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GB 15322 consists of the following parts under the general title Combustible gas detectors:
——Part 1: Point-type combustible gas detectors for industrial and commercial use;
——Part 2: Household combustible gas detectors;
——Part 3: Portable combustible gas detectors for industrial and commercial use;
——Part 4: Line-type optical beam combustible gas detectors for industrial and commercial use.
This is Part 1 of GB 15322.
This part is developed in accordance with the rules given in GB/T 1.1-2009.
This part replaces GB 15322.1-2003 Combustible gas detectors - Part 1: Point type detectors for 0~100% LEL combustible gas and GB 15322.4-2003 Combustible gas detectors - Part 4: Point type detectors for combustible man-made gas. The following main technical changes have been made with respect to GB 15322.1-2003 and GB 15322.4-2003:
——The contents of GB 15322.1-2003 and GB 15322.4-2003 are merged into one part;
——According to the measurement range, the detectors are classified into three types: detectors with a measurement range between 3%LEL and 100%LEL, detectors with a measurement range below 3%LEL, and detectors with a measurement range above 100%LEL. According to the working mode, the detectors are classified into two types: system type detectors and alarm type detectors. According to the sampling method, the detectors are classified into three types: diffusion detectors, aspiration detectors and optical fiber sensing detectors (see Clause 3; Clause 4 of GB 15322.1-2003 and that of GB 15322.4-2003).
——The requirements for alarm operation values of detectors under various test conditions are revised (see Clause 4; Clause 5 of GB 15322.1-2003 and that of GB 15322.4-2003).
——The sampling airflow variation test is added for aspiration detectors (see 4.3.8).
——The line transmission performance test and detector interchangeability test are added for system type detectors (see 4.3.9 and 4.3.10).
——The surge immunity test and immunity test for conducted disturbance induced by radio-frequency field are added to the electromagnetic compatibility test items (see 4.3.14).
——The poison resistance test is added (see 4.3.18).
——The low concentration operation test is added (see 4.3.20).
This part was proposed by and is under the jurisdiction of the Ministry of Emergency Management of the People's Republic of China.
The previous editions of this parts are as follows:
——GB 15322-1994;
——GB 15322.1-2003;
——GB 15322.4-2003.
Combustible gas detectors - Part 1: Point-type combustible gas detectors for industrial and commercial use
1 Scope
This part of GB 15322 specifies the classification, requirements, tests, test rules and markings of point-type combustible gas detectors for industrial and commercial use.
This part is applicable to point-type combustible gas detectors (hereinafter referred to as "detectors") which are installed and used in industrial and commercial places to detect hydrocarbons, ethers, esters, alcohols, carbon monoxide, hydrogen and other combustible gases and vapors. This part is also applicable to detectors with special performance used in industrial and commercial places, except that special requirements shall be required separately by relevant standards.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 3836.1-2010 Explosive atmospheres - Part 1: Equipment - General requirements
GB/T 9969 General principles for preparation of instructions for use of industrial products
GB 12978 Rules for test of fire electronic products
GB/T 16838 Environmental test methods and severities for fire electronic products
GB/T 17626.2-2018 Electromagnetic compatibility - Testing and measurement techniques - Electrostatic discharge immunity test
GB/T 17626.3-2016 Electromagnetic compatibility - Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test
GB/T 17626.4-2018 Electromagnetic compatibility - Testing and measurement techniques - Electrical fast transient/burst immunity test
GB/T 17626.5-2008 Electromagnetic compatibility - Testing and measurement techniques - Surge immunity test
GB/T 17626.6-2017 Electromagnetic compatibility - Testing and measurement techniques - Immunity to conducted disturbances, induced by radio-frequency fields
3 Classification
3.1 By measurement range:
a) Detectors with a measurement range between 3%LEL and 100%LEL;
b) Detectors with a measurement range below 3%LEL (including detectors detecting carbon monoxide);
c) Detectors with a measurement range above 100%LEL.
Note: The lower explosion limit (LEL) is the lowest explosion concentration of combustible gas or vapor in air.
3.2 By working mode:
a) System type detectors;
b) Alarm type detectors.
3.3 By sampling method:
a) Diffusion detectors;
b) Aspiration detectors;
c) Optical fiber sensing detectors.
3.4 By the service environment:
a) Indoor detectors;
b) Outdoor detectors.
4 Requirements
4.1 General
The detectors shall meet the relevant requirements of Clause 4, and shall be tested in accordance with Clause 5 to confirm whether the detectors meet the requirements of Clause 4.
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4.2 Appearance requirements
4.2.1 The detectors shall be provided with the complete package when they are delivered, and the package shall contain the quality certificate and the instructions for use.
