ASTM F1836M-97(2002)

Standard Specification for Stuffing Tubes, Nylon, and Packing Assemblies (Metric)

SCOPE
1.1 This specification covers the general requirements for nylon stuffing tubes and packing assemblies. Nylon stuffing tubes are intended for making electric cable penetrations in marine shipboard enclosures for electrical equipment. The following types are suitable for both thin-wall enclosures up to 5 mm (3/16 in.) thick and thick-wall enclosures, bulkheads, and decks of 5 to 19 mm (3/16 to 3/4 in.) thick.  
1.2 This specification does not cover metal stuffing tubes.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 09-Nov-1997
• ICS: 47.020.60 - Electrical equipment of ships and of marine structures
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.10 - Electrical

Relations

• Replaced By: ASTM F1836M-97(2007) - Standard Specification for Stuffing Tubes, Nylon, and Packing Assemblies (Metric)
• Effective Date: 01-May-2007

Standards Content (Sample)

An American National Standard
Designation: F 1836M – 97 (Reapproved 2002)
Standard Specification for
Stuffing Tubes, Nylon, and Packing Assemblies (Metric)
This standard is issued under the fixed designation F 1836M; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.1 nylon stuffıng tube, n—a marine electrical fitting used
for the sealing of cable penetration into shipboard enclosures
1.1 This specification covers the general requirements for
while maintaining or exceeding the degree of protection for
nylon stuffing tubes and packing assemblies. Nylon stuffing
which the enclosure is rated.
tubes are intended for making electric cable penetrations in
3.1.2 packing assembly, n—the compressible insert for the
marine shipboard enclosures for electrical equipment. The
nylon stuffing tube. It consists of one neoprene bushing and
following types are suitable for both thin-wall enclosures up to
three nylon washers.
5mm( ⁄16 in.) thick and thick-wall enclosures, bulkheads, and
3 3 3.1.3 enclosure, n—an electrical panel, cabinet, junction
decks of 5 to 19 mm ( ⁄16 to ⁄4 in.) thick.
box, light fixture, electrical equipment, control box, or panel.
1.2 This specification does not cover metal stuffing tubes.
1.3 This standard does not purport to address all of the
4. Classification
safety concerns, if any, associated with its use. It is the
4.1 Nylon stuffing tubes shall be of the following types (see
responsibility of the user of this standard to establish appro-
Fig. 1):
priate safety and health practices and determine the applica-
4.1.1 Type 1—straight—Unified Form Thread.
bility of regulatory limitations prior to its use.
4.1.2 Type 2—90°—Unified Form Thread.
2. Referenced Documents 4.1.3 Type 3—NPT—American Standard Pipe Thread.
4.1.4 Type 4—Y—Unified Form Thread.
2.1 ASTM Standards:
D 2000 Classification System for Rubber Products in Auto-
5. Ordering Information
motive Applications
5.1 Orders for stuffing tubes under this specification shall
D 4066 Specification for Nylon Injection and Extrusion
3 include the following:
Materials (PA)
5.1.1 Type (see 4.1).
2.2 NEMA Standards:
5.1.2 Part number (see Table 1).
Standard 250 Enclosures for Electrical Equipment (1000 V
4 5.1.3 Packing assembly size (see Fig. 2 and Table 2).
Max)
5.1.4 The O-ring included in the stuffing tube assembly has
2.3 ASME Standard:
a finite shelf life. If the stuffing tube assembly is used after the
ASME B1.1 Unified Inch Screw Threads (UN and UNR
shelf life has expired, the O-ring should be replaced, using the
Thread Form)
appropriate size listed in Table 1.
2.4 IEC Standard
Standard 68-2-6 Environmental Testing–Part 2: Tests–Test
6. Materials and Manufacture
FC: Vibration (Sinusoidal) Sixth Edition
6.1 Materials:
3. Terminology 6.1.1 Polyamide (nylon) molding plastic material shall be
Group 1, Class 8, Grade 1 in accordance with Specification
3.1 Definitions of Terms Specific to This Standard:
D 4066.
6.1.2 Synthetic rubber (neoprene) shall be in accordance
This specification is under the jurisdiction of ASTM Committee F25 on Ships with Classification D 2000, M2, BC, 410, A14, B14, C12, and
and Marine Technology and is the direct responsibility of Subcommittee F25.10 on
F19.
Electrical.
6.2 Manufacture:
Current edition approved Nov. 10, 1997. Published September 1998.
6.2.1 Molded nylon parts, such as body, washers, locknut,
Annual Book of ASTM Standards, Vol 09.02.
Annual Book of ASTM Standards, Vol 08.02.
and cap, shall meet the requirements specified herein.
Available from the National Electrical Manufacturers Association, 1300 N.
6.2.2 Threads shall be unified form UN 2A or 2B or taper
17th St., Suite 1847, Rosslyn, VA 22209.
5 pipe thread (NPT) as specified in ASME Standard B1.1.
Available from the International Electrotechnical Commission, 3 rue de
Varembe, Case postale 131, CH-1211, Geneva 20, Switzerland. 6.2.3 Neoprene parts, such as bushing and plug, shall meet
Available from American Society of Mechanical Engineers (ASME), ASME
