标准编号:	JGJ 141-2004
中文名称:	预应力混凝土结构抗震设计规程
英文名称:	Technical specification of air duct
中标分类:	J363
行业分类:	JG    建筑工业行业标准
ICS分类:	91.140.30 91.140.30    通风和空调系统 91.140.30
发布机构:	中华人民共和国建设部
发布日期:	2004-6-4
实施日期:	2004-12-1
标准状态:	superseded
被新标准替代:	JGJ/T 141-2017 通风管道技术规程
被替代日期:	2017-9-1
翻译语言:	英文
文件格式:	PDF
中文字符数:	5000 字
翻译价格(元):	7500.0
交付时间:	付款后 1 个工作日

Technical specification of air duct 1 General provisions 1.0.1 This specification is formulated with a view to standardize the fabrication, installation, inspection and test methods of air ducts, to ensure safety and applicability, advanced technology, cost effectiveness, rationality and convenience for construction, and to assure a good engineering quality. 1.0.2 This specification is applicable to the fabrication and installation of metal or nonmetallic ducts used for ventilation and air conditioning works for newly constructed, expanded and renovated industrial and civil buildings (referred to as “air ducts”). 1.0.3 In addition to this specification, the technical and quality requirements for the fabrication and installation of air ducts shall also meet the requirements of the current relevant compulsory standards of the nation. 2 General requirements 2.0.1 The air ducts shall be fabricated and installed in accordance with the design drawings, contracts and relevant technical standards. In case of any change, there shall be a notice of design or contract change or a technical approval verification. 2.0.2 Before the construction of the air duct system, the construction unit shall coordinate with the development unit, supervision unit, EPC and design units about the position and direction of the air duct and other pipelines, and check the holes reserved for installation, etc. During the construction, the construction unit shall cooperate with personnel of civil engineering and other professional work. 2.0.3 Sheets, profiles and other main finished materials for fabrication and installation of air ducts shall meet the requirements of the current national standards for design and related products, and shall be provided with the ex-factory inspection certificates. During approaching, materials shall be checked and accepted according to the current relevant national standards. 2.0.4 Air ducts supplied as finished products shall be provided with corresponding qualification certificates, including quality certificate of main material, strength and leakage test reports of air duct (nonmetallic air ducts shall also be provided with fire protection and health test certification reports). The performance test methods of air ducts supplied as finished products shall meet the requirements of Annex A to this specification. 2.0.5 Energy-saving, high-efficiency and mechanically processing technology should be preferred for air duct fabrication. 2.0.6 The measuring and testing instruments for the fabrication and installation of air ducts shall be in a conforming state and within the effective inspection period. 2.0.7 Air ducts of concealed works shall be checked, accepted and approved by the supervisor before concealment. 2.0.8 After the installation of air duct system, the leakage test shall be carried out by the system category, with a test method specified in the Annex B to this specification. 2.0.9 Air duct system may be classified into the following three categories according to its working pressure (P): 1 Low pressure system with P≤500Pa; 2 Medium pressure system with 500Pa1500Pa. 2.0.10 Outside length (or outside diameter) should be the designated dimension for metal air ducts, and inside length (or inside diameter) should be the designated dimension for nonmetallic air ducts. Common specifications of side length of rectangular air duct shall meet those specified in Table 2.0.10-1, and the ratio of long side to short side shall not be greater than 4:1. Specifications of circular air ducts shall meet those specified in Table 2.0.10-2, and the basic series are preferred. Table 2.0.10-1 Common specifications of rectangular air ducts (mm) Side length of air duct 120 320 800 2000 4000 160 400 1000 2500 - 200 500 1250 3000 - 250 630 1600 3500 -   Table 2.0.10-2 Specifications of circular air ducts (mm) 3 Air duct fabrication 3.1 General requirements 3.1.1 Metal sheets shall meet the following requirements: 1 The steel sheets shall be flat and smooth in surface, uniform in thickness, and free from defects such as cracks and scars, whose material shall conform to the current national standard GB 13237 Cold-rolled quality carbon structural steel sheets and strips or GB 710 Hot-rolled quality carbon structural steel sheets and strips. 