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All dimensions are in millimeters unless otherwise specified and only for reference subject to change.
To determine the allowable working pressure at a specific temperature, multiply the working pressure by the applicable factor
shown in table 3. Example: The working pressure of GNC-2N-S at 700
℉
. 10 000 psig x 0.82 = 8200 psig.
Table 2.
Material Standards and Temperature Range
Table 3.
Temperature De-rating Factors
Materials
Bar Stock
Forgings
MaximumTemperature
Stainless Steel 316 ASTM A276 Type 316 / ASTM A479 Type 316
ASTM A182 F316
537
℃
(1000
℉
)
Brass
JIS H3250 C3604 / ASTM B453 C35300
JIS H3250 C3771 / ASTM B283 C37700
204
℃
(400
℉
)
Carbon Steel
ASTM A108 / JIS G4051 S20C - S48C
ASTM A105 / JIS G4051 S20C - S48C
190
℃
(375
℉
)
Temp.
℉
100
200
300
400
500
600
700
800
900 1,000 1,200
℃
38
93
149
204
260
316
371
427
482
538
649
Factor
Stainless Steel
1.00
1.00
1.00
0.97
0.90
0.85
0.82
0.80
0.78
0.77
0.49
Brass
1.00
0.78
0.69
0.13
Carbon Steel
1.00
0.94
0.91
0.88
Table 4.
Temperature Ratings of O-ring, Gasket Materials
System temperature may be limited by the O-ring, Gasket material or thread sealant.
Component
Applicable Part #
Material
Temperature Ratings
O-ring
Designator : BN
NBR
-20 to 105
℃
(-4 to 221
℉
)
Designator : VT
FKM
-28 to 204
℃
(-18 to 400
℉
)
Designator : KZ
FFKM
-30 to 275
℃
(-22 to 527
℉
)
Copper Gasket
DGC-
Copper
-198 to 204
℃
(-324 to 400
℉
)
NBR bonded Gasket
DGB-
NBR bonded Carbon Steel Ring
-40 to 110
℃
(-40 to 230
℉
)
FKM bonded Gasket
DGV-
FKM bonded bonded Stainless Steel Ring
-28 to 204
℃
(-20 to 400
℉
)
Select the desired fitting basic part number, and add
a material designator below. Example: GL-2N-S
How to order
Material
SS 316 / 316L
Dual Grade Carbon Steel
Brass
Material
Designator
S
C
B
Table 5.
Pipe Thread Designator
Designator
Pipe
NPT
ASME
B1.20.1
ISOThread
Tapered
ISO 7-1
Parallel
ISO 228-1
2
1/8
2N
2R
2G
4
1/4
4N
4R
4G
6
3/8
6N
6R
6G
8
1/2
8N
8R
8G
12
3/4
12N
12R
12G
16
1
16N
16R
16G
Part
Number
P
NPT
in.
L
mm
E
mm
GNC- 2N
1/8
19.05
4.8
GNC- 4N
1/4
28.4
7.1
GNC- 6N
3/8
28.4
9.6
GNC- 8N
1/2
38.1
11.9
GNC-12N
3/4
38.1
15.7
GNC-16N
1
47.8
22.4
Part
Number
P
NPT
in.
L
mm
E
mm
H
Hex
mm
GNH- 2N
1/8
25.65
4.8
11.1
GNH- 4N
1/4
35.56
7.1
14.2
GNH- 6N
3/8
36.32
9.6
17.4
GNH- 8N
1/2
46.73
11.9
22.2
GNH-12N
3/4
46.73
15.7
26.9
GNH-16N
1
58.92
22.3
34.9
CLOSE NIPPLE
GNC
Male NPT both ends
HEX NIPPLE
GNH
Male NPT both ends