the requirements specified in Classification D 2000, and when
International Headquarters, Three Park Ave., New York, NY 10016-5990.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F 1836M
FIG. 1 Stuffing Tube Types
assembled in a stuffing tube, shall meet the performance 8. Workmanship, Finish, and Appearance
requirements specified herein.
8.1 Stuffing tubes shall be free from warp, cracks, chipped
edges or surfaces, blisters, uneven surfaces, scratches, dents,
7. Other Requirements
and heat marks. They shall be free from fins, burrs, and
7.1 Performance Requirements:
unsightly finish caused by chipping, filing, or grinding without
7.1.1 Vibration resistance—When stuffing tubes are tested
subsequent buffing or polishing. All molded nylon parts shall
as specified in 9.1, there shall be no evidence of cracking or
be cleaned thoroughly of annealing mediums. Packing assem-
loosening of parts.
blies shall be free of voids, pin holes, flash, or other imperfec-
7.1.2 Ruggedness—When stuffing tubes are subjected to a
tions, that may impair their serviceability.
mechanical abuse test as specified in 9.2, there shall be no
9. Test Methods
cracking, breaking, distortion, or damage to the sample.
7.1.3 Effectiveness of seal—When stuffing tubes are tested 9.1 Conformance testing of a random sample may be
as specified in 9.3, there shall be no evidence of leakage requested by the purchaser to verify that selected performance
through or around the stuffing tubes. characteristics specified herein have been incorporated in the
F 1836M
TABLE 1 Stuffing Tubes Part Numbers and Dimensional Data
Tube Part Cable Range Packing Clearance Hole Diameter O-Ring
A
Size No. in. mm Assembly for Tube Install Buna-N
min. max. min. max. in. mm Size
1 Type-1-001 0.077 0.300 1.96 7.62 -16 0.885 22.48 212
2 -002 0.275 0.472 6.99 11.99 -17 1.010 25.65 214
3 -003 0.410 0.472 10.41 11.99 -18 1.135 28.83 216
Straight 4 -004 0.450 0.777 11.43 19.74 -19 1.260 32.00 218
Type 1 4T -005 0.450 0.777 11.43 19.74 -19 1.385 35.18 220
5 -006 0.752 1.113 19.10 28.27 -20 2.010 51.05 226
6 -007 0.806 1.390 20.47 35.31 -21 2.510 63.75 230
7 -008 1.433 1.610 36.40 40.89 -22 2.760 70.10 232
8 -009 1.625 2.00 41.28 50.80 -23 3.260 82.80 236
9 -010 2.030 2.700 51.56 68.58 -24 4.010 101.85 242
Tube Part Cable Range Packing Clearance Hole Diameter O-Ring
A
Size No. in. mm Assembly for Tube Install Buna-N
min. max. min. max. in. mm Size
1 Type-2-001 0.077 0.300 1.96 7.62 -16 0.885 22.48 212
90° 2 -002 0.275 0.472 6.99 11.99 -17 0.885 22.48 212
Type 2 3 -003 0.410 0.472 10.41 11.99 -18 1.135 28.83 216
4T -005 0.450 0.777 11.43 19.74 -19 1.260 32.00 218
5 -006 0.752 1.113 19.10 28.27 -20 2.010 51.05 220
6 -007 0.806 1.390 20.47 35.31 -21 2.510 63.75 230
Tube Part Cable Range Packing NPT
A
Size No. in. mm Assembly
min. max. min. max.
1 Type-3-001 0.077 0.300 1.96 7.62 -16 0.5
2 -002 0.275 0.472 6.99 11.99 -17 0.75
3 -003 0.410 0.472 10.41 11.99 -18 1.0
NPT 4T -004 0.450 0.777 11.43 19.74 -19 1.0
Type 3 5 -005 0.752 1.113 19.10 28.27 -20 1.5
6 -006 0.806 1.390 20.47 35.31 -21 2
7 -007 1.433 1.610 36.40 40.89 -22 2.5
8 -008 1.625 2.00 41.28 50.80 -23 3
9 -009 2.030 2.700 51.56 68.58 -24 3.5
Tube Part Cable Ranges Packing Clearance Hole Diameter O-Ring
A
Size No. in. mm Assembly for Tube Install Buna-N
min. max. min. max. in. mm Size
1 Type-4-001 0.077 0.300 1.96 7.62 -16 0.885 22.48 212
Y 2 -002 0.275 0.472 6.99 11.99 -17 1.010 25.65 214
Type 4 3 -003 0.410 0.472 10.41 11.99 -18 1.135 28.83 216
4T -004 0.450 0.777 11.43 19.74 -19 1.385 35.18 220
A
See Table 2 size selection.
9.1.1.2 The free end of the cables shall be secured to prevent
excessive cable whipping action during test.
9.1.1.3 Tests are to be carried out in three perpendicular
planes.
9.1.1.4 Duration of the test for no resonance condition shall
be 90 min at 30 Hz. Duration at each resonance frequency at
which Q > 2 is recorded. It is recommended as guidance that Q
does not exceed 5.
9.1.1.5 Test range shall be 2 6 0.3 Hz to 13.2 Hz –
FIG. 2 Typical Packing Assembly
amplitude 61 mm: 13.2 to 100 Hz – acceleration 67g.
9.1.1.6 Nonconformance to the requirements of 7.1.1 shall
stuffing tube design and maintained in production.
be cause for rejection.
9.1.1 Vibration—The stuffing tubes shall be subjected to
9.2 Mechanical Abuse Test:
vibration testing as specified in IEC Standard 68-2-6. The
following details shall apply: 9.2.1 Mechanical abuse test shall be conducted on the
9.1.1.1 The stuffing tubes shall be complete with O-rings sample stuffing tubes assembled with packing assembly on the
and 1- to 2-m (3- to 6-ft) lengths of cable of appropriate size. end of a 2-m (6-ft) length of electrical cable of appropriate size.
F 1836M
TABLE 2 Packing Assembly Size
NOTE 1—Packing assembly selection requires that the packing bushing inner diameter (D) be equal or slightly larger than the cable maximum diameter
(DIA).
NOTE 2—
...