TE Corporation
300 Constitution Drive
Menlo Park, CA 94025 USA
Raychem
Specification
This Issue:
Date:
Replaces:
RT-555
Issue 7
29-Apr-14
Issue 6
Raychem RT-555 TUBING
Modified Fluoropolymer, Radiation Crosslinked,
Flexible, Abrasion Resistant, Flame Retardant, Heat Shrinkable
1.
SCOPE
This specification covers the requirements for one type of flexible, electrical insulating extruded tubing
whose diameter will reduce to a predetermined size upon the application of heat in excess of 220ºC
(428ºF).
The tubing is suitable for use in wire harness systems requiring high fluid resistance.
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-PRF-372
Cleaning Compound, Solvent
SAE-AMS1424
Fluid, Deicing/Anti-Icing, Aircraft, SAE Type 1
MIL-PRF-2104
Lubricating Oil, Internal Combustion Engine, Combat/Tactical Service
MIL-PRF-23699
Lubricating Oil, Aircraft Turbine Engine, Synthetic Base
MIL-PRF-46167
Lubricating
Oil, Internal Combustion Engine, Arctic
MIL-PRF-46170
Hydraulic Fluid, Rust Inhibited, Fire-resistance, Synthetic Hydrocarbon Base
MIL-PRF-5606
Hydraulic Fluid, Petroleum Base, Aircraft; Missile and Ordinance
MIL-PRF-2104
Lubricating Oil, Internal Combustion Engine, Combat/Tactical Service
MIL-PRF-7808
Lubricating Oil, Aircraft Turbine Engine, Synthetic Base
MIL-DTL-83133
Turbine Fuels, Aviation Kerosene Types, Nato F-34(JP-8), Nato F-35, JP-8 + 100
Federal
A-A-52557
A-A-59133
Fuel Oil, Diesel for Posts, Camps and Stations
Cleaning Compound, High Pressure (Steam) Cleaner (formerly P-C-437)
Ordnance Drawings
10873919
Electrolyte
2.2
OTHER PUBLICATIONS
American Society for Testing and Materials (ASTM)
ASTM D 412 Standard Test Methods for Vulcanized Rubber & Thermoplastic Elastomers
ASTM D 792
Specific Gravity & Density of Plastics by Displacement, Tests for
ASTM D 910
Standard Specification for Aviation Gasoline
ASTM D 2671 Standard Methods of Testing Heat-Shrinkable Tubing for Electrical Use
ASTM D 4814 Standard Specification for Automotive Spark-Ignition Fuel
ASTM G 21
Standard 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.)
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© 2014 Tyco Electronics Corporation. All rights reserved
Page 2
SPECIFICATION RT-555 ISSUE 7
International Organization for Standardization (ISO)
ISO 846
Plastics – Evaluation of the action of Microorganisms
(Copies of ISO publications may be obtained from the International Organization for Standardization, 1, rue
de Varembé, CH-1211 Geneva 20, Switzerland or via the ISO website at
http://www.iso.ch/iso/en/ISOOnline.frontpage
NASA
SP-R-0022
General Specification, Vacuum Stability Requirements of Polymeric Material
for Spacecraft Applications
3.
3.1
REQUIREMENTS
MATERIAL
The product shall consist of a heat shrinkable, crosslinked, thermally stabilized, flame-retardant modified
fluoropolymer material. The product shall be homogeneous and essentially free from flaws, defects, pinholes,
bubbles, cracks and inclusions.
3.2
COLOR
The tubing shall be black unless otherwise specified.
3.3
PROPERTIES
The tubing shall meet the requirements of Tables 1 and 3.
4.
4.1
4.1.1
QUALITY ASSURANCE PROVISIONS
CLASSIFICATION OF TESTS
Qualification Tests
Qualification tests are those performed on product 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 product submitted for acceptance under contract. Acceptance tests
shall consist of the following:
Visual
Dimensions
Longitudinal Change
Tensile Strength
Ultimate Elongation
Heat Shock
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SPECIFICATION RT-555 ISSUE 7
Page 3
4.2
4.2.1
SAMPLING INSTRUCTIONS
Qualification Test Samples
Qualification test samples shall consist of 50 feet
(15 m)
of tubing of the size specified. Qualification of any
size within each size range specified below will qualify all sizes in the same range.
Size Ranges
1/16 through 3/4
1” through 2”
4.2.2
Acceptance Test Samples
Acceptance test samples shall consist of not less than 16 feet
(5 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.
4.2
TEST PROCEDURES
Unless otherwise specified, tests shall be performed on specimens which have been fully recovered by
conditioning in accordance with 4.3.1. Prior to all testing, the test specimens (and measurement gauges,
when applicable) shall be conditioned for 3 hours at 23 ± 3ºC
(73 ± 5ºF)
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.
4.3.1
Dimensions, Dimensional Recovery, Longitudinal Change and Concentricity
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. Recover these specimens fully by conditioning for 3 minutes in
a 250 ± 5ºC
(482± 9ºF)
oven. Remove the specimens from the oven, allow to cool to 23 ± 3ºC
(73 ± 5ºF)
and
re-measure. Calculate longitudinal change as follows:
LC =
Where:
LC
L0
L1
=
=
=
L1 - L0
L0 X 100
Longitudinal Change [Percent]
Length Before Conditioning [Inches
(mm)]
Length After Conditioning (Inches
(mm)]
Measure the wall thickness of three 6-inch
(150-mm)
long specimens, as supplied, in accordance with ASTM
D 2671. Calculate concentricity as follows:
M1
C = M X 100
2
Where:
C
=
M1 =
M2 =
Concentricity [Percent]
Minimum Thickness [Inches
(mm)]
Maximum Thickness [Inches
(mm)]
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Page 4
SPECIFICATION RT-555 ISSUE 7
4.3.2
Tensile Strength and Ultimate Elongation
Test three specimens of tubing for tensile strength and ultimate elongation in accordance with ASTM D 2671.
