Double Flaring

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What Are Double Lap Flares?

Double-lap flares provide added-strength joints which are more resistant to fatigue and provide a better seal than single-thickness flares.

Double Flaring Done Right

Double-lap flares formed by PHI machinery and tooling are free of cracks and pit marks. The joint is also designed so that the inside surface of the flare has a larger diameter than the inside diameter of the tube or pipe. As a result, the double lap flares will not interfere with flow characteristics of the system.

Typical Applications of Double Flaring

The typical applications of double flaring include thin-wall tubing connections that are subject to shock, vibration or high internal pressures such as automobile brake lines and critical aircraft hydraulic lines.

 

Double Flaring

 

 

Standard MS33583 Dimensions for 37 Degree Double-Flared Tubing

Tube Size
Nominal OD
(Inches)
A +.000
    -.010
(Inches)
B ±.010
RAD
(Inches)
Wall
Thickness
(Inches)
Min. ID

(Inches)
1/8
.200
.032
    
3/16
.302
.032
.028
.035
.114
.100
1/4
.359
.032
.028
.035
.178
.159
5/16
.421
.032
.035
.049
.224
.198
3/8
.484
.046
.028
.035
.049
.310
.288
.261

 

 

 

 

 

 

 

 

 

 

 

 

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Standard Dimensions for 45 Degree Double-Flared Tubing

Nominal T-OD
(Inches)
A-Dia. ±.005
(Inches)
1/8
.187
3/16
.275
1/4
.355
5/16
.420
3/8
.495
7/16
.565
1/2
.635
 
 
 
 

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