VPB-2-1/2-0-SP (4010894001) - Tyco Electronics

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Tyco Electronics Corporation

300 Constitution Drive

Menlo Park, CA 94025 USA

Specification

This Issue:

Date:

Replaces:

RT-1148

Issue 8

Oct 6, 2005

Issue 7

Tyco Modified Fluoroelastomer Tubing

Flexible, Abrasion Resistant, Heat-Shrinkable

1.0 Scope

This specification covers the requirements for one type of highly flexible, electrical-

insulating extruded tubing whose diameter will reduce to a predetermined size upon the

application of heat in excess of 175°C (347°F).

2.0 Applicable Documents

This specification takes precedence over documents referenced herein. Unless otherwise

specified, the latest issue of the referenced document applies. The following documents

form a part of this specification to the extent specified herein.

2.1 Government Furnished Documents

Military

MIL-DTL-83133 Turbine Fuels, Aviation, Kerosene Types, Nato F-34 (JP-8), Nato F-35

and JP-8+100

SAE-AMS-1424 Anti-Icing and Deicing - Defrosting Fluid

MIL-PRF-46170 Hydraulic Fluid, Rust Inhibited, Fire-resistant, Synthetic Hydrocarbon

Base

Federal

A-A-59133 Commercial Item Description Cleaning Compound, High Pressure

(Steam) Cleaner

A-A-52557 Fuel Oil, Diesel; for Posts, Camps and Stations

2.2 Other Publications

American Society for Testing & Materials (ASTM)

D 4814 Automotive Spark-Ignition Engine Fuel Std. Spec. for

D 257 Standard Test Methods for D-C Resistance or Conductance of Insulating

Materials

D 2240 Test Method for Rubber Property -- Durometer Hardness

D 2671 Method of Testing Heat-Shrinkable Tubing for Electrical Use

G-21 Standard Recommended Practice for Determining Resistance to Synthetic

Polymeric Materials to Fungi

(Copies of ASTM publications may be obtained from the American Society for Testing

& Materials, 1916 Race Street, Philadelphia, Pennsylvania 19103.)

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3.0 Requirements

3.1 Material

The tubing shall be fabricated from thermally stabilized, modified fluoroelastomer and

shall be crosslinked by irradiation. It shall be homogeneous and essentially free from

flaws, defects, pinholes, bubbles, seams, cracks and inclusions.

3.2 Color

The tubing shall be black.

3.3 Properties

The tubing shall meet the requirements of Table 3.

4.0 Quality Assurance Provisions

4.1 Classification of Tests

4.1.1 Qualification Tests

Qualification tests are those performed on samples submitted for qualification as

satisfactory products 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, Tensile Stress, Ultimate Elongation, Heat Shock and Hardness.

4.2 Sampling Instructions

4.2.1 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 will qualify all sizes in the same range.

Range of Sizes

1/4 through 3/4

7/8 through 3

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.

4.3 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 ± 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-1148 ISSUE 8 Page 3

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4.3.1 Dimensions and Longitudinal Change

Measure three 6 inch (152 mm) specimens of tubing, as supplied, for length ± 1/32 inch

(± 1 mm) and inside diameter in accordance with ASTM D 2671. Condition these

specimens for 10 minutes in a 200 ± 5°C (392 ± 9°F) oven or equivalent, cool to 23 ±

3°C (73 ± 5°F) and then remeasure. Calculate longitudinal change as follows:

C = L1 - L0

L0 x 100

Where: C = Longitudinal Change [Percent]

L0 = Length Before Conditioning [inches (mm)]

L1 = Length After Conditioning [inches (mm)]

4.3.2 Tensile Strength, Tensile Stress and Elongation

Test three specimens of tubing for tensile strength, tensile stress and elongation in

accordance with ASTM D 2671. 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 D of

ASTM D 412. The specimens shall have1 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 (51 mm) for die-cut specimens. The rate of jaw separation

shall be 20 ± 2 inches (508 ± 50 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 ± 5°C (-85 ± 9°F) for 4 hours. For tubing sizes 3/4 or

less, the specimens shall be whole sections of tubing recovered on a stranded wire

(nearest AWG which is larger than the sleeving maximum inside diameter after

unrestricted shrinkage). For tubing sizes larger than 3/4, the specimens shall be 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 around the mandrel for not less than 360 degrees in 10 ± 2 seconds then

visually examine the specimens for evidence of cracking.

