AD TUBI INOSSIDABILI

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Lean Production Process for High-Quality Welded Tubes

A.D. Tubi Inossidabili adopts an advanced Lean production process that ensures the efficient execution of all manufacturing operations. By minimizing manual handling during production, we achieve welded tubes with consistent quality while optimizing production times and quality control.

Cutting-Edge
Welding Technologies

Our welded tube production relies on two industry-leading technologies:

TIG Welding (GTAW) – Proven Technology

  • Tungsten Inert Gas welding for excellent metallurgical quality
  • Precise control of the welding process
  • High repeatability and consistent quality
  • Suitable for special materials and critical applications


Laser Welding – Advanced Technology

  • Precision laser welding with short thermal cycles
  • Reduced heat-affected zone for optimal properties
  • Superior millimetric accuracy for certain special materials
  • Ideal for thin-walled tubes and tight tolerances

Bright Annealing

All our welding lines are equipped with bright annealing furnaces, ensuring:

  • Shiny surface finish with no oxidation
  • Optimal mechanical properties of the material
  • Maximized corrosion resistance
  • Compliance with the strictest international standards

Technological Investments
and Continuous Training

We continuously invest in:

  • Cutting-edge production technologies
  • Automated quality control systems
  • Certified specialist training for employees
  • Research and development for ongoing innovation


These investments have driven the company’s remarkable growth and confirm the strong commitment to excellence in processes and products.

Product Range

Dimensions and Geometric Characteristics

Available Size Range:

  • Diameter: from ø7 mm to ø76.2 mm – .281’’ to 3’’
  • Wall thickness: from 0.4 mm to 4 mm – .016’’ to .154’’
  • Fixed lengths: up to 30 meters – 100’
  • Special shapes: round, oval, elliptical, rectangular, and custom shapes upon request


Special Configurations:

  • Straight tubes for standard applications
  • U-bent tubes for heat exchangers
  • Finned tubes for optimized heat transfer
  • Customized forms according to customer specifications

Materials

AUSTENITIC STEEL
ENUNSTP
1.4301S30400TP304
1.4306TP304L
1.4307S30403TP304L
1.4311S30453TP304LN
1.4404S31600TP316
1.4404S31603TP316L
1.4406S31653TP316LN
1.4432TP316L
1.4435TP316L
1.4436TP316
1.4438S31703TP317L
1.4439S31726TP317LNM
S31700TP317
1.4449TP317
1.4550S34700TP347
1.4541S32100TP321
1.4571S31653TP316Ti
1.4828TP309
1.4833S30908TP309S
1.4845S31008TP310S
1.4878S32109TP321H
1.4948S30409TP304H
1.4835S30815253MA®
S33400Alloy 840
STANDARD
EN 10217/7 TC1 & TC2
EN 10296-2
EN10357
DIN 11850
AD 2000 W2 - W4- W10
ASTM/ASME A/SA249
ASTM A269
ASTM A270
ASTM A554
ASTM A632
ASTM A778
ASTM/ASME B/SB674
ASTM/ASME A/SA312
ASTM/ASME A/SA688
ASTM/ASME B/SB676
SUPERAUSTENITIC STEEL
ENUNSGRADE
1.4529N089261925HMo®
N08367TP304L
1.4562N08031Alloy 31
1.4539N08904904L
1.4547S31254254SMo®
STANDARD
EN 10217/7 TC1 & TC2
EN 10296-2
ASTM/ASME A/SA249
ASTM A269
ASTM A270
ASTM/ASME A/SA312
ASTM/ASME B/SB676
AD 2000 W2
ASTM A632
ASTM/ASME B/SB674
ASTM/ASME A/SA688
ASTM/ASME B/SB674
ASTM/ASME A/SA468
DUPLEX STEEL
ENUNSGRADE
1.4362S32304DSS 2304
1.4162S32101DSS 2101
S32003DSS 2003
1.4410S32750DSS 2507
1.4501S32760SDX 100®
S82031FDX 27®
1.4462S31803DSS 2205
1.4462S32205DSS 2205
STANDARD
EN 10217/7 TC1 & TC2
ASTM/ASME A/SA789
EN10357
AD 2000 W2
EN 10296-2
ASTM A554
ASTM/ASME A/SA790
FERRITIC STEEL
ENUNSTP
1.4016S43000TP430
1.4509TP441
1.4512TP409
1.4521TP444
S43932TP439M
1.4510TP439M
1.4520TP430Ti
S43035TP439
S41008TP410S
STANDARD
ASTM /ASME A/SA268
ASTM/ASME A/SA249
EN10357
ASTM A/SA803
EN 10296-2
ASTM A554
NICKEL ALLOYS
ENUNSGRADE
2.4602N06022Alloy 22
2.4605N06059Alloy 59
2.4660N08020Alloy 20
2.4633N06025Alloy 25
1.4563N08028Alloy 28
1.4876N08800Alloy 800
2.4858N08825Alloy 825
2.4360N04400Alloy 400
2.4816N06600Alloy 600
2.4851N06601Alloy 601
2.4700N06601Alloy 2120
2.4675N06200Alloy C2000
2.4068N02201Alloy 201
2.4733N06230Alloy 230
2.4819N10276C-276
2.4856N06625Alloy 625
STANDARD
ASTM/ASME B/SB515
ASTM/ASME B/SB516
ASTM/ASME B/SB626
ASTM/ASME B/SB704
ASTM B/SB751
ASTM/ASME B/SB730
ASTM/ASME B/SB468
AD 2000 W2
EN 10217/7 TC1 & TC2
TITANIUM
GRADE
1-2-2H-7-7H-12-16-16H
STANDARD
ASTM/ASME B/SB338
ISO18762
Certificazione TUV SUD

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).

Certificazione TUV NORD ISO

ISO 9001
ISO 14001 / ISO 45001