仪表安装标准.pdfVIP

1.1 INSTRUMENTS INSTALLATION STANDARD 仪表安装标准 All instruments shall be close coupled where possible or mounted as close to the process connection as possible to minimize the length of the impulse line without compromising the accessibility of the instrument. The location of instruments shall be so that direct drainage of condensate, water or process fluids from adjacent equipment has no adverse effect. 所有仪表的连接要尽可能的紧密，尽量靠近工艺接头，减少冲击管的长度，但 不影响出入仪表维护通道。仪表位置应可直接将相邻设备的冷凝、水或工艺流 体排泄，从而不会产生不利影响。 All field instruments, process taps and associated control equipment shall be readily accessible for repair or adjustment from grade, fixed platform or fixed walkway. A rolling platform may be used where free access is available to the space below the instrument. A fixed ladder may be used for transmitters, gauges etc. but is not suitable for in-line instruments such as valves and flowmeters. Local indicating instruments shall be located such that scales are readable both from the access point and from where related equipment is operated or where primary instruments are tested or calibrated. Instruments shall not be located in a manner which interferes with a ladder, platform, walkway or operating area. 所有现场仪表、工艺取压接头和有关控制设备，应可以在地面、固定平台或固 定人行通道随时靠近维修或调节。如果仪表下方有空间的话，可以使用一个可 移动平台对仪表进行维修。可以用固定的梯子来维修变送器和压力表等，但不 能用于在线仪表，例如阀门和流量计。现场仪表的位置应便于读取仪表刻度， 从检修通道、设备操作位置、或试验或校对一次仪表的地方都可以读取。仪表 的布置位置不应碰到梯子、平台、通道或操作区域。 Pressure and differential pressure instruments shall be located above the taps for gas, boiling liquids and noncondensable vapors and below the taps