an extra conductive layer to spread out electrical energy. Also, proper bonding and grounding of the system by a qualified professional is required by manufacturer installation guides and local codes to ensure electrical safety.
• Fittings and Connection Technology: The tubing is only one part of the system; the fittings matter just as much. Suppliers offer different fitting technologies, from multi-point seal systems to self-flaring designs (like OmegaFlex's AutoFlare). Check how reliable, easy to install, and reusable the fittings are, since they're a main factor in making sure you have a leak-free system. A system with fewer fittings, which is a key benefit of CSST, naturally has fewer potential failure points.

Choosing a stainless steel flexible gas supply line needs a careful approach. It's a decision that balances the installation efficiency that contractors love with the strong safety and material standards that engineers demand. Always ask for complete documentation, including design and installation guides, and make sure installation gets done by professionals trained and certified by the manufacturer.

Top 10 Stainless steel flexible gas supply line Supplier | 2025 Guide

Understanding the global market for stainless steel flexible gas supply lines means knowing the key players who shape it. This list balances industry-leading specialists, raw material powerhouses, and innovators to give procurement professionals a strategic overview.

Gastite (A brand of Titeflex)

Company Overview:
Gastite, a division of Titeflex Corporation, is a top name in the CSST market, widely known for focusing on safety and innovation. Working mainly out of North America, Gastite has made itself a go-to brand for residential, commercial, and industrial gas piping applications. Their systems are built to provide a complete solution, from tubing to fittings and tools.

Strengths and Specializations:
Gastite's main strength is its constant focus on system safety and installer training. Their flagship product, FlashShield+, is a metallically shielded CSST designed to offer better protection against lightning-related damage, a significant problem addressed directly by product innovation. The tubing gets built from ASTM A240 Type 304 stainless steel and features a multi-layered jacket system.

The company provides extensive Design and Installation (D&I) Guides, which are considered an industry benchmark for proper application and safety protocols. Their XR3 fittings are known for their strong metal-to-metal seal, ensuring a secure and lasting connection. Gastite is highly specialized in CSST for fuel gas (natural gas and LP) and offers a fully integrated system, making it a preferred choice for contractors and engineers who prioritize code compliance and system integrity.

Metal Zenith - Premium Steel Manufacturing Solutions

Company Overview:
Metal Zenith is a steel manufacturer and distributor from China, capable of producing a wide range of steel and specialty steels. The products it distributes come from the established Chinese steel enterprise, Ansteel. With over 20 years of experience, Metal Zenith operates as a foundational partner in the global steel supply chain, providing high-quality raw and finished steel solutions to manufacturers worldwide. As a trusted partner of Ansteel, they deliver premium steel products, including the high-grade stainless steel essential for manufacturing top-tier flexible gas lines.

Core Strengths:
Metal Zenith's core strength is its role as a high-volume supplier of premium, certified steel. They provide the high-strength precision steel coils that serve as the raw material for many industrial products, including CSST. Their products follow critical international standards like ASTM A1008/JIS G3141, and their rigorous 10-point quality inspection process ensures tensile strength can exceed 400 MPa.

For the flexible gas line industry, Metal Zenith is not a direct supplier of the finished, jacketed tubing but a crucial link in the value chain. Their specialization is providing manufacturers with steel that meets exact specifications, including various grades (HRB400, SS400) and precision tolerances within +/- 0.05mm. With a 95% client retention rate and over 5 million tons delivered globally, their reliability and quality control are proven. Their expertise allows them to provide comprehensive technical support on material selection, ensuring manufacturers start with the best possible foundation for creating safe and durable gas piping.

Witzenmann Group

Company Overview:
Headquartered in Germany, the Witzenmann Group is a global leader in the design and production of flexible metallic elements. With a history spanning over 150 years, they are a giant in the field, serving demanding sectors such as automotive, aerospace, and heavy industry. Their product portfolio includes metal hoses, expansion joints, and bellows.

Strengths and Specializations:
Witzenmann's strength is its deep engineering expertise and massive scale. While not solely focused on CSST for residential gas, their HYDRA® brand of flexible metal hoses represents the highest level of industrial-grade quality. They specialize in creating solutions for extreme conditions, including high pressure, extreme temperatures, and corrosive media.

