Ships and marine technology -- Drainage systems on ships and marine structures

ISO 15749-4:2004 applies to the design of sewage disposal pipes within the framework of sanitary drainage on ships and marine structures. For planning and basic requirements, see ISO 15749-1:2004.

Navires et technologie maritime -- Installations de drainage sur navires et structures maritimes

General Information

Status
Published
Publication Date
15-Jun-2004
Current Stage
6060 - International Standard published
Start Date
06-May-2004
Completion Date
16-Jun-2004
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ISO 15749-4:2004 - Ships and marine technology -- Drainage systems on ships and marine structures
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INTERNATIONAL ISO
STANDARD 15749-4
First edition
2004-06-15
Ships and marine technology — Drainage
systems on ships and marine
structures —
Part 4:
Sanitary drainage, sewage disposal pipes
Navires et technologie maritime — Installations de drainage sur navires
et structures maritimes —
Partie 4: Drainage sanitaire, tuyaux d'évacuation des eaux usées
Reference number
ISO 15749-4:2004(E)
ISO 2004
---------------------- Page: 1 ----------------------
ISO 15749-4:2004(E)
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© ISO 2004

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ii © ISO 2004 – All rights reserved
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ISO 15749-4:2004(E)
Contents Page

Foreword............................................................................................................................................................ iv

1 Scope...................................................................................................................................................... 1

2 Normative references ........................................................................................................................... 1

3 Terms and definitions........................................................................................................................... 1

4 Disposal ................................................................................................................................................. 2

5 Wastewater outlets ............................................................................................................................. 13

6 Pipework .............................................................................................................................................. 14

Bibliography ..................................................................................................................................................... 15

© ISO 2004 – All rights reserved iii
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ISO 15749-4:2004(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies

(ISO member bodies). The work of preparing International Standards is normally carried out through ISO

technical committees. Each member body interested in a subject for which a technical committee has been

established has the right to be represented on that committee. International organizations, governmental and

non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the

International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

adopted by the technical committees are circulated to the member bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 15749-4 was prepared by Technical Committee ISO/TC 8, Ships and marine techology, Subcommittee

SC 3, Piping and machinery.

ISO 15749 consists of the following parts, under the general title Ships and marine technology — Drainage

systems on ships and marine structures:
 Part 1: Sanitary drainage-system design
 Part 2: Sanitary drainage, drain piping for gravity systems
 Part 3: Sanitary drainage, drain piping for vacuum systems
 Part 4: Sanitary drainage, sewage disposal pipes
 Part 5: Drainage of decks, cargo spaces and swimming pools
iv © ISO 2004 – All rights reserved
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INTERNATIONAL STANDARD ISO 15749-4:2004(E)
Ships and marine technology — Drainage systems on ships
and marine structures —
Part 4:
Sanitary drainage, sewage disposal pipes
1 Scope

This part of ISO 15749 applies to the design of sewage disposal pipes within the framework of sanitary

drainage on ships and marine structures.
For planning and basic requirements, see ISO 15749-1.
2 Normative references

The following referenced documents are indispensable for the application 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 4200, Plain end steel tubes, welded and seamless — General tables of dimensions and masses per unit

length

ISO 9329-1, Seamless steel tubes for pressure purposes — Technical delivery conditions — Part 1: Unalloyed

steels with specified room temperature properties

ISO 9330-1, Welded steel tubes for pressure purposes — Technical delivery conditions — Part 1: Unalloyed

steel tubes with specified room temperature properties

ISO 15749-1, Ships and marine technology — Drainage systems on ships and marine structures —

Part 1: Sanitary drainage-system design

ISO 15749-5, Ships and marine technology — Drainage systems on ships and marine structures —

Part 5: Drainage of decks, cargo spaces and swimming pools
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 15749-1 apply.

