RT-3-NO.3-0-1.25IN (5201946048) - Tyco Electronics

Tyco Electronics Corporation

300 Constitutional Drive

Menlo Park, CA 94025 USA

Specification

This Issue:

Date:

Replaces:

RT-360

Issue 8

May 21, 2003

Issue 7

THERMOFIT® CRN TUBING

Polyolefin, Semi-Rigid, Heat-Shrinkable

1. SCOPE

This specification covers the requirements for two types of semirigid electrical insulating, extruded tubing

whose diameter will reduce to a predetermined size upon the application of heat in excess of 135°C (275°F).

1.1 TYPE 1

Type 1 tubing shall be flame retarded and unless otherwise specified, shall be black.

1.2 TYPE 2

Type 2 tubing shall not be flame retarded and shall be clear.

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-G-5572 Gasoline, Aviation, Grades 80/87, 100/130, and 115/145

MIL-H-5606 Hydraulic Fluid, Petroleum Base, Aircraft, Missile and Ordnance

MIL-T-5624 Turbine Fuel, Aviation, Grades JP-4 and JP-5

2.2 OTHER PUBLICATIONS

American Society for Testing and Materials (ASTM)

D 2671 Standard Methods of Testing Heat-Shrinkable Tubing for Electrical Use

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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Page 2 SPECIFICATION RT-360 ISSUE 8

3. REQUIREMENTS

3.1 MATERIALS

The tubing shall be fabricated from thermally stabilized, modified polyolefin and shall be crosslinked by

irradiation. It shall be homogeneous and essentially free from flaws, defects, pinholes, bubbles, seams,

cracks, and inclusions.

3.2 PROPERTIES

The tubing shall meet the requirements of Table 3.

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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 be: dimensions, longitudinal change, tensile strength, ultimate elongation, secant modulus, flammability

(Type 1 only), and heat shock. Statistical process control data may be used to demonstrate conformance for

dimensions.

4.2 SAMPLING INSTRUCTIONS

4.2.1 Qualification Test Samples

Qualification test samples shall consist of 50 feet (15 m) of black, white and clear tubing. Qualification of

any size within each size range specified below shall qualify all sizes within that size range.

Range of Sizes

3/64 through 1/4

3/8 through 1/2

4.2.2 Acceptance Test Sample

Acceptance test samples shall consist of not less than 16 feet (5 m) of tubing selected at random from each

compound batch or the first sleeving production lot of the batch compound. Physical property tests

performed at this time qualify subsequent sleeving lots produced from the same compound batch.

SPECIFICATION RT-360 ISSUE 8 Page 3

4.3 TEST PROCEDURES

Unless otherwise specified, perform tests on specimens which have been fully recovered by conditioning for

3 minutes in a 200 ± 5°C (392 ± 9°F) oven. 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 for 3 hours prior to all

testing. Use mechanical convection type ovens in which air passes the specimens at a velocity of 100 to 200

feet (30 to 60 m) per minute.

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 3 minutes in a 200 ± 5°C (392 ±

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 = L1 - L0

L0 x 100

Where: C = Longitudinal Change [Percent]

0 = Length Before Conditioning [Inches (mm)]

1 = Length After Conditioning [Inches (mm)]

4.3.2 Tensile Strength and Ultimate Elongation

Determine the tensile strength and ultimate elongation of the tubing in accordance with

ASTM D 2671 using 1-inch (25-mm) bench marks, a 1-inch (25-mm) initial jaw separation, and jaw

separation speed of 2 ± 0.2 inches (50 ± 5 mm) per minute.

4.4 REJECTION AND RETEST

Failure of any sample of tubing to conform to 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 defects and resubmitted for acceptance. Before resubmitting, full particulars concerning previous

rejection and action taken to correct the defects shall be furnished to the inspector.

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Page 4 SPECIFICATION RT-360 ISSUE 8

5. PREPARATION FOR DELIVERY

5.1 PACKAGING

Packaging shall be in accordance with good commercial practice.

5.2 MARKING

Each container of tubing shall be permanently and legibly marked with the size, quantity, manufacturer's

name, part number, specification number, and lot number.

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SPECIFICATION RT-360 ISSUE 8 Page 5

TABLE 1

Tubing Dimensions

As Supplied As Recovered

Inside Diameter Inside Diameter Wall Thickness

Size Minimum Maximum Minimum Maximum Nominal

in.

mm. in. mm. in. mm. in. mm. in. mm.

