nes 868 requirements for the design of centre feed hose reels - category 2

Requirements for the Design of Centre FeedHose Reels

Ministry of Defence Defence Standard 02-868

Issue 1 Publication Date 19 October 2001

Category 2

AMENDMENTS ISSUED SINCE PUBLICATION

AMD NO DATE OFISSUE

TEXT AFFECTED SIGNATURE &DATE

Revision Note

This is the first Issue of this Standard.

Historical Record

This is the first Issue of this Standard.

(i)

DEFENCE STANDARD 02868 (NES 868)

REQUIREMENTS FOR THE DESIGN OF CENTRE FEED HOSE REELS

ISSUE 1

This Defence Standard is

authorized for use in MOD contracts

by the Defence Procurement Agency and

the Defence Logistics Organization

Published by:

UK Defence StandardizationDefence Procurement AgencyAn Executive Agency of the Ministry of DefenceDirectorate of StandardizationKentigern House65 Brown StreetGlasgow G2 8EX

DEF STAN 02868 ISSUE 1(NES 868)

(ii)


(iii)

SCOPE

1. This Defence Standard specifies the minimum design requirements for 25mm nominal bore(NB) Centre Feed Hose Reel Units for use on HM Ships or Submarines as a first line applianceagainst Class A & B fires.


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(v)

FOREWORDSponsorship

1. This Defence Standard (NES) is sponsored by the Defence Logistics Organisation (DLO),Ministry of Defence (MOD).

2. Any user of this standard either within MOD or in industry may propose an amendment toit. Proposals for amendments that are not directly applicable to a particular contract are tobe made to the publishing authority identified on Page (i), and those directly applicable to aparticular contract are to be dealt with using contracts procedures.

3. If it is found to be unsuitable for any particular requirement, MOD is to be informed in writingof the circumstances.

4. No alteration is to be made to this standard except by the issue of an authorized amendment.

5. Unless otherwise stated, reference in this standard to approval, approved, authorized andsimilar terms means by the MOD in writing.

6. Any significant amendments that may be made to this standard at a later date will be indicatedby a vertical sideline. Deletions will be indicated by 000 appearing at the end of the lineinterval.

Conditions of ReleaseGeneral

7. This standard has been devised solely for the use of the MOD, and its contractors in theexecution of contracts for the MOD. To the extent permitted by law, the MOD hereby excludesall liability whatsoever and howsoever arising (including but without limitation, liabilityresulting from negligence) for any loss or damage however caused when the standard is usedfor any other purpose.

8. This document is Crown Copyright and the information herein may be subject to Crown orthird party rights. It is not to be released, reproduced or published without written permissionof the MOD.

9. The Crown reserves the right to amend or modify the contents of this standard withoutconsulting or informing any holder.

MOD Tender or Contract Process10. This standard is the property of the Crown. Unless otherwise authorized in writing by the

MOD it must be returned on completion of the contract, or submission of the tender, inconnection with which it is issued.

11. When this standard is used in connection with a MOD tender or contract, the user is to ensurethat he is in possession of the appropriate version of each document, including relateddocuments, relevant to each particular tender or contract. Enquiries in this connection maybe made to the authority named in the tender or contract.

12. When standard are incorporated into MOD contracts, users are responsible for their correctapplication and for complying with contractual and any other statutory requirements.Compliance with an standard does not of itself confer immunity from legal obligations.


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Categories of Naval Defence Standards13. The Category of this standard has been determined using the following criteria:

a. Category 1. If not applied may have a Critical affect on the following:

Safety of the vessel, its complement or third parties.

Operational performance of the vessel, its systems or equipment.

b. Category 2. If not applied may have a Significant affect on the following:

Safety of the vessel, its complement or third parties.

Operational performance of the vessel, its systems or equipment.

Through life costs and support.

c. Category 3. If not applied may have a Minor affect on the following:

MOD best practice and fleet commonality.

Corporate Experience and Knowledge.

Current support practice.

Related Documents14. In the tender and procurement processes the related documents listed in each section and

Annex A can be obtained as follows:

a. British Standards British Standards Institution,389 Chiswick High Road,London, W4 4AL.

b. Defence Standards Defence Procurement Agency,An Executive Agency of the Ministry of Defence,Directorate of Standardization,Kentigern House,65 Brown Street,Glasgow, G2 8EX.

c. Other documents Tender or Contract Sponsor to advise.

15. All applications to MOD for related documents are to quote the relevant MOD Invitation toTender or Contract number and date, together with the Sponsoring Directorate and theTender or Contract Sponsor.

