SFR-3/4-0-SP-CS6336

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Tyco Electronics Corporation
300 Constitutional Drive
Menlo Park, CA 94025 USA
Specification
This Issue:
Date:
Replaces:
RT-1140
Issue 6
August 20, 2014
Issue 5
THERMOFIT
®
SFR TUBING
Modified Silicone Elastomer, Flame-Retarded, Heat-Shrinkable
1. SCOPE
This specification covers the requirements for a type of highly flexible, electrically insulating, extruded
tubing whose diameter will reduce to a predetermined size upon the application of heat in excess of 175°C
(347°F).
2. APPLICABLE DOCUMENTS
This specification takes precedence over documents referenced herein. Unless otherwise specified, the latest
issue of referenced documents applies. The following documents form a part of this specification to the
extent specified herein.
2.1 GOVERNMENT-FURNISHED DOCUMENTS
Military
MIL-H-5606 Hydraulic Fluid, Petroleum Base, Aircraft, Missile and Ordnance
MIL-G-5572 Gasoline, Aviation, Grades 80/87, 100/130 and 115/145
MIL-L-7808 Lubricating Oil, Aircraft Turbine Engine, Synthetic Base
MIL-T-5624 Turbine Fuel, Aviation, Grades JP-4 and JP-5
2.2 OTHER PUBLICATIONS
American Society for Testing and Materials (ASTM)
D 412 Standard Method of Tension Testing of Vulcanized Rubber
D 2240 Standard Method of Test for Indentation Hardness of Rubber and Plastics by Means of a
Durometer
D 2671 Standard Methods of Testing Heat-Shrinkable Tubing
G 21 Recommended Practice for Determining Resistance of Synthetic Polymeric Materials to
Fungi
(Copies of ASTM publications may be obtained from the American Society for Testing and Materials, 1916
Race Street, Philadelphia, Pennsylvania 19103.)
3. REQUIREMENTS
3.1 MATERIAL
The tubing shall be fabricated from a stabilized, flame-retarded, modified silicone elastomer and shall be
crosslinked. It shall be homogeneous and essentially free from flaws, defects, pinholes, bubbles, seams,
cracks, and inclusions.
Page 2 SPECIFICATION RT-1140 ISSUE 6
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3.2 COLOR
Unless otherwise specified, the tubing shall be black.
3.3 PROPERTIES
The tubing shall meet the requirements of Table 3.
4. QUALITY ASSURANCE PROVISIONS
4.1 CLASSIFICATION OF TESTS
4.1.1 Qualification Tests
Qualification tests are those performed on tubing submitted for qualification as a satisfactory product and
shall consist of all tests listed in this specification.
4.1.2 Acceptance Tests
Acceptance tests are those performed on tubing submitted for acceptance under contract. Acceptance tests
shall consist of the following:
Dimensions
Longitudinal Change
Tensile Strength
Ultimate Elongation
Flammability
Heat Shock
4.2 SAMPLING INSTRUCTIONS
4.2.1 Qualification Test Samples
Qualification test samples shall consist of 50 feet (15 m) of tubing of each size. Qualification of any size
within each size range specified below will qualify all sizes in the same range.
Size Range
1/4 through 7/8
1 through 2
4.2.2 Acceptance Test Samples
Acceptance test samples shall consist of not less than 16 feet (6 m) of tubing selected at random from each
lot. A lot shall consist of all tubing of the same size, from the same production run, and offered for inspection
at the same time.
4.3 TEST PROCEDURES
Unless otherwise specified, perform the tests on specimens that have been recovered by conditioning for 10
minutes at 175 ± 3°C (347 ± 5°F). Prior to all testing, condition the test specimens (and measurement
gauges, when applicable) for 3 hours at 23 ± 3°C (73 ± 5°F) and 50 ± 5 percent relative humidity. All ovens
shall be of the mechanical-convection type in which air passes the specimens at a velocity of 100 to 200 feet
(30 to 60 m) per minute.
SPECIFICATION RT-1140 ISSUE 6 Page 3
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4.3.1 Dimensions and Longitudinal Change
Measure three 6-inch (150 mm) specimens of tubing, as supplied, for length ± 1/32 inch (± 1 mm), and inside
diameter in accordance with ASTM D 2671. Condition the specimens for 10 minutes in a 175 ± 5°C (347 ±
9°F) oven, cool to 23 ± 3°C (73 ± 5°F) and remeasure. Prior to and after conditioning, the dimensions of the
tubing shall be in accordance with Table 1 and the longitudinal change shall be in accordance with Table 3.
Calculate the longitudinal change as follows:
C =
L
1
- L
0
L
0
x 100
Where: C = Longitudinal Change [Percent]
L
0
= Length Before Conditioning [Inches (mm)]
L
1
= Length After Conditioning [Inches (mm)]
4.3.2 Tensile Strength, Tensile Stress and Ultimate Elongation
Test three specimens of tubing for tensile strength and ultimate elongation in accordance with ASTM D 2671,
and for tensile stress in accordance with ASTM D 412. For tubing sizes 3/8 and smaller, the specimens shall
be full sections of tubing; for sizes 1/2 and larger, the specimens shall be cut with die C of ASTM D 412.
The specimens shall have 1-inch (25-mm) bench marks, centrally located. The testing machine shall have an
initial jaw separation of 1 inch (25 mm) for full sections of tubing and 2 inches (50 mm) for die-cut
specimens. The rate of jaw separation shall be 20 ± 2 inches (500 ± 5 mm) per minute.
4.4 REJECTION AND RETEST
Failure of any sample of tubing to comply with any one of the requirements of this specification shall be
cause for rejection of the lot represented. Tubing which has been rejected may be replaced or reworked to
correct the defect and then resubmitted for acceptance. Before resubmitting, full particulars concerning the
rejection and the action taken to correct the defect shall be furnished to the inspector.
5. PREPARATION FOR DELIVERY
5.1 PACKAGING
Packaging shall be in accordance with good commercial practice. The shipping container shall be not less
than 125-pound-test fiberboard.
5.2 MARKING
Each container of tubing shall be permanently and legibly marked with the size, quantity, manufacturer's
name, part number, specification number, lot number, date of manufacture and expiration date.

SFR-3/4-0-SP-CS6336

Mfr. #:
Manufacturer:
Raychem / TE Connectivity
Description:
Heat Shrink Tubing and Sleeves SFR-3/4-0-SP-CS6336 PRICED PER FOOT
Lifecycle:
New from this manufacturer.
Delivery:
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Payment:
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