When corrosion, pressure and temperature push standard materials past their limits, nickel alloy tubing becomes the dependable choice. As a specialist nickel alloy tube manufacturer, HYG Benelux produces and supplies seamless tubes engineered for the most demanding process and instrumentation environments. Our nickel alloy seamless tubes are tested to exacting standards and supplied with full certification, giving engineers, buyers and specifiers complete confidence in every length. If you need help confirming the right grade, finish or dimension for your application, our specialists are ready to assist. Please call us on +44 (0) 730 575 2346 for expert advice.
Why Choose HYG Benelux for Nickel Alloy Tubing
Selecting a tubing partner for severe service applications is a serious decision. The wrong material or an unverified batch can shorten asset life, increase maintenance and create real safety risks. We understand these pressures, which is why our nickel alloy tubing is controlled and tested at every stage of production.
Established in 2021, HYG Benelux set out to supply premium stainless steel and nickel alloy products that set the benchmark for quality and reliability. Our advanced production facility in Ulsan is integrated with a dedicated in-house R&D centre, combining precise manufacturing with continuous testing and innovation. The result is repeatable quality across our seamless nickel alloy range, supported by genuine technical knowledge. You can read more about our vision and story to understand the standards behind every tube we produce.
Our Nickel Alloy Seamless Tube Range
We supply special alloy seamless tubes designed for corrosion resistant and high performance service. Each tube is manufactured to recognised international specifications and prepared for reliable performance in critical systems.
Our nickel alloy seamless tubes are produced in line with:
- ASTM B165 and ASTM B167
- NACE MR0175 and ISO 15156
- NACE MR0103 and ISO 17495
This NACE compliant approach makes our tubing well suited to sour service and other environments where corrosion resistance is essential. The standard finish is bright annealed (BA), with an outer diameter mechanical polish to 240 or 320 grit available for straight tubing.
Material Grades We Stock
Our typical nickel alloy materials cover a broad range of process and offshore requirements, with other materials available on request.
| Material | Common Reference | Typical Use Cases |
| N04400 | Monel 400 tube | Marine, chemical processing, corrosion resistant lines |
| N08825 | Alloy 825 tube | Oil and gas, acid handling, sour service |
| N06600 | Alloy 600 tube | High temperature and thermal applications |
| N06625 | Alloy 625 tube | Severe service, offshore and high strength systems |
| 904L | Super austenitic | Aggressive chemical and process environments |
If you require an Inconel grade, a Monel grade or a specific alloy not listed here, our team can advise on availability and suitability for your application.
Dimensions and Specifications
Our seamless nickel alloy tubes are available in straight and coiled formats to suit instrumentation, downhole and process needs.
- Straight outer diameter: 1/16 inch (1.59 mm) to 2 inch (50.80 mm)
- Coiled outer diameter: 1/16 inch (1.59 mm) to 1 inch (25.40 mm)
- Wall thickness: 0.01 inch (0.25 mm) to 0.120 inch (3.05 mm)
- Straight lengths: 10 feet (3.048 m) or 20 feet (6.096 m)
- Coiled lengths: supplied in custom lengths
Other special dimensions are available on request, so please get in touch if your project calls for a non-standard size.
Technical Requirements and Testing
Verified quality sits at the heart of everything we supply. Rather than relying on assumption, every nickel alloy seamless tube is subjected to rigorous inspection before dispatch. Our standard technical requirements include:
- 100% Positive Material Identification (PMI) tested
- 100% Eddy Current Tested in accordance with ASTM B829
- 100% Hydrotested at 1000 psi [7 MPa] for a minimum of 10 seconds
- 100% visual and surface inspected
This testing is backed by the broader capabilities of our in-house R&D centre, which carries out visual and dimensional inspection, weld decay testing, penetrant testing, destructive and mechanical testing, chemical analysis, non-destructive testing, intergranular corrosion testing, boroscope examination, ferrite content measurement and cleanliness testing. Together, these checks give you pressure tested, PMI tested tubing you can specify with confidence.
