Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions, tolerances and designation

This document establishes the specifications for pipe threads designed with non-pressure-tight connections on the thread itself. It defines the fundamental dimensions, tolerance limits, and designations required for compatibility across various industrial applications involving fluid and gas piping systems. The standard outlines the geometric characteristics necessary to ensure that threaded components fit together properly while relying on external sealing methods, such as gaskets or face seals, rather than the thread form to prevent leakage. Detailed parameters cover thread pitch, diameter, flank angles, and thread length, providing a consistent framework for manufacturing and inspection processes. By adhering to these guidelines, manufacturers and engineers can achieve interchangeability between parts produced in different regions or facilities. The technical requirements cover both internal and external thread forms, ensuring that mating components align correctly without excessive play or interference. This specification is part of a broader series addressing pipe thread systems and serves as a foundational reference for design documentation, quality control procedures, and procurement specifications in sectors utilizing non-sealing threaded joints for their operational safety and efficiency.