ASME B16.15-2024 PDF

Full title and description

ASME B16.15:2024 — Cast Copper Alloy Threaded Fittings: Classes 125 and 250. This standard specifies requirements for cast copper‑alloy (bronze/brass) threaded pipe fittings in pressure classes 125 and 250 and includes provisions for substituting wrought copper alloys for certain small wrought fittings; it covers ratings, dimensions, materials, marking, threading and testing in both U.S. customary and SI units.

Abstract

Provides dimensional, material and performance requirements for cast copper‑alloy (bronze) threaded fittings in pressure classes 125 and 250. The standard includes pressure‑temperature ratings, designation of reducing openings, marking requirements, minimum casting and material quality, dimensional tolerances, threading criteria and pressure test requirements. It is presented in both SI and U.S. customary units.

General information

• Status: Current / Active.
• Publication date: 2024 (published June 28, 2024).
• Publisher: American Society of Mechanical Engineers (ASME).
• ICS / categories: Pipe and pipeline components; fittings (commonly classified under ICS 23.040.40 / pipeline components and fittings).
• Edition / version: 2024 edition (revises ASME B16.15:2018).
• Number of pages: 34 pages (PDF edition).

Key bibliographic details (publisher, year, page count) as published in the ASME product listing and standards distributors.

Scope

Applies to cast copper‑alloy threaded pipe fittings in pressure classes 125 and 250 and addresses: pressure‑temperature ratings; sizing and designation of reducing openings; marking and identification; minimum casting and material requirements (including allowable wrought substitutions for small plugs, caps, bushings and couplings); dimensional and tolerance limits in SI and U.S. customary units; threading requirements; and pressure testing procedures. It is intended for fittings used in pressure piping systems where the listed materials and pressure classes are appropriate.

Key topics and requirements

• Pressure‑temperature ratings and service class definitions for Class 125 and Class 250 fittings.
• Size designation and method for identifying openings of reducing fittings.
• Dimensional drawings and tolerances in both SI (metric) and U.S. customary units.
• Threading requirements suitable for threaded pressure applications (NPT/NPTF-style pipe threads as applicable to ASME practice).
• Marking and identification requirements (material, class, manufacturer/mark, size or pressure class as required).
• Minimum casting quality and material requirements; permitted alloy specifications and allowable wrought substitutions for small parts (references to common copper alloy specifications such as ASTM B62 and ASTM B584 for applicable alloys).
• Pressure test requirements and acceptance criteria for threaded fittings used in pressure service.

Material and alloy guidance commonly referenced alongside B16.15 includes ASTM B62 (cast copper alloys) and ASTM B584 (cast copper alloy screw‑machine products), which are typically used to specify acceptable chemical and mechanical properties for fittings.

Typical use and users

Used by designers, piping engineers, manufacturers, fabricators, procurement/specification writers, inspection authorities and contractors working with low‑ to medium‑pressure copper‑alloy threaded piping systems (plumbing, HVAC, light industrial, fuel and fluid distribution where bronze/brass threaded fittings are applicable). Manufacturers and testing laboratories also use the standard to demonstrate compliance and to establish production and inspection criteria.

Related standards

Closely related and frequently referenced standards include other ASME B16-series documents covering copper and copper‑alloy fittings and joints (for example ASME B16.18, B16.22, B16.23, B16.24, B16.26, B16.29 and B16.32) as well as relevant ASTM specifications for copper alloys (ASTM B62, ASTM B584). ASME B16.15:2024 revises and supersedes ASME B16.15:2018.

Keywords

ASME B16.15, cast copper alloy fittings, cast bronze threaded fittings, Class 125, Class 250, threaded pipe fittings, pressure‑temperature ratings, dimensions and tolerances, ASTM B62, ASTM B584, marking, pressure testing.

FAQ

Q: What is this standard?

A: ASME B16.15:2024 is the ASME standard that specifies requirements for cast copper‑alloy (bronze/brass) threaded pipe fittings in pressure classes 125 and 250.

Q: What does it cover?

A: It covers pressure‑temperature ratings, sizing and designation of reducing openings, dimensions and tolerances (SI and U.S. units), threading requirements, marking, minimum casting and material quality, allowable small wrought substitutions, and pressure testing requirements for cast copper‑alloy threaded fittings.

Q: Who typically uses it?

A: Engineers, specifiers, manufacturers, fabricators, contractors, inspectors and testing laboratories involved in the selection, manufacture, inspection and use of copper‑alloy threaded fittings for pressure piping systems.

Q: Is it current or superseded?

A: The 2024 edition is the current edition and it revises/supersedes the previous ASME B16.15:2018 edition. Users should confirm they are using the 2024 text for the latest requirements.

Q: Is it part of a series?

A: Yes — B16.15 is part of the larger ASME B16 series of standards addressing valves, flanges and fittings; several adjacent B16 documents cover other copper and copper‑alloy fitting types and joining methods (for example B16.18, B16.22, B16.23, B16.24, B16.26, B16.29, B16.32).

Q: What are the key keywords?

A: Cast copper alloy, cast bronze, threaded fittings, Class 125, Class 250, ASME B16.15, pressure‑temperature rating, dimensions, threading, ASTM B62, ASTM B584.