Supplier of Fluid control products including instrumentation TUBE FITTINGS, PIPE FITTINGS and Valves

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Features

Gaugeability

UNILOK tube fittings are produced in accordance with the exact and tight tolerance. Without such close tolerance, the interaction of the nut, the ferrules and the body would not be interacted properly.

Corrosion

Resistance UNILOK ferrules have the strongest corrosion resistan-ce by our own special hardening process. It has been proved in various of industrial areas for some decades.

Interchangeability

UNILOK tube fittings can be interchanged with the tube fittings which are manufactured by the international standard.

Less Torque and Anti Distortion

When the nut is tightened, both ferrules are driven forward between the nut and the body. This axial movement doesn’t transfer any torque from the fitting to the tubing when original tubing’s mechanical properties are maintained.

Instrument Fittings Tube fittings UU-feature
UNILOK Tube Fittings Installation Instruction
UNILOK Tube Fittings Installation Instruction

1. Firmly insert the tubing until it bottoms in the fitting body.
2. Finger tighten the nut.
3. Mark the nut at the 6 o’clock position, with pencil or scribe.
4. Hold the body with a backup wrench, or vice, then tighten nut.
5. 1-1/4 turns to the 9 o’clock position.
6. The above applies to all fittings from 1/4″to 1″(6mm to 25mm).
7. Fittings from 1/16″to 3/16″(3mm to 4mm), only 3/4 turn is required.

Reassembly – Simply insert tube assembly into fitting body, tighten nut to
the original position as indicated by the previous mark, then snug up slightly with a wrench.

UNILOK Tube Fittings Installation Instruction

Materials

UNILOK fittings are available in various kinds of materials as below. Straight fittings are machined from cold finished bar stock and shaped fittings from forgings. For more details or special application, contact your local distributors.

Materials Bar Stock Forgings
316 SS or 316L SS ASTM A479
ASME SA479
ASTM A182
ASME SA182
Brass® ASTM B16
ASTM B453
ASTM B283
Alloy 400 (Monel®) ASTM B164 ASTM B564
ASME SB564
Alloy 600 (Inconel®) ASTM B166
Alloy 625 (Inconel®) ASTM B446
Alloy 825 (Inconel®) ASTM B425
Alloy C-276 (Hastelloy®) ASTM B574 ASTM B564
PTFE ASTM D1710 ASTM D3294
Duplex (SAF 2205®)
UNS S31803 / S32205
ASTM A479 ASTM A182
Super Duplex (SAF 2507®)
UNS S32750
ASTM A479
UNS 31254
(Incoloy 25-6MO®)
ASTM B649 -
Sour Environment Services

UNILOK tube fittings are comply with NACE MR-0175/ISO 15156 for sour oilfield application or NACE MR-0103 for petroleum refining operations.
To order, add – N to the end of part number.

Identification of Metric UNILOK Tube Fittings

Every UNILOK tube fittings with metric tube end have a stepped shoulder to distinguish the fittings with fractional tube end.

idenfication of Metric UNILOK Tube Fittings
Cleaning

UNILOK tube fittings are free from machine oils, loose particles and grease throughout the close cleaning process.
UNILOK tube fittings for oxygen enriched systems are available by the special cleaning procedure. To order, add OX to the part number.

Tubing Information

The proper selection of tubing is essential to assure maximum fitting reliability and performance. When choosing tubing material,
size and wall thickness, consider system’s pressure, flow rate, temperature, environment and compatibility with great care.

Maximum Allowable Working Pressure

Stainless Steel Tubing

Fully annealed and seamless stainless steel tubing to comply with ASTM A269 or equivalent. Hardness should not exceed Rb 80.
Tubing should be free from scratched and suitable for bending and flaring.

