
Specialized Manufacturer of Welded Tubes
in Stainless Steel, Duplex, Nickel Alloys and Titanium - Como, Italy
Founded in 1997 in Casnate con Bernate (Como), A.D. Tubi Inossidabili is a leading Italian manufacturer of welded tubes in stainless steel, duplex, nickel alloys and titanium. With more than 25 years of consolidated expertise, the company has become a benchmark in the production of high-performance heat exchanger tubes.
Our History and Corporate Growth
Since 1997, A.D. Tubi Inossidabili has built an international reputation based on three pillars: Quality, Expertise and Flexibility. Today we are part of Cardinali Holding Group, strengthening our leadership position in the European welded tube market.
Brand Pillars
Quality
With “quality,” we express the excellence that distinguishes not only our product but the entire production process, from order placement to processing and through to delivery. This unwavering commitment to quality has solidified A.D. Tubi Inossidabili as a reliable entity over the years.
Expertise
Expertise is what sets us apart, signifying both the extensive experience and in-depth know-how that each one of us brings to our clients and collaborators.
It also represents the high level of technological expertise we offer through state-of-the-art laboratories and facilities.

Flexibility
Flexibility is an attitude to meet the specific needs of our clients by crafting tailor-made solutions in the requested timeframes and manner, with the care we are capable of providing. Our flexibility is well represented by our ability to tackle market challenges through constant investments in research and development.
Specializations and Advanced Materials
Complete Range of Special Metal Alloys
Our welded tube production covers a wide variety of materials:
Stainless Steels
- Austenitic stainless steel – for standard and demanding applications
- Superaustenitic stainless steel – maximum corrosion resistance
- Duplex and superduplex stainless steel – high mechanical and chemical resistance
- Ferritic and superferritic stainless steel – optimized for high temperatures
Special Alloys and High-Performance Materials
- Nickel alloys – for extreme corrosive environments
- Titanium tubes – lightweight and superior strength
- Certified materials for critical sectors
Application Sectors and Served Markets
High-Tech Industries for Specialized Tubes
Our welded tubes meet the needs of demanding industrial markets:
Energy Sector
- Nuclear power plants – certified components for safety
- Solar thermal plants – optimized energy efficiency
- Geothermal plants – resistance to high temperatures
- Renewable energy production – environmental sustainability
Oil & Gas and Petrochemical
- Oil refineries – tubes for critical processes
- Petrochemical plants – superior chemical resistance
- Oil & gas extraction – certified offshore components
- Hydrocarbon transport – safety and reliability
Chemical Industry and Water Treatment
- Desalination plants – resistance to saline corrosion
- Industrial chemical processes – certified inert materials
- Wastewater treatment – durable components
Fire Protection
- Sprinkler fire protection systems – pressure and corrosion resistance
International Certifications and Technical Qualifications
A.D. Tubi Inossidabili holds the most important international certifications:
System Certifications
- ISO 9001:2015 – Quality Management System
- ISO 14001:2015 – Environmental Management System
- ISO 45001:2018 – Occupational Health & Safety Management System
Product Certifications
- PED 2014/68/EU – Pressure Equipment Directive
- AD2000 W0 – German standards for pressure vessels
- NORSOK M-650 – Norwegian standards for oil & gas
Recognized Certification Bodies
- DNV GL – Det Norske Veritas
- Lloyd’s Register – UK Marine Classification Society
- RINA – Registro Italiano Navale
- KR – Korean Register
In-House Laboratories and Quality Control
Our two state-of-the-art in-house laboratories ensure:
- Complete range of destructive and non-destructive testing
- Skilled and certified personnel
- Real-time quality control during production
- Product certification for international markets


PED 2014/68/EU Annex I, Section 4.3 AD2000 W0 and EN764-5, Para. 4.2
Manufacturer approved by RINA, Lloyd’s Register, KR Register, DNV, Norsok M-650. Product compliance to EU Commission Regulation no. 2023/2006 on good manufacturing practices for materials and articles intended to come into contact with food (GMP).

ISO 9001
ISO 14001 / ISO 45001