FLEXIBLE METAL HOSE


INSTALLING FLEXIBLE METAL HOSE

To assure maximum service life, the following precaution should be adhered to when installing a flexible metal hose assembly.


 

CORRECT

 

WRONG

Flexible Metal Hose - Correct Flexible Metal Hose - Wrong
Flexible Right Hoses Flexible Wrong Hoses
Industrial Flexible Hose - Right Industrial Flexible Hose - Wrong
Flexible Hosing Flexible Hose Fitting
  • Avoid Overbending
  • Avoid Improper Handling
  • Avoid Torque
    and Twisting

HOSE SIZE & THREAD SIZE SELECTING CHART FOR ALL TYPES OF HOSES.

Hose Size inches mm
nw
Corresponding Thread Stand Pipe NPTF*
BSP
inches
NPT inches SAE inches Metric Pipe dia mm Length mm Thread inches TPI
3/16 4 1/4 1/4 7 /16-20UNF M12x1.5
M16x1.5
6
8
20
22
65 27
18
1/4 6 1/4 1/4 7 /16-20UNF
1 /2-20UNF
9 /16-18UNF
5 /8-18UNF
M14x1.5
M16x1.5
M18x1.5
8
10
12
22
24
25
65 27
18
18
5/16 8 3/8 3/8 1 / 2-20UNF
9 /16-18UNF
5 / 8-18UNF
M16x1.5
M20x1.5
10
12
24
25
65 18
18
3/8 10 3/8 3/8
1 /2
1 / 2-20UNF
9 /16-18UNF
3 / 4-16UNF
7 / 8-14UNF
M18x1.5
M22x1.5
12
14
10
25
27
24
65 18
18
14
1/2 13 1/2 1/2 9 /16-18UNF
3 / 4-16UNF
7 / 8-14UNF
1.1/16-12UNF
M22x1.5
M24x1.5
M26x1.5
15
16
18
20
25
30
25
32
65 18
14
14
5/8 16 5/8
3/4
3/4 3 / 4-16UNF
7 / 8-14UNF
1.1/16-12UNF
M26x1.5 18
20
25
23
65 14
3/4 20 3/4
1
3/4
1
7 / 8-14UNF
1.1/16-12UNF
1.3/16-12UNF
1.5/16-12UNF
M30x1.5
M30 x 2.0
M36 x 2.0
22
25
25
34
65 14
11½
1 25 1
1
1.5 /16-12UNF
1.5 / 8-12UNF
M38x1.5
M42x2.0
28
30
25
40
36
40
65 11
1/2
32

1.5 /16-12UNF
1.7 /8-12UNF
M45x1.5
M52x1.5
38
30
35
38
35
30
50 11½
38 1
2

2
1.7 /8-12UNF
2 1/ 4-12UNF
2 1/ 2- 2UNF
M52x1.5
M52x2.0
42
50
36
70
  11½
11½
2 50 2 2 2 1/2-12UNF M65x2.0 - - 2 11½
63
3

3
3-12UNF M78x2.0 - - - -
3 76 3 3 - M100x2.0 - - - -

Note

The National Pipe Tapered Thread for fuels is a dryseal thread used for both for male & female ends .The Interface crest and root fit of the mating threads produces the seal .(This thread should not be confused with American Standard NPT thread which does not produce and crest and root seal.)