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深圳高陽通訊樓七氟丙烷滅火系統(tǒng)設(shè)計 摘要：本文根據(jù)深圳高陽萬國電腦有限公司通訊樓的具體工程概況， 采用全淹沒式七氟丙烷（FM-200）滅火系統(tǒng)對其進(jìn)行保護(hù)，同時對目前哈龍 滅火系統(tǒng)替代產(chǎn)品的滅火性能、使用場所及對環(huán)境與人身安全影響進(jìn)行了分 析，對七氟丙烷（FM-200）氣體滅火系統(tǒng)的滅火機(jī)理、設(shè)計要求以及系統(tǒng)維 護(hù)進(jìn)行了全面的調(diào)查、分析與研究，包括自動報警系統(tǒng)的設(shè)計和一些必要的 安全疏散要求以及對系統(tǒng)的經(jīng)濟(jì)預(yù)算，完成了本文設(shè)計。 關(guān)鍵詞： 哈龍 七氟丙烷 自動報警 經(jīng)濟(jì)預(yù)算 FM-200 Ariform Extinguish System’s Design of Communicative Floor in Gao Yang Limited Company Abstract：This substitution according to the specific project situation of communicative floor in Shenzhen Gao Yang Wan Guo computer limited company, its decided to adopt FM-200 total flooding extinguishes systems to protect it. As the same time, its extinctive characteristic, applicable place and its effect to environment and personal safety of HALON extinguish systems nowadays is analyzed in this paper. It makes an all-round research, analysis and study to it with the extinctive theory, planning demand and systemic conservation of FM-200, including the design for automatic alarm systems and some essential claim for safety decentralization and the economy budget for the whole system.And complete the design of this substitution. Keywords： HALON FM-200 Automatic alarm Economy budget 目錄 摘要 目錄 前言- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 第一章 七氟丙烷（FM-200）滅火系統(tǒng)簡介- - - - - - - - - - - - - - -1 第二章 現(xiàn)階段哈龍滅火系統(tǒng)替代品的發(fā)展- - - - - - - - - - - - - - - 3 第三章 深圳市高陽萬國電腦系統(tǒng)有限公司通訊樓概況- - - - - - - - - - 7 第四章 七氟丙烷滅火系統(tǒng)設(shè)計與計算- - - - - - - - - - - - - - - - - 8 4.1 七氟丙烷滅火系統(tǒng)防護(hù)區(qū)設(shè)計- - - - - - - - - - - - - - - - 8 4.2 七氟丙烷滅火系統(tǒng)設(shè)計及計算- - - - - - - - - - - - - - - - -11 4.3 七氟丙烷滅火系統(tǒng)設(shè)備選型- - - - - - - - - - - - - - - -42 4.4 七氟丙烷滅火系統(tǒng)安裝與維護(hù)- - - - - - - - - - - - - - -45 第五章 火災(zāi)自動報警系統(tǒng)設(shè)計- - - - - - - - - - - - - - - - - - - - 47 第六章 安全疏散- - - - - - - - - - - - - - -- - - - - - - - - - - 50 第七章 經(jīng)濟(jì)預(yù)算- - - - - - - - - - - - - - -- - - - - - - - - - - 50 后記- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 53 參考文獻(xiàn)- - - - - - - - - - - - - - -- - - - - - - - - - - - - - - 54 NFPA 13
National Fire Protection Association國家防火協(xié)會（美）
自動噴水滅火系統(tǒng)安裝標(biāo)準(zhǔn)
1999版本
版權(quán) 1999 NFPA, 所有權(quán)受保護(hù)
NFPA 13
自動噴水滅火系統(tǒng)安裝標(biāo)準(zhǔn)
1999 版本
注：數(shù)字或字母后的星號(*)指明一個段落的說明性材料可在附錄A中查找。
一個段落或正文中的小節(jié)中的數(shù)字或字母后的箭頭(?)指出說明性試驗和關(guān)于圖表或小節(jié)的程序可在附錄C中查找。
小節(jié)或段落結(jié)尾處的圓括號()中的內(nèi)容指明此材料是參考于另一NFPA文獻(xiàn)。
在圓括號中粗體數(shù)字指明文檔號碼以及之后在文獻(xiàn)中可被查到的段落號。參考文獻(xiàn)的完整的標(biāo)題和當(dāng)前的版本可在參考出版物的章節(jié)中被查找。
參考文獻(xiàn)中的資料可在第十三章和附錄E中查找。
第一章 說明
1-1 范圍.
