Document oD7LX1e9VRGGmd86DZa4eE4g

Worksheet HAZOP-PC 1.00 Company: DOW CHEMICAL CO. Process: HDPE - POLY B Node: 3 Page: 1 H----------_____________________---------__________-----______--_____------_____-------- Node: 3 Discharge Line from DR-2007 to DR-2008 Parameter: Flow +--------------------- Intention: Transfer Powder |GUIDEWORD DEVIATION! POSSIBLE causes CONSEQUENCES RECOMMENDATIONS BY | No No Flow Rotary feeder Overload DR-2007 Evaluate GH trips. Plug E--2302 max.purge flow. Too high purge. High press.in Break rotary DR-2007 Evaluate rotary KW feeder. valve tripping Fused polymer. the feed. More More Flow None None AsWellAs AsWellAs Reverse flow Water in the dry Flow through RF-2008. recycle solvent. Evaluate vent to GH flare with filter Reverse Reverse Flow +--------------- +--------------- +----------------------------- +------------------------------- +----------------------------- +---- + 00 A 120948 CONFIDENTIAL Worksheet HAZOP-PC 1.00 Company: DOW CHEMICAL CO. Process: HDPE - POLY B Node: 3 Page: 2 ^--------------------- ------------------------------------------------------------------------ ------------------------------------------------------------------------------------t- Node: 3 Discharge Line from DR-2007 to DR-2008 Parameter: Temperature Intention: Assure Dry Powder +------------------ +------------------ +----------------------------------- +------------------------------------- +----------------------------- +---- + GUIDEWORD DEVIATION POSSIBLE CAUSES CONSEQUENCES RECOMMENDATIONS BY | More Less Higher Temp Lower Temp Rotary feeder clearance. Upstream temperature failure. Failure of temp.control. Build up on wall and loss of heat transfer. E-2302 plugged. Too much cold feed. Fuse polymer. Plug line. See no flow. HAZOP temperature control and DR-2007. Solvent wet polymer. Overload continuator. Emission problems. HAZOP DR-2007. Evaluate location of temperature element in line. * * GH DO A 120949 CONFIDENTIAL Worksheet, HAZOP-PC 1.00 Company: DOW CHEMICAL CO. Process: HDPE - POLY B Node: 3 Page: 3 H _--___-------------------------------- ----______ -- _____ ____________ ___ ----------------------- h Node: 3 Discharge Line from DR-2007 to DR-2008 Parameter: Pressure Intention: Less than 1 psig -)------_____--i-------------------i--__________--------- --+--------____________--i----------______-- |GUIDEWORD|DEVIATION| POSSIBLE CAUSES I CONSEQUENCES | RECOMMENDATIONS |BY | +--------------------+-------------------- +---------------------------------------+-----------------------------------------+--------------------------------------- +------+ More Higher DR-2007 Rotary valves leak Alarm high KW Pressure overpressure and Increase pressure. vent line plugs. isopentane load on continuator. Solvent wet powder. +--------------+-------------- +--------------------------- +---------------------------- +--------------------------- +---- + 120950 00 A qENTIMCONF"1 Worksheet HAZOP-PC 1.00 Company: DOW CHEMICAL CO. Process: HDPE - POLY B Node: 3 Page: 4 +---------------------------------------------------------- --------------___________-----------______-------------------------------- -------I- Node: 3 Discharge Line from DR-2007 to DR-2008 Parameter: Composition Intention: Normal Product Ml/Density +------------ |GUIDEWORD DEVIATION POSSIBLE CAUSES CONSEQUENCES RECOMMENDATIONS BY | OtherThan OtherThan Emergency Fused polymer. Write proper RF Comp shutdown. operating Loss of reactor procedures. control. Determine MI and RF density limitations of dryer. +------------------ +------------------ +----------------------------------- +------------------------------------- +----------------------------------- +----- + DO A 120951 CONFIDENTIAL