1、IINCH-POUNDI MIL-STD-l399(NAVY) SECTION 302A 29 February 1988 SUPERSEDING SECTION 302 20 March 1972 (See 6.3) DOD-STD-l399(NAVY) MILITARY STANDARD INTERFACE STANDARD FOR SHIPBOARD SYSTEMS SECTION 302 WEATHER ENVIRONMENT AMSC N/A FSC 1990 DISTRIBUTION STATEMENT A Approved for public release; distribu
2、tion unlimited Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-l399(NAVY) SECTION 302A 29 February 1988 DEPARTMENT OF THE NAVY NAVAL SEA SYSTEMS COMMAND Washington, DC 20362-5101 Interface Standard for Shipboard Systems, Weather Environment 1
3、. technical development plans, design, and acquisition specifications for new ship acquisitions, ship modernizations or conversions, and systems/equipment for installation therein and into active fleet ships. This Military Standard is approved for use by Commands of the Navy in the 2. Beneficial com
4、ments (recommendations, additions, deletions) and any perti- nent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Document Improve
5、ment Proposal (DD Form 1426) appearing at the end of this document or by letter. ii Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-l399(NAVY) SECTION 302A 29 February 1988 FOREWORD The purpose of this section is to define the standard interf
6、ace requirements for and the constraints on the design of ships/systems/equipment which are exposed to or affected by the weather environmental conditions. iii Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-1399 -302A 19 W 7997733 0030893 O
7、Paragraph 1 . 1.1 1.2 1.3 1.4 2 . 2.1 2.2 3 . 3.1 4 . 5 . 5.1 5.1.1 5.1.2 5.2 5.3 5.3.1 5.3.2 5.3.3 5.3.4 5.3.5 5.3.6 5.3.7 5.3.7.3: 5.3.7.2 5.3.8 6 . 6.1 6.1.1 6.1.2 6.2 6.3 Figure 1 . MIL-STD-I399(NAVY) SECTION 302A 29 February 1988 CONTENTS Page GENERAL. SCOPE. INTERFACE AND APPLICABILITY . 1 Gen
8、eral 1 Scope . 1 Interface 1 Applicability 1 REFERENCED DOCUMENTS 1 Issue of documents . 1 Order of precedence 2 DEFINITIONS . 2 Weather environment 2 GENERAL REQUIREMENTS 2 DETAILED REQUIREMENTS . 2 Interface characteristics and constraints 2 General considerations . 2 Special circwnstances 2 Inter
9、face characteristics 3 Interface Constraints 3 Air conditioning and ventilation . 4 Heating 4 Wind loading . 4 Snow and ice loading . 4 Special ship configurations . 4 Cold weather operations 4 Arctic Operations 4 Tropical considerations 5 NOTES . 5 Deviations . 5 Conditions . 5 Deviation procedure
10、5 Subject term (key word) listing 5 Compatibility . 4 Wave slap 4 Changes from previous issues . 5 FIGURES Interface . 1 TABLES Table I . Weather environment . 3 iv Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-1377 -302A 17 7777711 003087L
11、I 2 m MIL- STD - 13 9 9 (NAVY) SECTION 302A 29 February 1988 1. GENERAL, SCOPE, INTERFACE AND APPLICABILITY 1.1 General. This section is an integral part of MIL-STD-1399. When the interface between the weather environment and ship/systems/equipment is under consideration this section and the standar
12、d must be viewed as a single document. The procedures established by MIL-STD-1399 are mandatory. 1.2 me. This section establishes interface requirements for shipboard systems/equipment which are exposed to or affected by the weather to ensure compatibility between such systems/equipment and the weat
13、her environment. 1.3 Interface. The interface which is the concern of this section and the basic characteristic and constraint categories involved at this interface are shown symbolically on figure 1 (see “Definitions“ of MIL-STD-1399): INTERFACE c- WEATHER ENVIRONMENT 2/ SHIP/ SYSTEMS/ I/ EQUIPMENT
14、 b-LI BASIC CATEGORIES I/ CHARACTERISTICS 2J CONSTRAINTS Air temperature Water temperature Wind Precipitation Humidity Solar radiation Compatab il i ty Air conditioning/ventilating Heating Wind loading Snow and ice loading Wave slap FIGURE 1. Interface. The particular interface characteristics and c
15、onstraints pertinent to this section are described in 5.2 and 5.3. 1.4 ADDlicabiiitp. This section applies to the weather environment (see 3.1) as it relates to the design of ships/systems/equipment. It does not apply to the concomitant effects of ship motfon and attitude or to wave impact and board
16、ing seas. 2. REFERENCED DOCUMENTS 2.1 -. The following document of the issue in effect on date of invitation for bids or request for proposal form a part of this standard to the extent specified herein. a Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,
17、-,-NIL-STD-1377 -302A 17 7777731 0030875 4 m- MIL-STD-l399(NAVY) SECTION 302A 29 February 1988 MILITARY STANDARD MIL-STD-210 - Climatic Extremes for Military Equipment. (Copies of standards required by contractors in connection with specific acquisition functions should be obtained from the contract
