This specification establishes the requirements for a coupling for use with low pressure, low and medium high temperature, air ducts.
Types. Couplings shall be of two types as follows:
Type I – 450 °F, NAS520
Type II – 250 °F, NAS521
- Edition:
- 3
- Published:
- 03/31/2016
- Number of Pages:
- 4
- File Size:
- 1 file , 47 KB
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