Interalloy is your Swiss partner for stainless steel high-pressure tubes – precision-manufactured, individually assembled and consistently designed to meet the highest requirements. Our seamless high-pressure tubes meet industrial, chemical, and hydraulic requirements up to the ultra-high-pressure range. You benefit from custom manufacturing, precise quality assurance, and a broad range of materials designed for durability, safety, and media-resistant performance.
Our high-pressure tube portfolio at a glance
Our high-pressure tubes are available in a wide range of dimensions, materials, and designs—always tailored to the requirements of your application. Thanks to state-of-the-art cold forming technologies, we manufacture seamless precision tubes for operating pressures up to 60,000 psi (4,140 bar)—optionally also for ultra-high-pressure ranges up to 100,000 psi.
Dimensions and pressure ratings from 20,000 to 60,000 psi
We offer high-pressure tubes in standard diameters from ¼″ to 1″ (6.35 mm to 25.4 mm) – also available in finer tolerances and special dimensions on request. Wall thicknesses vary depending on the pressure class and medium. We rely on tight manufacturing tolerances that enable reliable further processing and assembly.
Our product options include:
- Medium pressure pipes for up to 20,000 psi (e.g., instrumentation lines)
- High-pressure pipes for up to 60,000 psi (e.g., for hydraulics, test benches)
- Special solutions for ultra-high pressure with additional safety reserves
Available delivery lengths:
- Manufacturing lengths: typically 5–7 meters
- Fixed lengths & cut-to-length: according to customer requirements
- Finished parts: including CNC machining, cone threads, drill holes, or welding preparation
Materials: 316L, duplex, and special alloys
We use AISI 316L (1.4404) as our standard material – a corrosion-resistant, molybdenum-alloyed stainless steel with excellent media compatibility.
In addition, we also carry out projects with:
- Duplex and super duplex steels for offshore and chloride-contaminated environments
- Nickel-based alloys (e.g., Hastelloy®, Inconel®) for extreme temperatures and aggressive media
- Titanium pipes for cryogenic or high-purity applications
- Special alloys in accordance with NACE MR0175 or ISO 15156 for hydrogen and hydrogen sulfide environments
Our materials warehouse contains more than 1,500 items, ensuring fast availability and the shortest possible delivery times – even for demanding material combinations.
High-pressure stainless steel pipe: advantages and technical features
High-pressure stainless steel tubes offer decisive advantages over conventional pipe types—especially when high demands are placed on pressure resistance, corrosion resistance, and service life. Interalloy supplies only seamless high-pressure tubes that are cold-drawn or cold-redrawn under controlled conditions—a guarantee for maximum safety, repeatability, and performance.
Corrosion and temperature resistance
Our stainless steel pipes are ideal for aggressive and extremely high-temperature media – whether in chemical process engineering, offshore applications, or cryogenic processes:
- Temperature range: –252 °C to +649 °C
- Resistant to: Chlorides, acids, alkalis, salt water, oil, and gases
- Suitable for: High-temperature pipes, nitrogen and hydrogen systems
With materials such as 316L, duplex, or nickel-based alloys, we also meet requirements in highly corrosive environments, such as those found in seawater desalination or H₂ distribution networks.
Seamless manufacturing for maximum safety
Seamless high-pressure pipes eliminate the risk of weld seam failure—an essential factor for systems with high pressure and dynamic loads. Our manufacturing technology enables us to achieve:
- Uniform material structure, free of weld burrs or cavities
- Increased fatigue strength, especially under alternating pressure loads
- Precise inner surfaces, ideal for hydraulic fluids and media with high viscosity
Depending on the application, autofrettage can also be used to strengthen the inner wall by prestressing it – a proven method for increasing fatigue strength in high-pressure applications.
High-pressure tube applications in industry and research
Our high-pressure tubes are used wherever reliability under extreme conditions is required – whether in industrial series production, plant engineering, or highly specialized research environments. The combination of material expertise, pressure resistance, and precise manufacturing makes our high-pressure tubes an indispensable component in critical systems.
