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1、INTERNATIONAL STANDARD IS0 9093-l Fitrst edition 1994-12-15 Small craft - Seacocks and through-hull fittings - Part 1: Metallic Navires de plaisance - Vannes de coque et passe-coques - Partie 7: Construction m6tallique Reference number IS0 9093-I : 1994(E) Copyright International Organization for St
2、andardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 02:25:03 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 9093=1:1994(E) Foreword IS0 (the International Organization for Standardization) is a
3、worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented
4、 on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards ado
5、pted 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. International Standard IS0 9093-I was prepared by Technical Committee lSO/TC 188, Small craft. IS0 9093 co
6、nsists of the following parts, under the general title Small craft - Seacocks and through-hull fittings: - Part 7: Metallic - Part 2: Non-metallic 0 IS0 1994 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electr
7、onic or mechanical, Including photocopyrng and microfilm, without permission in writing from the publisher. International Organization for Standardization Case Postale 56 l CH-1211 Geneve 20 l Switzerland Printed in Switzerland ii Copyright International Organization for Standardization Provided by
8、IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 02:25:03 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD 0 Iso IS0 9093-I : 1994(E) Small craft - Seacocks and through-hull fittings - Part 1: Metalli
9、c 1 Scope This part of IS0 9093 specifies requirements for metallic through-hull fittings, seacocks and hose fit- tings that specifically form part of water intake and discharge lines, and for wet exhaust outlets used in small craft of up to 24 m length of hull. Through-hull fittings for other purpo
10、ses are not covered. This part of IS0 9093 applies to seacocks and through-hull fittings with cylindrical pipe threads in accordance with IS0 228-1, and with joints for conical pipe threads in accordance with IS0 7-1, with nominal diameters of l/4 in, 3/8 in, l/2 in, 3/4 in, 1 in, 1 l/4 in, 1 l/2 in
11、, 2 in, 2 l/2 in, 3 in or 4 in. NOTE 1 The reasons for developing this part of IS0 9093 are that detail dimensions of components of water intake and discharge lines, and wet exhaust outlets passing through a craft hull differ considerably, thus limiting the interchangeability of these parts. 2 Norma
12、tive references The following standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 9093. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of IS0
13、9093 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 7-l : 1994, Pipe threads where pressure-tight joints are made on the threads - Part 7: D
14、imensions, tolerances and designation. IS0 228-l : 1994, Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimen- sions, tolerances and designation. 3 Definitions For the purposes of this part of IS0 9093, the follow- ing definitions apply. 3.1 through-hull fitting: Any
15、fitting designed to permit passage of liquids or gases through the hull. 3.2 seacock: Any valve of the ball, cylinder, plug, gate or butterfly type directly fitted to a hull or a through-hull fitting. 3.3 corrosion-resistant: Material used for a fitting which, within a service time of five years, do
16、es not display any defect that will impair tightness, strength or function. 3.4 protection against corrosion: Any metallic or non-metallic sheathing or coating on materials that are not corrosion-resistant such that the fitting within a service time of five years does not display any defect that wil
17、l impair tightness, strength or function. 3.5 readily accessible: Capable of being reached for operation, inspection or maintenance without removal of any craft structure or use of any tools or removal of any item of portable equipment stowed in places intended for storage of portable equipment such
18、 as lockers, drawers or shelves. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 02:25:03 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 9093-I : 1
19、994(E) 0 IS0 4 Corrosion resistance 4.1 Selection of materials The materials used shall be corrosion-resistant or shall have protection against corrosion, taking into account the various and changing media that pass through the fitting (for example fresh, salt or brackish water with impurities; wast
20、e water from toilet systems or holding tanks). 4.2 Material combinations The combination of different materials shall take into consideration the possibility of galvanic action. Ma- terials in contact with each other shall be galvanically compatible and shall not prevent the device from act- ing as
21、intended. 4.3 Corrosion prevention Materials that have no adequate corrosion resistance in the environment they are used in or that will act galvanically with others used in the system may be used if they are isolated. Fastening elements such as screws shall not act galvanically with either of the m
22、aterials they fasten in a way that the strength of the through-hull fittings or its tightness are impaired. Non-ferrous metals other than aluminium alloys shall not be used when aluminium is incorporated in the system. 5 Through-hull fittings for water 5.1 Types Some examples of through-hull fitting
23、s covered by this part of IS0 9093 are given in table 1. Other sol- utions are acceptable if comparable strength and tightness are achieved. by outside forces due to operation of the fitting and components attached to it, e.g. a seacock. The area under and immediately around the through-hull fitting
