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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryIndustryMetal IndustryWalenstadtKelag Systems AG
Kelag Systems AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

The core activity of Kelag Systems AG encompasses the planning, manufacturing, assembly and maintenance of complex plants and systems, particularly in the fields of pipeline construction, steel hydraulic engineering, pressure pipelines, armor plating, plant and apparatus construction. This includes, among other things, the production of pipelines, pressure vessels, reactors, tanks, heat exchangers and other specialized plants for industry and infrastructure. The company also offers services such as engineering, personnel leasing, contract welding, welding repairs and retrofitting of existing plants.

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Products & services

Industry:Metal Industry
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4.2/5

Kelag Systems AG

✓ Offered9
Pipework construction
Complete pipework systems in C steel and CrNi steel for industry and infrastructure, including prefabrication, welding and delivery ready for assembly for power plants, plants and pipelines.
Pressure pipeline construction
Pressure pipelines and associated components such as pipe bends, flexible hoses, expansion joints, man access openings, pipe supports and turbine connection lines, including workshop fabrication and on-site assembly.
Plant, special plant and packaged unit construction
Customer-specific industrial plants and packaged units, skids and auxiliary systems for gas and steam turbines, high-pressure compressors and fuel, lubricating oil and gas shut-off systems.
Engineering
Concept design, permit design, execution planning, sizing, detailed engineering as well as FE calculations and modelling for piping, plant and special plant projects.
Workshop fabrication
Cutting to size and preparation of weld edges, tack and welding work, CNC pipe bending, surface treatments and mechanical machining in our own workshop halls.
On-site assembly
On-site assembly work, quality assurance, commissioning, installation documentation and provision of a supervisor for industrial, infrastructure and plant projects.
Hydraulic engineering and armouring
Gates, fish passes, dam-balk systems, impounding and weir structures, sluice gates, trash rack systems as well as sand and gravel intercepting systems for hydraulic engineering installations.
Vessel and equipment construction
Reactors, tanks, pressure vessels, columns, heat exchangers and other equipment for industrial applications and process plants.
Services and support
Temporary staffing, contract welding, welding repairs, retrofit of existing plants and full-scope services for projects.
Trust & reputation

ranQ Trust Score of Kelag Systems AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 100% · As of October 2026

Kelag Systems AG scores 72.7 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.80.624%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.55.910%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.70.08%
Kelag Systems AG scores 87.8 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.89.612%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.82.07%
Kelag Systems AG scores 86.7 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).86.722%
Kelag Systems AG scores 17.7 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.12.04%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.23.34%
Qualifications+0.00

Kelag Systems AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 8 customer reviews. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 8 reviews across all connected sources

Sources
GGoogle58
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

Press

Media

January 7, 2015Media
Der bessere von zwei Auswegen
tagblatt.ch
January 6, 2015Media
Ostschweiz - Kelag-Gruppe: Unternehmen gerettet, trotzdem gibt es Entlassungen
srf.ch

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Location

Walenseestrasse 34
8880 Walenstadt
Opening hours
Mon
07:00 - 11:45, 13:15 - 16:30
Tue
07:00 - 11:45, 13:15 - 16:30
Wed
07:00 - 11:45, 13:15 - 16:30
Thu
07:00 - 11:45, 13:15 - 16:30
Fri
07:00 - 11:45, 13:15 - 15:45
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-466.244.463
Founded
2015 · 11 years
Last commercial register change
September 8, 2025
Employees
21 to 50
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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