Miscellaneous1Designation2s代号图例一览 COR: Center of Range 量程中心
DA: Aeration3 Point Using Air 空气吹扫点 DG: Aeration Point Using Gas 瓦斯吹扫点 DN: Aeration Point Using Nitrogen 氮气吹扫点 DS: Aeration Point Using Steam 蒸汽吹扫点 INS: Insulate 隔热
LCV: Steam Trap-Ball float type 浮球式蒸汽疏水阀 PSE: Rupture Disc Assembly 爆破片 PTP: Pipe tap Plugged 丝堵
PWHT: Postweld Heat Treat 焊后热处理 RO: Restriction Orifice 限流孔板 SN: Sample Number 采样点 VB: Vortex4 Breaker 防涡流挡板
WISI: Winterize5 With Heat Trace Between Spacer and Insulation 伴热 XCV: Steam Trap–All Traps other than Ball float type 非浮球式蒸汽疏水阀
Base Line 基线
1
Miscellaneous：混杂的，各种各样的 Designation：名称，称呼；任命，选派 Aeration：通风，吹气 Vortex：漩涡，涡流 Winterize：为过冬做准备
2
3
4
5
Drain funnel with water seal control or optional closed drain
system with closed venting to an emission6 control device per US EPA Regulations.带水封控制的漏斗或可选按照美国EPA标准制造的带密闭排放至排放设备的密闭排放系统。
PSV: Pressure Relief System 安全阀
Free draining requirement denotes Non-pocketed, gravity
flow line with indicated direction of flow.自流要求无袋形，是按照指定方向流动的重力流。
Spectacle7 blind 八字盲板 Y type Strainer Y型过滤器
T type Strainer T型过滤器
Basket type Strainer 篮式过滤器
Letters on strainers Designate过滤器上字母含义
XN: Type 316 stainless steel internals in compliance with NACE MR0103按照NACE MR0103标准的316不锈钢内部件
General line style designations一般线型含义
Primary piping主要管线 Secondary piping次要管线
6
Emission：发出散发（辐射）排放 Spectacle：壮观的场面或情境；眼镜
7
Piping and equipment shown on other P and I diagrams
其他PID图上的管线和设备
Future piping and equipment预留管线和设备
Heat trace and insulate to main temperature as indicated
in degrees Fahrenheit8 or Centigrade维持指定温度的伴热线
Distribute Control Shared Display Symbols DCS符号含义
Shared display device with limited access to adjustments 屏幕
显示，调节权限受限
Shared display indicator, controller, or other device with
operator access to adjustments 屏幕显示、指示、控制，有操作员调节权限。
Software alarms with shared display device * is
measured variable 屏幕指示报警*是测量变量。
Critical software alarm * is measured variable 紧急软报警 Critical shutdown alarm 紧急停车报警
Logic system with limited access to adjustment具有调节权限
的逻辑系统
Function Identification9函数定义
8
Fahrenheit：华氏温度的
Refer to list below for identification参照下列定义
9
Identification：定义，辨别，鉴定
General instrument symbols一般仪表符号
instrument located in field就地安装仪表
instrument mount10ed on local panel就地盘面安装仪表
instrument mounted on console11 or panel12盘面或台面安装
仪表
10
Mount：安装，设置 Console：控制台，仪表板 Panel：面板，仪表板
11
12