2 Galvanized steel sheets (strips) should be mechanically engaged, and the galvanized coating is made of material above 100# (the mean of three-point test on both sides shall not be less than 100g/m2), and the material shall meet the requirements of the current national standard GB 2518 Continuous hot-dip zinc-coated steel sheets and strips. 3 Austenitic stainless steel shall be used for stainless steel sheet, whose surface shall be free from obvious defects such as scratches, scuffing, spots and pits, and whose material shall meet the requirements of the current national standard GB 3280 Cold rolled stainless steel sheets and plates. 4 The aluminium sheet shall be pure aluminium sheet or rust-proof aluminium alloy sheet, whose surface shall be free from obvious defects such as scratches, scuffing, spots and pits and whose material shall conform to the current national standard GB/T 3880 Aluminium and aluminium alloy rolled sheet. 3.1.2 Metal structural steels shall meet the requirements of the current national standards GB 9787 Hot-rolled equal-leg angle steel — Dimensions, shape, weight and tolerances, GB 704 Dimensions, shape, weight and tolerances for hot-rolled flats, GB 707 Hot-rolled channel steel — Dimensions, shape, weight and tolerances, GB 702 Hot-rolled round and square steel bars — Dimension, shape, weight and tolerance respectively. 3.1.3 The material for nonmetallic air ducts shall meet the following requirements: 1 The combustion performance of nonmetallic air duct materials shall meet the requirements of incombustible grade A or flame retardant grade B1 in the current national standard GB 8624 Classification for burning behavior of building materials and products. 2 The surface aluminium foil material of composite material shall meet the requirements of the current national standard GB 3198 Aluminium foil for general purpose, and its thickness shall not be less than 0.06mm. When the aluminium foil layer is compounded with reinforcing materials, its thickness shall not be less than 0.012mm. 3 The composite layer of composite plate shall be securely bonded. Defects such as delamination and collapse on one side of the outer surface of the plate shall not exceed 6‰, and the internal insulation materials shall not be exposed. 4 The combustion performance of aluminium foil heat-sensitive, pressure-sensitive tapes and adhesives shall meet the flame retardant grade B1 and shall be used within the service life. The adhesives shall match the material for air duct and meet the requirements of environmental protection. 5 The width of aluminium foil pressure-sensitive and heat-sensitive tapes shall not be less than 50mm. The thickness of aluminium foil shall not be less than 0.045mm. The 180° peeling strength of aluminium foil pressure-sensitive sealing tape shall not be lower than 0.52N/mm. The ironing surface of aluminium foil heat-sensitive tape shall have a temperature-sensitive color point, and the color changes when heated to 150°C. In the 180° peeling strength test of heat-sensitive sealing tape, the peeling strength shall not be lower than 0.68N/mm. 6 Unplasticized polyvinyl chloride (PVC-U) plates shall meet the requirements of the current national standards GB/T 4454 Rigid polyvinyl chloride laminated plates or GB/T 13520 Unplasticized polyvinyl chloride extruded plates. The combustion performance of the plates shall be flame retardant grade B1. PVC-U plates shall be free from defects such as bubbles, delamination, carbonization, deformation and cracks. 7 Technical parameters and applicable scope of nonmetallic air duct sheets shall meet those specified in Table 3.1.3.

