SAE J527:2000 pdf download Brazed Double Wall Low-Carbon Steel Tubing
1. Scope—This SAE Standard covers brazed double wall low-carbon steel tubing intended for general automotive, refrigeration, hydraulic, and other similar applications requiring tubing of a suitable quality for bending, flaring, beading, forming, and brazing.
2. References
2.1 Applicable Publications—The following publications form a part of this specification to the extent specified herein. Unless otherwise specified, the latest issue of SAE publications shall apply.
2.1 .1 SAE P UBLICATION —Available from SAE, 400 Commonwealth Drive, Warrendale, PA 1 5096-0001 .
SAE J1 677—Tests and Procedures for SAE Low-Carbon Steel and Copper Nickel Tubing
2.1 .2 ASTM P UBLICATION —Available from ASTM, 1 00 Barr Harbor Drive, West Conshohocken, PA 1 9428-2959.
ASTM A 254—Standard Specification for Copper Brazed Steel Tubing
2.2 Related Publications—The following publications are provided for information purposes only and are not a required part of this document.
2.2.1 SAE P UBLICATION —Available from SAE, 400 Commonwealth Drive, Warrendale, PA 1 5096-0001 .
SAE J409—Product Analysis-Permissible Variations from Specified Chemical Analysis of a Heat or Cast of Steel
SAE J51 2—Automotive Tube Fittings
SAE J51 3—Refrigeration Tube Fittings-General Specifications
SAE J51 4—Hydraulic Tube Fittings
SAE J51 6—Hydraulic Hose Fittings
SAE J533—Flares for Tubing
SAE J1 065—Pressure Ratings for Hydraulic Tubing and Fittings
SAE J1 290—Automotive Hydraulic Brake System—Metric Tube Connection
SAE J1 453—O-Ring Face Seal
3. Manufacture—The tubing shall be made from a single or double strip of steel shaped into the form of a double-wall tubing, the walls of which are secured and sealed by copper brazing in a controlled atmosphere. The braze shall be uniform with no evidence of a bead on either the inside or outside of the tubing. Typically this type of tubing is available in both coiled and straight condition. Straightness requirements should be agreed upon between supplier and purchaser.
4. Dimensions and Tolerances—The standard nominal diameters and the applicable dimensions and tolerances are shown in Table 1 .
5. Manufacturing Standards 5.1 Tubing End Condition—The tubing will be produced using normal mill cut-off practices. This will include, but is not limited to single-cut ends, double-cut ends, saw-cut ends, and rotary cut ends. Care will be taken to minimize the distortion of the tube ends. Ends that require further processing will be by agreement between the producer and purchaser.
5.2 Surface Finish—Surface imperfections such as handling marks, die marks, or shallow pits shall not be considered injurious defects provided such imperfections are not detrimental to the function of the tubing, and these imperfections are within the tolerances specified for diameter and wall thickness. The removal of such surface imperfections is not required. A slight seam lift or separation on the outside bevel edge of the outside wall on double wall tubing is not considered an injurious defect during end forming operations, provided that the seam condition doesn’t effect the sealing area of the end form. Sealing surfaces shall be smooth and free from nicks, pit marks, and any other defects that prevent sealing.
SAE J527:2000 pdf download