24、 shall have a mechanical strength in excess of the hull itself. 5.3 Detail design requirements 5.3.1 Stem The stem length shall take into account the varying hull thicknesses, depending on the hull material and construction. The stem length shall be such that after screwing the flange nut down (if f
25、itted), the mimimum remaining thread length shall be at least I,5 times the necessary thread length specified in table2. The wall thickness of the stem shall be such as to ensure that the remaining strength after machining this part is adequate for the torque during installation and use of the fitti
26、ng. 5.3.2 Flange diameter The diameter of the flange shall not be less than that of the flanged nut or counterplate. 5.3.3 Finish The surface of the flange, nut or counterplate shall not present a sharp edge towards the hull. Edges shall be rounded or chamfered. 6 Seacocks - Design requirements The
27、seacock shall be so designed as to permit - positive operation under any condition likely to be encountered under normal service conditions; - a visual check of the open and closed position. 52 . General design requirements The through-hull fitting shall present a secure, lasting and watertight conn
28、ection that cannot be dislodged The minimum threaded length of the attachment of through-hull fittings, hose fittings and other connect- ing parts shall comply with table 2 (see also figure I). Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=N
29、ASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 02:25:03 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 9093=1:1994(E) Table 1 - Examples of through-hull fittings Fittings with a flange outside and a flanged nut inside, with the stem threaded, where tig
30、htness is achieved by screwing the flange down. Fittings as under 1, but with a countersunk outside flange, forming a flat surface with the outside craft hull. Fittings with a flange outside where the flange is fastened to the hull by screws with nuts, or screws with nuts and an internal flange. scr
31、ews WI Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 02:25:03 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 9093-l : 1994(E) 0 IS0 Table 2 - Sea
32、cock minimum thread lengths Nominal diameter, Minimum length of thread D nom Ll in mm G l/4 10 G 318 11 G l/2 12 G 314 13 Gl 16 G 1 l/4 18 G 1 l/2 20 G2 22 G 2 l/2 25 G3 28 G4 30 -I- E _- 2 Q -A- Figure 1 - Seacock The length of the handle and the clear distance be- tween handle and intake and disch
33、arge line shall be sufficient to allow for easy operation. The design of the seacock assembly shall be such as to ensure that no part may come loose even under severe service conditions. Seacocks shall be either directly fitted to the hull or a through-hull fitting. 7 Hose fittings 7.1 Design requir
34、ements The hose fitting end may show the following con- figurations: - ribbed or serrated (all nominal sizes); - plain pipe end with nominal size I l/4 in and above. The clamping length, L (see figure2) shall allow for double clamp fastening of the hose and shall be not less than 25 mm for nominal s
35、izes 1 in and below; 35 mm for nominal sizes 1 l/4 in and above. The end of the hose fitting shall be rounded or chamfered. 7.2 Hose connection Hoses shall be fastened by double clamps where the centreline of the through-hull fitting is lower than 300 mm (sailboats and motorsailers), or 150 mm (moto
36、rboats) above the static waterline in the fully loaded condition. Double clamps shall be fitted in any case if plain pipe ends are used. Metallic hose clamps shall be made of stainless steel, type Cr18 Ni8 or higher corrosion resistance property and they shall be reusable. Clamps depending on spring
37、 tension shall not be used. Clamps shall be fastened to the plain or serrated end of the stem. 4 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 02:25:03 MDTNo reproduction or ne
38、tworking permitted without license from IHS -,-,- IS0 9093-l :1994(E) a) Plain pipe end I/ / c) Ribbed end b) Serrated end Figure 2 - Examples of hose fittings 1 d) Ribbed end 8 Water scoops and outboard water strainers Water intake connections may be fitted with outboard strainers and/or water scoo
39、ps. Where cleaning of the intake piping and through-hull connection cannot be accomplished by other means, outboard strainers and/or water scoops shall be removable. material that cannot be compressed when tightening the through-hull fitting, or the area around the fitting shall be built in single s
40、kin construction with local re- inforcement. 9.2 The attachment of through-hull fittings and seacocks to the hull shall be watertight and so in- stalled as to prevent loosening under normal operat- ing conditions. 9 Installation 9.3 Seacocks shall be readily accessible. 9.1 Where the fitting of a se
41、acock or through-hull fitting impairs the local strength of the hull, a re- inforcement or a backing block shall be installed to compensate for the loss of strength. In reinforced plastics hulls built in sandwich con- struction, the core material shall be replaced by a 9.4 Seacocks shall be securely
42、 fastened to the hull to permit easy operation without damage to the hull structure or to the seacock itself and without de- stroying the watertight integrity or the seacock instal- lation. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA
43、Technical Standards 1/9972545001 Not for Resale, 04/26/2007 02:25:03 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 9093=1:1994(E) KS 47.080.00 Descriptors: shipbuilding, small craft, ship hulls, water pipelines, cocks, valves, fittings, specificattons. Price based on 5 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 02:25:03 MDTNo reproduction or networking permitted without license from IHS -,-,-