ASME Section V (Non-Destructive Examination) — Definition & NDT Use
ASME Boiler and Pressure Vessel Code Section V provides requirements and procedures for all nondestructive examination methods including UT, RT, MT, PT, ET, and VT. It is the primary NDT standard for pressure vessels and power generation equipment. ASME Section V specifies technique parameters, acceptance criteria, and qualification requirements for NDT procedures and personnel. Most commercial NDT specifications reference ASME Section V.
As a written standard, ASME Section V translates physical inspection know-how into auditable rules: who is qualified, what equipment is acceptable, how the procedure must be written, and what counts as a rejectable indication. On a pressure vessel, the procedure follows the API 510 inspection plan: thickness monitoring on shell and head, internal visual on a cycle, NDE on nozzle welds, and a fitness-for-service review whenever a reading falls below a calculated minimum. A standard's strength is that two independent crews can reach the same disposition on the same indication; that consistency is the entire point of the document and why audit findings cite paragraph numbers rather than opinions.
ASME Section V is invoked by a contract, a purchase order, or a regulator; once invoked, it controls procedure, personnel, and acceptance criteria for the entire scope of work.
- Etymology / Origin
- ASME BPVC Section V was first published in 1968 as the dedicated NDE volume of the Boiler & Pressure Vessel Code.
- Formula
- Section V references methods (Article 2 RT, Article 4 UT, Article 6 PT, Article 7 MT, Article 8 ET, Article 9 VT) and points to ASTM practices for execution detail.
- Units
- N/A (procedural code).
- Typical Range
- Used across ASME Sections I, III, VIII, XI, B31.1, B31.3 wherever NDE is required; new edition every 3 years (2023 latest).
- Measured / Produced By
- Compliance demonstrated through written, qualified procedures + qualified personnel + documented examinations.
- Code References
- ASME BPVC Section V (NDE); Section V T-150 (procedure qualification); Article 1 General Requirements
- Worked Example
- An ASME VIII Div 1 vessel weld requiring full RT under UW-51: the procedure cites ASME V Article 2, qualified per T-150, executed by SNT-TC-1A Level II, results dispositioned per UW-51 acceptance criteria.
API 510
In-service pressure-vessel inspection code.
ASME BPVC Section VIII
Construction of pressure vessels — sets the design baseline being preserved by NDT.
A common misreading of ASME Section V is to apply the latest edition's acceptance criteria to a part fabricated under a previous edition; contracts usually freeze the edition, and the audit trail must reflect that.
What does "ASME Section V" mean in NDT?
ASME Boiler and Pressure Vessel Code Section V provides requirements and procedures for all nondestructive examination methods including UT, RT, MT, PT, ET, and VT. It is the primary NDT standard for pressure vessels and power generation equipment
Who enforces ASME Section V?
Enforcement comes from the contract (the purchaser cites the standard), the regulator (where the jurisdiction has adopted the standard into law), and the third-party inspection body or owner-user inspection group performing audit oversight.
What other NDT concepts should I read alongside ASME Section V?
The most directly related entries in this glossary are "asme code", "ndt standard", "qualification"; reading those together gives you the surrounding vocabulary used in inspection reports and procedures.