It ensures no internal crevices, corrosion resistance and longer service life with aggressive fluids.
Certified Stainless Steel Fabrication and Processing for Water Purification and Treatment
Full-penetration welded piping, custom stainless steel filters and support skids for industrial water treatment plants. Crainox works alongside skid builders and plant operators, providing reliable, traceable stainless steel solutions ready for installation.
Why choose Crainox
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01
Single-source supplier of stainless steel solutions
A single partner, from raw material to final testing, reduces interfaces and project lead times.
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Integrated supply chain
All key stainless steel processes are managed in-house within a controlled workflow that ensures consistent quality and reliable lead times.
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Certified quality
ISO 9001, UNI EN ISO 3834-2; Welding Book, 3.1/3.2 certificates and NDT reports (RX · PMI · UT · VT · PT) on stainless steel piping and filters.
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Technical office & 3D metrology rooms
Dedicated engineers and metrology labs for high-precision design and dimensional verification.
Solutions and products for the sector Water Purification and Treatment
Guaranteed stainless steel solutions: from piping to final testing
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Full-penetration stainless steel piping
DN 25–300 lines in AISI 304 L/316 L/duplex with full-penetration TIG-welded pipes.
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Stainless steel filter vessels
Pressure filters for sand, carbon or resins, optionally PED- or ASME-certified.
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Water pre-treatment skids
Skid assembly with piping, pumps, valves, instrumentation and electrical control; in-house functional FAT reduces on-site start-up.
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Hydraulic Test with leak-tightness certificate
Test bench, recorded pressure-time curve and PED or ASME leak-tightness certificate. Photos and videos provided for the client’s technical archive.
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Comprehensive NDT inspections
RX, PMI, LP and VT... through an ISO 17025 laboratory. Digital reports with radiographic images ensure metallurgical quality and minimise the risk of failure.
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Metrology room
3D measuring machine for verifying compliance with design tolerances and for general dimensional checks.
Can’t find the solution you need? Every plant is different: talk to our engineers to develop the ideal configuration.
Find out more
In-house processes and technologies
With a state-of-the-art machine fleet and specialised personnel, Crainox manages all stages of stainless steel processing for the Water Purification and Treatment sector, ensuring maximum precision, reliable lead times and end-to-end quality control.
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01
Stainless steel laser cutting
Clean, repeatable cuts on sheet and tube, with edges ready for bending and welding. Optimisation of nesting layouts to reduce waste and time, batch traceability and consistent quality even on complex series.
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CNC bending of stainless steel sheet
Precise angle control and consistency between prototypes and production runs, with design of radii and fixturing for perfect fits. Technical tolerance management to ensure fast, reliable assembly in plants and machinery.
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Rolling of stainless steel plate
Forming of cylinders and cones with geometric continuity and weld-ready edges. Guaranteed coaxiality and straightness for tanks, piping, filters and fabrications intended for regulated or corrosive environments.
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CNC drilling and milling of stainless steel
High-precision machining of plates, flanges and frames, with controlled surface finishes. Creation of seats, slots and threads with metrological documentation on request for maximum reliability on the line.
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Grinding and deburring of stainless steel sheet
Burr removal and edge finishing to improve safety, weldability and hygiene. Uniform satin finishes and surfaces ready for subsequent treatments, with consistent quality standards even at high volumes.
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Certified stainless steel welding
Qualified processes and certified operators, with documented procedures and controls. Leak-tight joints and hygienic surfaces for process lines, with optional non-destructive testing and functional acceptance when required.
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Finishes and surface treatments for stainless steel
Satin finishing, polishing and vibratory finishing for aesthetic and hygienic performance; pickling and passivation for corrosion resistance. Controlled roughness and appearance, protective packaging and management of critical surfaces for sensitive environments.
Projects for the sector Water Purification and Treatment
Realise your projects, find the answers to your questions
A single partner for bespoke stainless steel solutions
Do you have a water treatment project? Send your specifications: our experts will recommend the most suitable solution with confirmed lead times.
Realise your project with usYes, on request we include WPS, WPQR, welding logs and welder qualifications.
RX, PMI, UT through an accredited laboratory; VT and PT in-house with photographic reports.
Yes, we test skids and vessels, verifying flow rates and leak-tightness.
According to customer specifications, stainless steel AISI 304L/316L/duplex.
Your reliable partner for stainless steel fabrication