US 12,305,792 B2
Multilayer composite pipe and pipe assemblies including reflective insulation
Donald Bradley Campbell, Gallatin, TN (US); and Jordan Strunk, Portland, TN (US)
Assigned to Titeflex Corporation, Springfield, MA (US)
Filed by Titeflex Corporation, Springfield, MA (US)
Filed on Jul. 17, 2020, as Appl. No. 16/931,571.
Application 16/931,571 is a continuation of application No. PCT/US2020/024916, filed on Mar. 26, 2020.
Claims priority of provisional application 62/957,491, filed on Jan. 6, 2020.
Claims priority of provisional application 62/884,305, filed on Aug. 8, 2019.
Claims priority of provisional application 62/824,235, filed on Mar. 26, 2019.
Prior Publication US 2020/0400251 A1, Dec. 24, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. F16L 9/147 (2006.01); F16L 9/04 (2006.01); F16L 9/12 (2006.01); F16L 59/07 (2006.01); F25B 41/40 (2021.01)
CPC F16L 9/147 (2013.01) [F16L 9/04 (2013.01); F16L 9/121 (2013.01); F16L 9/123 (2013.01); F16L 59/07 (2013.01); F25B 41/40 (2021.01)] 6 Claims
OG exemplary drawing
 
1. A composite refrigeration line set comprising:
a suction line; and
a return line;
characterized in that one or more of the suction line and the return line are a composite refrigeration line tube consisting of:
an inner plastic tube;
a first adhesive layer circumferentially surrounding the inner plastic tube;
an aluminum layer circumferentially surrounding the first adhesive layer and the inner plastic tube; and
a second adhesive layer circumferentially surrounding the aluminum layer; and
an outer plastic layer circumferentially surrounding the second adhesive layer and the aluminum layer;
wherein:
the aluminum layer is an alloy selected from the group consisting of:
AL 3005, AL 3105, AL 6061, and AL 8006;
the alloy has less than 0.8% magnesium by mass;
the aluminum layer does not include a corrosion-inhibiting protective coating; and
the aluminum layer has a thickness within a corresponding range from the following table
 
 
 
 Pipe Size (in) AL 3005-O (in) AL 3105-O (in)
 
 
 
 1/4″ 0.014-0.02  0.016-0.022
 
 3/8″ 0.018-0.026 0.022-0.03 
 
 1/2″ 0.026-0.035 0.031-0.041
 
 5/8″ 0.033-0.045 0.039-0.051
 
 3/4″ 0.041-0.053 0.049-0.059
 
 7/8″ 0.045-0.061 0.055-0.067
 
 1 1/8″ 0.061-0.077 0.071-0.087
 
 
 
 Pipe Size (in) AL 6061-O (in) AL 8006-O (in)
 
 
 
 1/4″ 0.014-0.022 0.018-0.024
 
 3/8″  0.02-0.028 0.024-0.033
 
 1/2″  0.03-0.037 0.033-0.043
 
 5/8″ 0.037-0.047 0.041-0.055
 
 3/4″ 0.047-0.057 0.051-0.065
 
 7/8″ 0.051-0.063 0.059-0.073
 
 1 1/8″ 0.067-0.081  0.075-0.093.