For Brass fittings, what is the ASTM standard equivalent to ASTM 1498?

The ASTM standard for brass fittings that is equivalent to ASTM F1498 (which is for thermoplastic pipe threads) is ASTM B1. This standard, however, is not just for brass fittings but generally governs the dimensions and tolerances for screw threads, including those used in brass and other metal pipe fittings.

ASTM B1

• Title: "Unified Inch Screw Threads (UN and UNR Thread Form)"
• Scope: ASTM B1 provides specifications for screw threads used on various materials, including metals like brass. This standard ensures that the threads are consistent and compatible with other components, much like how ASTM F1498 does for thermoplastic threads. It covers the design, dimensions, and tolerances for unified inch screw threads.
• Application: Used in a wide range of applications, including brass fittings, ensuring that the threads will properly mate with corresponding fittings or pipes, creating a secure and leak-proof connection.

For Tapered Pipe Threads (like NPT) in Brass:

• ASTM B1.20.1: "Pipe Threads, General Purpose (Inch)"
  • This standard specifically covers the dimensional requirements for tapered pipe threads, such as those used in brass fittings. It is the go-to standard for NPT (National Pipe Thread) threads in brass fittings, ensuring they meet the necessary criteria for fit and function in pressurized piping systems.

These standards together ensure that brass fittings have threads that are dimensionally consistent and compatible with other threaded components in a system, much like how ASTM F1498 does for thermoplastic fittings.