Truly Tubular Fitting Corp General Information

PO Box 1160 Mount Vernon, NY 10550
914-664-8686 Fax:914-668-2617

TECHNICAL DATA

BRAZETYTE® fittings are produced to mate with tube OD sizes.
Varying tube wall thicknesses may be used depending upon
design parameters. Selection of the wall thickness used for fluid
systems will generally be governed by pressure, flow and/or
velocity considerations. Thin wall stainless steel tubing in OD
sizes provide increased flow with high strength.

CUP
DESIGN
DATA

DASH NO.	TUBE OD	TUBE WALL	A ID	B CUP DEPTH
-4	1/4	.025	.254	1/4
-5	5/16	.025	.316	1/4
-6	3/8	.028	.379	1/4
-8	1/2	.032	.504	5/16
-10	5/8	.035	.629	7/16
-12	3/4	.042	.754	1/2
-16	1	.049	1.005	3/4
-20	1-1/4	.049	1.255	13/16
-24	1-1/2	.049	1.505	15/16

THEORETICAL BURST PRESSURE TABLE

TUBE
OD TUBE
WALL .020 .025 .028 .032 .035 .042 .049 .065

1/4 13,600 17,000 19,125 21,250 23,375 28,475 33,360 44,625

5/16 10,860 13,575 15,300 17,380 19,125 22,810 26,775 35,300

3/8 8,925 11,475 12,750 14,450 17,000 19,125 22,310 29,750

1/2 6,800 8,500 9,350 11,050 12,750 14,450 16,575 22,100

5/8 5,525 6,800 7,650 8,925 9,560 11,475 13,600 17,850

3/4 4,460 5,740 6,375 7,225 8,285 9,560 11,050 14,875

1 3,400 4,250 4,675 5,525 5,950 7,225 8,500 11,050

1-1/4 NA 3,400 3,825 4,460 4,675 5,735 6,800 8,925

1-1/2 NA 2,760 3,185 3,610 4,035 4,675 5,525 7,435

The above theoretical burst pressures for stainless steel are based on an utlimate tensile
strength of 85,000 psi, using Barlow's formula: P=2ST/D
where P= pressure in psi
S=fiber stress in psi
T=wall thickness in inches
D=outside diameter in inches
To obtain the minimum internal pressure which would cause permanent deformation
of stainless steel tubing having a yield strength of 35,000 psi, multiply the figures in the
table by .412.

HOW TO SELECT THE PROPER TUBING

TO FIND THE REQUIRED TUBE l.D.
FLOW-20 GPM * VELOCITY-6 Ft./sec.
Follow horizontal FLOW line (20 GPM)
to the right until it intersects vertical
VELOCITY line (6 ft./sec). Project
this point along the blue diagonal line
to arrive at the re-quired tube l.D. (1.152).

TO FIND FLOW (GPM), WITH
VELOCITY AND TUBE SIZE
PARAMETERS ESTABLISHED
VELOCITY-20 Ft./Sec.*TUBE l.D.-319
First follow vertical VELOCITY
line (20 ft./sec) up until it intersects
the blue di-agonal line representing
(.319) tube l.D. Project this point to
the left, horizontally to read the
permissible flow-(5.0 GPM).

TO FIND VELOCITY
FLOW-2 GPM * TUBE l.D.-.319
Extend horizontal FLOW line
(2 GPM) to the right until it intersects
blue diagonal line of (.319) TUBE l.D.
Project from this point downward
vertically to find VELOCITY-(8 ft./sec).

TUBE OD	TUBE ID	WALL
1/4"	.210 .200 .186 .180	.020 .025 .032 .035
5/16"	.272 .262 .242	.020 .025 .035
3/8"	.335 .319 .305 .277	.020 .028 .035 .049
1/2"	.460 .444 .436 .430 .402	.020 .028 .032 .035 .049
5/8"	.555 .527 .495	.035 .049 .065
3/4"	.680 .666 .652 .620	.035 .042 .049 .065
1"	.930 .902 .870	.035 .049 .065
1-1/4"	1.180 1.152 1.120	.035 .049 .065
1-1/2"	1.430 1.402 1.370	.035 .049 .065

FLOW/VELOCITY CHART

The above chart lists tubing normally available as stock sizes. The bold face sizes are those from
which standard BRAZETYTE fittings are fabricated. For special ID's and wall thicknesses consult
your tubing supply source.

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TUBE OD	TUBE WALL .020	.025	.028	.032	.035	.042	.049	.065
1/4	13,600	17,000	19,125	21,250	23,375	28,475	33,360	44,625
5/16	10,860	13,575	15,300	17,380	19,125	22,810	26,775	35,300
3/8	8,925	11,475	12,750	14,450	17,000	19,125	22,310	29,750
1/2	6,800	8,500	9,350	11,050	12,750	14,450	16,575	22,100
5/8	5,525	6,800	7,650	8,925	9,560	11,475	13,600	17,850
3/4	4,460	5,740	6,375	7,225	8,285	9,560	11,050	14,875
1	3,400	4,250	4,675	5,525	5,950	7,225	8,500	11,050
1-1/4	NA	3,400	3,825	4,460	4,675	5,735	6,800	8,925
1-1/2	NA	2,760	3,185	3,610	4,035	4,675	5,525	7,435