原文：
1范围 本标准规定了机械型、热静力型和热动力型蒸汽疏水阀的术语、结构长度和标志的一般要求。 本标准适用于公称压力PN16～160，公称通径DN15～150的蒸汽疏水阀。 2规范性引用文件 下列文件中的条款通过本标准的引用而成为本标准的条款。凡是注日期的引用文件，其随后所有的修改单（不包括勘误的内容）或修订版均不适用于本标准，然而，鼓励根据本标准达成协议的各方研究是否可使用这些文件的{zx1}版本。凡是不注日期的引用文件，其{zx1}版本适用于本标准。 GB/T12247蒸汽疏水阀分类（GB/T12247—1989，idtISO6704：1982） 3术语 下列术语和定义适用于本标准。 3.1有关压力的术语 3.1.1 {zg}允许压力maximumallowablepressure 在给定温度下蒸汽疏水阀壳体能够持久承受的{zg}压力。 3.1.2 工作压力operatingpressure 在工作条件下蒸汽疏水阀进口端的压力。 3.1.3 {zg}工作压力maximumoperatingpressure 在正确动作条件下，蒸汽疏水阀进口端的{zg}压力，它由制造厂给定。 3.1.4 {zd1}工作压力minimumoperatingpressure 在正确动作情况下，蒸汽疏水阀进口端的{zd1}压力。 3.1.5 工作背压operatingbackpressure 在工作条件下，蒸汽疏水阀出口端的压力。 3.1.6 {zg}工作背压maximumoperatingbackpressure 在{zg}工作压力下，能正确动作时蒸汽疏水阀出口端的{zg}压力。 3.1.7 背压率rateofbackpressure 工作背压与工作压力的百分比。 3.1.8 {zg}背压率maximumrateofbackpressure {zg}工作背压与{zg}工作压力的百分比。 3.1.9 工作压差operatingdifferentialpressure 工作压力与工作背压的差值。 3.1.10 {zd0}压差maximumdifferentialpressure 工作压力与工作背压的{zd0}差值。 3.1.11 最小压差minimumdifferentialpressure 工作压力与工作背压的最小差值。 3.2有关温度的术语 3.2.1 工作温度operatingtemperature 在工作条件下蒸汽疏水阀进口端的温度。 3.2.2 {zg}工作温度maximumoperatingtemperature 与{zg}工作压力相对应的饱和温度。 3.2.3 {zg}允许温度maximumallowabletemperature 在给定压力下蒸汽疏水阀壳体能持久承受的{zg}温度。 3.2.4 开阀温度openingvalvetemperature 在排水温度试验时，蒸汽疏水阀开启时的进口温度。 3.2.5 关阀温度closingvalvetemperature 在排水温度试验时，蒸汽疏水阀关闭时的进口温度。 3.2.6 排水温度temperatureatdischargingcondensate 蒸汽疏水阀能连续排放热凝结水的温度。 3.2.7 {zg}排水温度maximumtemperatureatdischargingcondensate 在{zg}工作压力下蒸汽疏水阀能连续排放热凝结水的{zg}温度。 3.2.8 过冷度subcooledtemperature 凝结水温度与相应压力下饱和温度之差的{jd1}值。 3.2.9 开阀过冷度subcooledtemperatureofopenvalve 开阀温度与相应压力下饱和温度之差的{jd1}值。 3.2.10 关阀过冷度subcooledtemperatureofclosevalve 关阀温度与相应压力下饱和温度之差的{jd1}值。 3.2.11 {zd0}过冷度maximumsubcooledtemperature 开阀过冷度中的{zd0}值。 3.2.12 最小过冷度minimumsubcooledtemperature 关阀过冷度中的{zd0}值。 3.3有关排量的术语 3.3.1 冷凝结水排量coldcondensatecapacity 在给定压差和20℃条件下蒸汽疏水阀一小时内能排出凝结水的{zd0}重量。 3.3.2 热凝结水排量hotcondensatecapacity 在给定压差和温度下蒸汽疏水阀一小时内能排出凝结水的{zd0}重量。 3.4有关漏汽量和负荷率的术语 3.4.1 漏汽量steamloss 单位时间内蒸汽疏水阀漏出新鲜蒸汽的量。 3.4.2 无负荷漏汽量no-loadsteamloss 蒸汽疏水阀前处于xx饱和蒸汽条件下的漏汽量。 3.4.3 有负荷漏汽量loadsteamloss 给定负荷率下蒸汽疏水阀的漏汽量。 3.4.4 无负荷漏汽率rateofno-loadsteamloss 无负荷漏汽量与相应压力下{zd0}热凝结水排量的百分比。 3.4.5 有负荷漏汽率rateofloadsteamloss 有负荷漏汽量与试验时间内实际热凝结水排量的百分比。 3.4.6 负荷率rateofloadcondensate 试验时间内的实际热凝结水排量与试验压力下{zd0}热凝结水排量的百分比。 4结构长度 4.1分类 蒸汽疏水阀的分类按GB/T12247的规定。 4.2结构长度 4.2.1法兰连接蒸汽疏水阀的结构长度，其尺寸按表1，极限偏差按表2的规定。 表1法兰连接蒸汽疏水阀结构长度单位为毫米 公称通径 DN 结构长度系列 1 2 3 4 5 6 7 8 15 150 170 175 210 230 250 290 480 20 195 25 160 210 215 230 310 380 580 32 230 270 245 320 350 270 450 40 260 420 280 490 680 50 265 500 290 560 65 290 340 410 450 550 572 580 — 80 310 380 430 100 350 430 460 520 125 400 500 600 — — — 150 480 550 700 表2法兰连接蒸汽疏水阀结构长度极限偏差单位为毫米 L 极限偏差 ≤250 ±2 >250～500 ±3 >500～800 ±4 4.2.2内螺纹连接和承插焊连接蒸汽疏水阀的结构长度L见图2，其尺寸按表3，极限偏差按表4的规定。 表3内螺纹连接和承插焊连接蒸汽疏水阀的结构长度单位为毫米 公称通径 DN 结构长度系列 1 2 3 4 5 6 7 8 15 65 75 80 90 110 120 130 150 20 75 85 90 100 25 85 95 100 120 120 40 110 130 120 140 270 — 50 120 140 130 160 300 表4内螺纹连接和承插焊连接蒸汽疏水阀的结构长度极限偏差单位为毫米 L 极限偏差 ≤150 ±1.6 >150～300 ±2 5标志 5.1标志位置 5.1.1蒸汽疏水阀的标志可设在阀体上，也可标在标牌上，标牌必须与阀体或阀盖牢固固定。 5.1.2标志不得被覆盖。 5.2必须使用的标志 a）产品型号； b）公称通径； c）公称压力； d）制造厂名称和商标； e）介质流动方向的指示箭头； f）{zg}工作压力； g）{zg}工作温度。 5.3可选择使用的标志 a）阀体材料； b）{zg}允许压力； c）{zg}允许温度； d）{zg}排水温度； e）出厂编号、日期。 5.4上述各项标志若已标在阀体上也可以重复标在标牌上。 5.5只要不与上述标志混淆，还可附加其他标志。

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译文：