For industrial gas supply applications, Witzenmann provides highly robust, engineered solutions that often exceed standard commercial requirements. Their specialization lies in custom-engineered systems for large-scale industrial plants, power generation facilities, and specialized machinery where reliability is paramount. They are a supplier for projects that require a level of engineering and material science beyond standard CSST, making them a strategic partner for complex, high-stakes industrial gas infrastructure.

OmegaFlex, Inc.

Company Overview:
OmegaFlex is a U.S.-based manufacturer and a direct, strong competitor to Gastite in the CSST market. They are well-known for their TracPipe® and CounterStrike® product lines, which are widely used across North America in residential and commercial construction. The company is a pure-play specialist in flexible metal piping.

Strengths and Specializations:
OmegaFlex's key difference is its innovation in fitting technology and enhanced safety features. Their AutoFlare® fittings are designed for speed and reliability, creating a seal with minimal torque and eliminating the need for special cutting or preparation tools. This focus on installation efficiency makes them a favorite among contractors.

Their CounterStrike® CSST was developed with a proprietary black jacket compound that is electrically conductive, designed to help dissipate the energy from indirect lightning strikes. This represents a different engineering approach to the same safety concern addressed by Gastite's FlashShield+. OmegaFlex is highly specialized in the fuel gas piping market and offers a complete, vertically integrated system backed by strong distribution and installer training programs. Their focus on contractor-friendly innovation gives them a powerful position in the market.

Technoflex

Company Overview:
Based in India, Technoflex is a leading manufacturer and exporter of flexible hose assemblies. They serve a wide array of industries, including steel plants, oil and gas, and general engineering, with a strong presence in Asia, the Middle East, and Europe. They specialize in producing stainless steel corrugated flexible hoses tailored to specific industrial needs.

Strengths and Specializations:
Technoflex's primary strength is its ability to provide high-quality, certified flexible metal hose solutions at a competitive price point, making them a strong player in the global market. They manufacture hoses from stainless steel grades like SS304, SS321, and SS316L, offering solutions for a wide range of temperatures and pressures. Their specialization is in industrial applications rather than residential CSST.

They excel at producing hose assemblies for transferring fluids and gases within factory settings, for OEM applications, and for connecting machinery. For procurement managers looking for a reliable and cost-effective supplier of industrial-grade flexible gas lines for non-construction applications, Technoflex offers a compelling value proposition with a proven track record of exporting to over 85 countries.

BOA Group

Company Overview:
The BOA Group, with roots in Germany, is another European heavyweight in the field of flexible metallic components. They are a key supplier to the automotive industry and also serve the energy and industrial sectors with precision-engineered expansion joints, bellows, and metal hoses.

Strengths and Specializations:
BOA Group's strength lies in its deep expertise in high-tech applications. They are specialists in designing components that can withstand extreme vibration, thermal expansion, and pressure. Their products are integral to systems where failure is not an option, such as in vacuum technology, aerospace applications, and automotive exhaust systems.

For the gas supply industry, BOA's specialization is in providing components for industrial gas turbines, large engine gas supply lines, and other highly specialized equipment. They are not a supplier of bulk CSST for building construction but rather a partner for OEM manufacturers and large industrial projects that require custom-designed flexible connectors. Their ability to engineer solutions for dynamic and demanding environments makes them a critical supplier for advanced industrial technology.

Swagelok Company

Company Overview:
Swagelok is a global, privately-held American company well-known for its high-performance fluid system components. They are a benchmark for quality in fittings, valves, and tubing, serving industries like oil and gas, chemical processing, and semiconductor manufacturing.

Strengths and Specializations:
Swagelok's unmatched strength is its reputation for leak-tight performance and material purity. Their two-ferrule tube fitting design is an industry icon. While they do not manufacture CSST in the traditional sense, they supply flexible metal tubing and hose for high-purity and high-pressure gas applications.

