1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21986-4 SANS 9093-1:2008 Edition 1 ISO 9093-1:1994 Edition 1SOUTH AFRICAN NATIONAL STANDARD Small craft Seacocks and through-hull fittings
4、 Part 1: Metallic This national standard is the identical implementation of ISO 9093-1:1994, and is adopted with the permission of the International Organization for Standardization. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: +27 12 428 7911
5、 Fax: +27 12 344 1568 www.sabs.co.za SABS This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 9093-1:2008 Edition 1 ISO 9093-1:1994 Edition 1 Table of changes Change No. Date Scope National foreword This South African standard was approved by
6、National Committee SABS TC 188, Small craft, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in September 2008. This standard may only be used and printed by approved subscription and freemailing clie
7、nts of the SABS.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) SANS 9093-1:2008This standa
8、rd may only be used and printed by approved subscription and freemailing clients of the SABS.IS0 9093=1:1994(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards
9、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 on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take pa
10、rt in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Stan
11、dard 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 consists of the following parts, under the general title Small craft - Seacocks and through-hull fittings: - Part 7: Me
12、tallic - 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, electronic or mechanical, Including photocopyrng and microfilm, without permission in writing from the publisher. Internati
13、onal Organization for Standardization Case Postale 56 l CH-1211 Geneve 20 l Switzerland Printed in Switzerland ii SANS 9093-1:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.INTERNATIONAL STANDARD 0 Iso IS0 9093-I : 1994(E) Small craft - Se
14、acocks and through-hull fittings - Part 1: Metallic 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 len
15、gth of hull. Through-hull fittings for other purposes 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
16、, 3/8 in, l/2 in, 3/4 in, 1 in, 1 l/4 in, 1 l/2 in, 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 limit
17、ing the interchangeability of these parts. 2 Normative 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, an
18、d parties to agreements based on this part of IS0 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 pressur
19、e-tight joints are made on the threads - Part 7: Dimensions, 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
20、 definitions apply. 3.1 through-hull fitting: Any 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 fitt
21、ing which, within a service time of five years, does 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
22、of five years does not display any defect that will 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 plac
23、es intended for storage of portable equipment such as lockers, drawers or shelves. SANS 9093-1:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.IS0 9093-I : 1994(E) 0 IS0 4 Corrosion resistance 4.1 Selection of materials The materials used s
24、hall 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; waste water from toilet systems or holding tanks). 4.2 Material combinations The combin
25、ation 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 intended. 4.3 Corrosion prevention Materials that have no adequate corrosion resist
26、ance 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 materials they fasten in a way that the strength of the through-hull fittings or its
27、 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 fittings covered by this part of IS0 9093 are given in table 1. Other sol- utions are acce
28、ptable 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 shall have a mechanical strength in excess of the hull itself. 5.3 Detail design r
29、equirements 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 fitted), the mimimum remaining thread length shall be at least I,5 times the necessa
30、ry 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 fitting. 5.3.2 Flange diameter The diameter of the flange shall not be less than that of
31、 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 seacock shall be so designed as to permit - positive operation under any condition
32、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 connection that cannot be dislodged The minimum threaded length of the attachment of th
33、rough-hull fittings, hose fittings and other connect- ing parts shall comply with table 2 (see also figure I). SANS 9093-1:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.IS0 9093=1:1994(E) Table 1 - Examples of through-hull fittings Fittin
34、gs with a flange outside and a flanged nut inside, with the stem threaded, where tightness 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 faste
35、ned to the hull by screws with nuts, or screws with nuts and an internal flange. screws WI SANS 9093-1:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.IS0 9093-l : 1994(E) 0 IS0 Table 2 - Seacock minimum thread lengths Nominal diameter, Min
36、imum 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 discharge line shall be sufficient to allow for easy o
37、peration. 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 requirements The hose fitting end may show the followin
38、g 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 sizes 1 in and below; 35 mm for nominal sizes 1 l/
39、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 (motorboats) above the static waterline in the fully l
40、oaded 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 tension shall not be used. Clamps shall be faste
41、ned to the plain or serrated end of the stem. 4 SANS 9093-1:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.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 Wate
42、r scoops and outboard water strainers Water intake connections may be fitted with outboard strainers and/or water scoops. 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 ca
43、nnot be compressed when tightening the through-hull fitting, or the area around the fitting shall be built in single skin 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
44、 normal operat- ing conditions. 9 Installation 9.3 Seacocks shall be readily accessible. 9.1 Where the fitting of a seacock 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 pl
45、astics hulls built in sandwich con- struction, the core material shall be replaced by a 9.4 Seacocks shall be securely 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. SANS 9093-1:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.