1 Scope This standard specifies the mechanical type, thermal static type and dynamic type steam traps heat term, the structure length and signs of general requirements. This standard applies to nominal pressure PN16 ~ 160, nominal diameter DN15 ~ 150 of the steam traps. 2 Normative references The terms of the following documents by the standard reference in the provisions of this standard. Fan Shi dated reference documents, all of its subsequent amendments (not including corrigenda) or revised edition are not applicable to this standard, however, 鼓励 Genju parties to agreements of this standard research whether 这些 the latest versions of . For undated reference documents, the latest versions apply to this standard. GB/T12247 steam traps (GB/T12247-1989, idtISO6704: 1982) 3 terms The following terms and definitions apply to this standard. 3.1 The terms pressure 3.1.1 Maximum allowable pressure maximumallowablepressure At a given temperature steam trap housing can withstand the maximum pressure sustained. 3.1.2 Working pressure operatingpressure Working conditions in the steam trap inlet pressure. 3.1.3 Maximum working pressure maximumoperatingpressure Movement in the right conditions, the maximum steam trap inlet pressure, it is given by the manufacturer. 3.1.4 Minimum working pressure minimumoperatingpressure Movement in the right circumstances, the minimum inlet steam trap pressure. 3.1.5 Working back pressure operatingbackpressure Working conditions, steam trap outlet pressure. 3.1.6 Maximum operating back pressure maximumoperatingbackpressure The maximum working pressure, steam traps can function correctly when the maximum outlet pressure. 3.1.7 Back pressure rate rateofbackpressure Working back pressure and the percentage of working pressure. 3.1.8 The maximum back pressure ratio maximumrateofbackpressure Maximum operating back pressure and the percentage of the maximum working pressure. 3.1.9 Working pressure operatingdifferentialpressure Work stress and work back pressure difference. 3.1.10 Maximum pressure maximumdifferentialpressure Work stress and the maximum back pressure difference. 3.1.11 Minimum pressure minimumdifferentialpressure Work stress and the minimum back pressure difference. 3.2 the temperature of the terms 3.2.1 Operating temperature operatingtemperature Working conditions in the steam trap inlet temperature. 3.2.2 Maximum working temperature maximumoperatingtemperature And maximum working pressure corresponding saturation temperature. 3.2.3 Maximum allowable temperature maximumallowabletemperature In a given case under pressure from the steam trap can be durable to withstand the highest temperatures. 3.2.4 Open valve temperature openingvalvetemperature Water temperature in the test, the steam trap opens when the inlet temperature. 3.2.5 Off valve temperature closingvalvetemperature Water temperature in the test, shut down when steam trap inlet temperature. 3.2.6 Water temperature temperatureatdischargingcondensate Steam trap to discharge hot condensate continuous temperature. 3.2.7 The maximum water temperature maximumtemperatureatdischargingcondensate Maximum working pressure in the steam trap to discharge hot condensate continuous maximum temperature. 3.2.8 Undercooling subcooledtemperature Condensate temperature and pressure corresponding saturation temperature difference between the absolute value. 3.2.9 Open valve undercooling subcooledtemperatureofopenvalve Valve opening pressure corresponding saturation temperature and the temperature difference of absolute value. 3.2.10 Undercooling subcooledtemperatureofclosevalve off valve Off valve under the pressure corresponding saturation temperature and the temperature difference of the absolute value. 