QUALIFIED WELDERS AND WELDING PROCEDURES
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.
A WIDE RANGE OF PRODUCT
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.