Factional(Inch) Tubing - Working Pressure in psig
Tube O.D
(Inch)
Tube Wall Thickness (Inch)
0.028 0.035 0.049 0.065 0.083 0.095 0.109 0.120 0.134 0.156 0.188
1/8 8550 10950
3/16 5500 7100 10300
1/4 4100 5200 7600 10300
5/16 4100 5900 8100
3/8 3350 4850 6550
1/2 2650 3750 5150 6750
5/8 2950 4050 5250 6050
3/4 2450 3350 4250 4950 5850
4/8 2050 2850 3650 4250 4850
1 2400 3100 3600 4200 4700
1-1/4 2400 2800 3300 3600 4100 4900
1-1/2 2300 2700 3000 3400 4000 4900
2 2000 2200 2500 2900 3600
Metric Tubing - Working Pressure in psig
Tube O.D
(mm)
Tube Wall Thickness (Inch)
0.8 1.0 1.2 1.5 2.0 2.2 2.5 3.0 3.5 4.0 4.5
3 9700
4 7900 11500
6 4500 6100 7850 10300
8 4500 5650 7500
10 3500 4350 5800 8400
12 2900 3600 4800 6800
14 2300 2900 4000 5500 6250
15 200 2750 3650 5200 5800
16 2450 3350 4800 5350 5800
18 2150 2950 4200 4650 5350 5800
20 2030 2600 3750 4200 4800
22 1750 2300 3350 3750 4350
25 2900 3350 3750 4650
38 2030 2300 2900 3500 3900 4500

For gas service application, use only tubing with wall thickness on outside of gray areas. Allowable stress of 20000 psig between
-29°C(-20°F) and 37°C(100°F) based on ultimate tensile strength to be 74000 psig.

Copper

Tubing Fully annealed and seamless stainless steel tubing to comply with ASTM B75 or equivalent. Hardness should not exceed Rb 60.

Factional(Inch) Tubing - Working Pressure is psig

For gas service application, use only tubing with wall thickness on outside of gray areas. Allowable stress of 6000 psig between
-29?(-20?) and 37? (100?) based on ultimate tensile strength to be 30000 psig.

Tube O.D
(Inch)
Tube Wall Thickness (Inch)
0.028 0.035 0.049 0.065 0.083 0.095 0.109 0.120
1/4 1300 1600 2500 3500
3/8 1000 1600 2200
1/2 800 1100 1600 2200
5/8 900 1200 1600 1900
3/4 700 1000 1300 1500 1800
1 500 700 900 1100 1300 1500
Metric Tubing - Working Pressure is psig
Tube O.D. Tube Wall Thickness (inch)
1.0 1.5 2.0 2.5 30
6 2350 3670
8 1710 2680
10 1350 2090
12 1100 1710 2350
20 990 1350 1710
25 780 1060 1350 1640

Monel Tubing

Fully annealed and seamless stainless steel tubing to comply with ASTM B165 or equivalent. Hardness should not exceed Rockwell Rb 75.

Factional(Inch) Tubing - Working Pressure in psig
Tube O.D
(Inch)
Tube Wall Thickness (Inch)
0.035 0.049 0.065 0.083 0.095 0.109 0.120
1/4 4800 7000 9500
3/8 3100 4400 6100
1/2 2300 3200 4400
5/8 2200 3000 4000 4600
3/4 2200 2900 3400 3900 4300

For gas service application, use only tubing with wall thickness on outside of gray areas. Allowable stress of 6000 psig between
-29?(-20?) and 37? (100?) based on ultimate tensile strength to be 30000 psig.

Determination Factors of MAWP at High Temperature Application
Temperature Materials
°C °F 316SS Copper Monel
90 194 1.00 0.80 0.88
200 392 0.96 0.50 0.79
310 590 0.85 - 0.79
480 802 0.79 - 0.75
536 996 0.76 - -
644 1227 0.37 - -

To determine allowable working pressure at elevated temperature,
multiply allowable working pressure and factors which are shown in the table.

Example: 316SS Tubing, 1/2″ODx0.049″WT at 310? AWP: 3750 x 0.85 = 3187 psig.

* MAWP: Maximum Allowable Working Pressure
* AWP: Allowable Working Pressure

Pipe End Thread Information

The end connections with the lower pressure rating is the determining factor of pressure rating for the fittings with both UNILOK tube ends and pipe thread ends .

Pressure Rating for Pipe End Thread

Tapered Pipe Threads – NPT or ISO 7/1(BSPT)

Allowable pressure ratings for male and female threads are based on ASME B31.3 at ambient temperature.