3.2.11 Maximum undercooling maximumsubcooledtemperature Open valve in the maximum undercooling. 3.2.12 Minimum undercooling minimumsubcooledtemperature Off valve in the maximum undercooling. 3.3 Terms relating to emissions 3.3.1 Cold condensate displacement coldcondensatecapacity At a given pressure and 20 ℃, within an hour of steam traps discharge condensate to the maximum weight. 3.3.2 Hot condensate displacement hotcondensatecapacity At a given pressure and temperature within one hour of steam traps discharge condensate to the maximum weight. 3.4 Steam Leakage and the loading rate terms 3.4.1 Steam Leakage steamloss Leaking steam traps per unit time the amount of fresh steam. 3.4.2 No Load leakage of steam no-loadsteamloss Before the steam trap is completely under the conditions of saturated steam Steam Leakage. 3.4.3 Steam Leakage loadsteamloss the Load Under a given load rate of leakage steam trap steam. 3.4.4 Steam leakage rate of no load rateofno-loadsteamloss No load leakage under the pressure of steam and the corresponding maximum thermal condensation of water displacement percentage. 3.4.5 A load of steam leakage rate rateofloadsteamloss Steam Leakage with load test of time and the actual percentage of thermal condensation of water displacement. 3.4.6 Load rate rateofloadcondensate The actual test time, hot condensate water displacement and the maximum test pressure of the percentage of thermal condensation of water displacement. 4 Structure of Length 4.1 Classification Classification of Steam Traps by GB/T12247 requirements. 4.2 Structure of the length 4.2.1 Flanged Steam Traps structure length, its size according to Table 1, limit the provisions of deviations according to table 2. Table 1 flanged steam traps in millimeters Nominal diameter DN structure of the length of series 12,345,678 15 150 170 175 210,230,250,290,480 20195 25 160 210 215,230,310,380,580 32 230 270 245,320,350,270,450 40 260,420,280,490,680 50265500290560 65 290 340 410,450,550,572,580 - 80 310 380 430 100,350,430,460,520 125 400 500 600 - - - 150 480 550 700 Table 2 flanged steam traps Tolerance in millimeters L Tolerance ≤ 250 ± 2 > 250 ~ 500 ± 3 > 500 ~ 800 ± 4 4.2.2 thread connecting and socket weld connections steam trap shown in Figure 2, the structure of length L, its size according to Table 3, the limit deviations provided in Table 4. Table 3 of the socket welding threaded connections and the structure connecting the length of steam traps in millimeters Nominal Path DN structure length series 12,345,678 1,565,758,090,110,120,130 150 20758590100 258,595,100,120,120 40 110,130,120,140,270 - 50 120,140,130,160,300 Table 4 internal thread connection and socket welding to connect the structure of the steam trap length limit deviation in millimeters L Tolerance ≤ 150 ± 1.6 > 150 ~ 300 ± 2 5 marks 5.1 The location of signs 5.1.1 Steam Traps signs to be located on the body can also be marked on the label, the label must be firmly fixed valve body or valve cover. 5.1.2 marks may not be overwritten. 5.2 must use the symbol a) Model; b) nominal diameter; c) nominal pressure; d) the name and trademark of manufacturer; e) the direction of medium flow direction arrows; f) maximum working pressure; g) The maximum operating temperature. 5.3 optional use of the mark a) body material; b) the maximum allowable pressure; c) the maximum allowable temperature; d) maximum water temperature; e) factory number, date. 5.4 The above signs if it has also marked the valve plate can be re-marked. 5.5 as long as no confusion with the mark, but also add other symbols.