18、ing activity or as directed by the contracting officer.) 2.2 Order of precedence. In the event of a conflict between the text of this standard and the reference cited herein, the text of this standard shall take precedence. 3. DEFINITIONS 3.1 Weather environment. The weather environment, as used in
19、this section, consists of air and water temperature, humidity, wind and precipitation in the immediate vicinity of the ship. 4. GENERAL REQUIREMENTS 4.1 The specific interface requirements and constraints established herein are mandatory and shall be adhered to by SYSCOMs, PMs, contractors and all o
20、thers engaged in installation (see “Requirements“ of MIL-STD-1399). 5. DETAILED REQUIREMENTS 5.1 Interface characteristics and constraints. 5.1.1 General considerations. Naval ships are designed to operate as required on any navigable ocean in the world and to perform their assigned mission under a
21、wide range of weather conditions. time of the year and area of operation. extreme climatic conditions of the natural environment to which Military equip- ment may be exposed, and establishes uniform limits of normal design requirements not to be exceeded for Military equipment. The values presented
22、therein do not necessarily represent the extremes recorded but are scientific judgement values of climatic extremes which will not be exceeded more than 10 percent of the time during the most extreme month. ships which will be capable of reliable, effective operations under anticipated weather envir
23、onmental conditions, it has been found necessary to establish certain empirical limits with regard to weather factors. MIL-STD-1399 identifies those weather factors which are significant at the shipboard weather environment interface and establishes empirical limits for those factors which may be of
24、 concern in ship/systems/equipment design. These conditions vary with the MIL-STD-210 indicates the probable To assist with the logical design and building of This section of 5.1.2 Special circumstances. The majority of Naval ships, systems and effected equipment are designed to operate when exposed
25、 to the weather environ- mental limits delineated herein. Certain ships may be designed to meet extremes 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-1377 -302A 37 W 7777733 003087b h = Lim Weather factor Maximum Air temperature 100F (37
26、.8“C) (Note 2) I MIL-STD-I399(NAVY) SECTION 302A 29 February 1988 Sea temperature 85F (29.4“C) I of heat or cold when so specified. will be significantly degraded by occasional excursions beyond these limits may also be designed to tolerate such circumstances. Specific systems/equipment whose perfor
27、mance 5.2 Interface characteristics. The interface characteristics of the weather environment are given in table I. design purposes. Values given are empirical limits for TABLE I. Weather environment. Relative humidity 1100 percent Wind 75 knots steady; gusts to 100 knots Precipitation 1 inch per ho
28、ur rainfall (concurrent wind velocity 35 knots) .ts (Note i) Minimum -20F (-28.9“C) (with concurrent wind velocity of 40 knots) 10 percent No t app 1 i cable Not applicable 28F (-2.2“C) Note 1. Propulsion plant components taking air from the weather, such as gas turbine engines, shall be capable of
29、starting and operating satisfactorily in any weather air ambient temperature between minus 40 degrees Fahrenheit (“F)(minus 40 degrees Celsius (“C) and 125F (51.7“C) with relative humidity of zero to 100 percent. Note 2. With respect to maximum air temperature, the heating process of solar radiation
30、 and of radiation, conduction and convection in conjunction with own ship generated heat and possible ancillary effects of a mooringperthing arrangement in port may increase air temperatures at some locations above that of the free air. 5.3 Interface constraints. The interface characteristics of the
31、 weather environment impose certain constraints on the design of ships/systems/equipment which are exposed to or affected by this environment. described in 5.3.1 through 5.3.7. These constraints are 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_
32、i MIL-STD-1377 -302A 17 m 7777711 00377 m MIL-STD-l399(NAVY) SECTION 302A 29 February 1988 5.3.1 ComDatibiity. The design of ship structure and syctems/equipment It shall be assumed that any which are exposed to or affected by the weather environment shall be compatible with the interface characteri
