SPECIFIC MEANS

QUALIFIED WELDERS AND WELDING PROCEDURES

Invar gas dome with circular weld

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)

     

QUALIFICATIONS

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.

OUR PRODUCTION METHODS

PRODUCTION SURFACE AREA

5 500m²

HYDROFORMAGE

One 50T press

Two 200T presses

One 500T press

(for forming up to ND 2300)

Hydraulic press

(for special forming beyond ND 2300)

CIRCULAR WELDING

     3 semi-automatic TIG stations

1 MIG CMT station

CUTTING

1 CNC shearing machine for thin parts,

between 0,3 mm and 4 mm

HANDLING

2 overhead cranes of 10T

2 overhead cranes of 6T

2 overhead cranes of  5T

19 overhead cranes between 1 and 3T

ROLL BENDING

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

FINISHING

Glass bead peening cabin

length = 6000 mm

width = 4000 mm 

height = 4000 mm

Production surface area
Shears
Roll bending
500T press
Longitudinal seam welding bench
200T press
Longitudinal seam welding
Circular welding
Circular welding
Lifting devices
Glass Bead Peening Cabin
Glass Bead Peening

A WIDE RANGE OF PRODUCT

MATERIALS

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.

MATERIAL CERTIFICATES

We supply the following with the material used :

  • material certificates 3.1 and 3.2 (EN 10204)

  • filler metal certificates.