挪威船级社(DNV)

APPENDIX A – DNV TYPE APPROVAL - 828.50
CABLE TIES
APRIL 2010
1.Introduction
This appendix contains the requirement on which DNV normally bases its type approval of Cable ties, used for Ships and Offshore Units.
The below is liable to change in the light of new experience gained.
1.1Document to be submitted for assessment (in triplicate)
1)Application for Type Approval form 90.01a. Only one copy.
2)Declaration form for cable ties (Chapter 3 in this programme)
3)Data sheets for each family of cable ties, giving information for each variant about:
a)type designation
b)part number
c)Specification of applied materials
d)dimensions (width, length, thickness)
e)loop tensile strength
f)minimum and maximum bundle diameter
g)colour
h)drawings or photographs illustrating product
1.2Design requirements
DNV Type approved cable ties shall comply with the relevant requirements of the following publications:
1.2.1General requirements
-DNV Rules for Classification of Ships/High Speed Light Craft & Naval Surface Craft and DNV Offshore standards (as applicable).
1.2.2Special requirements
IEC 62275 (2006-10) Cable management systems – Cable ties for electrical installations.
1.2.3Application limitations based on DNV Rule requirements:
For non-metallic cable ties:
a)Cables placed on non-horizontal cable trays or supports, shall have additional fixing by metallic cable clips or saddles at
regular distances (e.g. 1 to 2 m) in order to retain the cable during a fire.
b)Non-UV resistant cable ties shall not be used on open deck.
Applicable for all cable ties:
a)Ambient operation air temperature is from -25°C to +45°C for cable ties installed on open deck, in dry cargo holds, steering
gear compartments, deckhouses, forecastle spaces and similar spaces not provided with space heating.
b)Cable ties used for fixing of single-core cables must be dimensioned to withstand short circuit electro-dynamic forces.
c)Where cargo gases or vapours are liable to damage the cable ties, careful consideration shall be given to the characteristics
of the materials selected.
1.3Requirements of identification of product type with certificate
The product is to be provided with visible marking, giving at least the following information:
Manufacturer's name or trade mark - Type designation.
The marking is to be carried out in such a way that it is visible, legible and indelible throughout the anticipated life of the product, and that the marks can be traced back to the type approval certificate. For smaller products, marking on packing only can be accepted.
1.4Test requirements
Please refer to table of tests chapter 2 and IEC62275.
1.4.1How to pick out test samples
The DNV surveyor at responsible approval centre shall normally pick out test samples.
According to IEC62275 each test shall be carried out on a new set of 10 cable ties.
The type testing shall be carried out on specimens or products
representative of the production. (the smallest and the largest size in product range, and 1 size in between).
2. Table of tests:
The cable ties shall be tested according to the requirements in IEC62275.
Material
Reference to IEC 62275
Type test:
M = Mandatory test, V = Voluntary test n/a = Not Applicable
Metallic 6.1.1
Non Metallic 6.1.2 Composite 6.1.3
Mechanical properties :
9.2 Installation test
M M
M
9.3 Minimum installation temperature test n/a 1M M 9.4 Minimum operating temperature test
n/a 2
M M 9.5
Loop tensile strength test for ties retaining 50 % strength after testing (Tests to be performed as received condition, after heat and after temperature cycling)
n/a
M
(9.5 or 9.6)
M
(9.5 or 9.6)
9.6 Loop tensile strength test for ties retaining 100 % strength after testing (Tests to be performed as received condition, after heat, after temperature cycling and vibration 3)
M M (9.5 or 9.6)
M
(9.5 or 9.6)
9.7 Mechanical strength test for fixing devices
(Tests to be performed as received condition, after heat, after temperature cycling) V V V
10 Contribution to fire 4
V V V Environmental influences 11.1 Resistance to UV light n/a
M
M
11.2
Resistance to corrosion 5
M M M
1 Compliance by this test is checked for non metallic and composite cable ties only, ref. 9.1.
2 Compliance by this test is checked for non metallic and composite cable ties only, ref. 9.1. 3
Non-metallic and composite cable ties are considered to be resistant to the effects of vibration, ref. 9.1. 4
According to DNV Rules Pt4 Ch8 Sec 3 D103 b) Electrical equipment shall be constructed of at least flame retardant material. Due to limited amount of material, this test is voluntary for cable ties. 5
According to DNV Rules Pt4 Ch8 Sec 3 D103 a) Electrical equipment shall be constructed of durable non-hygroscopic materials which are not subject to deterioration in the atmosphere to which it is likely to be exposed.
3.Declaration form for cable ties according to IEC 62275 classification: Manufacturer: ____________________________________________________ Family of cable ties: ___________________________________________________
Classification
according to IEC
62275:
Options: Please fill in: 6.1 Material: Metallic, Non-metallic or composite
6.2 Loop tensile strength: According to Table 2 Info to be given in
data sheets.
6.2.1 Type 1: Retains 50 % strength after testing, OR
6.2.2 Type 2: Retains 100 % strength after testing
Maximum operation temperature, ref. Table 3 [ºC]
Minimum operation temperature, ref. Table 4 [ºC] 6.3 Temperature:
Minimum installation temperature. [ºC]
6.4 Contribution to fire: For non-metallic or composite cable ties: Considered to
cause minimal contribution to fire due to small amount
of material. Metallic cable ties are considered
non-flame propagating.
Not necessary to
declare
6.5.1 Resistance to
UV light:
Either resistant to UV light or Not declared
(If not UV resistant, an application limitation ‘Not to be
used on open deck’ will be added)
6.5.2 Resistance to corrosion: Either resistant to corrosion or Not declared Only corrosion
resistant cable ties
can be DNV type
approved
Date: ____________________ Signature: ________________________________。