4.2.2 The detectors shall be free from corrosion, coating peeling, blistering, obvious mechanical damage such as scratches, cracks, burrs, etc., on their surfaces, and free from looseness in fastening parts.
4.3 Performance
4.3.1 General requirements
4.3.1.1 The operation under energized conditions such as zeroing, calibrating and changing parameters of the detector shall not change the integrity of its housing.
4.3.1.2 The system type detectors shall be powered by DC voltage of 36V and below, and the alarm type detectors shall be powered by AC voltage of 220V. The detectors powered by DC voltage shall be protected against polarity reverse connection.
4.3.1.3 The diffusion detectors and the aspiration detectors shall have independent indicating lights to indicate their normal monitoring, fault and alarm operating state respectively. If the field detection components of the optical fiber sensing detector do not have independent operating state indicating lights, the control and indication equipment connected with them shall have independent indicating lights to indicate their operating state, where the green indicates normal monitoring state, the yellow indicates fault state and the red indicates alarm state respectively. The lower limit and higher limit alarm state indications shall be clearly distinguished. The indicating lights shall have their functions noted in Chinese. Under 5lx~500lx illumination and at 5m in front of the detector, the indicator light shall be clearly visible.
Note: Normal monitoring state refers to that the detector operates normally in an energized state, without alarm signal or fault signal.
4.3.1.4 When the concentration of combustible gas in the monitored area reaches the alarm set point, the detector shall be able to send out an alarm signal. Then the detector is put in a normal environment, and it shall be able to automatically (or manually) return to the normal monitoring state within 30s.
4.3.1.5 The alarm type detectors shall have an alarm output interface. The type and capacity of the alarm output interface shall match with those of the adapting products or executive components specified by the manufacturer, and shall be indicated in the instructions for use. If the alarm output interface of the detector has a delay function, the maximum delay time shall not exceed 30s.
4.3.1.6 The system type detectors shall be able to output signals corresponding to their concentration measured and the operating state. Information such as signal types and parameters shall be indicated in the instructions for use.
4.3.1.7 The alarm type detectors have a concentration display function. Under 5lx~500lx illumination and at 1m in front of the detector, the displayed information shall be clearly visible.
4.3.1.8 The range and alarm set point of detectors are specified as follows:
a) For detectors with a measurement range between 3%LEL~100%LEL, the upper range limit shall be 100%LEL, the lower limit alarm set point shall be in the range of 5%LEL~25%LEL, and if there is a high limit alarm set point, it shall be 50%LEL. If the lower limit alarm set point is adjustable, it shall be adjustable in the range of 5%LEL~25%LEL.
b) For detectors detecting carbon monoxide, the lower limit alarm set point shall be in the range of 150×10-6 (volume fraction)~300×10-6 (volume fraction), and if there is a high limit alarm set point, it shall be 500×10-6 (volume fraction). If the low limit alarm set point is adjustable, it shall be adjustable in the range of 150×10-6 (volume fraction)~300×10-6 (volume fraction).
c) For detectors with a measurement range below 3%LEL and those with a measurement range above 100%LEL, their range and alarm set point shall be specified by the manufacturer.
d) Parameters such as range and alarm set point shall be indicated in the instructions for use of the detector.
4.3.1.9 When a detector uses a plug-in gas sensor, it shall be protected against structural detachment. When the gas sensor is detached, the detector shall be able to send out a fault signal within 30s.
4.3.1.10 When the sampling pipeline of an aspiration detector is blocked or broken, the detector shall be able to send out a fault signal and indicate the fault type.
4.3.1.11 The detectors shall be of explosion-proof type meeting the requirements of GB 3836.1-2010.
4.3.1.12 The model preparation of detectors shall be in accordance with those specified in Annex A.
4.3.1.13 The instructions for use of detectors shall meet the relevant requirements of GB/T 9969, indicating the service life of the gas sensor.
