文档介绍：API Piping Plans
API 冲洗方案
November 2004
JC Tianjin Training
Module
Seal Environment 密封环境
1
API Piping Plans API 冲洗方案
Integral (internal) recirculation
from pump discharge to seal
内部循环从泵的出口到密封
Advantage 优点
- No external piping 没有外部冲洗
Limitations 局限性
- Changing flow rate
required dismantling of pump
改变流量需要拆泵
- For clean pumpages only 只能是适用干净的介质
API Piping Plans API 冲洗方案
Points to Note for API Plan 02: API 02 冲洗方案应注意的事项:
The injection tapping is used for venting prior to start–up. -在开车前,入口用来进行放空
API plan 02 is often used together with plan 62, especially on high temperature bellows ,特别是用在高温波纹管密封
API Piping Plans API 冲洗方案
No flushing to the mechanical seal (‘dead-ended’)
机械密封里没有冲洗
Points to Note for API Plan 11: API 冲洗方案11 应注意的事项
- Use an orifice to restrict the flow rate if the discharge pressure is 3 bar higher than seal chamber ,需要用一个孔板限制流量
- Use on clean and low abrasives duties用在干净,含磨蚀性颗粒少的工矿
API Piping Plans API 冲洗方案
Seal Flushing By-Pass from Discharge
单密封通过出口进行冲洗
Recirculation from seal chamber through a flow control orifice and back to pump suction从密封腔里出,通过一个孔板返回到泵的入口
Points to Note for API Plan 13:
API 冲洗方案 13 应注意的事项
- Use an orifice to restrict the flow rate if the seal chamber pressure is 3 bar higher than suction ,需要用一个孔限制流量
- handle abrasives duty better than API plan 11处理含有磨石性颗粒的工矿13方案好于11方案
- higher seal chamber pressure to suppress vaporisation较高的密封腔压力可抑制它的汽化
API Piping Plans API 冲洗方案
+
=
Points to Note for API Plan 14: API 冲洗方案 14 应注意的事项:
- Flow back to suction side will evacuate vapours that may collect in seal chamber.
- mended for light hydrocarbon service.
API Piping Plans API 冲洗方案
Recirculation from pump discharge
through a flow control orifice and cooler to seal
Open Loop Cooling Circuit
Cooling Water Outlet冷水出口
Cooling Water Inlet冷水入口
API Piping Plans API 冲洗方案
Recirculation from a pumping ring in the seal chamber through cooler and back t