Ham-Let SAE37FLARE General Product Line Information

3-PIECE TUBE ASSEMBLY

CONNECTORS

STAINLESS STEEL
HIGH PRESSURE 37°
TUBE FITTINGS
1/8’’ TO 2’’

MEETS SAE STANDARD J514

If necessary, see SAE Standard J514 for
a complete list of dimensions.
NPT Tapered Pipe Threads meet the
requirements of ASME/ANSI B.I.20.1.

CONNECTORS

All 37° Flared Tube Fittings 3-Piece
Tube Assembly can be used with
a metric tube by using a metric 37°
sleeve, instead of an inch sleeve.
Each dimension table shows which
metric sleeve should be used for
every size.

ASSEMBLY INSTRUCTIONS

1. Cut the tube to the proper length.

2. Slide the nut and sleeve onto the tube.

(see Fig.1).

3. With a special flaring tool, form the
flare to 37° dimension according to SAE
STD. J533. (see Fig.2 page 125).

4. Screw the nut onto the body until
finger tight.

5. From this position, tighten the nut with
a wrench 1/4” turn in order to make a
leakproof metal-to-metal connection.

TUBING DATA FOR 37°
FLARE THREE-PIECE TUBE
ASSEMBLY

In order to ensure maximum fitting
reliability and performance, please take
great care when selecting the tube for
each application.
Tubing should be fully annealed,
seamless and drawn, suitable for
bending and flaring, according to
standard ASTM-269,
A.I.S.I. 316 or 304.

QUALITY

Lengths of finished tubing should be
reasonably straight and have smooth
ends, free from burrs. Tubing should be
free from scale and injurious defects,
and it should have a workmanlike finish.
Surface imperfections such as handling
marks, die marks, or shallow pits will
not be considered injurious defects
provided the imperfections are within
the tolerances specified for diameter
and wall thickness. The removal of such
imperfections is not required. (Quality
SAE J524).

TUBE HANDLING

Scratches on the tube might cause leaks.
It is, therefore, important to handle the
tube carefully to reduce the risk of leaks.

1. Tubes must not be dragged on the
floor.

2. Tubes must not be dragged out of a
tubing rack, especially in cases
of large OD tubes.

TUBE CUTTING

Two different methods can be used to
cut tubes:

1. Tube cutter

2. Hacksaw

Tube Cutter

To attain a leakfree connection,
the tubing must be cut squarely.
A good quality tube cutter with an
appropriate blade for tubing material is
recommended.
Do not try to reduce the time of cutting
by taking deep cuts with each turn of
the cutter.
The end of the tube must be deburred to
avoid damage to the fitting and to ensure
that the tube reaches the bottom of the
fitting.

Hacksaw cutting

In order to cut the tube with a hacksaw
and to attain square ends, the tube must
be cut with guide blocks. This method
of cutting requires deburring of the tube
ends.

WARNING

Do not hold the tube in a vise in the place
where it will be inserted into the fitting.
The vise will leave a mark on the tube
that may cause leaks and might cause
ovality.

124

3-PIECE TUBE ASSEMBLY