本標(biāo)準(zhǔn)規(guī)定了設(shè)計的最小要求和自動噴水滅火系統(tǒng)的安裝及維護(hù)，包括性質(zhì)和適量給水以及噴水裝置的選型, 適合的裝置, 閥,管路和全部的材料和附件, 包括防火系統(tǒng)主要部分的安裝。 本標(biāo)準(zhǔn)包含“聯(lián)合干管” 既消防用水和生活用水聯(lián)用，也包含單獨的消防用水干管。
1-2* 目的.
本標(biāo)準(zhǔn)的目的是通過基于可靠的工程原理, 測試數(shù)據(jù)和經(jīng)驗對自動噴水滅火系統(tǒng)的標(biāo)準(zhǔn)化設(shè)計、安裝和調(diào)試，包括消防干管將火災(zāi)中人員傷亡和財產(chǎn)損失降低到合理最低程度。本標(biāo)準(zhǔn)盡力延續(xù)已被自動噴水體系確認(rèn)的優(yōu)秀記錄直到會議決定有技術(shù)替代的必要。本標(biāo)準(zhǔn)無意限制新技術(shù),本標(biāo)準(zhǔn)提供的安全等級并未被降低。未被本標(biāo)準(zhǔn)特別指定的原材料和設(shè)計需完全符合設(shè)計清單的條件、要求和限制。
1-2.1
一套自動噴水滅火系統(tǒng)和消防獨立干管需要是有知識淵博和有經(jīng)驗的設(shè)計和安裝的專門的滅火系統(tǒng)。
1-3 追溯以往條款
此文件是考慮到從保護(hù)火災(zāi)中的人員傷亡和財產(chǎn)損失而需提供的合理的標(biāo)準(zhǔn)。這份標(biāo)準(zhǔn)被發(fā)行是反映的是國家的現(xiàn)狀和技術(shù)。除非被另外聲明，本標(biāo)準(zhǔn)的條款無意被應(yīng)用于本標(biāo)準(zhǔn)生效期前已存在的或被批準(zhǔn)建設(shè)或安裝的設(shè)備、儀器或裝置。
例外：在那些被權(quán)威所肯定存在的情形或?qū)ι拓敭a(chǎn)造成明顯威脅的情形的案例中，標(biāo)準(zhǔn)將被應(yīng)用。
1-4 定義
1-4.1 NFPA定義
經(jīng)核準(zhǔn)。* 權(quán)威所有權(quán)限認(rèn)可。
權(quán)威所有權(quán)限.* 團(tuán)體, 部門, 或個人可依賴和滿意的裝備, 材料, 裝置或程序。
列表.* 設(shè)備, 材料, 或維修包括由有關(guān)產(chǎn)品或維護(hù)的評估和權(quán)威所有權(quán)限認(rèn)可的組織出版的列表，設(shè)備或原料列出的產(chǎn)品的定期維護(hù)檢查或定期的保養(yǎng)評估，接受適當(dāng)指定標(biāo)準(zhǔn)的或者已被測試并被指定目的的適當(dāng)?shù)闹圃斓脑O(shè)備、原料或維護(hù)都被列如列表。
Shall. 顯示一個強(qiáng)制的必要條件。
Should. 指出一個建議或者是被考慮過但未被采用的。
Standard. 一個檔案, 只包含強(qiáng)制性規(guī)定的使用“shall”指出其需要和另一個被法律所采用的標(biāo)準(zhǔn)提及的適當(dāng)?shù)囊话愕男问降囊?guī)定。未被考慮的規(guī)定應(yīng)被定位于附錄、腳注或印刷物的注釋中而不會被定義在一個標(biāo)準(zhǔn)的必要條件中。
1-4.2 一般定義。
隔斷。一個完整的空間被墻和天花板分隔。如果從天花板到開口深度小于8英寸（203mm）間隔允許和相鄰房間有開口相通。
吊頂。安裝在自動噴水滅火系統(tǒng)下面的天花板系統(tǒng), 由暴露于熱度中會從底座上掉落的熱敏感的透明的或不透明的面板組成。
民用建筑。一個或多個房間安排一個人住或多個人同住，作為一個住所通常應(yīng)該有烹飪、生存、衛(wèi)生和睡眠的設(shè)備。根據(jù)此標(biāo)準(zhǔn)規(guī)定，民用建筑包括旅館、宿舍、公寓、集體宿舍、避難所的臥室以及類似的建筑。.
