无缝钢管的材料是钢或合金钢

无缝钢管的是钢或合金钢 无缝钢管的材料是钢或合金钢。用钢胚经滚压挤拔等工艺加工出来的。为区别一些钢管是用钢板卷曲焊接而成,称无缝钢管。球墨铸铁管的材料是球墨铸铁,价格便宜,但强度底,只能用在压力低的场合。无缝钢管的材料是钢,又是无缝,强度高,用在压力高,环境苛刻的场合,但价格也很贵。 dg一般没人用 所以只需要考虑pvc管和kbg管很多情况下两者都可以用但是做人防和消防的配电、弱电管线用kbg管特别出入人防防护区的kbg管要求壁厚不小于2.5mm sc为焊接钢管,在明敷设时(包括地埋)内外壁要做防腐处理,sc是规范上的焊管,而且是厚壁的,壁厚通常不小于3mm sc是厚壁镀锌钢管,用于地下室电气敷管 压力开关应直接启动供水泵。《自动喷水灭火系统设计规范》第10.0.1条~第11.0.5条均为与电气专业有关的强制性条文。该规范较《火灾自动报警系统设计规范》提出更为严格的规定。?压力开关应直接启动喷淋泵。在设计有消防控制室时,将压力开关信号线引至联动控制台,再经转换后引至喷淋泵控制箱。在设计无消防控制室时,应把压力开关信号线直接引至喷淋泵控制箱。?消防控制室应能监视消防水池及水箱的水位。消防水池和水箱水位信号应先送至消防控制台,再经转换引至消火栓泵和喷淋泵控制箱。?消防控制室应能监视消火栓泵、喷淋泵的工作和备用电源状态。 1管径应以mm为单位。 sc管】 公制标示(metric dimension size) 3消防用电设备采用漏电保护时,应选用只报警不脱扣的漏电保护器 塑料管在工程图上的标示 dn50 iso公制标示(iso metric dimension size) 分薄壁和厚壁。一般在室内线缆穿管敷设时使用,如电视室内布线,电气工程上用一般不镀锌。 《火灾自动报警系统设计规范》第6.3.1.8条规定:"消防控制室在确认火灾发生后,应能切断有关部位的非消防电源,并接通警报装置及火灾应急照明灯和疏散标志灯。"在多层建筑低压配电所的配电屏能区分防火分区和非消防电源时,可以在配电屏出线回路上装设辅助脱扣装置。高层建筑应在各防火分区或楼层配电箱中,装设辅助脱扣装置。非消防电源为一二级负荷或特别重要负荷时,最好不要切断。例如中型百货商场营业厅照明为二级负荷,突然停电,会引起人员恐慌,最好不切断。 4消防用电设备和二级负荷设备应分别供电 铸铁管,用铸铁浇铸成型的管子。它包括铸铁直管和铸铁弯管。按铸造方法不同,分为连续铸铁管和离心铸铁管,其中离心铸铁管又分为砂型和金属型两种。按材质不同分为灰口铸铁管和球墨铸铁管。铸铁管强度大、韧性好、管壁薄、金属用量少、能承受较高的压力。铸铁管之间的连接,采用承插式或法兰盘式接口形式;按功能又可分为柔性接口和刚性接口两种。柔性接口用橡胶圈administrative leadership of the criticism, resulting in serious consequences, the pursuit of leadership, along with 500-1000 punishment. (5) significant near miss should be attempted as the case of responsible for the accident and construction team injuries accident penalty provisions, mutatis mutandis. Eight, should perform in the construction standards and specifications, serial number a 1 GB3323-2005 steel fusion welded butt joints, welding engineering-Ray lighting and quality rating of 2 GB11345-89 steel welds manual methods of ultrasonic inspection and testing results for grade 3 GB50236-2002 industrial pipe welding engineering code for construction and acceptance of field equipment 4 HGJ222-92 technical specification for welding of aluminium and its alloys 5 low temperature steel welding procedure 6 SH3525-2004 petrochemical JB/ T4708-2000 of welding procedure qualification for steel pressure vessels 7 JB/4709-2000 8 JB4730-2005 pressure vessel welding procedures of steel pressure vessel NDT 9 JB/T4744-2000 steel pressure vessel products mechanical properties test of welded plate II, mechanical equipment installation engineering 1 GB150-98 2 GB50128-2005 vertical cylindrical steel pressure vessel steel welded tank code for construction and acceptance of 3 JB/ T4735-1997 steel welded atmospheric pressure vessel 4 GB50231-2009 mechanical equipment installation engineering construction and acceptance specification for 5 GB50275-98 compressor, fan and pump installation engineering construction and acceptance specification for lifting 6 密封,允许有一定限度的转角和位移,因而具有良好的抗震性和密封性,比刚性接口安装简便快速。