4.3.4 Heat Shock

Three 6 inch (152 mm) specimens of tubing shall be conditioned for 4 hours in a 225 ±

5°C (437 ± 9°F) oven. After conditioning, remove the specimens from the oven, cool to

room temperature and bend through 180 degrees in 2 to 4 seconds over a mandrel

selected in accordance with Table 2. Visually examine the specimens for evidence of

dripping, flowing or cracking. Any side-cracking caused by flattening of the specimen on

the mandrel shall not constitute failure.

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4.3.5 Heat Resistance

Three 6 inch (152 mm) specimens of tubing shall be conditioned for 168 hours in a 150 ±

3°C (302 ± 5°F) oven. After conditioning, remove the specimens from the oven, cool to

room temperature and test for ultimate elongation in accordance with 4.3.2.

4.3.6 Copper Stability

Three 6 inch (152 mm) specimens of tubing shall be slid over snug- fitting, straight,

clean, bare copper mandrels, either solid or tubular. The specimens on the mandrels shall

be conditioned for 24 hours in a desiccator or similar humidity chamber at 90 to 95

percent relative humidity and 25 ± 3°C (77 ± 5°F).

The specimens on the mandrels then shall be conditioned for 168 hours in a 150 ± 2°C

(302 ± 4°F) oven. After conditioning, the specimens shall be removed from the oven and

cooled to 23 ± 3°C (73 ± 5°F).

The copper mandrels shall then be removed from the tubing and the tubing and copper

mandrels shall be examined. Darkening of the copper due to normal air oxidation shall

not be cause for rejection. The tubing shall be tested for ultimate elongation in

accordance with 4.3.2.

4.3.7 Dielectric Strength

The dielectric strength shall be determined by following the ASTM D 2671 procedure

for dielectric breakdown. When dielectric breakdown occurs the thickness

measurements for calculating dielectric strength shall be made adjacent to the point of

breakdown and the dielectric strength shall be calculated in volts per mil.

4.3.8 Corrosive Effect

The tubing shall be tested for copper mirror corrosion in accordance with ASTM D 2671,

Procedure A. The specimens shall be conditioned for 16 hours at 175 ± 3°C (347 ± 5°F).

4.3.9 Fluid Resistance

Six specimens, three 6 inch (152 mm) tubing specimens, which shall be weighed prior to

immersion and three tensile specimens prepared and measured in accordance with 4.3.1,

shall be immersed for 24 hours in each of the test fluids listed in Table 3 at the

temperature specified. The volume of the fluid shall not be less than 20 times that of the

specimens. After conditioning, all the specimens shall be lightly wiped and air dried for

45 ± 15 minutes at 23 ± 3°C (73 ± °F). The three specimens intended for the tensile

strength and elongation tests shall then be tested in accordance with 4.3.2. The other

three specimens shall be weighed before and after immersion and the weight change

calculated as a percentage.

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 defect and then resubmitted for

acceptance. Before resubmitting, full particulars concerning the rejection and the action

taken to correct the defect shall be furnished the inspector.

SPECIFICATION RT-1148 ISSUE 8 Page 5

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5.0 Preparation For Delivery

5.1 Form

Unless otherwise specified, the tubing shall be supplied on spools.

5.2 Packaging

The tubing shall be packaged in accordance with good commercial practice. The exterior

shipping container shall not be less than 125-pound-test fiberboard.

5.3 Marking

Each bundle or container of tubing shall be permanently and legibly marked with the

size, quantity, manufacturer's identification and a lot number.

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TABLE 1

TUBING DIMENSIONS

Expanded

As Supplied

Recovered Dimensions -- After Heating

Size Inside Diameter Inside Diameter Wall Thickness

Minimum Maximum Minimum Maximum Nominal

in.