火勢的控制。噴放水以限制火災(zāi)的范圍以減少熱量的釋放速度和遠(yuǎn)離之前臨近的易燃物，通過控制氣體溫度來避免建筑物的危險。
火的撲滅。通過直接的手段和足夠兩的水噴入火場的燃燒物迅速地減慢火場熱量的釋放速度和撲滅火災(zāi)。
明顯火災(zāi)危險。 高層建筑易燃物火災(zāi)引發(fā)的典型的火災(zāi)危險。
高層固體堆積物儲藏室。不超過12英尺（3.7米）高度的固體堆積物、貨盤、儲藏箱和儲藏架。
水力系統(tǒng)。 一個合理的噴水系統(tǒng)，其中管徑在壓力損失的基礎(chǔ)上進(jìn)行選擇以提供一個預(yù)先設(shè)定的水密度，用每分鐘每平方英尺（mm/min）的加侖量表示，或者一個預(yù)先設(shè)定的每個噴水裝置的最小釋放壓力或流量，它在一個特定的區(qū)域上以一定程度合理的均勻布置。
有限易燃的材料。用做建筑建設(shè)材料，一種不符和非燃燒物質(zhì)的定義的有不超過3500英國熱量單位每１b（8141kj/kg）的潛熱值（以這種形態(tài)而被利用）并且符合以下（a）和（b）之一情況的材料。因為老化，潮濕或其他大氣條件的影響而易于增加燃燒性或火焰擴(kuò)張額度超過這里建立的限制的材料都要認(rèn)做是可燃的。（a）有非燃燒物質(zhì)結(jié)構(gòu)基礎(chǔ)，鋪成平面不超過1/8英寸（3.2mm）的厚度并且火焰擴(kuò)張等級不大于50的物質(zhì)。（b）以應(yīng)用的形式與厚度存在，除了（a）中描述的以外，既沒有大于25的火焰擴(kuò)張等級又沒有持續(xù)的增面燃燒跡象的物質(zhì)和一些其表面能通過在任何平面上切開材料而暴露的成分而其火焰擴(kuò)張等級不大于25又沒有持續(xù)增面燃燒跡象的物質(zhì)。
混合貯藏室。*高度不超過12英尺（3.66m）并且偶爾用于其他占有使用群體的貯藏室。這些貯藏室不應(yīng)超過建筑面積的10%或者說是4000平方英尺（372m2）的噴水區(qū)域，無論哪一個更大.在一個建筑或區(qū)域的這種貯藏室不應(yīng)該超過1000平方英尺（93m2），并且每一個這樣的建筑與區(qū)域應(yīng)該與其他的貯藏區(qū)域分開至少25英尺（7.62m）。
不燃燒材料。以它被利用的形式并且在預(yù)期的條件下，當(dāng)遭受火災(zāi)或受熱時不點火，燒焦，支持燃燒或者釋放可燃?xì)怏w的物質(zhì)。報告已經(jīng)通過美國材料實驗協(xié)會E136，垂直管熔爐750度條件材料性能標(biāo)準(zhǔn)測試方法的應(yīng)被認(rèn)為是不燃燒材料。
管道目錄系統(tǒng)。 管道膠料從一個目錄中選擇的噴水系統(tǒng)通過占有分級來確定，在其中，許多噴水裝置允許從具體大小的管道中供應(yīng)。
工程焊接。 在本標(biāo)準(zhǔn)使用時，在術(shù)語shop-welded中的shop既有（１）一套自動噴水滅火系統(tǒng)的承包人或者制造人的預(yù)述的意思又有（２）一個原先特定的區(qū)域或權(quán)威認(rèn)可的定位焊接，就比如一個分離開外表面的位置、維修車間或者其他的從易燃物和可燃物的區(qū)域中隔離出來的不燃物或難燃物的區(qū)域（既有臨時的也有永久的）。
小的房間。 一個不超過800平方英尺（74.3m）有足夠照明且暢通無阻的建筑物和走廊被墻壁和天花板隔斷。如果從天花板到過梁的最小深度是8英寸（203mm）則允許鄰近的房間開口。
自動噴水噴頭* 為了防火的目的，一套完整的地面下或天花板上的管道系統(tǒng)應(yīng)與防火工程標(biāo)準(zhǔn)相一致。它的安裝應(yīng)包括一個或多個自動噴水設(shè)備。自動噴水系統(tǒng)在地面上的部分是一個特殊尺寸的網(wǎng)絡(luò)系統(tǒng)或安裝于大樓、建筑物或地區(qū)中的原有的水力輸送管道，一般位于上方，系統(tǒng)圖中附有噴水裝置圖。每個系統(tǒng)的控制閥在系統(tǒng)的起點或它的上水干管處。每個噴頭都包括一個在其啟動的時候發(fā)出警報的設(shè)備。噴頭通常由火焰的熱量啟動并在著火區(qū)域噴水。
噴頭工作壓力。 最大的預(yù)設(shè)靜壓(不流動的) 或動壓應(yīng)用于自動噴水滅火系統(tǒng)形成唯一的高壓。
熱屏蔽。一種在火災(zāi)發(fā)生后15分鐘后限制為暴露表面的熱量平均上升以控制其溫度不高于250°F (121°C)，遵守標(biāo)準(zhǔn)中的NFPA251時間-溫度曲線，建筑物或材料的耐火實驗標(biāo)準(zhǔn)。
1-4.3 自動噴水滅火系統(tǒng)分類
濕式自動噴水滅火系統(tǒng)。 一套使用自動噴水的使用和供水干管相連的充滿水的濕式自動噴水滅火系統(tǒng)。由火場的熱量啟動在其中的液態(tài)水瀉出后立即噴水。
閉式自動噴水滅火系統(tǒng)。濕的管自動灑水裝置所有非-火保護(hù)連接到自動機(jī)械自動灑水裝置在封閉的-環(huán)吹笛排列為了利用灑水車吹笛到行為水為了熱或冷卻, 什么地方水是不遠(yuǎn)離的或使用從系統(tǒng)但是唯一的流通穿過吹笛系統(tǒng)。