Applications and Industries We Serve
Our nickel alloy tubing supports sectors where reliability is non-negotiable. Typical applications include:
- Oil and gas instrumentation and process lines
- Downhole and offshore tubing for harsh environments
- Chemical processing and acid handling systems
- Energy and thermal applications
- Corrosion resistant instrumentation across critical process plants
Because we hold a focus on both high purity and high precision applications, we can support single critical projects and ongoing supply programmes with the same consistent quality.
Manufacturing Quality, Certification and Traceability
Our products are manufactured and supplied in accordance with internationally recognised industry norms, including ASTM, ASME, EN, DIN and JIS where applicable. Every order is supplied with material and mill certificates in accordance with EN 10204 3.1, and we maintain 100% traceability on all manufactured goods, so you always know exactly what you have received.
Our wider credentials reflect a sustained commitment to quality and compliance, including ISO 9001 and ISO 14001 management systems, the PED Directive, AD2000-Merkblatt W0 and W2, PER 2016 (UKCA) and IATF 16949. Further accreditations, patents and approvals are detailed on our quality and certifications page, giving you a transparent view of the standards behind every tube.
Packaging and Protection
Careful packaging protects tube integrity from our facility to your site. Straight tubing is individually PE end-capped, bundle sleeved and supplied in wooden box packaging. Coiled tubing is supplied in loose coils or on a wooden reel, then stacked in wooden pallets or a wooden box. This attention to detail helps your tubing arrive clean, undamaged and ready for installation.
Why Buyers Choose HYG Benelux
Procurement and engineering teams partner with us because we combine global manufacturing strength with responsive, knowledgeable support. As both a manufacturer and distributor of stainless steel and nickel alloy tubing, we offer certified, traceable and fully tested products, alongside people who understand the technical detail and the realities of demanding service conditions.
In short, you gain dependable materials, verified performance and a supplier focused on long-term partnerships rather than one-off transactions.
Discuss Your Nickel Alloy Tubing Requirements
Whether you are specifying alloy 625 tube for an offshore project, sourcing alloy 825 for sour service, or comparing straight and coiled options for instrumentation, our team can guide you to the right solution. We will help you confirm material grade, finish, wall thickness, dimensions and certification, then advise on availability.
Please call us on +44 (0) 730 575 2346 for expert advice.
Frequently Asked Questions
Our typical materials include N04400 (Monel 400), N08825 (Alloy 825), N06600 (Alloy 600), N06625 (Alloy 625) and 904L. Other nickel alloy materials are available on request, and we are happy to advise on the most suitable grade for your application.
Yes. Our seamless nickel alloy tubes are produced in line with NACE MR0175 and ISO 15156, as well as NACE MR0103 and ISO 17495, alongside ASTM B165 and ASTM B167. This makes them well suited to sour service and other corrosion resistant applications.
We offer straight tubing with an outer diameter from 1/16 inch (1.59 mm) to 2 inch (50.80 mm), and coiled tubing from 1/16 inch (1.59 mm) to 1 inch (25.40 mm). Wall thickness ranges from 0.01 inch (0.25 mm) to 0.120 inch (3.05 mm), with straight lengths of 10 feet (3.048 m) or 20 feet (6.096 m) and coiled tubing in custom lengths. Special dimensions are available on request.
Every tube is 100% PMI tested, 100% Eddy Current Tested to ASTM B829, 100% Hydrotested at 1000 psi [7 MPa] for a minimum of 10 seconds, and 100% visual and surface inspected. These checks are supported by the wider testing capabilities of our in-house R&D centre.
Yes. All products are supplied with EN 10204 3.1 material or mill certificates, and we maintain 100% traceability on every manufactured item, giving you full assurance of what has been delivered.
Straight tubing is individually PE end-capped, bundle sleeved and packed in wooden boxes. Coiled tubing is supplied in loose coils or on a wooden reel, then stacked in wooden pallets or a wooden box to protect it in transit.