Tube Fittings: Stainless Steel
LOKRING’s stainless steel fittings are qualified to the requirements of the ANSI/ASME B31 pressure piping codes for pressure and fatigue design, and materials of construction. Extensive mechanical and environmental testing has demonstrated the sealing integrity of the LOKRING connection in a wide range of applications. LOKRING fittings are typically used where fire-safe conditions must be maintained.
NO WELDS, NO FLANGES
NO THREADS, NO LEAKS!
By eliminating welding, many overhead costs relating to safety, personnel, equipment and supplies, inspection rework, and monitoring can be eliminated or substantially reduced.
Some examples are:
- Obtain fire permit for hot work
- Erect scaffolding and provide ventilation
- “Sniff” area, gas free, and weather protect
- Blank flanges and nozzles
- Establish fire watch
- Build fire box or tarps
- Drain, flush, and dry lines
- Cranes, welders, grinders, and small tools
- Weld consumables (purge gas and filler rod)
- Workers’ compensation, insurance, and benefits
- Weld X-ray or other NDT
- Rework of damaged or misaligned spools
- System soak, flush, or passivation; HAZMAT disposal
- Maintain and monitor flanges for leakage
In addition, scarce ASME-certified welders are freed up for large bore pipe or pressure vessel welding.
Stainless Steel Tube Fittings
| Lokring Stainless Steel Tube Fitting | Tube O.D. (Measured in inches) | Available Sizes (Defined 1/16”) | Tube Wall Thickness Measure In (Inches) | ||||||
|
0.035 |
0.049 |
0.065 |
0.083 |
0.095 |
0.109 |
0.120 |
|||
| SS
Tube Product |
1/4 |
T04 |
5100 |
7500 |
9050¹ |
||||
|
3/8 |
T06 |
3300 |
4800 |
5650¹ |
|||||
|
1/2 |
T08 |
2600 |
3700 |
4270¹ |
² |
||||
|
5/8 |
T10 |
2100 |
2900 |
3750¹ |
² |
||||
|
3/4 |
T12 |
1700 |
2400 |
4200 |
4200 |
² |
|||
|
7/8 |
T14 |
² |
2800 |
² |
² |
² |
|||
|
1” |
T16 |
2400 |
3100 |
² |
² |
||||
|
1-1/4” |
T20 |
1900 |
2400 |
2800 |
3300 |
² |
|||
|
1-1/2” |
T24 |
1600 |
2000 |
2300 |
2700 |
3000 |
|||
|
2” |
T32 |
1100 |
1500 |
² |
² |
² |
|||
|
2-1/2” |
T40 |
900 |
1200 |
² |
² |
² |
|||
| ¹ – Lokring de-rates the Max Allowable Tube Pressure ² – Consult LOKRING for details
|
| Temperature De-rating Table for Lokring SS Tube Fittings | |
|
Temperature Degrees |
Temperature |
|
200° |
1.00 |
|
300° |
1.00 |
|
400° |
0.97 |
|
500° |
0.90 |
|
600° |
0.85 |
|
650° |
0.84 |
|
700° |
0.82 |
|
750° |
0.81 |
NOTES:
| 1. | On indicated wall thicknesses at ambient temperature. See specification FS40-T for details. |
| 2. | See LOKRING’s “Corrosive Service Guidelines” for specific service details. |
| 3. | See “LOKRING Fitting Applications Guide” for more details. |
| 4. | Fitting material 316L Stainless Steel as per ASTM A276 or ASTM 479. |
MATCHING TUBE:
| Stainless Steel: For use on: |
|
| 316/316L stainless steel tube to ASTM A269 or ASTM A213 | |
| 304/304L stainless steel tube to ASTM A269 or ASTM A213 | |
|
Fitting Size (PXX) |
Insertion Depth |
Insertion Depth |
Outside |
Inside Diameter |
Minimum Straight Run |
|
1/4”(T04) |
0.88” |
0.73” |
0.54” |
0.257” |
1.25” |
|
3/8” (T06) |
1.26” |
0.92” |
0.72” |
0.382” |
1.63” |
|
1/2” (T08) |
1.34” |
1.00” |
0.87” |
0.507” |
1.63” |
|
5/8” (T10) |
1.53” |
1.12” |
1.05” |
0.632” |
2.00” |
|
3/4″ (T12) |
1.56” |
1.17” |
1.17” |
0.757” |
2.00” |
| 7/8″ (T14) | 1.50″ | 1.13″ | 1.20″ | 0.882″ | 2.00″ |
| 1″ (T16) | 1.59″ | 1.21″ | 1.38″ | 1.007″ | 2.00″ |
| 1 1/4″ (T20) | 2.04″ | 1.51″ | 1.81″ | 1.257″ | 2.50″ |
| 1 1/2″ (T24) | 2.12″ | 1.58″ | 2.11″ | 1.507″ | 2.75″ |
| 2″ (T32) | 2.65″ | 1.97″ | 2.56″ | 2.007″ | 3.25″ |
| 2 1/2″ (T40) | 3.27″ | 2.46″ | 3.10″ | 2.507″ | 4.61″ |
1. All dimensions are in inches.
2. Dimensions A, B, C, D, & E are applicable to other fittings of the same size.
3. For use on 316, 316L, 304 and 304L seamless and welded stainless steel tube as per ASTM A269 or A213. See table for qualified wall thickness.
4. Coupling “thru-bore” design permits tube to pass completely through (except SS40-T04). All other fittings (tees, elbows, etc.) have an internal travel stop.
5. Material 316L Stainless Steel as per ASTM A276 or ASTM 479.
6. Fittings from T04-T12 & T32-T40 are SS40-Txx. Fittings from T14-T24 are SS-3000-Txx.
7.All dimensions are for reference only and subject to change.