干濕式自動噴水滅火系統(tǒng) 一套管道內(nèi)充滿一定壓力下的氣體的在同一區(qū)域有維持壓力系統(tǒng)的包含自動噴水噴頭的閉式噴水管路系統(tǒng)。在探測器啟動后氣體平穩(wěn)流動并保持管內(nèi)一定壓力。在自動噴水裝置啟動前流盡管內(nèi)氣體。探測系統(tǒng)也可作為自動火災(zāi)報警系統(tǒng)。
淹沒式自動噴水滅火系統(tǒng)。一套附有給水系統(tǒng)的開式噴水系統(tǒng)通過一根供水干管連接供水管網(wǎng)并有安裝于和噴頭同一位置的探測器啟動。當(dāng)干管開放時所有噴頭一起噴水。
干式自動噴水滅火系統(tǒng)。一套包含自動噴水噴頭的且管路中充滿一定壓力下的空氣或氮氣，管路中的氣體釋放盡后（當(dāng)噴頭動作時），水才能進(jìn)入管網(wǎng)系統(tǒng)并充滿管道于噴頭瀉出。
枝狀自動噴水滅火系統(tǒng)* 一套管路為多重分支連接并平行交叉于干管的給水系統(tǒng)。噴水系統(tǒng)啟動時水可以從兩條供水分支供給，當(dāng)另一條供水支管穿過干管中間。
網(wǎng)狀自動噴水滅火系統(tǒng)。* 一套從干管到啟動的噴頭處有多于一條供水支管并且供水支管不交叉相連的自動噴水滅火系統(tǒng)。
預(yù)作用式自動噴水滅火系統(tǒng)。* 一套管道中可能有壓力空氣或著沒有壓力空氣的附有供水系統(tǒng)的自動噴水滅火系統(tǒng)，在和噴頭相同位置安裝有補(bǔ)足的探測器。
濕式管路自動噴水滅火系統(tǒng)。一套包含自動噴水噴頭且和供水干管相連接的自動噴水滅火系統(tǒng)，當(dāng)噴頭由于火場的熱量而動作時能立即噴水滅火。
NFPA 13
Standard for the Installation of Sprinkler Systems
1999 Edition
Copyright ? 1999 NFPA, All Rights Reserved
NFPA 13
Standard for the
Installation of Sprinkler Systems
1999 Edition
NOTICE: An asterisk (*) following the number or letter designating a paragraph indicates that explanatory material on the paragraph can be found in Appendix A.
A dagger (?) following the number or letter designating a paragraph or section in the text indicates explanatory test data and procedures with regard to that paragraph or section can be found in Appendix C.
A reference in parentheses () at the end of a section or paragraph indicates that the material has been extracted from another NFPA document. The bold number in parentheses indicates the document number and is followed by the section number where the extracted material can be found in that document. The complete title and current edition of an extracted document can be found in the chapter on referenced publications.
Information on referenced publications can be found in Chapter 13 and Appendix E.
Chapter 1 General Information
1-1 Scope.
This standard provides the minimum requirements for the design and installation of automatic fire sprinkler systems and exposure protection sprinkler systems, including the character and adequacy of water supplies and the selection of sprinklers, fittings, piping, valves, and all materials and accessories, including the installation of private fire service mains. This standard encompasses “combined service mains” used to carry water for both fire service and other uses as well as mains for fire service use only.
