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General Tube Specifications

1. Commodity

Phosphorized seamless copper tube.

2.  Scope

This specification covers anneals and hard seamless copper tube in Level Wound Coil (LWC)

Refer to abbreviations here.

3. Quality

Fabrication of phosphorized seamless copper tube C12200 with the following quality:

3.1 General Quality

  1. The tube shall be homogeneous and free from cracks, die marks, and dents which are detrimental to practical use.
  2. The tube shall be practically round.
  3. Both inner and outer surface of the tube shall be clean and free from oxides, dirt, chips, and oil, which are harmful to practical use.
  4. The whole length of the tube shall be passed through an eddy current test in accordance with ASTM E-243 and all defects in the the tube shall be clearly marked with black ink, 20 inches minimum in length. The number of signals for any LWC or Supercoil (SC) shall not exceed the number specified in the following table.

Table 1 Maximum Number of Signals Per LWC or SC

Coil Size OD Max. No. of signals
SC All Smooth and Groove Tube Full Coils 12
SC All Smooth and Groove Tube Half Coils 6
LWC All 1/4 ” and 3/16 ” OD Smooth Tube 6
LWC All other OD Sizes Smooth and Groove Tube 4

3.2 Chemical Composition ASTM B-68, B-75, B-743

Chemical composition of the tube shall conform to Table 2

Table 2 Chemical Composition

Type of Copper Designation           Copper UNS Number Chemical Composition
Copper Minimum Phosphorous
Phosphorized,                      High residual                   Phosphorous C 12200 99.90% .015 – .040 %

3.3 Mechanical Properties ASTM B-68, B-75, B-743

Mechanical properties of the tube shall conform to Table 3

Table 3 Mechanical Properties

3.4 Dimension and Tolerance

Dimension and Tolerance of the tube shall conform to attached Tables 4 and 5 from ASTM B-68, ASTM B-75, ASTM B-251, ASTM B-743

Table 4 Wall Thickness Tolerances

Note: Maximum Deviation at Any Point – The above tolerances are plus and minus; if tolerances all plus or all minus are desired, double the values given. When round tube is ordered by OD and ID dimensions, the maximum +/- deviation from the nominal wall thickness, at any point shall not exceed the values, given the table above, by  more than 50%.

Table 5 Average Outside Diameter Tolerances

[table. see spreadsheet]

 

 

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