This is not a routine administrative update. It is a substantive expansion of our certified quality management system, one that reflects years of investment in production capability and signals a clear commitment to our clients: the same rigorous quality standards that have governed our engineering and spare parts activities now apply, with full third-party verification, to every copper winding we manufacture.

What has changed and why it matters

CEM Engineering has been ISO 9001 certified for its core engineering activity, the development of transformers and the marketing of transformer spare parts, since the first issue of this certificate in November 2024. That certification covered our engineering processes, project management, procurement quality, and technical documentation.

The expanded certification now covers a second operational unit: our manufacturing site at Via dell’Artigianato 78, 24055 Cologno al Serio (BG), where our in-house winding shop operates. This site is certified specifically for the Construction of Windings for Transformers, bringing our production activity under the same ISO 9001:2015 framework as our engineering activity.

For our clients, this means that the complete chain, from transformer engineering specification through physical winding production, is now managed under a single, RINA-verified quality system. There is no quality gap between what we design and what we build.

What the certification covers

Under certificate 45715/24/S, the ISO 9001:2015 quality management system of C.E.M. Industrial Transformers S.r.l. now formally covers three operational scopes across two Cologno al Serio sites:

• Engineering for the development of transformers (Via Crema 7/A)
• Marketing of transformer spare parts (Via Crema 7/A)
• Construction of windings for transformers (Via dell’Artigianato 78 – production facility)

The certificate was issued by RINA Services S.p.A., one of Italy’s most respected independent certification bodies,and carries the IAF:34, IAF:19, and IAF:29 accreditation codes, covering electrical and mechanical engineering manufacturing sectors. The current revision is dated 13 March 2026, with validity through 25 November 2027.

Engineering expertise and production quality: now certified together

CEM Engineering has been building its in-house winding production capability over several years. Our winding shop produces custom copper windings, disc windings, helical windings, and Continuously Transposed Conductor (CTC) assemblies, for EAF transformers, ladle furnace transformers, rectifier transformers, and other industrial units requiring high-precision, high-reliability copper windings for new build and refurbishment programmes.

Until now, this production activity operated under our internal quality procedures. The formal extension of ISO 9001:2015 certification to the production facility takes a significant further step: it subjects our manufacturing processes, conductor material traceability, dimensional inspection, insulation application, winding geometry verification, and final quality checks, to external third-party audit by RINA.

This matters for our clients because it closes a gap that exists at many transformer service organisations: the separation between the engineering team that specifies a winding refurbishment and the production entity that manufactures the replacement winding. At CEM Engineering, both activities are now certified under the same quality management system, with the same documented processes, the same traceability requirements, and the same external audit oversight.

Why this distinguishes CEM engineering in the market

We believe, and the feedback we receive from our clients in the global steelmaking, metallurgical, and industrial processing sectors confirms, that the combination of deep engineering expertise and certified in-house manufacturing capability is rare among independent transformer engineering companies of our size.

Large transformer manufacturers have production facilities, but their engineering focus is on new build, not on the refurbishment and specialist engineering support that industrial clients need for existing assets. Independent service organisations typically have engineering expertise but outsource all manufacturing, introducing the quality and lead time risks that in-house capability eliminates.

The extended ISO 9001:2015 certification formalises what we have been building operationally: a vertically integrated capability, engineering, production, and service, governed by a single quality management system and independently verified. For a client placing a critical winding refurbishment order for an EAF transformer with a two-week production window, this is not a marketing claim. It is a documented, audited commitment.

What this means for your next project

Whether you are planning a transformer refurbishment, sourcing replacement windings for an emergency repair, or specifying a new transformer procurement, the expanded certification provides additional assurance that CEM Engineering’s production quality meets internationally recognised standards.