Foreword ii 1 General provisions 2 General requirements 3 Air duct fabrication 3.1 General requirements 3.2 Steel air duct 3.3 Stainless steel air duct 3.4 Aluminium air duct 3.5 Phenolic aluminium foil compound air duct and polyurethane aluminium foil compound air duct 3.6 Glass fiber compound air duct 3.7 Inorganic FRP air ducts 3.8 PVC-U air duct 3.9 Air duct with air cleaning and conditioning system 3.10 Air duct fittings 3.11 Flexible air duct 4 Installation of air duct 4.1 General requirements 4.2 Fabrication and installation of supports and hangers 4.3 Sealing of air duct Connection 4.4 Installation of nonmetallic air duct 4.5 Installation of nonmetallic air duct 4.6 Installation of flexible air duct 4.7 Installation of air duct of purified air cleaning system 5 Air duct inspection 5.1 General requirements 5.2 Dominant items 5.3 General items Annex A Test method for compressive strength and air leakage rate of air duct Annex B Test method for air duct system light leakage detection and air leakage rate Explanation of wording in this specification

1 总则 1.0.1 为了规范风管的制作、安装、检验和试验方法，做到安全适用、技术先进、经济合理、方便施工，确保工程质量，制定本规程。 1.0.2 本规程适用于新建、扩建和改建的工业与民用建筑的通风与空调工程用金属或非金属管道（简称风管）的制作与安装。 1.0.3 风管制作与安装的技术与质量要求，除应符合本规程外，尚应符合国家现行有关强制性标准的规定。 2 通用规定 2.0.1 风管的制作与安装应按设计图纸、合同和相关技术标准的规定执行，发生变更必须有设计或合同变更的通知书或技术核定签证。 2.0.2 风管系统施工前，施工单位应与建设单位、监理、总承包和设计等单位协调风管与其他管线管路位置走向，核对安装预留孔洞等。施工中应与土建及其他专业工种相互配合。 2.0.3 风管制作与安装所用板材、型材以及其他主要成品材料，应符合设计及相关产品国家现行标准的规定，并应有出厂检验合格证明。材料进场时应按国家现行有关标准进行验收。 2.0.4 以成品供货的通风管道应具有相应的合格证明，包括主材的材质证明、风管的强度及严密性检测报告（非金属风管还需提供消防及卫生检测合格的报告）。成品供货风管的性能试验方法应符合本规程附录A的规定。 2.0.5 风管制作宜优先选用节能、高效、机械化加工制作工艺。 2.0.6 风管制作与安装所使用的计量器具及检测仪器应处于合格状态并在有效检定期内。 2.0.7 隐蔽工程的风管在隐蔽前必须经监理人员验收及认可签证。 2.0.8 风管系统安装完毕，应按系统类别进行严密性试验，其试验方法应符合本规程附录B的规定。 