Double ferrule tube fitting

Double Ferrule Tube Fitting

Flowsys manufactures double ferrule compression tube fittings for instrumentation & fluid transmission system to provide torque free & leak proof joints at all tubing connection & hence prevents costly and hazardous leaks in process & instrumentation tubing. Flowsys double ferrule tube fittings consist of four precision engineered components called the body, nut, front ferrule & back ferrule, all manufactured to very stringent tolerances under rigid quality control procedures. When installed affixed to tubing becomes a five-piece connection provide a solid leak proof joint by the sequential action of twin ferrule which is a combination of geometry & metallurgy.

Flowsys double ferrule tube fittings are easy to install & does not require any special tools. These fittings are used several times with no damage on tube and fittings. We summarize some of the silent feature below.

PErformance

Design

Torque free design because of axial movement rather than rotary movement.
Self-Aligning
Vibration Resistance.
Thermal Compatibility & Corrosion Resistance.
Resistance to temperature cycle.
Unique combination of Geometry and Metallurgy.

Tubing Selection

For better performance of Flowsys Fittings, the tubing should be reasonably round, free from scratches & draw lines, good surface finish & the ends should be free from burrs. The tubing should be compatible to process fluid, temperature & pressure. Fully annealed seamless tubing in accordance with ASTM A213 & ASTM A269 or equivalent with preferred hardness of 75-80 HRB are best suitable for use with Flowsys Tube Fittings.

Product Range & Technical Specification

Size	Fraction	1/8" Tube OD to 1.1/2" Tube OD
	Metric	3mm Tube OD to 38mm Tube OD
Pressure	4000 psi to 10000 psi depends upon size (Please reffer size chart)
Temprature	Upto 648 Degree Celsius
End Connection	Available with NPT, BSPT, BSPP, SAE Pipe Threads or any other type upon request
Material	SS316/SS304	Inline	ASTM A276 / ASTM A479
		Forging	ASTM A182
	Carbon Steel	Inline	ASTM A108
		Forging	ASTM A105 / ASTM A106
	Also available in Brass, Monel, & Special Alloy in

Fractional Seamless Stainless Steel Tubing

OD in.	Wall Thickness (in.)
OD in.	0.012	0.014	0.016	0.02	0.028	0.035	0.049	0.065	0.083	0.095	0.109	0.12	0.134	0.156	0.188
1/16	6800	8100	9400	12000
1/8					8500	10900
3/16					5400	7000	10200
1/4					4000	5100	7500	10200			Working Pressure in psig
5/16						4000	5800	8000
3/8						3300	4800	6500	8600
1/2						2400	3500	4700	6200
5/8							2900	4000	5200	6000
3/4							2400	3300	4200	4900	5800
7/8							2000	2800	3600	4200	4800
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

Matric Seamless Stainless Steel Tubing

OD MM	Wall Thickness (mm)
OD MM	0.8	1.0	1.2	1.5	1.8	2.0	2.2	2.5	2.8	3.0	3.5	4.0	4.5
3	710
6	330	420	520	670
8		310	380	490
10		240	300	380
12		200	240	310	380	430			Working Pressure In bar
14		180	220	280	340	390	430
15		170	200	260	320	360	400
16			190	240	300	330	370
18			170	210	260	290	320	370
20			150	190	230	260	290	330	380
22			130	170	210	230	260	300	340
25					180	200	230	260	300	320
28						180	200	230	260	280	330
30						170	190	210	240	260	310
32						160	170	200	230	240	290	330
38							140	170	190	200	240	280	310
50										150	180	210	240

Weld Stainless Steel Tubing Allowable Working Pressure

To determine the working pressure of weld tubing to the requirements of ASME B31.3 Code, De-rating factors below must be applied.

For single weld tubing multiply by 0.80 & for double weld tubing multiply by 0.85.

Example: SS316 seamless 1/2″ O.D. x 0.065″ WT allowable working pressure: 4700 psi.
To determine the work pressure of the single weld tubing, multiply 4700 psi by 0.80. 4700 psig x 0.80=3760 psig at -20°F to 100°F (-28°C to 37°C)