1-2* Purpose.
The purpose of this standard is to provide a reasonable degree of protection for life and property from fire through standardization of design, installation, and testing requirements for sprinkler systems, including private fire service mains, based on sound engineering principles, test data, and field experience. This standard endeavors to continue the excellent records that have been established by sprinkler systems while meeting the needs of changing technology. Nothing in this standard is intended to restrict new technologies or alternate arrangements, provided the level of safety prescribed by this standard is not lowered. Materials or devices not specifically designated by this standard shall be utilized in complete accord with all conditions, requirements, and limitations of their listings.
1-2.1
A sprinkler system and private fire service mains are specialized fire protection systems and require knowledgeable and experienced design and installation.
1-3 Retroactivity Clause.
The provisions of this document are considered necessary to provide a reasonable level of protection from loss of life and property from fire. They reflect situations and the state of the art at the time the standard was issued.| Unless otherwise noted, it is not intended that the provisions of this document be applied to facilities, equipment, structures, or installations that were existing or approved for construction or installation prior to the effective date of this document.
Exception: In those cases where it is determined by the authority having jurisdiction that the existing situation involves a distinct hazard to life or property, this standard shall apply.
1-4 Definitions.
1-4.1 NFPA Definitions.
Approved.* Acceptable to the authority having jurisdiction.
Authority Having Jurisdiction.* The organization, office, or individual responsible for approving equipment, materials, an installation, or a procedure.
