常见的PID图例缩写符号

正常情况下无流量 NO NORMALLY OPEN 正常情况下打开 S SAMPLE CONNECTION 取样点

SC SAMPLE CONNECTION WITH COOLER 连接冷却器的取样点 SOR START OF RUN 开始运行 SR STRAINER 过滤器

SS SAFETY SHOWER

安全喷淋

T LINE DRIP TRAP 疏水器

TSO TIGHT SHUT OFF 密闭切断

UC UTILITY CONNECTION 公用工程接口

LINES MAIN LINE 主线

SECONDARY LINE 副线

UNDERGROUND OR BURY 地下或隐藏

ELECTRICALLY TRACED

6

电缆线

SPECIAL TRACED 特殊管线

STEAM TRACED 蒸汽伴热 JACKETED 夹套

PACKAGED EQUIP BOUNDARY 成套设备分界线

BATTERY LIMIT BOUNDARY 界区分界线 FUTURE 未来

MATERIAL SPEC BREAK 材料规格分界点 DESIGN BREAK 设计分界点

BELOW GROUND LINE RISING ABOVE 地管伸出点

BREAK OF REPONSIBILITY 责任分界点

MISCELLANEOUS ITEMS 各种细节

ROD OUT CONNECTION

CLEAN OUT CONNECTION (FLUSHING) 清理接口（冲洗） REMOVABLE SPOOL 可拆除短管

GRADE 7

NOZZLE OR PIPE WITH BLIND FLANGE 带盲法兰的喷嘴或管线 SPACER FOR BLIND 盲管位置

NORMALLY CLOSED 正常情况下关闭 NORMALLY OPEN 正常情况下打开 FIGURE B B 图

REVERSIBLE BLIND 8字盲板

ORIFICE SWAGE 孔板

INSULATED FLANGED JOINT 保温法兰连接

PIPE CAP (WELDED) 管帽（焊接）

PIPE CAP (SCREWED) 管帽（法兰） REDUCER 变径管 T-STRAINER T型过滤器

PERMANENT Y-STRAINER (WITH 带阀门Y型过滤器 TEMPORARY STRAINER 临时过滤器

HOSE CONNECTION

VALVE) 8

软管接口

SAMPLE CONNECTION 取样口

**-SERVICE SYMBOL 符号说明

SEQUENCE NUMBER 序列号

OPEN DRAIN HUB 敞口集液器

MATERIAL BALANCE STREAM 物流号

CONTINUTY ARROW 延续箭头 INITIAL FEED 初始进料 GRADE 等级 TRENCH 地沟

LINE IDENTIFICATION 管线说明

INSULATION CODE 保温代码

MATERIAL SPECIFICATION 材质

BRANCH IDENTIFIER 分支标识

SEQUENCE NUMBER

NUMBER 9

管线号

PROCESS SECTION AREA(MAY BE SINGLE DIGIT) 工艺区

LINE SERVICE SYMBOL 管线符号说明 LINE SIZE 管线尺寸 VALVES GATE VALVE 闸阀

BUTTERFLY VALVE 蝶阀

DIAPHRAGM VALVE 隔膜阀

GLOBE VALVE 球阀

NEEDLE VALVE 针型阀 PLUG VALVE 截止阀 BALL VALVE 球阀

CHECK VALVE 止逆阀

STOP CHECK VALVE(BOILER 带手轮止逆阀

THREE 0R FOUR VALVE

NON-RETURN VALVE) 10