Foreword III
1 Scope
2 Normative references
3 Classification
4 Requirements
4.1 General
4.2 Appearance requirements
4.3 Performance
4.4 Response performance for detecting gases other than methane, propane and carbon monoxide
5 Tests
5.1 Test outline
5.2 Basic performance test
5.3 Alarm operation value test
5.4 Range indication deviation test
5.5 Response time test
5.6 Orientation test
5.7 Alarm repeatability test
5.8 High speed airflow test
5.9 Sampling airflow variation test (only applicable to aspirated specimens)
5.10 Line transmission performance test (only applicable to systematic specimens)
5.11 Detector interchangeability test (only applicable to systematic specimens)
5.12 Voltage fluctuation test
5.13 Insulation resistance test
5.14 Electrical strength test
5.15 Electrostatic discharge immunity test
5.16 Radiated, radio-frequency electromagnetic field immunity test
5.17 Electrical fast transient/burst immunity test
5.18 Surge (impact) immunity test
5.19 Immunity test for conducted disturbance induced by radio-frequency field
5.20 High temperature (operation) test
5.21 Low temperature (operation) test
5.22 Steady-state damp-heat (operation) test
5.23 Vibration (sinusoidal) (operation) test
5.24 Vibration (sinusoidal) (durability) test
5.25 Drop test
5.26 Gas interference resistance test (not applicable to the specimens with a measurement range below 3%LEL)
5.27 Poison resistance test
5.28 High-concentration gas impact resistance test
5.29 Low concentration operation test
5.30 Long-term stability test
6 Inspection rules
6.1 End-of-manufacturing inspection
6.2 Type inspection
7 Marking
7.1 General
7.2 Product marking
7.3 Quality inspection marking
Annex A (Normative) Product model preparation of detectors
Annex B (Normative) Test equipment for combustible gas detectors
可燃氣體探測器
第1部分：工業及商業用途點型可燃
氣體探測器
1 范圍
GB 15322的本部分規定了工業及商業用途點型可燃氣體探測器的分類、要求、試驗、檢驗規則和標志?
本部分適用于工業及商業場所安裝使用的用于探測烴類、醚類、酯類、醇類、一氧化碳、氫氣及其他可燃性氣體、蒸氣的點型可燃氣體探測器(以下簡稱“探測器”)?工業及商業場所中使用的具有特殊性能的點型可燃氣體探測器，除特殊要求由有關標準另行規定外，亦可執行本部分?
2 規范性引用文件
下列文件對于本文件的應用是必不可少的?凡是注日期的引用文件，僅注日期的版本適用于本文件?凡是不注日期的引用文件，其最新版本(包括所有的修改單)適用于本文件?
GB 3836.1—2010 爆炸性環境 第1部分：設備 通用要求
GB/T 9969 工業產品使用說明書 總則
GB 12978 消防電子產品檢驗規則
GB/T 16838 消防電子產品 環境試驗方法及嚴酷等級
GB/T 17626.2—2018 電磁兼容 試驗和測量技術 靜電放電抗擾度試驗
GB/T 17626.3—2016 電磁兼容 試驗和測量技術 射頻電磁場輻射抗擾度試驗
GB/T 17626.4—2018 電磁兼容 試驗和測量技術 電快速瞬變脈沖群抗擾度試驗
GB/T 17626.5—2008 電磁兼容 試驗和測量技術 浪涌(沖擊)抗擾度試驗
GB/T 17626.6—2017 電磁兼容 試驗和測量技術 射頻場感應的傳導騷擾抗擾度
3 分類
3.1 按測量范圍分為：
a) 測量范圍在3%LEL~100%LEL 之間的探測器；
b) 測量范圍在3%LEL 以下的探測器(包括探測一氧化碳的探測器)；
c) 測量范圍在100%LEL 以上的探測器?
注：爆炸下限(LEL)為可燃氣體或蒸氣在空氣中的最低爆炸濃度?
3.2 按工作方式分為：
a) 系統式探測器；
b) 獨立式探測器?
3.3 按采樣方式分為：
a) 自由擴散式探測器；
b) 吸氣式探測器；
c) 光纖傳感式探測器?
3.4 按使用環境條件分為：
a) 室內使用型探測器；
b) 室外使用型探測器?
4 要求
4.1 總則
探測器應滿足第4章的相關要求，并按第5 章的規定進行試驗，以確認探測器對第4 章要求的符合性?
4.2 外觀要求
4.2.1 探測器應具備產品出廠時的完整包裝，包裝中應包含質量檢驗合格標志和使用說明書?
4.2.2 探測器表面應無腐蝕、涂覆層脫落和起泡現象，無明顯劃傷、裂痕、毛刺等機械損傷，緊固部位無松動?
4.3 性能
4.3.1 一般要求
4.3.1.1 對探測器進行調零、標定、更改參數等通電條件下的操作不應改變其外殼的完整性?
4.3.1.2 系統式探測器應采用36V 及以下的直流電壓供電，獨立式探測器應采用220V 交流電壓供電?采用直流電壓供電的探測器應具有防止極性反接的保護措施?