Listed.* Equipment, materials, or services included in a list published by an organization that is acceptable to the authority having jurisdiction and concerned with evaluation of products or services, that maintains periodic inspection of production of listed equipment or materials or periodic evaluation of services, and whose listing states that either the equipment, material, or service meets appropriate designated standards or has been tested and found suitable for a specified purpose.
Shall. Indicates a mandatory requirement.
Should. Indicates a recommendation or that which is advised but not required.
Standard. A document, the main text of which contains only mandatory provisions using the word “shall” to indicate requirements and which is in a form generally suitable for mandatory reference by another standard or code or for adoption into law. Nonmandatory provisions shall be located in an appendix, footnote, or fine-print note and are not to be considered a part of the requirements of a standard.
1-4.2 General Definitions.
Compartment. A space completely enclosed by walls and a ceiling. The compartment enclosure is permitted to have openings to an adjoining space if the openings have a minimum lintel depth of 8 in. (203 mm) from the ceiling.
Drop-Out Ceiling. A suspended ceiling system, which is installed below the sprinklers, with listed translucent or opaque panels that are heat sensitive and fall from their setting when exposed to heat.
Dwelling Unit. One or more rooms arranged for the use of one or more individuals living together, as in a single housekeeping unit normally having cooking, living, sanitary, and sleeping facilities. For purposes of this standard, dwelling unit includes hotel rooms, dormitory rooms, apartments, condominiums, sleeping rooms in nursing homes, and similar living units.
Fire Control. Limiting the size of a fire by distribution of water so as to decrease the heat release rate and pre-wet adjacent combustibles, while controlling ceiling gas temperatures to avoid structural damage.
Fire Suppression. Sharply reducing the heat release rate of a fire and preventing its regrowth by means of direct and sufficient application of water through the fire plume to the burning fuel surface.
High-Challenge Fire Hazard. A fire hazard typical of that produced by fires in combustible high-piled storage.
High-Piled Storage. Solid-piled, palletized, rack storage, bin box, and shelf storage in excess of 12 ft (3.7 m) in height.
Hydraulically Designed System. A calculated sprinkler system in which pipe sizes are selected on a pressure loss basis to provide a prescribed water density, in gallons per minute per square foot (mm/min), or a prescribed minimum discharge pressure or flow per sprinkler, distributed with a reasonable degree of uniformity over a specified area.
Limited-Combustible Material. As applied to a building construction material, a material not complying with the definition of noncombustible material that, in the form in which it is used, has a potential heat value not exceeding 3500 Btu per lb (8141 kJ/kg) and complies with one of the following, (a) or (b). Materials subject to increase in combustibility or flame spread rating beyond the limits herein established through the effects of age, moisture, or other atmospheric condition shall be considered combustible. (a) Materials having a structural base of noncombustible material, with a surfacing not exceeding a thickness of 1/8 in. (3.2 mm) that has a flame spread rating not greater than 50. (b) Materials, in the form and thickness used, other than as described in (a), having neither a flame spread rating greater than 25 nor evidence of continued progressive combustion and of such composition that surfaces that would be exposed by cutting through the material on any plane would have neither a flame spread rating greater than 25 nor evidence of continued progressive combustion.
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Miscellaneous Storage.* Storage that does not exceed 12 ft (3.66 m) in height and is incidental to another occupancy use group. Such storage shall not constitute more than 10 percent of the building area or 4000 ft2 (372 m2) of the sprinklered area, whichever is greater. Such storage shall not exceed 1000 ft2 (93 m2) in one pile or area, and each such pile or area shall be separated from other storage areas by at least 25 ft (7.62 m).
Noncombustible Material. A material that, in the form in which it is used and under the conditions anticipated, will not ignite, burn, support combustion, or release flammable vapors when subjected to fire or heat. Materials that are reported as passing ASTM E 136, Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750°C, shall be considered noncombustible materials.
Pipe Schedule System. A sprinkler system in which the pipe sizing is selected from a schedule that is determined by the occupancy classification and in which a given number of sprinklers are allowed to be supplied from specific sizes of pipe.