2.0.9 风管系统按其工作压力（P）可划分为以下三个类别： 1 低压系统P≤500Pa； 2 中压系统500Pa＜P≤1500Pa； 3 高压系统P＞1500Pa。 2.0.10 金属风管宜以外边长（或外径）为标注尺寸，非金属风管宜以内边长（或内径）为标注尺寸。矩形风管边长的常用规格应符合表2.0.10-1的规定，其长边与短边之比不宜大于4:1。圆形风管规格应符合表2.0.10-2的规定，并优先选用基本系列。 表2.0.10-1 矩形风管常用规格（mm） 风管边长 120 320 800 2000 4000 160 400 1000 2500 — 200 500 1250 3000 — 250 630 1600 3500 — 表2.0.10-2 圆形风管规格（mm） 风管直径 基本系列 辅助系列 基本系列 辅助系列 3 风管制作 3.1 一般规定 3.1.1 金属板材应符合下列规定： 1 钢板表面应平整光滑，厚度应均匀，不得有裂纹结疤等缺陷，其材质应符合现行国家标准《优质碳素结构钢冷轧薄钢板和钢带》GB 13237或《优质碳素结构钢热轧薄钢板和钢带》GB 710的规定。 2 镀锌钢板（带）宜选用机械咬合类，镀锌层为100号以上（双面三点试验平均值不应小于100g／m2）的材料，其材质应符合现行国家标准《连续热镀锌薄钢板和钢带》GB2518的规定。 3 不锈钢板应采用奥氏体不锈钢材料，其表面不得有明显的划痕、刮伤、斑痕和凹穴等缺陷，材质应符合现行国家标准《不锈钢冷轧钢板》GB 3280的规定。 4 铝板应采用纯铝板或防锈铝合金板，其表面不得有明显的划痕、刮伤、斑痕和凹穴等缺陷，材质应符合现行国家标准《铝及铝合金轧制板材》GB／T 3880的规定。 3.1.2 金属型钢应分别符合现行国家标准《热轧等边角钢尺寸、外形、重量及允许偏差》GB 9787、《热轧扁钢尺寸、外形、重量及允许偏差》GB 704、《热轧槽钢尺寸、外形、重量及允许偏差》GB 707和《热轧圆钢和方钢尺寸、外形、重量及允许偏差》GB 702的规定。 3.1.3 非金属风管材料应符合下列规定： 1 非金属风管材料的燃烧性能应符合现行国家标准《建筑材料燃烧性能分级方法》GB 8624中不燃A级或难燃B1级的规定。 2 复合材料的表层铝箔材质应符合现行国家标准《工业用纯铝箔》GB 3198的规定，厚度不应小于0.06mm。当铝箔层复合有增强材料时，其厚度不应小于0.012mm。 3 复合板材的复合层应粘接牢固，板材外表面单面的分层、塌凹等缺陷不得大于6‰，内部绝热材料不得裸露在外。 4 铝箔热敏、压敏胶带和胶粘剂的燃烧性能应符合难燃B1级，并应在使用期限内。胶粘剂应与风管材质相匹配，且应符合环保要求。 5 铝箔压敏、热敏胶带的宽度不应小于50mm。铝箔厚度不应小于0.045mm。铝箔压敏密封胶带180°剥离强度不应低于0.52N／mm。 铝箔热敏胶带熨烫面应有加热到150℃时变色的感温色点。热敏密封胶带180°剥离强度试验时，剥离强度不应低于0.68N／mm。 6 硬聚氯乙烯板材应符合现行国家标准《硬质聚氯乙烯层压板材》GB／T 4454或《硬质聚氯乙烯挤出板材》GB／T 13520的规定。板材的燃烧性能应为难燃B1级。硬聚氯乙烯板材不应有气泡、分层、碳化、变形和裂纹等缺陷。 7 非金属风管板材的技术参数及适用范围应符合表3.1.3的规定。 表3.1.3 非金属风管板材的技术参数及适用范围 风管类别 保温材料密度（kg／m3） 管板厚度（mm） 燃烧性能 强度（MPa） 适用范围 酚醛铝箔复合板风管 ≥60 ≥20 B1级 弯曲强度≥1.05 工作压力小于或等于2000Pa的空调系统及潮湿环境 聚氨酯铝箔复合板风管 ≥45 ≥20 弯曲强度≥1.02 工作压力小于或等于2000Pa的空调系统、洁净系统及潮湿环境 玻璃纤维复合板风管 ≥70 ≥25 — 工作压力小于或等于1000Pa的空调系统 无机玻璃钢 水硬性无机玻璃钢风管 ≤1700 见表3.7.3-1、2、3 A级 弯曲强度≥70 低、中、高压空调及防排烟系统 氯氧镁水泥风管 ≤2000 A级 弯曲强度≥65 硬聚氯乙烯风管 1300～1600 见表3.8.1-1、2 B1级 拉伸强度≥34 洁净室及含酸碱的排风系统 3.1.4 金属风管板材连接形式及适用范围应符合表3.1.4的规定。 