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About This Item


Full Description

This document provides terms and definitions and example figures of imperfections and defects that occur in manufacturing steel tubulars. The words "imperfection" and "defect" refer to metallurgical and other features of steel tubular products, which may or may not affect the performance of the products. Inspection requirements and acceptance criteria are not defined in this document, and are found instead in the respective product specification.

Document History

  1. API Bull 5T1


    Imperfection and Defect Terminology

    • Most Recent
  2. API Std 5T1 (R2010)

    Standard on Imperfection Terminology

    • Historical Version