TWI's experts involved with some the most commonly applied international standards. From the left: Isabel Hadley (Fitness-for-Service), Marcello Consonni (Welding qualifications, ASME IX, ISO), Capucine Carpentier (Nuclear, NDT), Geoff Melton (Welding Fumes, Arc Welding), Philippa Moore (Fracture toughness testing).
TWI actively participates in the development of technical and safety-related standards, to support both industry and wider society. The company is active in some 100 UK, American, French and international standards committees, working with organisations such as BSI, AFCEN, API, ASME, NACE, CEN and ISO, and influential technical industry forums, such as IIW and TAGSI.
This allows Industrial Members to put forward their needs and new developments for consideration in international standards, and provides them with fast access to authoritative opinions on the application of specific standard requirements and the rationale behind them. Our contribution is also beneficial to the standards-developing organisations, as it reflects the constant interaction with our membership base.
Arc Welding Equipment
Since the 1990s, TWI, currently represented by Geoff Melton, has chaired a joint working group between IEC and ISO to produce the first comprehensive international standard for arc welding equipment (IEC 60974-1).
This standard ensures that the equipment is safe to use and meets the required performance characteristics for the welding process. TWI has also led the development of the electromagnetic compatibility standard for welding equipment, liaising with CISPR and other IEC committees, as well as the European standard for validation of arc welding equipment.
Today, Geoff is chairing a joint working group preparing a standard for carrying out assessments of workers’ exposure to electromagnetic fields, to support the introduction of the European directive in 2016.
TWI Technology Fellow John Wintle has taken on the chairmanship, with Capucine Carpentier as co-chair, of the UK user group of the French standard for the Design and Construction Rules for Mechanical Components (RCC-M code, issued by AFCEN), which has French roots but is expanding internationally.
The user group was created in 2013 to support the UK supply chain companies that use the RCC-M code and provide an effective communication channel with AFCEN, to identify and discuss common issues, as well as to share direct experience between code users.
A major revision to BS7910, ‘Guide to methods of assessing the acceptability of flaws in metallic structures’ was issued in 2013 after several years of effort under TWI’s chairmanship. Technology Fellow Isabel Hadley played a leading role in these developments. In 2014 the associated software, ‘Crackwise v5.0’, which automates the procedures, was released.
In 2014, a committee led by TWI’s Philippa Moore published a new British standard providing guidance on the use of single-edge-notch tension (SENT) tests. The standard, BS 8571:2014, represents the first time that fracture toughness testing using SENT specimens has been standardised, and is of significant interest to TWI Industrial Members in the oil and gas industry, where SENT tests are increasingly carried out to qualify pipeline girth weld procedures.
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