For tubing sizes 3/8 and smaller, use full sections of tubing. For sizes 1/2 and larger, cut the specimens with
Die D, ASTM D 412. Apply 1-inch
(25-mm)
centrally located benchmarks to the specimens. Use an initial
machine jaw separation of 1 inch
(25 mm)
for full sections of tubing and 2 inches
(51 mm)
for die cut
specimens. Test at a rate of jaw separation of 2.0 ± 0.2 inches
(50 ± 5 mm)
per minute.
4.3.3
Low Temperature Flexibility
Condition three specimens, each 12 inches
(300 mm)
in length, and a mandrel selected in accordance with
Table 2, at -65 ± 3ºC
(-85 ± 5ºF)
for 4 hours. For tubing sizes 3/4 or less, use whole sections of tubing
recovered on a stranded wire (nearest AWG which is larger than the tubing maximum inside diameter after
unrestricted shrinkage). For tubing sizes larger than 3/4, use 1/4-inch
(6.3-mm)
wide strips cut from tubing
which has been recovered in accordance with 4.3.1. After 4 hours conditioning, and while still at the
conditioning temperature, wrap the specimens consisting of whole sections of tubing around the mandrel for
not less than 180 degrees in 10 ± 2 seconds. Wrap strip specimens around the mandrel for not less than 360
degrees in 10 ± 2 seconds. Examine the specimens visually for evidence of cracking.
4.3.4
Heat Shock
Condition three 6-inch
(150-mm)
specimens of tubing for 4 hours in a 300 ± 5ºC
(572 ± 9ºF)
oven. Remove
the specimens from the oven, cool to 23 ± 3ºC
(73 ± 5ºF),
wrap 360 degrees around a mandrel selected in
accordance with Table 2 and then visually examine for evidence of dripping, flowing or cracking. Any side
cracking caused by flattening of the specimen on the mandrel shall not constitute failure.
4.3.5
Heat Resistance
Condition three 6-inch
(150-mm)
specimens prepared in accordance with 4.3.2 for 336 hours in a 250 ± 3ºC
(482 ± 5ºF)
oven. After conditioning, the specimens shall be removed from the oven, cooled to 23 ± 3ºC
(73
± 5ºF)
and tested for tensile strength and ultimate elongation in accordance with 4.3.2.
4.3.6
Copper Stability
Slide three 6-inch
(150-mm)
specimens of tubing over a snug-fitting, straight, clean, bare solid or tubular
copper conductor. Condition the specimens on the conductors for 24 hours in an appropriate humidity
chamber at 90 to 95 percent relative humidity and 23 ± 3ºC
(73 ± 5ºF),
followed by 16 hours in a 200 ± 3ºC
(392 ± 5ºF)
oven. After conditioning, remove the specimens from the oven and cool to 23 ± 3ºC
(73 ± 5ºF).
Remove the copper conductor from the tubing and examine the tubing and conductor. Darkening of the
copper due to normal air oxidation shall not be cause for rejection. Test the tubing for ultimate elongation in
accordance with 4.3.2.
4.3.7
Corrosive Effect
Test the tubing for copper mirror corrosion in accordance with ASTM D 2671, Procedure A, for 16 hours at
200 ± 3ºC
(392 ± 5ºF).
Use specimens of 1/4 x 1 inch
(6 x 25 mm)
strips cut longitudinally from the tubing.
Evidence of corrosion shall be the removal of copper from the mirror, leaving an area of transparency greater
than 8 percent of its total area.
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SPECIFICATION RT-555 ISSUE 7
Page 5
4.3.8
Fluid Resistance
Immerse three 6-inch
(150-mm)
specimens of tubing, prepared and measured in accordance with 4.3.2,
completely in each listed fluid for the time and temperature specified in Table 3. Use a volume of fluid not
less than 20 times that of the specimens. After immersion, lightly wipe the specimens and air-dry for 30 to 60
minutes at room temperature. Test the specimens from each fluid for tensile strength and ultimate elongation
in accordance with 4.3.2.
4.3.9
Flammability After Fluid Exposure
Flammability tests shall be performed in accordance with ASTM D 2671 Procedure C on a
22-inch
(559-mm)
length of the tubing that has been fully immersed for 24 hours with ends open in fluids
specified in Table 3. The outside of the tubing shall be wiped to remove excess fluid and mounted in the
apparatus. The inside of the tubing shall be allowed to drain for 5 minutes before flame is applied.
4.4
REJECTION AND RETEST
Failure of any sample to conform to any one of the requirements of the specification shall be cause for
rejection of the lot represented. Product 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.
5.1
PREPARATION FOR DELIVERY
PACKAGING
Packaging shall be in accordance with good commercial practice.
5.2
MARKING
Each container of product shall be permanently and legibly marked with the manufacturer's part number, size,
quantity, manufacturer's identification, lot number and date of manufacture.
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© 2014 Tyco Electronics Corporation. All rights reserved
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