UNILOK® Weld & Metal Face Seal (UCR) fittings are designed and manufactured as high performance and high purity components
by our own know-how to be accumulated throughout the years.
UNILOK® guarantees high quality butt welding between tube and fittings as well as leak free assembly for critical applications.
| Designator | Surface Finish(μm) | |
| Average | Maximum | |
| BA | < 0.4 | < 1.6 |
| EP | < 0.125 | < 1.6 |
Reference Specification : SEMA-90120400B
SEM, ESCA/XPS, AES analysis for all electro polished
products are used to measure surface cleanliness
and anticorrosion requirements in accordance with
SEMA specifications.
SEM – SEMA 90120401B-STD
ESCA/XPS – SEMA 90120403B-STD
AES – SEMA 91060573B-STD
| Grade | ASTM | UNS | ASME |
|---|---|---|---|
| 304 | A213/A269 TP304 | S30400/S30403 | SA213 |
| 304L | A213/A269 TP304L | ||
| 316 | A213/A269 TP316 | S31600/S31603 | SA213 |
| 316L | A213/A269 TP316L |
| Grade | AP | BA | EP |
|---|---|---|---|
| Inside Surface Roughness |
Ry ≤ 25 μm | Ry ≤ 3.0 μm | Ry ≤ 0.5 μm |
Female nuts are silver plated for easy of assembly, consistent make-up, prevention of galling and reduction of the torque required for fitting assembling.
UNILOK fittings are rated to a helium leak rate of less than
1×10-9 mbar.l/sec and tested in accordance with SEMA-90120391B-STD and
SEMI F1-96.
According to ASTM F1394-92
According to SEMA-90120397B-STD
| Tube O.D. | Wall Thickness | Pressure Rating | |
| psig | bar | ||
| 1/4" | 1.00mm | 5200 | 359 |
| 0.89mm | |||
| 3/8" | 1.00mm | 3350 | 231 |
| 0.89mm | |||
| 1/2" | 1.24mm | 3750 | 259 |
| 3/4" | 1.65mm | 3350 | 231 |
| 1" | 1.65mm | 2400 | 265 |
0.89mm(0.035″) wall thick fittings are available upon request. When ordering,
be sure to add to the part number.
Pressure ratings are calculated in accordance with ANSI/ASME B31.3 for stainless steel pressure piping at room temperature.
According to SEMA-90120397B-STD
According to SEMI E49.6
Each component is double bagged to ensure component cleanliness and to protect them from environmental contamination. Referenced specification : SEMI E49.1.
UNILOK weld fittings are ordered by part number as shown below.
Example: The following part number, CLGS-0804-SM-EP is designated for Long Gland S, 1/2″UCR x 1/4″TBW”, Single Melting 316LSS, EP.
| Pipe Size Designation (NPT or ISO7/1(PT)) | |||||
|---|---|---|---|---|---|
| PIPE Size | 1/4 | 3/8 | 1/2 | 3/4 | 1 |
| Designator | 04N/R | 06N/R | 08N/R | 12N/R | 16N/R |
| UCR (Metal Face Seal) Size Designator | |||||
|---|---|---|---|---|---|
| PIPE Size | 1/4 | 1/2 | 3/4 | 1 | |
| Designator | 04 | 08 | 12 | 16 | |
| Connection Size & Type | Designation|||||||
| Fractional(Inch) Tube O.D. Designation | |||||||
| Tube O.D. |
Inch | 1/8 | 1/4 | 3/8 | 1/2 | 3/4 | 1 |
| mm | 3.17 | 6.35 | 9.52 | 12.70 | 19.05 | 25.40 | |
| Designator | 02 | 04 | 06 | 08 | 12 | 16 | |
| Surface Finish Level | |||||
|---|---|---|---|---|---|
| BA | BA - Bright Annealing | ||||
| EP | EP - Electro Polished | ||||
| Materials | |
|---|---|
| DM | 316LSS - Double Melting |
| SM | 316LSS - Single Melting |
| SL | 316LSS |
| NI | Nickel |