16. Prime Contractors are responsible for supplying their subcontractors with relevantdocumentation, including specifications, standards and drawings.

Health and SafetyWarning

17. This standard may call for the use of processes, substances and/or procedures that areinjurious to health if adequate precautions are not taken. It refers only to technical suitabilityand in no way absolves either the supplier or the user from statutory obligations relating tohealth and safety at any stage of manufacture or use. Where attention is drawn to hazards,those quoted may not necessarily be exhaustive.

18. This standard has been written, and is to be used, taking into account the policy stipulatedin JSP430 MOD Ship Safety Management System Handbook.

Additional Information(There is no relevant information included)


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CONTENTSPage No

TITLE PAGE (i). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCOPE (iii). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FOREWORD (v). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sponsorship (v). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Conditions of Release (v). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Related Documents (vi). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Health and Safety (vi). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CONTENTS (vii). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 1. PERFORMANCE SPECIFICATION 1.1. . . . . . . . . . . 1.1 Environment 1.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1.1 Shock 1.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1.2 Environmental Conditions 1.1. . . . . . . . . . . . . . . . . . . . 1.2 General Requirements 1.1. . . . . . . . . . . . . . . . . . . . . . . . Figure 1.1 Foam/Water Hosereel Assembly 1.3. . . . . . . . . . . . . . . . 1.3 Inductor Unit Assembly 1.4. . . . . . . . . . . . . . . . . . . . . . . 1.4 Centre Feed Hose Reel Assembly 1.5. . . . . . . . . . . . . . . 1.5 Constant Flow Spray/Jet Nozzle Assembly 1.6. . . . . . .

SECTION 2. NATIONAL/INTERNATIONAL REGULATIONS 2.12.1 General Requirements 2.1. . . . . . . . . . . . . . . . . . . . . . . .

SECTION 3. MILITARY STANDARDS/REQUIREMENTS 3.1. . . . 3.1 General Requirements 3.1. . . . . . . . . . . . . . . . . . . . . . . .

SECTION 4. DESIGN REQUIREMENTS/GUIDANCE 4.1. . . . . . . 4.1 Environment 4.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1.1 Environmental Conditions 4.1. . . . . . . . . . . . . . . . . . . . 4.2 General Requirements 4.1. . . . . . . . . . . . . . . . . . . . . . . . 4.3 Centre Feed Hose Reel Assembly 4.1. . . . . . . . . . . . . . . 4.4 Operation 4.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 5. CORPORATE EXPERIENCE & KNOWLEDGE 5.1.

ANNEX A. RELATED DOCUMENTS A.1. . . . . . . . . . . . . . . . . . . .

ANNEX B. ABBREVIATIONS AND DEFINITIONS B.1. . . . . . . .

ANNEX C. PROCUREMENT CHECK LIST C.1. . . . . . . . . . . . . .

ALPHABETICAL INDEX INDEX.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


(viii)


1.1

1. PERFORMANCE SPECIFICATION

Related Documents: BS 1490, NES 719, BR 8470; see also Annex A.

1.1 Environment

1.1.1 Shock

a. For the purpose of this NES the hose reel is to be capable of remainingserviceable in a shock environment to Grade C (Revised) for conditions ofenvironmental shock (see BR 8470), with the pivot axis mounted in either thevertical or horizontal plane.

b. The design of hose reels is to be such that when in the stowed position, the hoseand associated nozzle are to remain on the drum of the reel when subjected tothe maximum level of acceleration and deceleration specified in Clause 1.1.1a.without the aid of clips or restraining straps.

1.1.2 Environmental Conditions (See also Design Requirements/Guidance)

a. The hose reel unit is to be capable of operating effectively within therequirements for sea water systems specified in NES 719.

b. Only nonmagnetic materials compatible for use with sea water are to beemployed. A suitable strainer is to be included on the inlet side to prevent theingress of debris from the ships sea water system such that the performanceof the hose reel is not degraded.

1.2 General Requirements (See also National/International Regulations)

a. The hose reel units are to be suitable for use in surface ships, submarines andRN fire schools. They are to be provided with an autonomous induction unitand must be capable of delivering either a foam solution or water in spray orjet form. (See also Design Requirements/Guidance.)

b. Each Hose Reel Unit is to be designed to provide a combination of water orwater and foam discharge throughout a range from foam jet to spray and backagain. The general arrangement is shown in Figure 1.1 which consists of thefollowing:

(1) Inductor Unit;

(2) Hose reel Assembly;

(3) Spray/Jet Nozzle Assembly.

c. Each unit is to be supplied with sea water at pressures up to a maximum of 7 barat the inlet. It is to provide a supply of not less than 90 litres per minute at thenozzle and be capable of inducing Aqueous Film Forming Foam (AFFF)concentrate at 6% 10% from portable AFFF storage containers.

d. Each hose reel is to be capable of multidirectional rotation. There is to beadequate protection to ensure that the hose is not damaged or kinked whilebeing wound on to the drum.

e. The hose is to pass through an annulus bracket mounted in a position whichwill allow the hose to be deployed easily in all directions, normally directlybelow the hose take off from the reel as detailed at Figure 1.1.


