Tapered thread penetration

Description:The standard for Nominal Pipe Size often abbreviated NPS, which should not be confused with the symbol NPS for the straight thread form standard is loosely related to the inside diameter of Schedule 40 series of sizes. Because of the pipe wall thickness of Schedule pipe, the actual diameter of the NPT threads is larger than the Nominal Pipe Size outside diameter, and considerably so for small sizes. Thus the inside diameter of a given size of Schedule pipe differs from the Nominal Pipe Size, while outside diameters for a given nominal Schedule size are the same between Schedules. Pipe of a given size in a different Schedule than Schedule 40 provides a different wall thickness, while maintaining the same outside diameter and thread profile as Schedule The sealants, where used, are typically thread seal tape or pipe dope sometimes plumber's putty. As the thread body is tapered 0. The various types of pipe threads are designed for use both with or without thread sealants, [1] as particular applications demand.

Views: 9225 Date: 2018-10-21 Favorited: 29