AS D26-1972 (R2018)

Table of Contents

SECTION 1. SCOPE AND SIZE DESIGNATION
1.1 Scope
1.2 Size Designation
1.3 Deviation from Standard
SECTION 2. DIMENSIONS AND TOLERANCES APPLYING TO
ALL FITTINGS
2.1 General
2.2 Bar Sections
2.3 Hole Diameter
2.4 Angular Tolerance
2.5 Passages
2.6 Wall Thickness
2.7 Contour
SECTION 3. SCREW THREADS
3.1 Straight Screw Threads
3.2 Pipe Threads
SECTION 4. MATERIALS AND MANUFACTURE
4.1 Material
4.2 Manufacture
4.3 Sealing Surfaces
4.4 Workmanship
4.5 Finish
4.6 Marking
SECTION 5. DESIGN PRESSURES AND TEST REQUIREMENTS
5.1 Design Pressures
5.2 Type Test of Assembled Joint
5.3 Wrenching Test for Inverted Flared Nuts
SECTION 6. FLARED TYPE FITTINGS
6.1 Dimensions and Tolerances
6.2 Concentricity of Seats
Figures and Tables
SECTION 7. INVERTED FLARED TYPE FITTINGS
7.1 Dimensions and Tolerances
7.2 Concentricity of Seats
7.3 Thread Relief
Figures and Tables
SECTION 8. BALL SLEEVE (COMPRESSION) TYPE FITTINGS
8.1 Dimensions and Tolerances
Figures and Tables
SECTION 9. DIMENSIONS OF SINGLE AND DOUBLE 45-DEGREE
FLARES AND TUBING
9.1 Dimensions and Tolerances
9.2 Squareness
9.3 Workmanship
Figures and Tables
APPENDICES
A Gauges and Gauging For Inverted Flared Type Fittings
B SAE Identification Code For Automotive Tube and Pipe
Fittings

Abstract

Provides a range of tables covering dimensions of flared, inverted flared and compression type fittings in the range 1/8 in. to 1 in. The Standard is intended primarily for the automotive industry, but the fittings are also used extensively in other sections of industry.
RECONFIRMATION NOTICE
Major stakeholders of this publication have reviewed the content of this publication and in accordance with Standards Australia procedures for reconfirmation, it has been determined that the publication is still valid and does not require change.
Certain documents referenced in the publication may have been amended since the original date of publication. Users are advised to ensure that they are using the latest versions of such documents as appropriate, unless advised otherwise in this Reconfirmation Notice.
Approved for reconfirmation in accordance with Standards Australia procedures for reconfirmation on 29 August 2018.

Scope

This standard relates to tube fittings of the following types: 45-degree flared ( 1/8- 1 in) Inverted flared ( 1/8- 3/4in) Ball sleeve ( 1/8- 3/4in).

The fittings are intended primarily for automotive use, and are screwed Dryseal American Standard Taper Pipe thread (NPTF) and Unified threads.

NOTE: Other fittings in common use are screwed with British Standard Pipe taper threads and Unified threads. The BSP thread is similar to the NPTF thread, having the same t.p.i. in the 1/2in and 3/4in sizes, and differing by not more than one t.p.i. in the other sizes. BSP and NPTF threads are, however, not compatible, having different thread forms and methods of sealing, and the fittings are not interchangeable in any sizes.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Standards Australia
ProductNote	Reconfirmed 14/09/2018. This standard has been reconfirmed in Australia in 2018 and remains current in New Zealand. Reconfirmation Notice 14/09/2018
Pages
ISBN
Committee	ME-054
Supersedes	Doc 1787 (1971)