Services
Sonntag combines a wide manufacturing program with modern production technology. From individual pipe fittings and vessel components to precise mechanical machining, we offer solutions from a single source. Our services are divided into two areas: the manufacturing program with our products as well as production and machining with the associated manufacturing processes.
Manufacturing program
Our manufacturing program includes a wide range of high-quality pipe components and structural parts – individual fittings, assemblies and special constructions are produced according to drawings or customer-specific specifications.
Power plant components
Special T-pieces
Cones 50 mm
T-pieces OPAL PN 105
Products
Oil and gas industry up to 300 bar
– Pipeline systems
– Gas storage systems
– Compressor stations
Chemical industry
Refinery plants
Conventional power plants / nuclear power plants
Valves / pump housings
General plant engineering
Pressure vessel construction
Offshore structures
Mechanical engineering constructions
Pipe fittings
Welded T-pieces 90° – 45°
Concentric/eccentric reducers
Pants pipes
Saddle nozzles
Segment pipe bends
Headers, pig launchers
Branch pipes with connection contour
Protective screens of all kinds
Cladded flanges
Oval pipes
Housing parts cylindrical and conical
– welded and flanged
– with mechanical finishing
Pre-components cylindrical/conical
– welded and flanged
– with mechanical finishing
Pre-components cylindrical/conical
– welded and flanged
– with mechanical machining
Shell sections cylindrical/conical
– with assembly
– nozzle production
– manholes
Diameter DN 100 – 3200
Wall thickness 3 – 60 mm
Length 2,000 mm, with circumferential welds up to 18
Conical pipes diameter DN 100 – 3200
Wall thickness 3 – 60 mm
Length 2,000 mm, with circumferential welds up to 18 m
Production & Processing
Modern production facilities and qualified specialists enable the precise implementation of demanding components. From cutting to forming and welding work through to mechanical finishing, we cover all production steps within our manufacturing process.
Shape cutting
Screw conveyor
Häusler plate bending machine
Stölting plate bending machine
Stabbing guides
Cutting sheets and pipes
CNC controlled
Oxy-fuel / plasma cutting
Cutting options for virtually any geometry for pipe diameters from DN 100 to DN 2000 x 13 m
Wall thicknesss up to 60 mm
e.g. T-piece contours
– branch pipe connections
– branch penetrations
– segment cuts
– end machining, etc.
All cuts with direct preparation of optimal welding bevels with consistent opening angle
Bending operations
1 Häusler plate bending machine – 2.0 m rolling length
– cylindrical pipe sections internal diameter 580 – 3,000 mm
– wall thickness cold up to 60 mm
– conical pipe sections internal diameter 350 – 3,000 mm
– wall thickness cold up to 60 mm
1 Stölting plate bending machine – 1.6 m rolling length
– specially designed for conical bending with gas-nitrided upper and lower rollers
– cones internal diameter 210 x 20 mm
– cylindrical pipe sections internal diameter 210 – 3,000 mm
– wall thickness cold up to 20 mm + hot up to 35 mm
1 Schäfer plate bending machine – 2.50 m rolling length
– cylindrical and conical up to 25 mm
2 various plate bending machines
– cylindrical and conical
– diameter 100 – 500 mm
– wall thickness 2 – 5 mm
End finishing
Conical centrifuge
Annealing furnace – gas
Transport Collector Alloy 800 H
Distributor for centrifuge
Welding work
4 submerged arc welding machines – working length 4 m
for internal and external welding
as well as circumferential seam welding up to diameter 3000
with video monitoring
MAG (shielding gas) welding machines
TIG (inert gas) welding machines
Manual electric welding machines
End finishing
1 oxy-fuel / plasma cutting system
mechanical machining on lathe
and vertical turning machines
Heat treatment facility
1 annealing furnace
internal dimensions 1600 x 1600 x 5000 mm
Testing
Non-destructive testing
PT (dye penetrant testing)
MT (magnetic particle testing)
X-ray testing
UT surface and weld testing
external / internal by Ferrotec Kreuztal
Destructive testing
external at Zentrallabor Siegerland
Planning / Design
CAD drawing creation
design solutions
Component calculations according to AD regulations
and ANSI using original TÜV software
Certified quality – certificates & approvals
For production in areas subject to mandatory monitoring, we meet all relevant legal and normative requirements. Our certificates document tested processes, qualified personnel and the highest quality standards. Further documents and evidence are available upon request.