Reducer Suction Pump System

Generally, the pump inlet nozzle size is smaller than the suction line size. Therefore, usually, the reducer is required on suction pump nozzle. What the appropriate type of reducer should be applied ? Eccentric or Concentric ?

Pump Suction Strainer

For pump protection, inlet line suction pump should be fitted with a strainer. The strainer can be either T or Y type, permanent or only for temporary. For clean fluid service, such as; demineralized water, boiler feed water, etc the temporary strainer can be used..

Suction Pump Block Valve

Block valve shall be provided on suction and discharge line of pump. The block valve is required for isolation purpose during maintenance. In this posting, we will discuss about the block valve on suction pump. The block valve is not required for suction pump where pump maintenance can be performed without isolating the suction side.

System Separator

My friend, in this posting, I will share my experience in checking the typical separator system or pressure vessel system. This check list is only general rule or general engineering practice. as we know, each project has a specific requirements, so this guideline should be modified as per specific requirement.

Basic Depressuring - Why 15 minutes ?

In previous posting, we have discussed that PSV wouldn’t provide adequate protection for vessel of fire case. Therefore, depressuring can be applied for another safety layer.

Commonly the plant area is divided into the ESD Zone. Each ESD zone may contain one or more equipments. ESDV or SDV valves are provided in each ESD Zone to isolate the system zone. In case of fire, a system will be isolated by those SDV valves. Then the inventory fluid (commonly gas phase only) in the system will be released to flare through BDV valve. Commonly one BDV is provided for one system zone, but in some cases, it is possible to provide more than one BDVs in one system zone.