4.3.1.3 自由擴散式和吸氣式探測器應具有獨立的工作狀態指示燈，分別指示其正常監視、故障、報警工作狀態?光纖傳感式探測器的現場探測部件如不具備獨立的工作狀態指示燈，則與其連接的控制及指示設備應具有獨立的工作狀態指示燈，分別指示每個探測部件的工作狀態?正常監視狀態指示應為綠色，故障狀態指示應為黃色，報警狀態指示應為紅色，低限和高限報警狀態指示應能明確區分?指示燈應有中文功能注釋?在5lx~500lx光照條件下、正前方5m 處，指示燈的狀態應清晰可見?
注： 正常監視狀態指探測器接通電源正常工作，且未發出報警信號或故障信號時的狀態?
4.3.1.4 探測器在被監測區域內的可燃氣體濃度達到報警設定值時，應能發出報警信號?再將探測器置于正常環境中，30s內應能自動(或手動)恢復到正常監視狀態?
4.3.1.5 獨立式探測器應具有報警輸出接口?探測器的報警輸出接口的類型和容量應與制造商規定的配接產品或執行部件相匹配，且應在使用說明書中注明?如探測器的報警輸出接口具有延時功能，其最大延時時間不應超過30s?
4.3.1.6 系統式探測器應能夠輸出與其測量濃度和工作狀態相對應的信號?信號的類型、參數等信息應在使用說明書中注明?
4.3.1.7 獨立式探測器應具有濃度顯示功能?在5lx~500lx光照條件下、正前方1m 處，顯示信息應清晰可見?
4.3.1.8 探測器的量程和報警設定值應符合以下規定：
a) 測量范圍在3%LEL~100%LEL 之間的探測器，其量程上限應為100%LEL，低限報警設定值應在5%LEL~25%LEL 范圍，如具有高限報警設定值，應為50%LEL?低限報警設定值如可調，應在5%LEL~25%LEL 范圍內可調?
b) 探測一氧化碳的探測器，其低限報警設定值應在150×10-6(體積分數)~300×10-6(體積分數)范圍，如具有高限報警設定值，應為500×10-6(體積分數)?低限報警設定值如可調，應在150×10-6(體積分數)~300×10-6(體積分數)范圍內可調?
c) 測量范圍在3%LEL 以下的探測器和測量范圍在100%LEL 以上的探測器應由制造商規定其量程和報警設定值?
d) 探測器使用說明書中應注明量程和報警設定值等參數?
4.3.1.9 探測器采用插拔結構氣體傳感器時，應具有結構性的防脫落措施?氣體傳感器發生脫落時，探測器應能在30s內發出故障信號?
4.3.1.10 吸氣式探測器的采樣管路發生堵塞或破漏時，探測器應能發出故障信號并指示出故障類型?
4.3.1.11 探測器應采用滿足GB 3836.1—2010要求的防爆型式?
4.3.1.12 探測器的型號編制應符合附錄A 的規定?
4.3.1.13 探測器使用說明書應滿足GB/T 9969的相關要求，并應注明氣體傳感器的使用期限?
4.3.2 報警動作值
4.3.2.1 在本部分規定的試驗項目中，測量范圍在3%LEL~100%LEL 之間的探測器，其報警動作值不應低于5%LEL，探測一氧化碳的探測器，其報警動作值不應低于50×10-6(體積分數)?
4.3.2.2 探測器的報警動作值與報警設定值之差應滿足以下要求：
a) 測量范圍在3%LEL~100%LEL 之間的探測器，其報警動作值與報警設定值之差的絕對值不應大于3%LEL?
b) 測量范圍在3%LEL 以下的探測器，其報警動作值與報警設定值之差的絕對值不應大于3%量程和50×10-6(體積分數)之中的較大值?探測一氧化碳的探測器，其報警動作值與報警設定值之差的絕對值不應大于50×10-6(體積分數)?
c) 測量范圍在100%LEL 以上的探測器，其報警動作值與報警設定值之差的絕對值不應大于3%量程?
4.3.3 量程指示偏差
在探測器量程內選取若干試驗點作為基準值，使被監測區域內的可燃氣體濃度分別達到對應的基準值?探測器的顯示值與基準值之差應滿足以下要求：
a) 測量范圍在3%LEL~100%LEL 之間的探測器，其試驗點上的可燃氣體濃度顯示值與基準值之差的絕對值不應大于5%LEL?
b) 測量范圍在3%LEL 以下的探測器，其試驗點上的可燃氣體濃度顯示值與基準值之差的絕對值不應大于5%量程和80×10-6(體積分數)之中的較大值?探測一氧化碳的探測器，其濃度顯示值與基準值之差的絕對值不應大于80×10-6(體積分數)?
c) 測量范圍在100%LEL 以上的探測器，其試驗點上的可燃氣體濃度顯示值與基準值之差的絕對值不應大于5%量程?