1.2

f. The hose is to be fitted with a suitable nozzle incorporating a pistol grip to givethe operator complete control during fire fighting operations. The nozzle is todeliver both a spray and jet discharge pattern, controlled by a 90 rotationalaction of the nozzle. The rotational action is to be operated with ease by anoperator wearing Fearnought protective gloves or mittens.

g. Under normal conditions the Spray/Jet Nozzle is to be stowed in a purposedesigned, bulkheadmounted cradle. The Inductor Unit is to be capable of beingmounted vertically or horizontally to suit availability of space.

DEF STA

N 02868 ISSU

E 1(NES 868)

1.3

Spray/Jet Nozzle

Delivery Hose

Annulus Bracket

Hosereel Assembly

Centre Feed Hose Reel Assembly

Inductor/ StrainerUnit

P

Pressure Gauge (0 to 10 bar)25 mm (nominal bore) Hose

Pickup Hose

AFFF Pickup Tube

NonReturn ValveFrom Sea Water System

Sea Water SystemIsolation Valve

AFFF 20 litre Containers

Figure 1.1 Foam/W

ater Hose R

eel Assem

bly


1.4

1.3 Inductor Unit Assembly

a. The Inductor Unit Assembly is to meet the following requirements:

(1) Total Flow Rate (nominal) 90 litres per minute at 7 bar;

(2) Operating Pressure (nominal) 7 bar (minimum 3.5 bar);

(3) Overall Dimensions Not to exceed:500mm long250mm high120mm deep;

(4) Weight Not to exceed 10kg;

(5) Foam Liquid Type 6% AFFF.

b. The assembly is to consist of a suitable back plate on which are mounted thefollowing components:

(1) 1 off : Foam Liquid Inductor;

(2) 1 off : Foam Liquid Pickup Tube, and a means of stowing the pickup tube to avoid damage when not in use;

(3) 1 off : 0 to 10 bar Inlet Pressure Gauge.

c. The back plate is to be fitted with four mounting bushes, drilled to provideclearance holes for 10mm diameter bolts.

d. A suitable strainer is to be incorporated to ensure that only clean sea water isdelivered to the fire fighting equipment.

e. The Foam Liquid Inductor (FLI) is to be fitted with a 0 to 10 bar Pressure Gaugeto measure inlet pressure and is to be calibrated to induce liquid AFFF at 6% 10% concentrate. The FLI is to be easily removable for cleaning purposes.

f. The AFFF liquid is to be induced by means of a pickup tube assembly from 20litre AFFF containers.

g. There is to be a suitable nonreturn valve to ensure that the Foam Liquid canbe drawn up from the storage container into the water stream withoutinterruption. Should the Foam mode then be switched to the wateronly mode,the design must prevent sea water entering the Liquid Foam containers.

h. The discharge outlet of the Inductor Unit Assembly is to be connected to thehosereel by a suitable flexible 25mm Nominal Bore (NB) hose.

i. The Inductor Unit Assembly is to be capable of being mounted both verticallyor horizontally. Labels giving clear, concise, readily comprehended operatinginstructions for the unit are to be provided, and are to be suitable for mountingin the vertical or horizontal mode.

j. The Inductor pipework is to be attached to the back plate with stainless steelfasteners. Suitable arrangements are to be made to allow stowage of the pickuptube when not in use.


1.5

1.4 Centre Feed Hose Reel Assembly

a. The Centre Feed Hose reel Assembly is to meet the following requirements:

(1) Overall Dimensions not to exceed:

surface ships andsubmarines } 760mm diameter 234mm deep

(2) Weight: unladen: not to exceed 55kg,

laden: not to be greater than 75kg;

(3) Hose: suitable 25mm NB in lengths of:

surface ships : 30m long,

submarines : 30m long,

minor war vessels : 10m long;

minimum bend radius no less than 184mm.