表3.1.4 金属风管板材连接形式及适用范围 名称 连接形式 适用范围 单咬口 内平咬口 低、中、高压系统 外平咬口 低、中、高压系统 联合角咬口 低、中、高压系统矩形风管及配件四角咬接 转角咬口 低、中、高压系统矩形风管或配件四角咬接 按扣式咬口 低、中压矩形风管或配件四角咬接低压圆形风管 立咬口 圆、矩形风管横向连接或纵向接缝圆形弯头制作不加铆钉 焊接 见图3.2.1 低、中、高压系统 表3.1.5-1 金属矩形风管连接形式及适用风管边长 连接形式 附件规格（mm） 适用风管边长（mm） 角钢法兰 M6螺栓 L25×3 低压风管 中压风管 高压风管 ≤1250 ≤1000 ≤630 M8螺栓 L30×3 ≤2000 ≤2000 ≤1250 M8螺栓 L40×4 ≤2500 ≤2500 ≤1600 M8螺栓 L50×5 ≤4000 ≤3000 ≤2500 薄钢板法兰 弹簧夹式 插接式 顶丝卡式 弹簧夹板厚度大于或等于1.0mm 顶丝卡厚度大于或等于3mm 顶丝螺丝M8 h＝25、δ1＝0.6 ≤630 ≤630 — h＝25、δ1＝0.75 ≤1000 ≤1000 — h＝30，δ1＝1.0 ≤2000 ≤2000 — h＝40、δ1＝1.2 ≤2000 ≤2000 — 组合式 顶丝卡厚度大于或等于3mm h＝25、δ2＝0.75 ≤2000 ≤2000 — h＝30、δ2＝1.0 ≤2500 ≤2000 — S形插条 平插条 大于风管壁厚度且大于或等于0.75mm ≤630 — — 立插条 大于风管壁厚度且大于或等于0.75mm h≥25 mm ≤1000 — — C形插条 平插条 大于风管壁厚度且大于或等于0.75mm ≤630 ≤450 — 立插条 大于风管壁厚度且大于或等于0.75mm h≥25mm ≤1000 ≤630 — 直角插条 等于风管壁厚度且大于或等于0.75mm ≤630 — — 立联合角形插条 等于风管壁厚度且大于或等于0.75mm h≥25mm ≤1250 — — 立咬口 咬口包边板厚度等于风管壁厚度 h≥25mm ≤1000 ≤630 — 注：h为法兰高度，δ1为风管壁厚度，δ2为组合法兰板厚度。 表3.1.5-2 金属圆形风管连接形式及适用范围 连接形式 附件规格（mm） 连接要求 适用范围 角钢法兰连接 L25×3 L30×3 L40×4 法兰与风管连接采用铆接或焊接 低、中、高压风管 承插连接 普通 — 插入深度大于或等于30mm，应有密封措施 直径小于700mm的低压风管 角钢加固 L25×3 L30×4 插入深度大于或等于20mm，应有密封措施 低、中压风管 压加强筋 — 插入深度大于或等于20mm，应有密封措施 低、中压风管 芯管连接 芯管板厚度大于或等于风管壁厚度 插入深度大于或等于20mm，应有密封措施 低、中压风管 立筋抱箍连接 抱箍板厚度大于或等于风管壁厚度 风管翻边与抱箍应匹配，结合紧固严密 低、中压风管 抱箍连接 抱箍板厚度大于或等于风管壁厚度 管端应对正， 抱箍应居中 低、中压风管 抱箍宽度大于或等于100mm 表3.1.6 非金属矩形风管连接形式及适用范围 非金属风管连接形式 附件材料 适用范围 45°粘接 铝箔胶带 酚醛铝箔复合板风管、聚氨酯铝箔复合板风管 b≤500mm 榫接 铝箔胶带 丙烯酸树脂玻璃纤维复合风管 b≤1800mm 槽形插接连接 PVC 低压风管b≤2000mm 中、高压风管b≤1600mm 工形插接连接 PVC 低压风管b≤2000mm 中、高压风管b≤1600mm 铝合金 b≤3000mm 外套角钢法兰 L25×3 b≤1000mm L30×3 b≤1600mm L40×4 b≤2000mm c形插接法兰 （高度25～30mm） PVC铝合金 b≤1600mm 镀锌板厚度大于或等于1.2mm “h”连接法兰 PVC铝合金 用于风管与阀部件及设备连接 注：b为风管边长。 