4.3.4 響應時間
向探測器通入流量為500mL/min，濃度為滿量程的60%的試驗氣體，保持60s，記錄探測器的顯示值作為基準值?顯示值達到基準值的90%所需的時間為探測器的響應時間?探測一氧化碳的探測器的響應時間不應大于60s，其他氣體探測器的響應時間不應大于30s?
4.3.5 方位
探測器在制造商規定的安裝平面內順時針旋轉，每次旋轉45°，分別測量探測器的報警動作值，報警動作值與報警設定值之差應滿足以下要求：
a) 測量范圍在3%LEL~100%LEL 之間的探測器，其報警動作值與報警設定值之差的絕對值不應大于3%LEL?
b) 測量范圍在3%LEL 以下的探測器，其報警動作值與報警設定值之差的絕對值不應大于3%量程和50×10-6(體積分數)之中的較大值?探測一氧化碳的探測器，其報警動作值與報警設定值之差的絕對值不應大于50×10-6(體積分數)?
c) 測量范圍在100%LEL 以上的探測器，其報警動作值與報警設定值之差的絕對值不應大于3%量程?
4.3.6 報警重復性
對同一只探測器重復測量報警動作值6次，報警動作值與報警設定值之差應滿足以下要求：
a) 測量范圍在3%LEL~100%LEL 之間的探測器，其報警動作值與報警設定值之差的絕對值不應大于3%LEL?
b) 測量范圍在3%LEL 以下的探測器，其報警動作值與報警設定值之差的絕對值不應大于3%量程和50×10-6(體積分數)之中的較大值?探測一氧化碳的探測器，其報警動作值與報警設定值之差的絕對值不應大于50×10-6(體積分數)?
c) 測量范圍在100%LEL 以上的探測器，其報警動作值與報警設定值之差的絕對值不應大于3%量程?
4.3.7 高速氣流
在試驗氣流速率為6m/s±0.2m/s的條件下，測量探測器的報警動作值，報警動作值與報警設定值之差應滿足以下要求：
a) 測量范圍在3%LEL~100%LEL 之間的探測器，其報警動作值與報警設定值之差的絕對值不應大于5%LEL?
b) 測量范圍在3%LEL 以下的探測器，其報警動作值與報警設定值之差的絕對值不應大于5%量程和80×10-6(體積分數)之中的較大值?探測一氧化碳的探測器，其報警動作值與報警設定值之差的絕對值不應大于80×10-6(體積分數)?
c) 測量范圍在100%LEL 以上的探測器，其報警動作值與報警設定值之差的絕對值不應大于5%量程?
4.3.8 采樣氣流變化(僅適用于吸氣式探測器)
4.3.8.1 使探測器在下述采樣氣流條件下工作，測量探測器的報警動作值：
a) 如探測器的采樣流量可調，將采樣流量分別調至最大和最小流量；
b) 如探測器的采樣流量不可調，使采樣流量為正常流量的50%?
4.3.8.2 探測器的報警動作值與報警設定值之差應滿足以下要求：
a) 測量范圍在3%LEL~100%LEL 之間的探測器，其報警動作值與報警設定值之差的絕對值不應大于5%LEL?
b) 測量范圍在3%LEL 以下的探測器，其報警動作值與報警設定值之差的絕對值不應大于5%量程和80×10-6(體積分數)之中的較大值?探測一氧化碳的探測器，其報警動作值與報警設定值之差的絕對值不應大于80×10-6(體積分數)?
c) 測量范圍在100%LEL 以上的探測器，其報警動作值與報警設定值之差的絕對值不應大于5%量程?
4.3.9 線路傳輸性能(僅適用于系統式探測器)
探測器和配接的可燃氣體報警控制器之間的通信線路使用長度為1000 m、截面積為1 mm2 的多股銅導線連接，在可燃氣體報警控制器滿負載條件下測量探測器的報警動作值(總線制可燃氣體報警控制器至少一個回路按設計容量連接真實負載，其他回路連接等效負載)，報警動作值與報警設定值之差應滿足以下要求：
a) 測量范圍在3%LEL~100%LEL 之間的探測器，其報警動作值與報警設定值之差的絕對值不應大于3%LEL?
b) 測量范圍在3%LEL 以下的探測器，其報警動作值與報警設定值之差的絕對值不應大于3%量程和50×10-6(體積分數)之中的較大值?探測一氧化碳的探測器，其報警動作值與報警設定值之差的絕對值不應大于50×10-6(體積分數)?
c) 測量范圍在100%LEL 以上的探測器，其報警動作值與報警設定值之差的絕對值不應大于3%量程?