33、stics given in 5.2. reasonable combination of these characteristics can occur simultaneously. 5.3.2 Air conditioning - and ventilation. Air conditioning and ventilation systems shall be designed to produce the required compartment ambient conditions with a weather air temperature of 90F (32.2“C) (dr
34、y bulb) and 81F (27.2“C) (wet bulb). 5.3.3 Heating. Heating systsems shall be designed to produce the required compartment temperature Conditions with a weather air temperature of 10F (minus 12.2“C) . 5.3.4 Wind loading. Ship scructure and exposed systems/equipment shall be designed to withstand a w
35、ind loading of 30 pounds per square foot (ib/ft2). For ship structure this applies to the projected area with no reduction for vertical members because of heel. 5.3.5 Snow and ice loadinq. Ship structure shall be designed for snow and Exposed systems/equipment shall be designed to start ice loading
36、of 7.5 lb/ft2. and operate properly when covered with an ice load of 4.5 lb/ft 2 . 5.3.6 Wave slaD. Ship supporting structure and foundations shall be designed for a load transmitted as a result of a wave slap of 500 pounds per square inch acting on the projected area of that portion of equipment an
37、d machinery, mounted on the weather deck that is located beneath a line establish- ing for the hydrostatic head specified for weather deck design. 5.3.7 SDecial ship configurations. When ships are specified to be designed for cold weather operations (ice-strengthened ships) or for Arctic operations,
38、 the additional design criteria specified in 5.3.7.1 and 5.3.7.2 shall apply. 5.3.7.1 Cold weather operations, (a) Heating systems shall be designed to produce the required compart- ment air temperature conditions on the basis of a weather air temperature of minus 20F (minus 28.9“C). Systems/equipme
39、nt installed in exposed locations shall be designed to operate satisfactorily at a minimum air temperature of minus 40F (minus 40C) with a concurrent wind velocity of 70 knots. (b) 5.3.7.2 Arctic oDerations. (a) Heating systems shall be designed to produce the required compart- ment air temperature
40、conditions on the basis of a weather air temperature of minus 50F (minus 45.6“C). Systems/equipment installed in exposed locations shall be designed to operate satisfactorily at a minimum air temperature of minus 65F (minus 53.9“C) with a concurrent wind velocity of 100 knots. (b) 4 Provided by IHSN
41、ot for ResaleNo reproduction or networking permitted without license from IHS-,-,-r MIL-STD-1377 -302A 17 W 77777LL 0030878 T W MIL-STD-l399(NAVY) SECTION 302A 29 February 1988 (c) Topside installations shall be designed to withstand the following fluctuating conditions: (1) Wind - 100 knots which m
42、ay reverse direction in a few minutes; change from O to 70 knots or 70 to O knots in 4 minutes. (2) Temperature - Change of 50F (27.7“C) in 1 hour. (3) Relative humidity - Change of 50 percent in 4 hours-or 80 percent in 7 hours. 5.3.8 Tropical considerstions. Certain systems/equipment may be intole
43、rant of even occasional excursions of temperature above the limits prescribed in table I (also see 5.1.1) which could be encountered under some tropical operating situations. system/equipment shall be modified accordingly. In such circumstance the design criteria applied to the particular 6. NOTES 6
44、.1 Deviations. 6.1.1 Conditions. In achieving the purpose of this section it is recog- nized that circumstances may arise where there must be some flexibility in the mandatory application of environmental design constraints. stage of shipboard systems, equipment, or structure which are exposed to or
45、 affected by the weather environment it may become apparent that significant advantages in the overall design/operation can be achieved by deviating from the standard characteristics specified herein. In such instance, the provisions of the “Deviations“ of MIL-STD-1399 should be followed. During the
46、 early 6.1.2 Deviation procedure. When invoking deviations to this section, correspondence and similar information should be submitted by the contracting activity to the Naval Sea Systems Command (NAVSEX 552) program manager. 6.2 Subiect term (key word) listinq. Air temperature Precipitation Relativ
47、e humidity Sea temperature Snow and ice loading Wave slap Weather factor Wind loading 6.3 Changes from previous issue. Asterisks are not used in this revision to identify changes with respect to the previous issue due to the extensivmess of the changes. Review activities: AS, OS, EC, YD Preparing activity: Navy - SH (Project 1990-N069) 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