3.1.5 金属矩形风管连接形式及适用风管边长、圆形风管的连接形式及适用范围应分别符合表3.1.5-1、3.1.5-2规定。 3.1.6 非金属矩形风管连接形式及适用范围应符合表3.1.6的规定。 3.1.7 非金属风管在使用胶粘剂或密封胶带前，应清除风管粘贴处的油渍、水渍、灰尘及杂物等。 3.1.8 风管及法兰制作的允许偏差应符合表3.1.8的规定。 表3.1.8 风管及法兰制作的允许偏差（mm） 风管边长b或直径D 允许偏差 边长或直径偏差 矩形风管表面平面度 矩形风管端口对角线之差 法兰或端口端面平面度 圆形法兰任意正交两直径 金属风管 b（D）≤320 ≤2 ≤10 ≤3 ≤2 ≤2 b（D）＞320 ≤3 非金属风管 b（D）≤320 ≤2 ≤3 ≤3 ≤2 ≤3 320＜b（D）≤2000 ≤3 ≤5 ≤4 ≤4 ≤5 3.2 钢板风管 3.2.1 钢板矩形风管的制作应符合下列要求： 1 矩形风管及其配件的板材厚度不应小于表3.2.1-1的规定。 表3.2.1-1 钢板矩形风管板材厚度（mm） 风管边长b 一般用途风管 除尘系统风管 中、低压系统 高压系统 b≤320 0.5 0.75 1.5 320＜b≤450 0.6 0.75 1.5 450＜b≤630 0.6 0.75 2.0 630＜b≤1000 0.75 1.0 2.0 1000＜b≤1250 1.0 1.0 2.0 1250＜b≤2000 1.0 1.2 按设计 2000＜b≤4000 1.2 按设计 按设计 注：1 本表不适用于地下人防及防火隔墙的预埋管。 2 排烟系统风管的板材厚度可按高压系统选用。 3 特殊除尘系统风管的板材厚度应符合设计要求。 2 镀锌钢板或彩色涂层钢板的拼接，应采用咬接或铆接，且不得有十字形拼接缝。彩色涂层钢板的涂塑面应设在风管内侧，加工时应避免损坏涂塑层，损坏的部分应进行修补。 3 焊接风管可采用搭接、角接和对接三种形式（图3.2.1）。风管焊接前应除锈、除油。焊缝应熔合良好、平整，表面不应有裂纹、焊瘤、穿透的夹渣和气孔等缺陷，焊后的板材变形应矫正，焊渣及飞溅物应清除干净。 壁厚大于1.2mm的风管与法兰的连接可采用连续焊或翻边断续焊。管壁与法兰内口应紧贴，焊缝不得凸出法兰端面，断续焊的焊缝长度宜在30～50mm，间距不应大于50mm。 图3.2.1 焊接风管焊缝位置 4 除尘系统风管与法兰的连接宜采用内侧满焊、外侧间断焊。风管端面距法兰接口平面的距离不应小于5mm。 5 风管加固应符合下列规定： 1）薄钢板法兰风管宜轧制加强筋，加强筋的凸出部分应位于风管外表面，排列间隔应均匀，板面不应有明显的变形。 2）风管的法兰强度低于规定强度时，可采用外加固框和管内支撑进行加固，加固件距风管连接法兰一端的距离不应大于250mm。 3）外加固型材的高度不宜大于风管法兰高度，且间隔应均匀对称，与风管的连接应牢固，螺栓或铆接点的间距不应大于220mm。外加固框的四角处，应连接为一体。 4）风管内支撑加固的排列应整齐、间距应均匀对称，应在支撑件两端的风管受力（压）面处设置专用垫圈。采用管套内支撑时，长度应与风管边长相等。 5）矩形风管刚度等级及加固间距宜按表3.2.1-2、表3.2.1-3、表3.2.1-4、表3.2.1-5、表3.2.1-6进行选择和确定。 表3.2.1-2 矩形风管连接刚度等级 连接形式 附件规格（mm） 刚度等级 角钢法兰 L25×3 F3 L30×3 F4 L40×4 F5 L50×5 F6 薄钢板法兰 弹簧夹式 插接式 顶丝卡式 弹簧夹板厚度大于或等于1.0mm 顶丝卡厚度大于或等于3mm 顶丝螺丝M8 h＝25、δ1＝0.6 Fb1 h＝25、δ1＝0.75 Fb2 h＝30、δ1＝1.0 Fb3 h＝40、δ1＝1.2 Fb4 组合式 h＝25、δ2＝0.75 Fb3 h＝30、δ2＝1.0 Fb4 S形插条 平插条 大于风管壁厚度且大于或等于0.75 F1 立插条 大于风管壁厚度且大于或等于0.75 h≥25 F2