© ISO 2004 – All rights reserved 1
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ISO 15749-4:2004(E)
4 Disposal
4.1 General

For the disposal of wastewater from sanitary drainage systems, a distinction is made between:

 overboard wastewater disposal via a wastewater storage unit and disposal pipes overboard or to a

connection from where it is transferred to an external disposal point (see 4.2);

NOTE Wastewater storage units according to this part of ISO 15749 are collector tanks, sewage treatment plants, or

vacuum generating units for the respective facilities
 discharge directly overboard via gravity drain lines (see 4.4).
4.2 Disposal points with storage units
4.2.1 Disposal piping system

Disposal lines from storage units to disposal points shall be designed as pressure lines; for details see

Figure 1.

Figure 1 shows a simplified example of routing of disposal lines within the framework of a sanitary drainage

system, leading from the storage unit (e.g. collector tank, sewage treatment plant) to the disposal points.

4.2.2 Discharge over the side
4.2.2.1 Closing devices

As closing devices, fittings shall be installed in the disposal piping section between the wastewater pump and

the wastewater outlet (piping section Z); see Figure 2. Closing devices shall be certified by the classification

societies.

The arrangement, number, and type of fittings depends on the vertical distance from the summer

loadline/bulkhead deck of the lowest opening (drain).

NOTE Such openings (drains) also include, for example, emergency overflows of sewage treatment plants or

openings for dosing of chemicals.
4.2.2.2 Drains

4.2.2.2.1 In the disposal pipe, a screw-down non-return valve shall be installed at the shell. If it is not

possible to place the shutoff fitting directly at the shell, the pipe from the shell to the shutoff fitting has to be

designed thick-walled, see 6.1 and Figure 3.
2 © ISO 2004 – All rights reserved
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ISO 15749-4:2004(E)
Key
1 sewage treatment plant, collector tank or vacuum 9 funnel
generating unit for these installations
10 cargo space
2 disposal pipe
11 bridge
3 valve
12 4 superstructure deck
4 wastewater pump
13 3 superstructure deck
5 non-return valve
14 2 superstructure deck
6 vent line
15 1 superstructure deck
7 wastewater outlet in the shell
16 freeboard/bulkhead deck
8 international wastewater shore connection
(MARPOL-flange)
Wastewater from accommodation areas and service
spaces.

Figure 1 — Example of a sewage disposal system with storage unit upstream of the discharge point

© ISO 2004 – All rights reserved 3
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ISO 15749-4:2004(E)
Key
1 drain line
2 storage unit (e.g. collector tank or sewage treatment plant)
3 sewage disposal pipe
4 pump
5 wastewater outlet
6 shell
7 piping section Z
Figure 2 — Piping section Z
Dimensions in millimetres
Key
1 wastewater storage unit
2 freeboard deck
Figure 3 — Example to 4.2.2.2.1
4 © ISO 2004 – All rights reserved
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ISO 15749-4:2004(E)

4.2.2.2.2 When, in the case of a 5° list of the ship to port or starboard, the lowest inner opening of the

drainage system is less than 200 mm above the summer load line, then a further non-return fitting shall be

provided in the suction or pressure line of wastewater pumps of wastewater tanks or sewage treatment plants

(see Figure 4).
Dimensions in millimetres
Key
1 wastewater storage unit
2 freeboard deck
3 to be installed upstream or downstream of the pump
Figure 4 — Example to 4.2.2.2.2

4.2.2.2.3 A pipe loop can be applied as a second non-return fitting, provided that its crest overflow is at

least 200 mm above the waterline with the ship on summer loadline draft and when the ship has a 5° list (see

Figure 5).
Dimensions in millimetres
Key
1 wastewater unit
2 freeboard deck
Figure 5 — Example to 4.2.2.2.3
© ISO 2004 – All rights reserved 5
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ISO 15749-4:2004(E)

4.2.2.2.4 When, in the case of a 5° list of the ship loaded to the summer loadline, the deepest inner

opening of the drainage system lies on the waterline or lower, a gate valve at the outlet of the pipe at the shell

shall be provided in addition to the second non-return fitting mentioned in 4.2.2.2.2. In this case, the non-

return valve need not be provided with a means of closing (see Figure 6).
Key
1 storage unit or sewage treatment plant
2 freeboard deck
Figure 6 — Example to 4.2.2.2.4

4.2.2.2.5 When, on passenger ships, the deepest inner opening of the wastewater sy

...

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