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NBBI NB 23 (NBIC) National Board Inspection Code - Part 2 Inspection

NBBI NB 23 (NBIC) National Board Inspection Code - Part 2 Inspection by The National Board of Boiler and Pressure Vessel Inspectors (25th) — available for i...

The National Board of Boiler and Pressure Vessel Inspectors 25th

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NBBI NB 23 (NBIC) Part 2 – Inspection is the volume of the National Board Inspection Code that establishes rules, methods, and guidance for in‑service inspection of pressure‑retaining items and their pressure relief devices. It is used to assess the condition, integrity, and continued fitness for service of boilers, pressure vessels, and related equipment throughout their operating life. Purpose and scope NBIC Part 2 focuses on equipment already in service, rather than on original construction or installation. It provides a structured framework for inspecting and evaluating pressure‑retaining items, identifying damage and degradation, and determining when repairs, alterations, or retirement are needed. The scope typically includes boilers, pressure vessels, pressure piping, and pressure relief devices used to protect that equipment. Major topics covered NB 23 (NBIC) Part 2 generally addresses: Inspection organization and responsibilities Defines qualifications and responsibilities of inspectors, owner‑users, and repair organizations; outlines required procedures and documentation for inspection programs. Types and intervals of inspection Describes internal, external, and on‑stream inspections; sets expectations for inspection frequency based on service, risk, and jurisdictional requirements. Damage mechanisms and deterioration Provides guidance on common failure modes such as corrosion, erosion, cracking, creep, fatigue, and mechanical damage, and how to recognize them during inspection. Examination methods and techniques Covers visual examination and nondestructive examination (NDE/NDT) methods, such as ultrasonic testing, radiography, magnetic particle, liquid penetrant, and leak testing, including selection and application. Fitness‑for‑service and evaluation Offers criteria and methodologies to evaluate inspection findings, assess remaining life, and determine whether equipment can continue in service, be derated, repaired, or must be removed from service. Documentation, records, and reports Specifies what inspection records, data, and reports must be maintained to demonstrate compliance and support future evaluations and audits. Typical users and applications NBIC Part 2 is used by authorized inspection agencies, in‑service inspectors, and jurisdictional authorities responsible for enforcing safety regulations. Owner‑users, plant engineers, and integrity management teams rely on it to develop inspection plans, risk‑based inspection programs, and condition assessments for pressure equipment fleets. Repair organizations also use Part 2 to understand the inspection prerequisites and acceptance criteria that guide repair and alteration decisions. Role within the NBIC set Within the NB 23 NBIC 4‑volume set, Part 2 works in concert with: Part 1 – Installation: establishing correct initial installation conditions that inspectors will later evaluate. Part 3 – Repairs and Alterations: providing inspection‑based input that drives repair or alteration scope and verifying completed work. Part 4 – Pressure Relief Devices: aligning in‑service inspection of pressure relief devices with overall equipment integrity assessments. Together, NBIC Part 2 forms the core of an organized in‑service inspection program, helping ensure continued safe, reliable, and compliant operation of pressure‑retaining items over their entire service life.