Hydraulics, water jet cutting, and cleaning systems
In industrial practice, high-pressure tubes are used in the following areas, among others:
- Hydraulic systems and pressure test benches – for fluids up to 4,140 bar
- Water jet cutting machines – especially with cone & thread connections at up to 60,000 psi
- High-pressure cleaning – e.g., in the food and pharmaceutical industries
Precise matching to the pressure class and medium minimizes leakage risks and extends service intervals – decisive criteria for operators of plants with continuous 24/7 operation.
Hydrogen infrastructure up to 1,000 bar
The hydrogen economy is a promising growth area – both in the mobile and stationary sectors. High-pressure pipes are used here in the following areas in particular:
- Fuel station infrastructure: H₂ filling lines with up to 1,000 bar
- Compact modules and dispenser systems
- Electrolyzers and storage solutions
Our high-pressure stainless steel pipes meet the technical requirements for embrittlement resistance, gas tightness, and media purity – with ISO 15156 (NACE) approval for H₂ safety on request.
Manufacturing expertise and services from Interalloy
As a Swiss manufacturer, we combine engineering-driven manufacturing expertise with practical advice. Our high-pressure tubes are manufactured to the highest quality standards – from material selection and cold forming to finishing and documentation. Our aim is to provide you with not just a product, but a solution.
Precision manufacturing, autofrettage, and finishing
Our manufacturing processes are designed for precision and repeatability:
- Seamless cold forming with targeted annealing management for defined material properties
- Autofrettage on request to strengthen the inside of the tube by applying pressure
- Finishing: cone turning, thread cutting, chamfering, laser marking
Thanks to state-of-the-art CNC technology, we also manufacture complex geometries and precisely fitting connection components – all from a single source. Our service portfolio includes:
- Saw cuts from 10 mm in length
- Ready-to-install finished parts including drill holes, weld chamfers, sealing surfaces
- Assemblies with pre-mounted fittings and valves
Quality assurance in accordance with EN 10204 3.1 and traceability
All high-pressure pipes are tested and documented in accordance with EN 10204 3.1. Our quality assurance system includes:
- 100% visual inspection of each pipe
- Eddy current testing, ultrasonic testing, and hydrostatic testing
- Complete traceability via batch number and test report
In addition, our processes meet the requirements of ISO 9001 and ensure consistently high product quality across batches and series.
Accessories and compatible components
For the safe use of high-pressure pipes, you not only need the right pipe material, but also pressure-stable connecting elements that are precisely matched to the respective system. Interalloy also supports you in selecting and integrating compatible components for your piping systems.
Cone-and-thread fittings, valves, and assembly tools
In the high-pressure range from approx. 20,000 psi, cone and thread connections are the industry standard. We supply pipes with prepared ends or, on request, we can take care of the finishing for you – including:
- Cone turning and thread cutting in accordance with industry-specific standards
- Precision preparation for high-pressure screw connections
- Connection compatibility with pressure valves, check valves, and manifold blocks
In addition, we also offer recommendations on request for:
- High-pressure assembly tools
- Cutting and flaring tools for stainless steel pipes
- Adapters and reducers for system integration
This is how we ensure that your high-pressure line is not only efficient, but also safe, leak-proof, and low-maintenance in the long term.
How to choose the right high-pressure pipe
The selection of a suitable high-pressure pipe depends on several factors—in addition to the operating pressure, the medium, temperature, environmental influences, and installation conditions are also decisive. We support you in configuring the optimal product for your application—from the prototype phase to series production.
Correctly designing pressure, medium, and environment
The following criteria should be taken into account when planning your high-pressure line:
- Maximum system pressure including safety margin (according to ASME/EN/ISO)
- Medium properties: corrosive, explosive, viscous, gaseous, etc.
- Temperature range – especially for cryogenic or thermally cyclic applications
- External environment: humidity, salt water, UV, chemical exposure
- Installation situation: bending radii, vibration load, installation space
Based on this information, we will help you select the material, dimensions, machining, and accessories – technically coordinated and economically sensible.
Consulting, prototypes, and series delivery from a single source
As a solution provider, we accompany you from the initial idea to series delivery. Our services at a glance:
- Technical consulting by experienced material and application experts
- Prototype service for test facilities, special machines, and pilot projects
- Series production with reproducible quality, material certificates, and short-term availability
- Assembly and logistics service, if desired
With Interalloy, you not only get high-pressure stainless steel tubes—you also get process reliability, predictability, and a partner who thinks ahead.
