ASTM B241/B241M-22 PDF

Full title and description

ASTM B241/B241M-22 — Standard Specification for Aluminum and Aluminum-Alloy Seamless Pipe and Seamless Extruded Tube. This specification covers aluminum and aluminum‑alloy seamless pipe and seamless extruded round tube produced from hollow extrusion ingot (cast in hollow form, drilled, or pierced) and extruded by the die‑and‑mandrel method, including applicable chemical, mechanical, and acceptance requirements for pressure and related applications.

Abstract

This international standard defines requirements for alloys, tempers, dimensions, production methods, chemical composition testing, mechanical property testing (tension), and stress‑corrosion testing for seamless aluminum pipe and extruded seamless tube intended primarily for pressure and transmission applications. The standard includes metric (B241M) and inch‑pound units and contains guidance for inclusion of new alloys.

General information

• Status: Active standard (current edition B241/B241M‑22).
• Publication date: Current edition approved Oct 1, 2022; published November 2022.
• Publisher: ASTM International.
• ICS / categories: Nonferrous metals and alloys — ICS code 77.150.10 (aluminum and aluminum alloys).
• Edition / version: B241/B241M‑22 (current edition).
• Number of pages: 20 pages (document length as published).

Scope

The standard applies to aluminum and aluminum‑alloy seamless pipe and seamless extruded round tube in specified alloys and tempers intended for pressure applications, including sizes listed by relevant ANSI dimensional tables and nonstandard sizes produced as seamless extruded tube. It also incorporates extruded pipe and tube for oil & gas transmission that were previously covered under Specification B345/B345M and specifies SI and inch‑pound units to be used independently.

Key topics and requirements

• Material types: aluminum and aluminum‑alloy seamless pipe and seamless extruded round tube in specified alloys and tempers.
• Manufacturing: produced from hollow extrusion ingot (cast hollow, drilled, or pierced) and extruded using die and mandrel methods.
• Chemical composition: conformity to specified alloy chemistry with testing per relevant ASTM chemical and spectrochemical test methods (for example E34, E227, E607, E1251).
• Heat treatment and tempers: allowances for solution heat treatment and quenching at the press (T4, T6 types) in accordance with practice B807 where applicable.
• Mechanical tests: tensile property requirements with testing per ASTM B557/B557M and acceptance criteria for mechanical properties.
• Stress‑corrosion testing: stress‑corrosion cracking test on extruded tube per ASTM G47.
• Clad tube: specification for aluminum alloy internal cladding where applicable (clad thickness roughly 10% of total wall thickness for inside‑only clad).
• Units and tolerances: both SI and inch‑pound units are provided and treated independently; mixing units may cause nonconformance.

Typical use and users

Used by manufacturers, quality engineers, purchasers, and inspectors of aluminum pressure pipe and tube for industries such as oil & gas transmission, pressure vessel and piping systems, heat exchangers (where applicable), aerospace and defense applications (standard approved for use by certain U.S. government agencies), and general industrial users requiring seamless extruded aluminum pipe and tube to defined mechanical and chemical specifications.

Related standards

Related and cross‑referenced ASTM standards include (but are not limited to) B210/B210M (drawn seamless tubes), B221/B221M (extruded tubes), B234/B234M (drawn seamless tubes for condensers and heat exchangers), B429/B429M (seamless condenser/heat‑exchanger tubes with integral fins), B483/B483M (drawn tube for general‑purpose applications), B557/B557M (tension test methods), and practice B807 (press quenching). ASME Code sections referring to aluminum piping/specifications may also reference B241/B241M.

Keywords

Aluminum, aluminum‑alloy, seamless pipe, seamless extruded tube, extrusion, hollow extrusion ingot, die and mandrel, T4, T6, tensile test, stress‑corrosion, clad tube, ANSI H35.2, pressure applications.

FAQ

Q: What is this standard?

A: ASTM B241/B241M‑22 is an ASTM International specification that sets chemical, mechanical, dimensional, and testing requirements for aluminum and aluminum‑alloy seamless pipe and seamless extruded round tube intended primarily for pressure and transmission applications.

Q: What does it cover?

A: It covers the allowed alloys and tempers, production methods (from hollow extrusion ingot, drilled/pierced, extruded with die and mandrel), chemical composition testing, tensile testing, stress‑corrosion testing, dimensional limits, and acceptance criteria for both metric and inch‑pound units.

Q: Who typically uses it?

A: Manufacturers of seamless aluminum pipe and tube, procurement and quality personnel in oil & gas, pressure piping, aerospace/defense contractors, testing laboratories, and specification writers for projects requiring qualifying aluminum pressure tubing.

Q: Is it current or superseded?

A: Current — the active edition is B241/B241M‑22 (approved Oct 1, 2022; published Nov 2022). Users should confirm any amendments or corrigenda before application.

Q: Is it part of a series?

A: Yes — it is part of the ASTM B‑series for light metals and alloys (Committee B07) and is related to other ASTM specifications for aluminum tube and pipe (for example B210, B221, B234, B429, B483) and practices referenced within the standard.

Q: What are the key keywords?

A: Aluminum, seamless pipe, extruded tube, alloy, temper, die and mandrel extrusion, tensile properties, stress‑corrosion, clad tube, pressure applications.