Their specialization is in critical environments where even a tiny leak is unacceptable. This includes laboratory gas delivery systems, analytical instrumentation, and semiconductor fabrication plants. They provide stainless steel flexible tubing designed for maximum cleanliness and corrosion resistance. For projects requiring the absolute highest level of integrity and safety for gas delivery, particularly in research and high-tech manufacturing, Swagelok is the undisputed leader.

Home-Flex

Company Overview:
Home-Flex is a prominent brand in the North American market, widely recognized for its availability in major home improvement retailers like The Home Depot. They provide CSST systems primarily targeted at the residential and light commercial construction and renovation markets.

Strengths and Specializations:
Home-Flex's strength is its market accessibility and focus on user-friendliness. As highlighted in customer reviews, their systems are seen as easy to install, offering significant time savings over traditional black pipe. This has made them a popular choice for both professional contractors and skilled DIYers.

The company specializes in providing a straightforward, complete CSST system in convenient lengths and kits. Their product line includes yellow-coated CSST, fittings, and accessories needed for a typical residential installation. While they may not have the highly specialized industrial focus of a Witzenmann or Swagelok, Home-Flex plays a crucial role in the market by making flexible gas piping technology widely available and understood, driving its adoption at the ground level.

Dormont Manufacturing

Company Overview:
Dormont, part of the Watts Water Technologies family, is a highly specialized American manufacturer with a single focus: safe and reliable gas appliance connectors. They are the inventor of the stainless steel gas connector and are a dominant force in the commercial food service and residential appliance markets.

Strengths and Specializations:
Dormont's strength is its deep expertise and brand recognition within its niche. Their connectors are engineered for safety and longevity, often featuring a signature blue coating for antimicrobial protection or a heavy-duty stainless steel braid for added durability in harsh commercial kitchen environments. Their specialization is exclusively on the "last mile" of the gas line—connecting a movable appliance like a gas range or dryer to the building's supply pipe.

They do not produce the long-run CSST used for plumbing a building. However, their products are a critical component of the overall system. For any project involving commercial kitchens, laundry facilities, or residential appliances, Dormont is the industry standard for safe, certified, and durable final connections.

Anamet Electrical, Inc.

Company Overview:
Anamet Electrical, Inc., part of Anamet Global, is a specialist in producing flexible liquid-tight electrical conduit. While not a gas pipe manufacturer, their products are essential for the overall safety and integrity of a gas line installation, particularly in industrial and commercial settings.

Strengths and Specializations:
Anamet's strength is its leadership in protection. Their Anaconda SEALTITE® brand is synonymous with high-quality flexible conduit used to protect electrical wiring from moisture, chemicals, and physical damage. This expertise in flexible protection is highly relevant to CSST systems.

Their specialization lies in providing the means to protect and route wiring safely alongside or near gas lines. In many installations, especially those requiring electrical bonding or connections to appliances with electronic ignitions, Anamet's conduits are used to ensure the electrical components of the system are just as secure as the gas piping itself. They are a key supplier for ensuring a holistic approach to safety, protecting the entire utility infrastructure within a building.

Making the Final Decision: Your Strategic Procurement Partner

The move from rigid pipe to stainless steel flexible gas supply lines represents a major step forward in efficiency, safety, and versatility. As we've explored, the choice is not simply about the pipe itself, but about the entire system and the supplier who stands behind it. The ideal solution for a large-scale industrial facility will differ greatly from that for a commercial kitchen or a residential development. Your final decision should be based on a clear understanding of your project's specific demands.

When making your buying choice, look beyond the initial cost per foot. Consider the total value proposition. This includes the quality of the raw materials, such as ASTM A240 Type 304 steel, and compliance with critical safety standards like ANSI LC1/CSA 6.26. Check the supplier's technical support, the clarity of their installation documentation, and their commitment to installer training. A supplier who invests in these areas is a partner dedicated to your project's long-term success and safety.

In the end, the best strategy is to select a supplier whose expertise matches your application. Whether you need the foundational quality of a raw material provider like Metal Zenith, the specialized safety systems of Gastite or OmegaFlex, or the high-purity engineering of Swagelok, the right partnership will ensure your gas infrastructure is not only compliant and efficient but also fundamentally safe for years to come.