3/64 .046 1.17 .023 0.58 .017 0.43 .023 0.58 .020 0.50

1/16 .063 1.60 .031 0.79 .017 0.43 .023 0.58 .020 0.50

3/32 .093 2.36 .046 1.17 .017 0.43 .023 0.58 .020 0.50

1/8 .125 3.17 .062 1.57 .017 0.43 .023 0.58 .020 0.50

3/16 .187 4.74 .093 2.36 .022 0.56 .028 0.71 .025 0.63

1/4 .250 6.35 .125 3.17 .022 0.56 .028 0.71 .025 0.63

3/8 .375 9.50 .187 4.74 .027 0.69 .033 0.84 .030 0.76

1/2 .500 12.70 .250 6.35 .027 0.69 .033 0.84 .030 0.76

TABLE 2

Mandrel Dimensions for Bend Testing

Tubing Size Mandrel Diameter

in.

mm.

3/64 to 1/4 inclusive 5/16 7.9

3/8 to 1/2 inclusive 3/8 9.5

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Page 6 SPECIFICATION RT-360 ISSUE 8

TABLE 3

Requirements

REQUIREMENT

PROPERTY UNIT TYPE 1 TYPE 2 TEST METHOD

PHYSICAL

Dimensions

Inches (mm)

In accordance

with Table 1

In accordance

with Table 1

Section 4.3.1

ASTM D 2671

Longitudinal Change Percent +/-5 +/-5

Tensile Strength psi (MPa) 2000 minimum

(13.8)

2000 minimum

(13.8)

Section 4.3.2

ASTM D 2671

Ultimate Elongation Percent 200 minimum 200 minimum

Secant Modulus (Expanded) psi (MPa) 2.5 x 104

minimum (172)

2.5 x 104

minimum (172)

ASTM D 2671

Specific Gravity --- 1.35 maximum 1.0 maximum ASTM D 2671

Low Temperature Flexibility

4 hours at -55 ± 1°C (-67 ± 2°F)

--- No cracking No cracking Table 2

ASTM D 2671

Procedure C

Heat Shock

4 hours at 250 ± 3°C (482 ± 5°F)

--- No dripping,

flowing or

cracking

No dripping,

flowing or

cracking

Table 2

ASTM D 2671

Heat Resistance

168 hours at 175 ± 2°C (347 ± 4°F)

Followed by test for:

--- --- --- ASTM D 2671

Ultimate Elongation Percent 150 minimum 150 minimum

ELECTRICAL

Dielectric Strength

Volts/mil

(volts/mm)

500 minimum

(19,680)

500 minimum

(19,680)

NOTE 1

ASTM D 2671

Volume Resistivity ohm-cm 1014 minimum 1016 minimum ASTM D 2671

CHEMICAL

Copper Mirror Corrosion

16 hours at 150 ± 2°C (302 ± 4°F)

---

No removal of

copper

No removal of

copper

ASTM D 2671

Procedure A

Copper Contact Corrosion

168 hours at 150 ± 2°C (302 ± 4°F)

--- No pitting or

blackening of

copper

No pitting or

blackening of

copper

ASTM D 2671

Procedure B

Flammability --- Self-

extinguishing

within

1 minute, 25%

maximum flag

burn, no falling

burning

particles

Not Applicable ASTM D 2671

Procedure B

NOTE 1: Recover the specimens on the metal mandrels for 10 minutes, minimum, at 175 ± 3±C (347 ± 5±F) or until

the tubing is completely shrunk on the mandrels.

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SPECIFICATION RT-360 ISSUE 8 Page 7

TABLE 3

Requirements

(continued)

REQUIREMENT

PROPERTY UNIT TYPE 1 TYPE 2 TEST METHOD

CHEMICAL (continued)

Fungus Resistance

Tensile Strength

Ultimate Elongation

Dielectric Strength

psi (Mpa)

percent

Volts per mil

(volts per mm)

2000 minimum

(13.8)

200 minimum

500 minimum

(19,680)

2000 minimum

(13.8)

200 minimum

500 minimum

(19,680)

ISO 846 Method B

Section 4.3.2

ASTM D 2671

Water Absorption

24 hours at 23 ± 3°C (73 ± 5°F)

Percent 0.5 maximum 0.2 maximum ASTM D 2671

Fluid Resistance

24 hours at 23 ± 3°C (73 ± 5°F) in:

JP-4 Fuel (MIL-T-5624)

Skydrol* 500

Hydraulic Fluid (MIL-H-5606)

Aviation Gasoline (100/130)

(MIL-G-5572)

Water

Followed by tests for:

--- --- --- ASTM D 2671

Dielectric Strength Volts/mil

(volts/mm)

400 minimum

(15,760)

400 minimum

(15, 760)

Tensile Strength psi (MPa) 1600 minimum

(11.0)

1600 minimum

(11.0)

*Trademark of the Monsanto Company

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