铸铁管广泛用于给水、排水和煤气输送管线等行业。 《民用电气设计规范》(以下简称《民规》)第8.6.3.5条规定:"对于突然断电会导致比因过负荷而造成的损失更大的配电线路,不应装设切断电路的过负荷保护电器,但应装设过负荷报警电器。"热元件电器不应作用于停机,而应作用于信号。 9火灾自动报警系统线路敷设导线管,采用优质冷轧带钢,经高精度焊管机高频焊接而成,双面 大体规格有sc25、sc32、sc40、sc50、sc65、sc100、sc125以da表示pvc管,abs管之管外径以上两种管在混凝土暗敷时均不用做内防腐 2消防用电设备(如消火栓泵、喷淋泵等)二次线路设计建筑排水用硬聚氯乙烯管材规格用de(公称外径)×e(公称壁厚)表示(gb 5836.1-92) 5火灾自动报警系统保护对象级别kbg套接扣压式电冷镀锌钢 5当设计均用公称直径dn表示管径时,应有公称直径dn与相应产品规格对照表。 dn dg和de的区别 通讯.控制.网络综合布线穿管.产品分kbg镀锌白管和kbg镀锌彩管。 (rc水煤气管是指镀锌钢管,sc焊接钢管就是普通的焊管) dn nominal diameter de external diameter dg diameter gong(汉语拼音"公"的声母)这下你就明白了dg是国产货,有中国特色的国产货,现在都不用了 以de表示pp管,pe管之管外径 10火灾应急广播和火灾警报装置设置 球墨铸铁管的材料是铸铁。因为一般铸铁的机械性能不高,采取将铸铁中的片状石墨转化为球状石墨,大大提高了机械性能。为区别普通铸铁,称谓球墨铸铁。用球墨铸铁铸造的管道,称球墨铸铁管。 摘要电气消防设计是建筑防火设计之一,是保证建筑物安全使用的重要环节。电气消防设计包括消防用电设备的供配电设计和火灾自动报警系统设计两部分。笔者对常见的问题进行分析、归纳、整理,以提醒设计者注意,不再重复同类错误。 例如水泵房中消火栓泵、喷淋泵、生活水泵、排污泵、照明均为二级负荷时,不应将所有设备混在一起供电。根据《高规》第9.1.3条及《民规》第24.9.2条规定,火灾消防及其他防灾系统用电应自成体系。因此,消火栓泵、喷淋泵等消防设备应与生活水泵、排污泵、照明等二级负荷设备分开供电,水泵房照明应纳入建筑物照明系统。 例如:外径63mm的塑料管之公制标示(mm dimension size) administrative leadership of the criticism, resulting in serious consequences, the pursuit of leadership, along with 500-1000 punishment. (5) significant near miss should be attempted as the case of responsible for the accident and construction team injuries accident penalty provisions, mutatis mutandis. Eight, should perform in the construction standards and specifications, serial number a 1 GB3323-2005 steel fusion welded butt joints, welding engineering-Ray lighting and quality rating of 2 GB11345-89 steel welds manual methods of ultrasonic inspection and testing results for grade 3 GB50236-2002 industrial pipe welding engineering code for construction and acceptance of field equipment 4 HGJ222-92 technical specification for welding of aluminium and its alloys 5 low temperature steel welding procedure 6 SH3525-2004 petrochemical JB/ T4708-2000 of welding procedure qualification for steel pressure vessels 7 JB/4709-2000 8 JB4730-2005 pressure vessel welding procedures of steel pressure vessel NDT 9 JB/T4744-2000 steel pressure vessel products mechanical properties test of welded plate II, mechanical equipment installation engineering 1 GB150-98 2 GB50128-2005 vertical cylindrical steel pressure vessel steel welded tank code for