Pipe
Size
316SS 316SS UNILOK
Designator
Male Female Male Female
inch bar psig bar psig psig bar psig
1/16 760 11000 460 6700 5500 230 3300 -01N/R
1/8 690 10000 440 6500 5000 220 3200 -02N/R
1/4 550 8000 450 6600 4000 220 3300 -04N/R
3/8 540 7800 360 5300 3900 180 2600 -06N/R
1/2 530 7700 330 4900 3800 160 2400 -08N/R
3/4 500 7300 320 4600 3600 160 2300 -12N/R
1 370 5300 300 4400 2600 150 2200 -16N/R
1-1/4 410 6000 350 5000 3000 170 2500 -20N/R
1-1/2 340 5000 310 4600 2500 150 2300 -24N/R
2 270 3900 270 3900 1900 130 1900 -32N/R

ISO 228/1 Parallel Thread (BSPP)

The pressure ratings are at ambient temperature

Male
Pipe Size
316SS UNILOK
Designator
bar psig
1/8 315 4568 -02G
1/4 315 4568 -04G
3/8 315 4568 -06G
1/2 160 2320 -08G

O-Seal Fittings

Rated to 206 bar (3000 psig) for 316SS fittings up to 1 inch and 25mm

Kinds of Pipe End Thread

NPT Pipe Thread

NPT (National Pipe Thread) is based on ANSI B1.20.1

Kind of Pipe End Thread
Kind of Pipe End Thread

ISO 7/1 Tapered Pipe Thread

International Organization for Standard (ISO 7/1) Tapered (PT) Equivalent to BSPT (British Standard Pipe Taper Thread), DIN 2999, JIS B0203

Tapered Pipe Thread-NPT or ISO-BSPT-2
Tapered Pipe Thread-NPT or ISO-BSPT

ISO 228/1 Parallel Pipe Thread

International Organization for Standard (ISO 228/1) Parallel(PF) Equivalent to BSPP (British Standard Pipe Parallel Thread), DIN ISO228/1, JIS B0202 Gasket or O-ring is normally used to seal into the parallel female threaded components.

ISO 228-1 Parallel Pipe Thread
ISO 228-1 Parallel Pipe Thread

How To Order

UNILOK fractional(inch) size tube fittings are ordered by part number as shown below.

Example: The following part number, UMC-0804N-SS, is designated for Male Connector, 1/2″OD x 1/4″ Male NPT, 316SS.

UNILOK PTFE fittings are ordered by part number as shown below.

Example: The following part number, UMC-0404N-TF is designated for Male Connector, 1/4″O.D. x 1/4″ M-NPT, PTFE.

PTFE Fittings How to Order
Fractional (Inch) Tube Designation
Tube O.D. inch 1/16 1/8 3/16 1/4 5/16 3/8 1/2 5/8 3/4 7/8 1 1-1/8 1-1/4 1-1/2 2
mm 1.05 3.17 4.76 6.35 7.93 9.52 12.70 15.88 19.05 22.22 25.40 28.57 31.75 38.10 50.80
Designator 01 02 03 04 05 06 08 10 12 14 16 18 20 24 32
Pipe Size Designation
Pipe Size 1/8 1/4 3/8 1/2 3/4 1 1-1/4 1-1/2 2
Designator 02 04 06 08 12 16 20 24 32
Thread Type Designation
Designator Thread Tyep
N NPT National Standard Pipe Thread
R ISO 7/1 Taper Pipe Thread
G ISO 228/1 Parallel Pipe Thread
U SAE J1926 Straight Thread Boss
S SAE J514 37° Flared
T Tube End
None UNILOK Port
Material Designation
Designator Materials
SS 316S
BS Brass
CS Carbon Steel
MO Alloy 400
IN60 Alloy 600
IN65 Alloy 625
IN85 Alloy 825
HC Alloy C-276
TF PTFE
DP Duplex
SD Super Duplex
6MO 6MO/SMO254
Nace Application
None -
N Nace Application
Plating Designation
NP Nickel
BP Black Phosporized
Metric Tube Fittings

UNILOK metric size tube fittings are ordered by part number as shown below.

Example: The following part number, UMC-M1204R-SSS, is designated forMale Connector, 12mmOD x 1/4″ Male BSPT, 316SS.

Metric Tube Fittings How to Order
Metric Tube O.D. Designation
Tube O.D. mm 2 3 4 6 8 10 12 14 15 16 18 20 22 25 28 32 38
Designator M02 M03 M04 M06 M08 M10 M12 M14 M15 M16 M18 M20 M22 M25 M28 M32 M38

products fitting tubefitting UMC

Connects Fractional(Inch) Tube to Female NPT Thread

Connects Fractional Inch Tube to Female NPT Thread

Connects Metric Tube to Female ISO Tapered Thread

Connects Metric Tube to Female ISO Tapered Thread