Steel Flange Components
Conformance
Materials
- Steel per SAE J518 with either black phosphate finish or plated zinc with yellow dichromate or
iridite dip. Stainless available on request.
Working Pressures
The following table lists the recommended working pressures for steel Four-bolt Solid and Split Flange
Fittings and Hose Ends made in accordance with SAE standard J518 and J517. Tompkins and SAE recommend
sufficient testing be conducted to assure that performance levels will be safe and satisfactory, especially
if installed in systems operating at elevated pressures or in severe conditions. When using Flanged Fittings
that have a threaded connection on one end, use the lower pressure rating of the two.
CAUTION: Although many Four-bolt Flanged Fittings have sufficient structural integrity to support the weight
of other components, Tompkins recommends consulting with our technical support department for guidance in
selection of parts for this purpose.
SAE J518 Four-Bolt Code 61 Flange Pressure Ratings
| Dash Size |
Flangehead 4 To 1 Minimum Size(Inches) |
OD/inches |
Burst PSI |
| -8 |
1 3/16 |
1.188 |
5000 |
| -12 |
1 1/2 |
1.500 |
5000 |
| -16 |
1 3/4 |
1.750 |
5000 |
| -20 |
2 |
2.000 |
4000 |
| -24 |
2 3/8 |
2.375 |
3000 |
| -32 |
2 13/16 |
2.812 |
3000 |
| -40 |
3 5/16 |
3.312 |
2500 |
| -48 |
4 |
4.000 |
2000 |
| -56 |
4 1/2 |
4.500 |
500 |
| -64 |
5 |
5.000 |
500 |
| -80 |
6 |
6.000 |
500 |
SAE J518 Four-Bolt Code 62 Flange Pressure Ratings
| Dash Size |
Flangehead 4 To 1 Minimum Size(Inches) |
OD/inches |
Burst PSI |
| -8 |
1 1/4 |
1.250 |
6000 |
| -12 |
1 5/8 |
1.625 |
6000 |
| -16 |
1 7/8 |
1.875 |
6000 |
| -20 |
2 1/8 |
2.125 |
6000 |
| -24 |
2 1/2 |
2.500 |
6000 |
| -32 |
3 1/8 |
3.125 |
6000 |
Torque Values
The minimum torque values provided by Tompkins Industries are to provide benchmarks that give optimum
results for leak free connections. Actual torque values should be based on individual applications.
Recommended Solid Four-Bolt Flange Assembly Instructions
- Step 1. Inspect port area to be smooth and free or nicks, burrs, scratches or contaminants.
- Step 2. Lubricate the O-ring and place in flange head groove.
- Step 3. Lubricate screw threads. Slip lock washers onto screws and insert screws into flange.
- Step 4. Position flange on port and finger tighten all screws.
- Step 5. Torque the screws in a figure-eight sequence incrementally until the appropriate torque
value in the following table is achieved.
Recommended Four-Bolt Split Flange Assembly Instructions
- Step 1. Follow steps 1 through 3 above, then proceed to the following steps.
- Step 2. Position both flange halves on port and turn one screw in each flange half about three turns.
- Step 3. Rotate each flange half away from port for sufficient clearance to position hose or fitting
flange head on port.
- Step 4. Close each flange half until it properly captures flange head. Insert remaining screws and
finger tighten.
- Step 5. Torque the screws in a figure-eight sequence incrementally until the appropriate torque value in the following table is achieved.
J518 Code 61 And Code 62flange Minimum Torque Values
| Dash Size |
Code 61 Port Size |
Code 62 Torque Foot/Lbs |
Torque Foot/Lbs |
| -8 |
1/2 |
15-19 |
15-19 |
| -12 |
3/4 |
20-29 |
25-33 |
| -16 |
1 |
27-35 |
41-50 |
| -20 |
1 1/4 |
35-46 |
62-75 |
| -24 |
1 1/2 |
46-58 |
116-133 |
| -32 |
2 |
53-67 |
200-217 |
| -40 |
2 1/2 |
79 |
NA |
| -48 |
3 |
137 |
NA |
| -56 |
3 1/2 |
116 |
NA |
| -64 |
4 |
116 |
NA |
| -80 |
5 |
116 |
NA |
Why Wet Torque?
Due to differences in plating types and thicknesses, materials and
thread quality of components, the coefficient of friction
can vary widely on any given assembly. Lubrication not only
produces a more consistent coefficient of friction, it increases
clamping force on sealing area with less torque on the threads.
Over-tightening causes threads to yield, deform and therefore lose the
ability to maintain an adequate load or clamping force on the
seating area. Extended operation and severe conditions cause
further yielding which promotes possibility of leaks. Improper
installation is the primary cause of leaks in hydraulic
connections.
Tompkins firmly recommends the application of the wet-torque method during installation. When you choose not to wet-torque, consistency and quality are compromised for the sake of convenience.
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