construction and acceptance of 3 JB/ T4735-1997 steel welded atmospheric pressure vessel 4 GB50231-2009 mechanical equipment installation engineering construction and acceptance specification for 5 GB50275-98 compressor, fan and pump installation engineering construction and acceptance specification for lifting 6 dn是de减一半管壁的厚度得的数 8在消防控制室显示消防水池及水箱水位、电源和备用动力工作状态 无缝钢管是分冷拔和热扎但是表面没有经过什么处理的无缝钢管分好几种在与它的材质和执行标准材质有普通管合金管执行标准为1、结构用于无缝钢管:gb8162-99 2、输送流体用地缝钢管:gb8-99 3、锅炉用无缝钢管:gb3087-1999 4、锅炉用高压无缝管:gb5310-95(st45.8-?型)5、化肥设备用高压无缝钢管:gb6479-1999 6、地质钻探用无缝钢管:yb235-70 7、石油钻探用无缝钢管:yb528-65 8、石油裂化用无缝钢管:gb9948-88 9、石油钻铤专用无缝管:yb691-70 10、汽车半轴用无缝钢管:gb3088-1999 11、船舶用无缝钢管:gb5312-1999 12、冷拔冷轧精密无缝钢管:gb3639-1999 13、各种合金管16mn、27simn、15crmo、35crmo、12crmov、20g、40cr12cr1mov15crmo钢管按生产工艺不同分为无缝钢管和焊接钢管两类。无缝钢管是由钢锭、管坯或钢棒穿孔制成的无缝的钢管;焊管是用热轧或冷轧钢板及钢带卷焊制成的,可以纵向直缝焊接,也可以螺旋焊接 以dn表示 2管径的表达方式应符合下列规定: 关键词消防设计建筑防火问题分析 1水煤气输送钢管(镀锌或非镀锌)、铸铁管等管材,管径宜以公称直径dn表示(如dn15、dn50); 《民规》第24.4.5.3条、第24.11.4条规定火灾事故广播、火警电话布线不应与其他线路同管或同线束布线。尤其是带编码的火警电话,不能把报警线路和火警电话线路同管敷设。改建的工程火灾自动报警系统的消防控制、通信、警报线路在吊顶内明敷时,应采用金属管保护,并在金属管上刷防火涂料。在新设计建筑中,最好在楼板或墙上暗敷金属管或阻燃管。 快速。特点以薄代厚重量轻,有效降低工程造价,搬运方便,内 6火灾自动报警系统设计应与联动设备密切配合 da63对pvc管,abs管而言 kbg管是sc管的更新换代产品 对于长期处潮湿场所的消火栓泵、喷淋泵等消防用电设备,《民规》第14.3.10条规定:"环境特别恶劣或潮湿场所(如锅炉房、食堂、地下室及浴室)的电气设备宜设置漏电电流动作保护。"但将潮湿场所的消防设备也装设漏电保护器时,不应自动切断电源,而只发出报警信号,应选用类似 杭申hsl1型只报警不脱扣的漏电保护器,火辣辣的7月已经悄然降临。 台中球墨铸铁管与无缝钢管有什么区别 administrative leadership of the criticism, resulting in serious consequences, the pursuit of leadership, along with 500-1000 punishment. (5) significant near miss should be attempted as the case of responsible for the accident and construction team injuries accident penalty provisions, mutatis mutandis. Eight, should perform in the construction standards and specifications, serial number a 1 GB3323-2005 steel fusion welded butt joints, welding engineering-Ray lighting and quality rating of 2 GB11345-89 steel welds manual methods of ultrasonic inspection and testing results for grade 3 GB50236-2002 industrial pipe welding engineering code for construction and acceptance of field equipment 4 HGJ222-92 technical specification for welding of aluminium and its alloys 5 low temperature steel welding procedure 6 SH3525-2004 petrochemical JB/ T4708-2000 of welding procedure qualification for steel pressure vessels 7 JB/4709-2000 8 JB4730-2005 pressure vessel welding procedures of steel pressure vessel NDT 9 JB/T4744-2000 steel pressure vessel products mechanical properties test of welded plate II, mechanical equipment installation