(4) Mounting Details: 4 off10mm diameter bolts;

(5) Materials: to be compatible with sea water and suitable forRoyal Naval service.

b. The mounting hub is to have an integral flange to facilitate attachment to abulkhead location. The hose drum is to be capable of rotating freely about thishub, held in place with a suitable retaining plate.

c. The centre feed assembly is to consist of a 25mm NB inlet pipe which enters themounting hub behind the hose reel. The hose reel is to be attached to the outletof the inductor by a suitable length of 25mm NB hose.

d. The hose reel assembly is to comprise two discs each consisting of an outer rimsupported by spokes radiating from a central hub. (See also DesignRequirements/Guidance.)

e. Each hose reel is to run on robust sealed bearings which are to be accessiblethrough the retaining plate.


1.6

1.5 Constant Flow Spray/Jet Nozzle Assemblya. The Spray/Jet Nozzle assembly is to meet the following requirements:

(1) Dimensions (approx) : to be easily operable by one operator;

(2) Weight : not to exceed 2kg;

(3) Normal flow : 90 litres per minute at 7 bar;

(4) Jet Length (min) : 15m at 1.75 bar.

b. The Spray/Jet Nozzle Assembly is to connect to the free end of the dischargehose on the hose reel.

c. The body should, wherever possible, be made of aluminium alloy (to BS 1490)and include a pistol type hand grip and a builtin valve spindle to turn thesupply ON and OFF.

d. An operating handle, capable of being operated by a Fearnought gloved hand,is to be positioned over the nozzle body and attached to either end of the valvespindle. The ON/OFF positions are to be clearly marked.

e. The discharge end of the nozzle is to be fitted with a means to easily/readilychange the discharge pattern from a straight jet to a 120 wide spray. Thechange from jet to spray, capable of being operated by a Fearnought glovedhand, is to be executed by a movement no greater than 90. The nozzle is to becapable of being flushed in situ, although inadvertent flushing must not bepossible.

f. The fitting is to have sufficient inherent stiffness to prevent the desired settingfrom becoming inadvertently disengaged. It is also to be clearly labelled to showthe words JET and SPRAY.

g. The nozzle unit is to be sufficiently robust to allow its survival without defectif dropped or struck against a solid object.


2.1

2. NATIONAL/INTERNATIONAL REGULATIONS

Related Documents: Merchant Shipping (Fire Appliances) Regulations; see alsoAnnex A.

2.1 General Requirements

a. The manufacturer is to ensure that there are no conflicts with the Departmentof Trade (DOT) rules and as such the hose reel units are to be accompanied bya valid DOT Certificate of Inspection and Test to certify the acceptability ofthe units for purpose of the Merchant Shipping (Fire Appliances) Regulations.

b. Materials which constitute a fire hazard or can emit toxic fumes are not to beused without prior written approval and must comply with the latest COSHHregulations and meet the requirements of BR 1326A Toxicity guide forSubmarine applications.


2.2


3.1

3. MILITARY STANDARDS/REQUIREMENTS3.1 General Requirements (See also National/International Regulations)

a. The hose reel units are to be suitable for use in surface ships, submarines andRN fire schools. They are to be provided with an autonomous induction unitand must be capable of delivering either a foam solution or water in spray or jetform.


3.2


4.1

4. DESIGN REQUIREMENTS/GUIDANCERelated Documents: NES 1004; see also Annex A.

4.1 Environment

4.1.1 Environmental Conditions (See also Performance Specification)

a. The environmental conditions in which the hose reel is to operate must take intoaccount the requirements of NES 1004.

4.2 General Requirements (See also Performance Specification)

a. The hose reel units are to be designed to maximize reliability and to ensure thatmaintenance requirements are kept to a minimum.

4.3 Centre Feed Hosereel Assembly

a. The hose reel assembly is to be of lightweight construction yet strong enoughto withstand normal service operation and any stress induced by shock.

4.4 Operation

a. The hose reel assemblies are to be inherently simple to operate, and are torequire no tools, mechanical devices or other aids to deploy the hose or operatethe Inductor Unit. For operational effectiveness it is recommended that twooperators be used, the hose reel shall be capable of being operated by operator(s)wearing Fearnought gloves, sharing the duties as follows.

(1) No 1 Operator: Hose deployment and Nozzle Function;

(2) No 2 Operator: Operate Isolating Valve and Inductor Unit/AFFF Function from a position at the Centre Feed Hose ReelUnit.


4.2


5.1

5. CORPORATE EXPERIENCE & KNOWLEDGE

This NES contains no Corporate Experience & Knowledge information.


5.2


ANNEX AA.1

ANNEX A.

