Welded Tubes & Cone Shaped Reducers

Cold Rolled Steel Plates

Rolled plates are welded according to the most important international standards in any Steel grade to suit all requirements for the manufacturing of Transition Pup Pieces or pipes, Tubes and Cones for Pressure Vessels bodies such as Pig Launcher & Receivers, Heat Exchangers, Power Plants and tubes to be assembled to obtain Lateral Tees, Flow Straighteners, Repair sleeves etc., or hot-forged Fittings. Specific procedures are held to provide also low diameter's tolerance:

i.e. ASTM A671 - Diameter tolerance ±0,5% - out of roundness 1%

Check out our welding dept. for a complete overview concerning our Welding Procedure Specifications and relevant Procedure Qualification Records, where You'll find also information about our standard Non Destructive Examination (NDE) system.

Longitudinal Welded Tube's medium tolerances

inside Ø Thickness Length Ø tol.
200 mm. 15 mm. 1000 mm. +2 -0 mm.
410 mm. 25 mm. 2500 mm. +2 -0 mm.
680 mm. 50 mm. 3000 mm. +2 -0 mm.
1100 mm. 70 mm. 3000 mm. ±0,5%
1400 mm. 80 mm. 3000 mm. ±1%
>1400 mm. 90 mm. 3000 mm. ±1%

Rolled Plates specifically dimensioned according to the required tubes to be re-worked in order to obtain Tees, Elbows, Reducers etc. so, based on the product's final purpose, the relevant manufacturing system is setup so that to assure the conformity of all parameters for the product itself such as special Customer's requirements for minimum operating temperature and so on. Thanks to a special quality system, each production's process is considered as the last phase before the delivery so that, on Customer's request, tubes only tack-welded, preliminary welded or simply rolled plates can be supplied, as well as the edges can be required as Plain Ends, Bevelled by Oxicutting or machined to ASME B16.25. The Delivery Status of the products is conform to the relevant governing code therefore it can be subject to Hydraulic Test and Heat Treatment so as the certification will be as per raw material's type and Customer's requirements, i.e.:

  • As Welded
  • Stress Relieved
  • Normalized
  • Quenched & Tempered

Rolled and welded tubes EN 10204:2004 3.1 / 3.2

 ASTM A671 gr.CC60 / 70 all classes

 ASTM A672 gr.B60 / C60 all classes

 MSS SP 75 Wphy52 / Wphy60 / Wphy65 / Wphy70

 equiv. to API-5L gr.X52 / X60 / X65 / X70

 other on request

Some carbon steel base materials

 ASTM A516 gr.60 - ASTM A234 WPB - EN 10025 S355J2+N

 ASTM A516 gr.70 - EN 10028-3 P355NL1 - EN 10208-2 L360MB

 EN 10225 S420QL - ASTM A860 WPHY60 - EN 10208-2 L415MB

 EN 10028-3 P460NL1 - ASTM A860 WPHY65 / 70 - EN 10208-2 L450MB

 ASTM A387gr.11 / 22 / 5 

Some stainless steel base materials

304-L-H X5CrNi1810 1.4301 Z7CN18-09

 321-H X6CrNiTi1811 1.4541 Z6CNT18-10

 316-L-H-T X5CrNiMo1712 1.4401 Z7CND17-11-02

 S30815 X6CrTi12 1.4693

 S31803 X8Cr17 1.4462

 309-310S X6CrNi2520 1.4833