We believe that having third party approvals is simply the start of a process that is required to supply the market place with services at the forefront of materials testing technology.


S. T. W. (Non-Destructive) Ltd

Trent Street
S9 3XU
United Kingdom


A UKAS accredited testing laboratory No.9163

Accredited in accordance with ISO/IEC 17025:2005

Please see our current schedule of accreditation for full details of our accredited services

Download accreditation certificate PDF

Download schedule of accreditation PDF




Group Quality Approval

BS EN ISO 9001:2015
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Group Environmental Approval


BS EN ISO 14001:2015 
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Group Quality Policy

SSG Group Quality Policy Feb19:Rev 7

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Group Environment Policy

SSG Group Environmental Policy Feb18:Rev 2

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Group Health & Safety Policy

SSG Group Health & Safety Policy Feb18:Rev 1

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