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SAE J844

Nonmetallic Air Brake System Tubing

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Organization: SAE
Publication Date: 1 December 2012
Status: active
Page Count: 14
scope:

This SAE Standard covers the minimum requirements for nonmetallic tubing as manufactured for use in air brake systems. Non-reinforced products are designated type A and reinforced products, type B. It is not intended to cover tubing for any portion of the system which operates below -40 °C, above +93 °C, above a maximum working gage pressure of 1.0 MPa, or in an area subject to attack by battery acid. This tubing is intended for use in the brake system for connections, which maintain a basically fixed relationship between components during vehicle operation. Coiled tube assemblies required for those installations where flexing occurs are covered by this document. SAE J1131, and SAE J2494-3 to the extent of setting minimum requirements on the essentially straight tube and tube fitting connections which are used in the construction of such assemblies2.

General Requirements

Test temperature shall use ±3 °C as the test tolerance range.

All test times are minimum unless otherwise specified.

Dry air shall be a minimum of -50 °C dew point.

Tubing shall be cut square at 90 Degrees ± 7 degrees.

Precondition all test samples at 0.7 MPa ± 0.1 MPa for 30 s without leakage.

New sample shall be used for all tests.

1. See SAE J1149 for Metallic Air Brake System. Tubing and Pipe.

2. Federal regulations covering designed requirements and accepted applications for coiled tube assemblies are set forth in 49CFR393.45. Conformance to SAE J844 does not imply compliance with Federal regulations for air brake tubing. Sizes 3.97 mm and below may not meet 49CFR571.106 requirements for air brake systems.

Document History

SAE J844
December 1, 2012
Nonmetallic Air Brake System Tubing
This SAE Standard covers the minimum requirements for nonmetallic tubing as manufactured for use in air brake systems. Non-reinforced products are designated type A and reinforced products, type B....
November 1, 2004
(R) Nonmetallic Air Brake System Tubing
(Footnote 1) This SAE Standard covers the minimum requirements for nonmetallic tubing as manufactured for use in air brake systems. Non-reinforced products are designated type A and reinforced...
June 1, 1998
Nonmetallic Air Brake System Tubing
1. Scope--This SAE Standard covers the minimum requirements for nonmetallic tubing as manufactured for use in air brake systems. Nonreinforced products are designated type A and reinforced products...
May 1, 1997
Nonmetallic Air Brake System Tubing
A description is not available for this item.
October 1, 1994
Nonmetallic Air Brake System Tubing, Standard
A description is not available for this item.
June 12, 1990
(R) NONMETALLIC AIR BRAKE SYSTEM TUBING
This SAE Standard covers the minimum requirements for nonmetallic tubing as manufactured for use in air brake systems. No reinforced products are designated type A and reinforced products type B. It...
October 1, 1988
Nonmetallic Air Brake System Tubing
This standard covers the minimum requirements for nonmetallic tubing as manufactured for use in air brake systems. Non-reinforced products are designated type A and reinforced products type B. It is...

References

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