TIG
For stainless steel and Hastelloy, for root passes and thin-walled pipes. With root shielding, so that the inside stays smooth and free of oxide.
Quality and welding technology: how we weld, test and document.
Which process for which material, which tests, which documents: this page states what we actually do. You define the scope of documentation when you place the order.
Welding technology
Five welding processes
The process is chosen according to the material, the wall thickness and the position of the weld.
Orbital welding
For series of pipe-to-pipe joints, with reproducible weld quality.
MAG
For fill and cap passes in carbon steel, economical in prefabrication.
MIG
For aluminium and for metalwork.
Stick (MMA)
For fill and cap passes and for hard-to-reach locations on site.
Material
Materials
We most often work with stainless steel 1.4301 (304) and 1.4404 (316L), carbon steel, Hastelloy alloys and PTFE-lined steel pipes. We also work with aluminium, copper and other alloys: almost all metals.
The choice of material depends on the medium, pressure, temperature and hygiene requirements. We agree it with your materials engineering department.
The workshop has two tube bending machines for DN 10 to DN 50. Bent pipes replace welded elbows and save welds.
Inspection
Testing
Every line is tested before handover. We agree the type and scope of testing with you before work begins.
- Visual inspection — of every weld.
- Pressure test or leak test — with water or air, as agreed, with a test report.
- Dye penetrant testing (PT) — if you order it.
- Borescope inspection of the root — where required, with photographic documentation.
- Pickling and passivation — for stainless steel on request, with a record.
Step by step
From order to documentation
- Step 01
Order with form
With the order you complete a form on which you tick the documentation you require in line with your internal specifications.
- Step 02
Procurement with certificate
Pipes, fittings and filler metals are procured with a material certificate.
- Step 03
Prefabrication with spool number
Every spool is given a number in the workshop in Pratteln. Through it, the material certificate, welder, weld log and test result can be traced.
- Step 04
Testing
Visual inspection, pressure test or leak test and the other tests ordered.
- Step 05
Handover
You receive the documentation package in the scope you ordered.
Traceability
Documentation according to your form
You define at the time of ordering which documents you receive at the end. The options are:
- Material certificates to EN 10204 (3.1 / 3.2)
- Weld logs with welder assignment
- Spool numbers for complete traceability
- Isometrics and as-built drawings
- Photographic documentation
- Results of dye penetrant testing (PT)
- Borescope inspection of the root
- Pressure test and leak test reports
- Record of pickling and passivation
Contact
Let's talk about your project.
Hohenrainstrasse 10b, 4133 Pratteln · Mon–Fri 07:00–12:00 and 13:00–16:00