BS 7910, guide to methods for assessing the acceptability of flaws in metallic structures, is a British Standard code of practice for the assessment of flaws (weld defects in particular) using fracture mechanics principles.
The technique is also referred to as an engineering critical assessment (ECA)[1] or damage tolerance, and is complementary to other methods of weld quality assurance.
The standard was first introduced in 1980 as a fracture and fatigue assessment procedure, when it was known as PD 6493.
For safety-critical items such as aircraft, pipelines and pressure vessels, the failure of a single component due to the presence of a flaw can threaten human life, as well as having severe economic and environmental consequences.
A fitness-for-service procedure such as BS 7910 allows flaws to be evaluated consistently and objectively, using fracture mechanics principles.