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
常见的PID图例缩写符号