Shop-Welded. As used in this standard, shop in the term shop-welded means either (1) a sprinkler contractor’s or fabricator’s premise or (2) an area specifically designed or authorized for welding, such as a detached outside location, maintenance shop, or other area (either temporary or permanent) of noncombustible or fire-resistive construction free of combustible and flammable contents and suitably segregated from adjacent areas.
Small Rooms. A room of light hazard occupancy classification having unobstructed construction and floor areas not exceeding 800 ft2 (74.3 m2) that are enclosed by walls and a ceiling. Openings to the adjoining space are permitted if the minimum lintel depth is 8 in. (203 mm) from the ceiling.
Sprinkler System.* For fire protection purposes, an integrated system of underground and overhead piping designed in accordance with fire protection engineering standards. The installation includes one or more automatic water supplies. The portion of the sprinkler system aboveground is a network of specially sized or hydraulically designed piping installed in a building, structure, or area, generally overhead, and to which sprinklers are attached in a systematic pattern. The valve controlling each system riser is located in the system riser or its supply piping. Each sprinkler system riser includes a device for actuating an alarm when the system is in operation. The system is usually activated by heat from a fire and discharges water over the fire area.
System Working Pressure. The maximum anticipated static (nonflowing) or flowing pressure applied to sprinkler system components exclusive of surge pressures.
Thermal Barrier. A material that will limit the average temperature rise of the unexposed surface to not more than 250°F (121°C) after 15 minutes of fire exposure, which complies with the standard time-temperature curve of NFPA 251, Standard Methods of Tests of Fire Endurance of Building Construction and Materials.
1-4.3 Sprinkler System Type Definitions.
Antifreeze Sprinkler System. A wet pipe sprinkler system employing automatic sprinklers that are attached to a piping system that contains an antifreeze solution and that are connected to a water supply. The antifreeze solution is discharged, followed by water, immediately upon operation of sprinklers opened by heat from a fire.
Circulating Closed-Loop Sprinkler System. A wet pipe sprinkler system having non-fire protection connections to automatic sprinkler systems in a closed-loop piping arrangement for the purpose of utilizing sprinkler piping to conduct water for heating or cooling, where water is not removed or used from the system but only circulated through the piping system.
Combined Dry Pipe-Preaction Sprinkler System. A sprinkler system employing automatic sprinklers attached to a piping system containing air under pressure with a supplemental detection system installed in the same areas as the sprinklers. Operation of the detection system actuates tripping devices that open dry pipe valves simultaneously and without loss of air pressure in the system. Operation of the detection system also opens listed air exhaust valves at the end of the feed main, which usually precedes the opening of sprinklers. The detection system also serves as an automatic fire alarm system.
Deluge Sprinkler System. A sprinkler system employing open sprinklers that are attached to a piping system that is connected to a water supply through a valve that is opened by the operation of a detection system installed in the same areas as the sprinklers. When this valve opens, water flows into the piping system and discharges from all sprinklers attached thereto.
Dry Pipe Sprinkler System. A sprinkler system employing automatic sprinklers that are attached to a piping system containing air or nitrogen under pressure, the release of which (as from the opening of a sprinkler) permits the water pressure to open a valve known as a dry pipe valve, and the water then flows into the piping system and out the opened sprinklers.
Gridded Sprinkler System.* A sprinkler system in which parallel cross mains are connected by multiple branch lines. An operating sprinkler will receive water from both ends of its branch line while other branch lines help transfer water between cross mains.
Looped Sprinkler System.* A sprinkler system in which multiple cross mains are tied together so as to provide more than one path for water to flow to an operating sprinkler and branch lines are not tied together.
Preaction Sprinkler System.* A sprinkler system employing automatic sprinklers that are attached to a piping system that contains air that might or might not be under pressure, with a supplemental detection system installed in the same areas as the sprinklers.
Wet Pipe Sprinkler System. A sprinkler system employing automatic sprinklers attached to a piping system containing water and connected to a water supply so that water discharges immediately from sprinklers opened by heat from a fire.
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