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10秒装修报价 装修要花多少钱?获得精准报价,省钱30%
168211
元
材料费:77201元
人工费:86544元
设计费:1760元
质检费:2706元
第4.3.1条 可燃气体、液化烃、可燃液体的金属管道除需要采用法兰连接外,均应采用焊接连接。公称直径等于或小于25mm的上述管道和阀门采用锥管螺纹连接时,除含氢氟*等产生缝隙的腐蚀性介质管道外,应在螺纹处采用密封焊。
第4.3.2条 可燃气体、液化烃、可燃液体的管道,不得穿过与其无关的建筑物。
第4.3.3条 可燃气体、液化烃、可燃液体的采样管道,不应引入化验室。
第4.3.4条 可燃气体、液化烃、可燃液体的管道,应架空或沿地敷设.必须采用管沟敷设时,应采取防止气液在管沟内积聚的措施,并在进、出装置及厂房处密封隔断;管沟内的污水,应经水封井排入生产污水管道。
第4.3.5条 工艺和公用工程管道共架多层敷设时,宜将介质温度等于或高于250℃的管道布置在上层;液化烃及腐蚀性介质管道布置在下层;必须布置在下层的介质温度等于或高于250℃的管道,可布置在外侧,但不应与液化烃管道相邻。
第4.3.6条 氧气管道与可燃气体、液化烃、可燃液体的管道共架敷设时,氧气管道应布置在一侧,与上述管道之间宜用公用工程管道隔开,或保持不小于250mm的净距。
第4.3.7条 公用工程管道与可燃气体、液化烃、可燃液体的管道或设备连接时,应满足下列要求:
一、在连续使用的公用工程管道上应设止回阀,并在其根部设切断阀;
二、在间歇使用的公用工程管道上应设两道切断阀,并在两阀间设检查阀。
第4.3.8条 连续*作的可燃气体管道的低点,应设两道排液阀,排出的液体应排放至密闭系统;仅在开停工时使用的排液阀,可设一道阀门并加螺纹堵头或盲板。
第4.3.9条 可燃气体压缩机、离心式可燃液体泵在停电、停汽或*作不正常情况下,介质倒流可能造成事故时,应在其出口管道上安装止回阀。
第4.3.10条 加热炉*气调节阀前的管道压力等于或小于0.4MPa(表),且无低压自动保护仪表时,应在每个*气调节阀与加热炉之间设置阻火器。
第4.3.11条 加热炉*气管道上的分液罐的凝液,不应敞开排放。
第4.3.12条 进、出装置的可燃气体、液化烃、可燃液体的管道,在装置的边界处应设隔断阀和8字盲板,在隔断阀处应设平台,长度等于或大于8m的平台,应在两个方向设梯。
7.4 液化石油气管道系统
7.4.1 液化石油气管道应选用10号、20号钢或具有同等性能材料的无缝钢管,其技术性能应符合现行*标准《输送流体用无缝钢管》GB 8163的规定。管件应与管子材质相同。
7.4.2 管道上的阀门及其他金属配件的材质应为碳素钢。
7.4.3 液化石油气管道组成件的设计压力不应小于2.5MPa。
7.4.4 管子与管子、管子与管件、(弯头、三通、大小头等)的连接应采用焊接。
7.4.5 管道与储罐、容器、设备及阀门的连接宜采用法兰连接。
7.4.6 管道系统上的胶管应采用耐液化石油气腐蚀的钢丝缠绕高压胶管,压力等级不应小于6.4MPa。
气体管路的安装要求:
1.所有气体管路都由高质量的、完全退火型、无缝连接的不锈钢管(B*)组成。铜管只使用在气体管路的末端,对气体纯度要求不是太严格的地方。(比如通风柜)。
2.气体管道不得和电缆、导电线路同架铺设。
3.易燃气体,如乙炔需要和其他气体分开单独引入。氢气管道若与其他可燃气体管道平行敷设时,其间距不应小于0.5M;交叉敷设时间距不应小于0.25M。分层敷设时氢气管道应位于上方。
4.压缩空气在管路上有过滤杂质和水分的净化装置,此净化装置需要并联一路,用单独的阀门隔离,以方便对过滤装置进行维修。
5.高纯气体管路的连接为无缝焊接。连接到阀门或调节装置时才可以使用接头配件。
6.每个实验室都要有单独的控制阀、减压阀和压力表。
7.引到工作台的气体管路要安装单独的控制阀。工作台上要均匀排放各种气体的控制阀门。在氦气管路前面建议安装气体净化装置。
8.每隔1.5米左右,气体管路就需要有支架。另外根据气体管路弯曲的半径,设置合适的支架位置。所有弯曲处都要有支撑。气体管路所有的支架都要进行镀锌防腐处理。
气体管道安装工程要求:(一)最高工作压力大于或者等于0.1MPa(表压,下同)的; (二)公称直径(注1)大于25mm的;
注1:公称直径即公称通径、公称尺寸,代号一般用DN表示。 《压力管道元件*许可规则》:本规则所称公称直径根据相关标准,依据不同的管材、管件,可以指公称外径、公称内径、通径和口径、公称尺寸。
(三)输送介质为气体、蒸汽、液化气体、最高工作温度高于或者等于其标准沸点的液体或者可燃、易爆、有毒、有腐蚀性的液体的。
根据原劳动部《压力管道安全管理与监察规定》和质检总局《压力容器压力管道设计许可规则》TSG R1001-2008的定义,工业管道是指企业、事业单位所属的用于输送工艺介质的工艺管道、公用工程管道及其他辅助管道。