RELATED DOCUMENTS

A.1 The following documents and publications are referred to in this NES:

Merchant Shipping (Fire Appliances) Regulations

BS 1490 Specification for Aluminium Alloy Ingots and Castings for GeneralEngineering Purposes

NES 719 Sea Water Systems for HM Surface Ships

NES 1004 Requirements for the Design and Testing of Equipment to MeetEnvironmental Conditions

BR 8470 Shock Manual (metric)


ANNEX A A.2


ANNEX BB.1

ANNEX B.

ABBREVIATIONS AND DEFINITIONS

B.1 For the purpose of this NES the following abbreviations apply:

AFFF Aqueous Film Forming Foam (6%)

DOT Department of Trade

FLI Foam Liquid Inductor

MOD Ministry of Defence

NB nominal bore

NES Naval Engineering Standard

RN Royal Navy

B.2 For the purpose of this NES the following definitions apply:

Annulus Bracket A bracket which, when secured to the bulkhead, allows the hoseto be pulled from the reel in any direction.

Inductor Unit An assembly which allows the mixing of AFFF and sea water togive a 6%10% mix of AFFF/water prior to final delivery to thehose reel.


ANNEX B B.2


ANNEX CC.1

ANNEX C.

PROCUREMENT CHECK LISTThis NES contains no Procurement Check List information.


ANNEX C C.2


INDEX.1

ALPHABETICAL INDEX

(Note: Page numbers are given)

AAbbreviations and Definitions, B.1

AFFF, 1.4, 4.1, B.1

Annulus Bracket, 1.1, B.1

CCentre Feed Hose reel Assembly, 1.5

Constant Flow Spray/Jet Nozzle Assembly,1.6

DDischarge Nozzle, 1.2

Discharge Pattern, 1.1

EEnvironment, 1.1, 3.1, 4.1

FFoam Liquid Inductor, 1.4

GGeneral Requirements, 1.1, 3.1, 4.1

HHose, 1.5

Hose reel, 1.5, 1.6, 4.1

IInductor Unit, 1.4, 4.1, B.1

MMagnetic Materials, 1.1

OOperating Pressure, 1.1, 1.4

Operation, 4.1

RRelated Documents, A.1

SScope, (iii)

Shock, 1.1

Strainer, 1.4

WWeight, 1.5


INDEX.2

Inside Rear Cover

Crown Copyright 2001

Copying Only as Agreed with DStan

Defence Standards are Published by and Obtainable from:

Defence Procurement AgencyAn Executive Agency of The Ministry of Defence

Directorate of StandardizationKentigern House65 Brown Street

GLASGOW G2 8EX

DStan Helpdesk

Tel 0141 224 2531/2 Fax 0141 224 2503

Internet e-mail [email protected]

File Reference

The DStan file reference relating to work on this standard is D/DStan/069/02/868.

Contract Requirements

When Defence Standards are incorporated into contracts users are responsible for their correctapplication and for complying with contractual and statutory requirements. Compliance witha Defence Standard does not in itself confer immunity from legal obligations.

Revision of Defence Standards

Defence Standards are revised as necessary by up issue or amendment. It is important thatusers of Defence Standards should ascertain that they are in possession of the latest issue oramendment. Information on all Defence Standards is contained in Def Stan 00-00 Standardsfor Defence Part 3 , Index of Standards for Defence Procurement Section 4 Index of DefenceStandards and Defence Specifications published annually and supplemented regularly byStandards in Defence News (SID News). Any person who, when making use of a DefenceStandard encounters an inaccuracy or ambiguity is requested to notify the Directorate ofStandardization (DStan) without delay in order that the matter may be investigated andappropriate action taken.

CONTENTSSCOPEFOREWORDSponsorshipConditions of ReleaseCategories of Naval Defence StandardsRelated DocumentsHealth and Safety

1. PERFORMANCE SPECIFICATION1.1 Environment1.2 General RequirementsFigure 1.1 Foam/Water Hose Reel Assembly

1.3 Inductor Unit Assembly1.4 Centre Feed Hose Reel Assembly1.5 Constant Flow Spray/Jet Nozzle Assembly

2. NATIONAL/INTERNATIONAL REGULATIONS2.1 General Requirements

3. MILITARY STANDARDS/REQUIREMENTS3.1 General Requirements

4. DESIGN REQUIREMENTS/GUIDANCE4.1 Environment4.2 General Requirements4.3 Centre Feed Hosereel Assembly4.4 Operation

5. CORPORATE EXPERIENCE & KNOWLEDGEANNEX A. RELATED DOCUMENTSANNEX B. ABBREVIATIONS AND DEFINITIONSANNEX C. PROCUREMENT CHECK LISTALPHABETICAL INDEX

nes 868 requirements for the design of centre feed hose reels - category 2

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