Document ypxver5jydZ88mQVMp0xkQa1E

Company: DOW CHEMICAL CO. Process: HDPE - POLY B Worksheet HAZOP-PC 1.00 Node: 1 Page: 1 H-------------------------------------------------------------- --------- -------------------------------------------------------------------------------------- --------- ---------------------- ------------------------------------------------ -+ Node: 1 Feed Line HY-2007 to DR-2007 Parameter: Flow Intention: 40 - 90,000 Lb. / Hr. ------------------------ -- -- --I----------------- -- -- -- ----------------------------------------------+ -------------------------- -------------------------------------------- 1-------------- -- -- -- ------------------------ -- --I------------- h |GUIDEWORD|DEVIATION| POSSIBLE CAUSES | CONSEQUENCES | RECOMMENDATIONS |BY | +--------------------- +--------------------- +------------------------------------------+--------------------------------------------+------------------------------------------+-------+ More More Flow Control valve open. Flushes open. Bypass open around hydroclone Loss of HY-2007 overhead flow. Dryer overload. High solvent content in powder, powder entrainment Overhead exchanger fouling. Dryer shutdown on motor overamp. Install meter in hydroclone over head line. Operator training Shutdown feed on high motor amps. GH RF KW Overfill D-2302. Plugged out line with powder will over pressure system. (MDR-2007). Stop feed at high KW pressure. L/L temp.trip is KW in control logic Permit operator interface before train shutdown. KW Less Program HY-2007 bypass to open on loss of over head flow. Less Flow Plug in system. False LI (D-2005) Pump shutdown. Build level in hold tank. Strain out polymer No separation in hydroclone. Look at fail mode on D-2005 LI. Look at LI redundancy. GC KW Bypass HY-2007 on KW low pressure at hydroclone. Evaluate solids BS analyzer. +--------------+--------------+--------------------------- +-----------------------------+--------------------------- +---- + DO A 120944 CONFIDENTIAL Company: DOW CHEMICAL CO. Di-ocess: HDPE - POLY B Worksheet HAZOP-PC 1.00 Node: 1 Page: 2 Node: 1 Feed Line HY-2007 to DR-2007 Parameter: Temperature Intention: 75 -80 Deg. C. GUIDEWORD|DEVIATION! POSSIBLE CAUSES | CONSEQUENCES | RECOMMENDATIONS |BY More Higher Temp Loss of temperature control at reactor. Heat tracing fail Pump cavitation. Polymer in solution. Check max. temp, GC of heat tracing. Less Lower Temp +---------------------- Tracing failure. Idle operation. Low set point. Cold solvent flush. Wax deposition. Operator training RF Solvent wet powder Instrument reading Evaluate flush GC problems. accounting meter. Plugged lines. 00 A 120945 CONFIDENTIAL Worksheet. HAZOP-PC 1.00 Company: DOW CHEMICAL CO. "-ocess: HDPE - POLY B Node: 1 Page: 3 + --------_______ ~ ~ " ------------ ----------- -------------------------- -------------- ----_______ -- -- -- --+ Node: 1 Feed Line HY-2007 to DR-2007 Parameter: Pressure Intention: 140 -170 PSIG H-------------------------------------------------------------------- --------- ______--| ---------- ------------ _____ (----------- |GUIDEWORD|DEVIATION| POSSIBLE CAUSES I CONSEQUENCES | RECOMMENDATIONS |BY | +----------------------+----------------------+-----------------------------------------+--------------------------------------------+-----------------------------------------+-------+ Less Lower Opeeration on Plug due to HAZ0P D-2500 GC Pressure bypass. solvent vaporizing Flow meter plug. See Low Flow. i.e. any Lose % solids restriction. control. D-2500 low press. H----------------- ------H---------------------------1----------_____________--|------------------------| --+ DO A 120946 CONFIDENTIAL