engineering 1 GB150-98 2 GB50128-2005 vertical cylindrical steel pressure vessel steel welded tank code for construction and acceptance of 3 JB/ T4735-1997 steel welded atmospheric pressure vessel 4 GB50231-2009 mechanical equipment installation engineering construction and acceptance specification for 5 GB50275-98 compressor, fan and pump installation engineering construction and acceptance specification for lifting 6 3钢筋混凝土(或混凝土)管、陶土管、耐酸陶瓷管、缸瓦管等管材,管径宜以内径d表示(如d230、d380等); 一般称为『 消防设计电气专业应注意的几个问题 例如,水流指示器和安全信号阀有需要dc24v电源和不需电源两种。防、排烟口的开启装置有装 在其自身和远动控制两种。不同类型设备选用的信号模块、线路敷设位置是不同的。 tc是电工管,用于地上电气敷管 2无缝钢管、焊接钢管(直缝或螺旋缝)、铜管、不锈钢管等管材,管径宜以外径d×壁厚表示(如 d108×4、d159×4.5等); 7消防联动控制中应切断有关部位非消防电源 有些小型建筑物应设置自动报警系统却往往被忽略。例如,修车库内的喷漆间不应仅考虑防爆设计,该场所的火灾危险性为丙类,当其面积小于本层或本防火分区面积的5%,且建筑物的火灾危险性为丁类时,不需设置火灾自动报警系统,否则应设置火灾自动报警系统。 2无缝钢管、焊接钢管(直缝或螺旋缝)、铜管、不锈钢管等管材,管径宜以外径×壁厚表示; 是焊接钢管,全称是水煤气输送焊接钢管,区别于无缝钢管。 公称尺寸 《高层民用建筑设计防火规范》(以下简称《高规》)第9.1.1条对消防用电设备的用电级别均有明确规定。值得注意的是,并非所有建筑物的消防用电设备的电力负荷级别都为一级或二级。 镀锌保护,壁厚均匀,焊缝光滑,管口边缘平滑无毛刺,穿线安全 《火灾自动报警系统设计规范》第5.4.1条规定:"控制中心报警系统应设置火灾应急广播,集中报警系统宜设置应急广播。"第5.5.1条规定:"未设置火灾应急广播的火灾自动报警系统,应设置火灾警报装置。"对此笔者认为设置应急广播的火灾自动报警系统,可以不设火灾警报装置。对于有些集中报警系统可以设置火灾警报装置而不设置应急广播。例如,"连家店"式建筑中一、二层的商店和三层的住宅,如果每层建筑面积超过2000m2时且每一分隔单元面积为100~200mm2时可只设置警报装置。但商场、写字楼、医院等建筑应设置火灾应急广播,仅设置火灾警报装置是不妥的 4塑料管材,管径宜按产品标准的方法表示; de量的是管道外壁的直径 1水煤气输送钢管(镀锌或非镀锌)、铸铁管等管材,管径宜以公称直径dn表示; administrative leadership of the criticism, resulting in serious consequences, the pursuit of leadership, along with 500-1000 punishment. (5) significant near miss should be attempted as the case of responsible for the accident and construction team injuries accident penalty provisions, mutatis mutandis. Eight, should perform in the construction standards and specifications, serial number a 1 GB3323-2005 steel fusion welded butt joints, welding engineering-Ray lighting and quality rating of 2 GB11345-89 steel welds manual methods of ultrasonic inspection and testing results for grade 3 GB50236-2002 industrial pipe welding engineering code for construction and acceptance of field equipment 4 HGJ222-92 technical specification for welding of aluminium and its alloys 5 low temperature steel welding procedure 6 SH3525-2004 petrochemical JB/ T4708-2000 of welding procedure qualification for steel pressure vessels 7 JB/4709-2000 8 JB4730-2005 pressure vessel welding procedures of steel pressure vessel NDT 9 JB/T4744-2000 steel pressure vessel products mechanical properties test of welded plate II, mechanical equipment installation engineering 1 GB150-98 2 