ISO 24316:2022

INTERNATIONAL ISO
STANDARD 24316
First edition
2022-07
Ships and marine technology —
Design and test requirements for steel
doors using electrical trace heating
Reference number
© ISO 2022
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Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Design . 2
4.1 Opening direction . 2
4.2 Structure . 2
4.2.1 Types of heated steel doors . 2
4.2.2 Sealing rubber stripe . 4
4.3 Performance . 5
4.3.1 Weather-tightness . 5
4.3.2 Anti-icing . 5
5 Materials . 5
5.1 Steel door . 5
5.2 Trace heater cable . 6
6 Quality of manufacture .6
6.1 Appearance . 6
6.2 Anti-rust and surface treatment . . 6
6.3 Installation of trace heater cable. 6
7 Test . 7
7.1 Weather-tight test . 7
7.1.1 Indentation test . 7
7.1.2 Flushing test . 7
7.2 Anti-icing test . 7
7.2.1 Test purpose . 7
7.2.2 Test device . 7
7.2.3 Test condition . 7
7.2.4 Test procedure. 8
7.2.5 Pass/fail criteria . 9
8 Designation . 9
Annex A (informative) Nominal dimension and installation position of heated steel door .10
Annex B (informative) Type selection for trace heater cable and layout of trace heating
device .11
Bibliography .13
iii
Foreword
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iv
INTERNATIONAL STANDARD ISO 24316:2022(E)
Ships and marine technology — Design and test
requirements for steel doors using electrical trace heating
1 Scope
This document specifies the design, materials, quality of manufacture, test and designation of electrical
trace heating for steel doors onboard vessels sailing in a low temperature environment (below −10 °C).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 8501-1, Preparation of steel substrates before application of paints and related products — Visual
assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel substrates
and of steel substrates after overall removal of previous coatings
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
heated steel door
door made of steel installed onboard vessels sailing in a low temperature environment (3.4) enabling
people to open normally by adding heat through the trace heater cable (3.3)
3.2
trace heater
device designed for the purpose of producing heat on the principle of electrical resistance and typically
composed of one or more metallic conductors or an electrically conductive material, suitably electrically
insulated and protected
Note 1 to entry: This can be in the form of a trace heater cable (3.3), heater panel or heated pad.
[SOURCE: IEC 60519-10:2013, 3.115]
3.3
trace heater cable
circular to flattened cable shaped construction with one or more discrete or continuous electrically
insulated heating elements
Note 1 to entry: This cable is able to self-regulate its heating output power due to ambient temperature.
[SOURCE: IEC 60519-10:2013, 3.116]
3.4
low temperature environment
water with the lowest mean daily low temperature below −10 °C, such as the Arctic Ocean, St. Francis
Bay, North Baltic, Okhotsk, Bohai and North Yellow Sea
Note 1 to entry: In general, these waters are covered by regional sea ice during winter.
[SOURCE: IMO MSC.385 (94), 1.2.12, modified]
4 Design
4.1 Opening direction
[1]
Depending on the opening direction , heated steel doors shall be classified into the following two
types (see Figure 1):
a) Type L: left-hand heated steel door (the hinge stays left when the door opens towards the observer);
b) Type R: right-hand heated steel door (the hinge stays right when the door opens towards the
observer).
Type L Type R
Key
1 hinge
L left-hand
R right-hand
Figure 1 — Opening direction
4.2 Structure
4.2.1 Types of heated steel doors
The heated steel doors are classified into three types, as shown in Table 1, Figure 2 and Figure 3.
Table 1 — Types of heated steel doors
Type Definition
M heated steel door whose locking mode is multi-buckle open
H heated steel door whose locking mode is single handle linkage open
W heated steel door whose locking mode is hand wheel linkage open
Key
1 door plate 6 sleeve
2 sealing rubber stripe 7 thermal insulation
...