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 |
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| 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.:
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As Welded
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Stress Relieved
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Normalized
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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
