Mechanical Seal Piping Plans - Based on FTA160
Single Seals – Plans 01, 02, 11, 13, 14, 21, 23, 31, 32, 41
Dual Seals – Plans 52, 53A, 53B, 53C, 54
Quench Seals – Plans 62, 65
Gas Seals – Plans 72, 74, 75, 76

Requirements of Mechanical Seals
 Liquid seals
• Stable fluids
• Good lubricating properties
• Fluids do not flash or vaporize in seal chamber
• Free from contamination and solids
• Moderate viscosities
 Gas seals
• Gas or vapor suitable for sealing
• Constant supply of external buffer/barrier gas
• Process fluids free from contamination from both liquids and solids
• Process fluids which are not adversely affected by gas leakage

Purpose of Piping Plans
Improve the environment for the mechanical seal
• Flush to remove heat
• Lower fluid temperature
• Alter seal chamber pressure
• Increase vapor pressure margin
• Isolate the seal from process fluids
• Clean the process fluid
• Control atmospheric side of seal
• Introduce fluid from outside the process
 Provide a means of detecting and controlling seal leakage
• Capture and/or prevent leakage
• Detect leakage
• Route leakage to appropriate collection or disposal system
• Provide fluid other than process fluid for the seal environment 

Methods of Achieving Goals
 Piping or routing of process fluids
 Introduction of external fluids
 Auxiliary equipment
• Seal coolers
• Cyclone separators
• Reservoirs
 Instrumentation

Link download tài liệu: API Piping Plan Flipbook