
13
Table 4 - Pressure Rating for BSPP and NPT Termination Connectors (Metric)*
Tube Material Tube
O.D.
Thread
Size
Wall Thickness - Maximum Tube Assembly Rating - PSI (bar)*
0.035 0.049 0.065 0.083 0.095 0.154 0.188
Stainless Steel
316
(ASTM A269)
1/4” 1/4” 5,100 (350) 7,500 (510) 9,130 (630) 9,130 (630)
3/8” 1/4” 3,300 (220) 4,800 (330) 6,600 (450) 8,600 (590) 9,130 (630)
3/8” 3/8” 3,300 (220) 4,800 (330) 6,600 (450) 8,600 (590) 8,700 (600)
1/2” 1/2” 2,600 (170) 3,700 (250) 5,100 (350) 6,700 (460) 7,250 (500)
5/8” 3/4” 2,950 (200) 4,000 (270) 5,200 (350) 5,800 (400)
3/4” 3/4” 2,400 (160) 3,300 (220) 4,250 (290) 4,950 (340) 5,800 (400)
1” 1” 2,400 (160) 3,150 (210) 3,150 (210) 5,800 (400) 5,800 (400)
INCONEL®
Alloy 625
(ASTM B444-06)
1/4” 1/4” 10,000 (690) 10,000 (690) 10,000 (690)
3/8” 1/4” 7,100 (480) 10,000 (690) 10,000 (690) 10,000 (690)
3/8” 3/8” 7,100 (480) 9,570 (660) 9,570 (660) 9570 (660)
1/2” 1/2” 5,200 (350) 7,500 (510) 7,970 (550) 7,970 (550)
5/8” 3/4” 6,090 (420) 6,090 (420)
3/4” 3/4” 6,090 (420) 6,090 (420) 6,090 (420) 6,090 (420)
INCOLOY®
Alloy
825
(ASTM B423)
1/4” 1/4” 6,400 (440) 9,130 (630) 9,130 (630) 9,130 (630)
3/8” 1/4” 4,100 (280) 5,900 (400) 8,200 (560) 9,130 (630)
3/8” 3/8” 4,100 (280) 5,900 (400) 8,200 (560) 8700 (600)
1/2” 1/2” 3,000 (200) 4,300 (290) 5,900 (400) 7,250 (500)
5/8” 3/4” 4,600 (310) 5,800 (400)
3/4” 3/4” 3,800 (260) 5,000 (340) 5,800 (400)
Super Duplex
(ASTM A789/
A789M)
1/4” 1/4” 10,000 (690) 10,000 (690)
3/8” 1/4” 6,400 (440) 9,300 (640) 10,000 (690) 10,000 (690)
3/8” 3/8” 6,400 (440) 9,300 (640) 9,570 (660) 9,570 (660)
1/2” 1/2” 4,700 (320) 6,800 (460) 7,970 (550) 7,970 (550)
5/8” 3/4” 6,090 (420) 6,090 (420) 6,090 (420)
3/4” 3/4” 6,090 (420) 6,090 (420)
Tube Material Tube
O.D.
Thread
Size
Wall Thickness - Maximum Tube Assembly Rating - PSI (bar)*
1 1.2 1.5 1.8 2 2.2 3.5 4 4.5
Stainless Steel
316
(ASTM A269)
6mm 1/4”
6,600 (450) 8,200 (560) 9,130 (630) 9,130 (630) 9,130 (630)
10mm 1/4”
3,800 (260) 4,600 (310) 5,900 (400) 7,300 (500) 8,300 (570) 9,130 (630)
10mm 3/8”
3,800 (260) 4,600 (310) 5,900 (400) 7,300 (500) 8,300 (570) 8,700 (600)
12mm 1/2”
3,100 (210) 3,800 (260) 4,800 (330) 5,900 (400) 6,700 (460) 7,250 (500)
16mm 3/4”
2,300 (150) 2,800 (190) 3,500 (240) 4,300 (290) 4,800 (330) 5,400 (370) 5,800 (400)
20mm 3/4”
2,800 (190) 3,400 (230) 3,800 (260) 4,200 (280) 5,800 (400) 5,800 (400)
25mm 1”
2,200 (150) 2,700 (180) 3,000 (200) 3,300 (220) 5,500 (370) 5,800 (400) 5,800 (400)
INCONEL®
Alloy 625
(ASTM B444-06)
6mm 1/4”
10,000 (690) 10,000 (690) 10,000 (690)
10mm 1/4”
7,600 (520) 9,300 (640) 10,000 (690) 10,000 (690) 10,000 (690)
10mm 3/8”
7,600 (520) 9,300 (640) 9,570 (660) 9,570 (660) 9,570 (660)
12mm 1/2”
6,300 (430) 7,600 (520) 7,970 (550) 7,970 (550) 7,970 (550)
16mm 3/4”
6,090 (420) 6,090 (420) 6,090 (420)
20mm 3/4”
5,600 (380) 6,090 (420) 6,090 (420) 6,090 (420) 6,090 (420)
INCOLOY®
Alloy 825
(ASTM B423)
6mm 1/4”
7,700 (530) 9,130 (630) 9,130 (630) 9,130 (630) 9,130 (630)
10mm 1/4”
4,400 (300) 5,400 (370) 6,900 (470) 8,500 (580) 6,900 (660)
10mm 3/8”
3,600 (240) 4,400 (300) 5,600 (380) 6,900 (470) 7,800 (530)
12mm 1/2”
3,600 (240) 4,400 (300) 5,600 (380) 6,900 (470) 7,250 (500)
16mm 3/4”
4,100 (280) 5,000 (340) 5,700 (390)
20mm 3/4”
3,200 (220) 3,900 (260) 4,400 (300) 4,900 (330)
Super Duplex
(ASTM A789/
A789M)
6mm 1/4”
10,000 (690)
10mm 1/4”
6,900 (470) 8,400 (570) 10,000 (690)
10mm 3/8”
6,900 (470) 8,400 (570) 9,570 (660) 9,570 (660) 9,570 (660)
12mm 1/2”
5,700 (390) 6,900 (470) 7,970 (550) 7,970 (550) 7,970 (550)
16mm 3/4”
6,090 (420) 6,090 (420) 6,090 (420) 6,090 (420)
20mm 3/4”
6,090 (420) 6,090 (420)
Table 3 - Pressure Rating for BSPP and NPT Termination Connectors (Imperial)*
ØE
D
C
A
B
F A/F G A/F
Tube
O.D. Bore Thread
(Female) ØE Tube
O.D. Bore
Tooling
Tri-Tool®
* The working pressure ratings for tubing in tables 1 to 4
are calculated directly from ASME B31.3