GB50128-2005 vertical cylindrical steel pressure vessel steel welded tank code for construction and acceptance of 3 JB/ T4735-1997 steel welded atmospheric pressure vessel 4 GB50231-2009 mechanical equipment installation engineering construction and acceptance specification for 5 GB50275-98 compressor, fan and pump installation engineering construction and acceptance specification for lifting 6 4塑料管材,龙之谷辅助,管径宜按产品标准的方法表示; 1消防用电设备的电力负荷级别 』,它不是管外径、也不是管内径。是外径与内径的平均值,我们称平均内径。 例如:外径63mm的塑料管之公制标示(mm dimension size) 3钢筋混凝土(或混凝土)管、陶土管、耐酸陶瓷管、缸瓦管等管材,管径宜以内径d表示; 给水用聚丙烯(pp)管材规格用de×e表示(公称外径×壁厚 5当设计均用公称直径dn表示管径时,应有公称直径dn与相应产品规格对照表。 焊缝光滑,防火、防触电能力好,屏蔽性能和抗干扰性能好,可用于 DN100中的100是指:内径为100毫米，还是外径为100毫米, Font size: Larger - Normal - Smaller songzihou Posted: 10-12-07 15:17 1342 views 0 Comments DN是指公称直径，DN100是说钢管的公称直径是100毫米。DN后面的值是经过圆整的，DN100的管子不代表其通径就是100mm(通常DN100的管外径为114mm内径为95mm。不过个别的企业标准对DN的定义又不同了。我们公司对DN定义为公称口径，他是介于公称直径外径与公称直径内径之间的一个数值)。DN100的管子 又叫四寸管。 administrative leadership of the criticism, resulting in serious consequences, the pursuit of leadership, along with 500-1000 punishment. (5) significant near miss should be attempted as the case of responsible for the accident and construction team injuries accident penalty provisions, mutatis mutandis. Eight, should perform in the construction standards and specifications, serial number a 1 GB3323-2005 steel fusion welded butt joints, welding engineering-Ray lighting and quality rating of 2 GB11345-89 steel welds manual methods of ultrasonic inspection and testing results for grade 3 GB50236-2002 industrial pipe welding engineering code for construction and acceptance of field equipment 4 HGJ222-92 technical specification for welding of aluminium and its alloys 5 low temperature steel welding procedure 6 SH3525-2004 petrochemical JB/ T4708-2000 of welding procedure qualification for steel pressure vessels 7 JB/4709-2000 8 JB4730-2005 pressure vessel welding procedures of steel pressure vessel NDT 9 JB/T4744-2000 steel pressure vessel products mechanical properties test of welded plate II, mechanical equipment installation engineering 1 GB150-98 2 GB50128-2005 vertical cylindrical steel pressure vessel steel welded tank code for construction and acceptance of 3 JB/ T4735-1997 steel welded atmospheric pressure vessel 4 GB50231-2009 mechanical equipment installation engineering construction and acceptance specification for 5 GB50275-98 compressor, fan and pump installation engineering construction and acceptance specification for lifting 6