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(R) 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 135C (275F). 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 MIL-H-5606 MIL-T-5624 2.2 Gasoline, Aviation, Grades 80/87, 100/130, and 115/145 Hydraulic Fluid, Petroleum Base, Aircraft, Missile and Ordnance Turbine Fuel, Aviation, Grades JP-4 and JP-5 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.) If this document is printed it becomes uncontrolled. Check for the latest revision. 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. 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. If this document is printed it becomes uncontrolled. Check for the latest revision. SPECIFICATION RT-360 ISSUE 8 4.3 Page 3 TEST PROCEDURES Unless otherwise specified, perform tests on specimens which have been fully recovered by conditioning for 3 minutes in a 200 5C (392 9F) oven. Condition the test specimens (and measurement gauges, when applicable) for 3 hours at 23 3C (73 5F) 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 5C (392 9F) oven, cool to 23 3C (73 5F) 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 = Where: 4.3.2 L1 - L0 x 100 L0 C = Longitudinal Change [Percent] L0 = Length Before Conditioning [Inches (mm)] L1 = Length After Conditioning [Inches (mm)] 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. If this document is printed it becomes uncontrolled. Check for the latest revision. 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. If this document is printed it becomes uncontrolled. Check for the latest revision. SPECIFICATION RT-360 ISSUE 8 Page 5 TABLE 1 Tubing Dimensions Size 3/64 1/16 3/32 1/8 3/16 1/4 3/8 1/2 As Supplied Inside Diameter Minimum mm. in. .046 1.17 .063 1.60 .093 2.36 .125 3.17 .187 4.74 .250 6.35 .375 9.50 .500 12.70 Inside Diameter Maximum mm. in. .023 0.58 .031 0.79 .046 1.17 .062 1.57 .093 2.36 .125 3.17 .187 4.74 .250 6.35 As Recovered Wall Thickness Minimum Maximum mm. mm. in. in. .017 0.43 .023 0.58 .017 0.43 .023 0.58 .017 0.43 .023 0.58 .017 0.43 .023 0.58 .022 0.56 .028 0.71 .022 0.56 .028 0.71 .027 0.69 .033 0.84 .027 0.69 .033 0.84 TABLE 2 Mandrel Dimensions for Bend Testing Tubing Size 3/64 to 1/4 inclusive 3/8 to 1/2 inclusive Mandrel Diameter mm. in. 5/16 7.9 3/8 9.5 If this document is printed it becomes uncontrolled. Check for the latest revision. Nominal mm. in. .020 0.50 .020 0.50 .020 0.50 .020 0.50 .025 0.63 .025 0.63 .030 0.76 .030 0.76 Page 6 SPECIFICATION RT-360 ISSUE 8 TABLE 3 Requirements PROPERTY PHYSICAL Dimensions Inches (mm) Longitudinal Change Tensile Strength Percent psi (MPa) Ultimate Elongation Secant Modulus (Expanded) Percent psi (MPa) Specific Gravity Low Temperature Flexibility 4 hours at -55 1C (-67 2F) ----- Heat Shock 4 hours at 250 3C (482 5F) --- Heat Resistance 168 hours at 175 2C (347 4F) Followed by test for: Ultimate Elongation ELECTRICAL Dielectric Strength Volume Resistivity CHEMICAL Copper Mirror Corrosion 16 hours at 150 2C (302 4F) Copper Contact Corrosion 168 hours at 150 2C (302 4F) Flammability UNIT REQUIREMENT TYPE 1 TYPE 2 TEST METHOD In accordance with Table 1 +/-5 2000 minimum (13.8) 200 minimum 2.5 x 104 minimum (172) 1.35 maximum No cracking In accordance with Table 1 +/-5 2000 minimum (13.8) 200 minimum 2.5 x 104 minimum (172) 1.0 maximum No cracking --- No dripping, flowing or cracking --- No dripping, flowing or cracking --- Percent 150 minimum 150 minimum Volts/mil (volts/mm) ohm-cm 500 minimum (19,680) 1014 minimum 500 minimum (19,680) 1016 minimum NOTE 1 ASTM D 2671 ASTM D 2671 --- No removal of copper No pitting or blackening of copper Selfextinguishing within 1 minute, 25% maximum flag burn, no falling burning particles No removal of copper No pitting or blackening of copper Not Applicable ASTM D 2671 Procedure A ASTM D 2671 Procedure B ----- Section 4.3.1 ASTM D 2671 Section 4.3.2 ASTM D 2671 ASTM D 2671 ASTM D 2671 Table 2 ASTM D 2671 Procedure C Table 2 ASTM D 2671 ASTM D 2671 ASTM D 2671 Procedure B NOTE 1: Recover the specimens on the metal mandrels for 10 minutes, minimum, at 175 3C (347 5F) or until the tubing is completely shrunk on the mandrels. If this document is printed it becomes uncontrolled. Check for the latest revision. SPECIFICATION RT-360 ISSUE 8 Page 7 TABLE 3 Requirements (continued) PROPERTY CHEMICAL (continued) Fungus Resistance Tensile Strength Ultimate Elongation Dielectric Strength Water Absorption 24 hours at 23 3C (73 5F) Fluid Resistance 24 hours at 23 3C (73 5F) 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: Dielectric Strength Tensile Strength UNIT REQUIREMENT TYPE 1 TYPE 2 TEST METHOD ISO 846 Method B 2000 minimum (13.8) 200 minimum 500 minimum (19,680) 0.2 maximum Section 4.3.2 percent Volts per mil (volts per mm) Percent 2000 minimum (13.8) 200 minimum 500 minimum (19,680) 0.5 maximum --- --- --- ASTM D 2671 Volts/mil (volts/mm) psi (MPa) 400 minimum (15,760) 1600 minimum (11.0) 400 minimum (15, 760) 1600 minimum (11.0) psi (Mpa) *Trademark of the Monsanto Company If this document is printed it becomes uncontrolled. Check for the latest revision. ASTM D 2671 ASTM D 2671 ASTM D 2671