A mastery in welding with fine thickness is essential in the domain of expansion bellows. We use the TIG (Tungsten Inert Gas) process for welds from 0.3 mm in the thickness using butt welding or lap welding .
Other processes can be applied for welding the connections (welding ends, flanges, etc.) or accessories of the expansion joints (gussets, hinges, etc.) depending on the type and thickness :
MIG (Metal Inert Gas)
MAG (Metal Active Gas)
Arc (Coated eclectrode)
TYPES OF WELDING
A Welding Procedure Specification (WPS) is drawn up for each type of welding, per order and per drawing, and is integrated with the corresponding Procedure Qualification Record (PQR) in a welding log specific to each production .
We have a panel of 750 PQRs.
PRODUCTION SURFACE AREA
One 50T press
Two 200T presses
One 500T press
(for forming up to ND 2300)
(for special forming beyond ND 2300)
3 semi-automatic TIG stations
1 MIG CMT station
1 CNC shearing machine for thin parts,
between 0,3 mm and 4 mm
2 overhead cranes of 10T
2 overhead cranes of 6T
2 overhead cranes of 5T
19 overhead cranes between 1 and 3T
6 rolling devices for thin parts,
between 0,3mm and 3mm
2 rolling devices for thick parts:
1 with max. width of 2000 mm/max. thickness of 37 mm
1 with max. width 3000 mm/max. thickness of 20 mm
LONGITUDINAL SEAM WELDING
4 automatic TIG benches
Glass bead peening cabin
length = 6000 mm
width = 4000 mm
height = 4000 mm
SFZ offers you a wide range of materials for your expansion joints, from the most common to the most exotic:
Austenitic stainless steel : 304L, 316L, 316 Ti, 321, UB6, etc.
Austenitic heat-resistant steels: 304H, 321H, 310S, Incoloy 800H, Incoloy 800HT, 1.4910, etc.
Nickel alloys : Monel 400, Incoloy 825, Inconel 600, 625, Hastelloy C276, etc.
Carbon steels (for accessories and connections): P265GH, 13CrMo4-5, etc.
Cr-Mo Alloy steel (for studs, cleats, etc.): 13CrMo4-5, 10CrMo9-10, etc.
Aluminium, and so on.
We supply the following with the material used :
material certificates 3.1 and 3.2 (EN 10204)
filler metal certificates.