air conditioning & refrigeration tube
Copper tube used for air conditioning and refrigeration applications in the field (sometimes called "refer" or "ACR" tube) is an almost pure copper material meeting the requirements ofASTM B 280 - Standard Specification for Seamless Copper Tube for Air Conditioning and Refrigeration Field Service. It is manufactured from copper alloy C12200 having a chemical composition of a minimum of 99.9% Copper (Cu) and Silver (Ag) combined and a maximum allowable range of Phosphorous (P) of 0.015 % - 0.040 %.
B 280 tube is produced in straight lengths or coils in tempers H58 or O60 respectively, although annealed straight lengths may be special ordered. Straight lengths are provided in sizes from 3/8" O.D. through 4 1/8" O.D. while annealed coils are supplied in sizes ranging from 1/8" O.D. through 1 5/8" O.D. ACR tube is required to be identified in the following fashion: Coils: The name or trademark of the manufacturer and ACR shall be permanently incised on each tube¼" or largerat Intervals not greater than 1½ ft. Hard Straight Lengths: The name or trademark of the manufacturer and a mark indicating either L or ACR shall be incised at intervals not greater than 1½ ft. along the length of the tube. Hard straight lengths shall further be marked with a blue stripe containing the manufacturer's name or trademark, the nation of origin, outside diameter and ACR repeating at intervals not greater than 3 ft.
Air conditioning and refrigeration tube (ASTM B 280) either coiled or straight length is further required to be cleaned and capped prior to shipping.
The maximum particulate residue limit for coils or straight lengths is 0.0035 g/ft2 or as listed in Table 2 and Table 3 of the standard.
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