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

1/4 0.250 6.35 0.125 3.18 0.028 0.71 0.042 1.06 0.035 0.88

3/8 0.375 9.53 0.187 4.75 0.028 0.71 0.042 1.06 0.035 0.88

1/2 0.500 12.70 0.250 6.35 0.028 0.71 0.042 1.06 0.035 0.88

5/8 0.625 15.87 0.312 7.92 0.035 0.88 0.049 1.24 0.042 1.06

3/4 0.750 19.05 0.375 9.53 0.035 0.88 0.049 1.24 0.042 1.06

7/8 0.875 22.22 0.437 11.09 0.035 0.88 0.055 1.39 0.045 1.14

1 1.000 25.40 0.500 12.70 0.038 0.96 0.060 1.52 0.049 1.24

1-1/4 1.250 31.75 0.625 15.87 0.040 1.00 0.070 1.77 0.055 1.39

1-1/2 1.500 38.10 0.750 19.05 0.040 1.00 0.070 1.77 0.055 1.39

2 2.000 50.80 1.000 25.40 0.048 1.21 0.082 2.08 0.065 1.63

3 3.000 76.20 1.500 38.10 0.048 1.21 0.082 2.08 0.065 1.63

TABLE 2

Mandrel Dimensions

Tubing Mandrel Diameter

in. mm.

1/4 to 3/8 inclusive 5/16 7.9

1/2 to 3 inclusive 7/16 11.1

SPECIFICATION RT-1148 ISSUE 8 Page 7

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TABLE 3

Requirements

PROPERTY UNIT REQUIREMENT TEST METHOD

PHYSICAL

Dimensions

inches (mm)

In accordance with Table 1

Section 4.3.1

Longitudinal Change percent -10 to +2 ASTM D 2671

Tensile Strength psi (MPa) 2500 (17.2) minimum Section 4.3.2

Tensile Stress at 100% elongation psi (MPa) 1500 (10.3) maximum ASTM D 2671

Ultimate Elongation percent 350 minimum

Specific Gravity 1.5 maximum ASTM D 2671

Hardness Shore A 80 ± 10 ASTM D 2240

Low Temperature Flexibility

4 hours at -65 ± 5°C (-85 ± 9°F) --- No cracking Section 4.3.3

Heat Shock

4 hours at 225 ± 5°C (437 ± 9°F) --- No dripping, flowing or cracking Section 4.3.4

Heat Resistance

168 hours at 150 ± 3°C (302 ± 5°F)

Followed by test for:

--- --- Section 4.3.5

Tensile Strength

Ultimate Elongation psi

percent 2000 (13.8) minimum

300 minimum Section 4.3.2

Copper Stability

168 hours at 150 ± 2°C (302 ± 4°F)

Followed by test for:

No brittleness, glazing or

cracking of tubing; no pitting

or blackening of copper

Section 4.3.6

Ultimate Elongation percent 200 minimum Section 4.3.2

ELECTRICAL

Dielectric Strength

Volts/mil

(Volts/mm)

300 (11,800) minimum

Section 4.3.7

Volume Resistivity ohm-cm 1010 minimum ASTM D 257

CHEMICAL

Flammability

seconds

Self-extinguishing within

15 seconds; no dripping or

flowing; no burning or charring

of indicator

ASTM D 2671

Corrosive Effect

16 hours at 175 ± 3°C (347 ± 5°F) Noncorrosive Section 4.3.8

ASTM D 2671

Fungus Resistance Rating of 1 or less ASTM G 21

Fluid Resistance

24 hours at 25 ± 3°C (77 ± 5°F) in:

Cleaning Compound (A-A-59133)

Gasoline Automotive

(ASTM D 4814)

JP-8 Fuel (MIL-DTL-83133)

--- --- Section 4.3.9

Water

Followed by tests fo r:

Tensile Strength psi (MPa) 1800 (11.0) minimum Section 4.3.2

Ultimate Elongation percent 300 minimum

Weight Increase percent 20 maximum Section 4.3.9

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TABLE 3

Requirements

CHEMICAL (Continued)

Fluid Resistance

24 hours at 50 ± 3°C (122 ± 5°F) in:

Deicing Fluid (SAE-AMS-1424)

Hydraulic Fluid (MIL-PRF-46170)

Diesel Fuel (A-A-52557)

5% Salt Solution (ASTM D 632)

Followed by tests fo r:

--- --- Section 4.3.9

Tensile Strength psi (MPa) 1800 (11.0) minimum Section 4.3.2

Ultimate Elongation percent 300 minimum

Weight Increase percent 10 maximum Section 4.3.9

Fluid Resistance

24 hours at 100 ± 3°C (212 ± 5°F) in:

Hydraulic Fluid (MIL-PRF-46170)

--- --- Section 4.3.9

Followed by tests fo r:

Tensile Strength psi (MPa) 1800 (11.0) minimum Section 4.3.2

Ultimate Elongation percent 300 minimum

Weight Increase percent 10 maximum Section 4.3.9