Additionally, Article 8 requires at representative locations. A loss of back-wall echo > 50% accompanied by a front-surface echo indicates a large planar discontinuity.

of ASME Boiler and Pressure Vessel Code (BPVC) Section V mandates the requirements for ultrasonic examination of welds in materials used for pressure vessels, piping, and other code-stamped components. It applies to:

These rules only become mandatory when they are explicitly "invoked" by a referencing code section (e.g., Section I for power boilers or Section VIII for pressure vessels) or by a purchaser's specific contract. 2. Key Mandatory Appendices

Acceptance criteria are always found in the referencing Code Section . For example:

The primary scope of Article 8 involves the detection and characterisation of surface and subsurface discontinuities in metallic materials—most notably and other tubular products.

In the world of pressure vessels, piping, and nuclear components, the integrity of materials is non-negotiable. The American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (BPVC) provides the gold standard for construction. Within this code, is the dedicated volume governing Non-Destructive Examination (NDE) .