ASTM B280-2018 pdf free download
ASTM B280-2018 pdf free download.Standard Specification for Seamless Copper Tube for Air Conditioning and Refrigeration Field Service
3. Terminology
3.1 Definitions: 3.1.1 average diameter (for round tubes only), n—the aver- age of the maximum and minimum outside diameters, or maximum and minimum inside diameters, whichever is applicable, as determined at any one cross section of the tube. 3.1.2 bright anneal, n—a thermal treatment carried out in a controlled atmosphere so that surface oxidation is reduced to a minimum and the surface remains relatively bright. 3.1.3 coil, n—a length of the product wound into a series of connected turns. The unqualified term “coil” as applied to tube usually refers to a bunched coil. 3.1.3.1 bunched, n—a coil in which the turns are bunched and held together such that the cross section of the bunched turns is approximately circular. 3.1.3.2 level or traverse wound, n—a coil in which the turns are wound into layers parallel to the axis of the coil such that successive turns in a given layer are next to one another. (Sometimes called “helical coil.”) 3.1.3.3 single layer flat, n—a coil in which the product is spirally wound into a single disc-like layer. (Sometimes called “pancake coil” or “single layer spirally wound coil.”) 3.1.3.4 double layer flat, n—a coil in which the product is spirally wound into two connected disc-like layers such that one layer is on top of the other. (Sometimes called “double layer pancake coil” or “double layer spirally wound coil.”) 3.1.4 lengths, n—straight pieces of the product.3.1.4.1 specific, n—straight lengths that are uniform in length, as specified, and subject to established length toler- ances. 3.1.4.2 standard, n—uniform lengths recommended in a Simplified Practice Recommendation or established as a Com- mercial Standard. 3.1.5 tube, seamless, n—a tube produced with a continuous periphery in all stages of the operations. 3.1.5.1 tube, air conditioning, n—a seamless copper tube conforming to a standard series of sizes (Table 1) and to specified internal cleanness requirements, normally furnished in drawn temper straight lengths with the ends capped or sealed. 3.1.5.2 tube, refrigeration service, n—a seamless copper tube conforming to a standard series of sizes (Table 2) and to special internal cleanliness and dehydration requirements, normally furnished in soft temper coils and with ends capped or sealed. 3.2 Definitions ofTerms Specific to This Standard: 3.2.1 capable of—the test need not be performed by the producer of the material. However, ifsubsequent testing by the purchaser establishes that the material does not meet these requirements, the material shall be subject to rejection.
5. Materials and Manufacture
5.1 Materials—The material of manufacture shall be billets, bars, or tube and shall be of such soundness as to be suitable for processing into the tubular products described. 5.2 Manufacture: 5.2.1 The tube shall be manufactured by such hot or cold working processes as to produce a homogeneous uniform wrought structure in the finished product. The tube shall be cold drawn to the finished size and wall thickness. 5.2.2 Coiled lengths specified O60, soft annealed temper, shall be bright annealed after coiling, then dehydrated, and capped, plugged, crimped, or otherwise closed at both ends so as to maintain the internal cleanness ofthe tubing under normal conditions of handling and storage. 5.2.3 Straight lengths specified H58 drawn general purpose shall be cleaned and capped, plugged, or otherwise closed at both ends so as to maintain the internal cleanness of the tubing under normal conditions of handling and storage.
6. Chemical Composition
6.1 The chemical composition shall conform to the chemi- cal requirements in Table 3 for the specific type of copper. 6.1.1 These limits do not preclude the presence of other elements. When included in the contract or purchase order, and agreed upon by the manufacturer or supplier and the purchaser, limits shall be established and analysis required for unnamed elements.
