Document G5L0zZr46MVm3o5VBROdw32Xn

REACTIVE CHEMICAL REVIEW 1991,1993,1994 Process Risk Management Poly C Dow Chemical, Louisiana Operations DO A 017854 CONFIDENTIAL. Physical Characteristics of Hydrogen Flammability Limits: 4% - 75% by volume Detonation Range: 20% - 60% by volume Heat of Combustion: 51,600 Btu/lbm Flame Temperature: 2050 Deg C (3722 F) Spontaneous Ignition: 1150 PSIG --> atmosphere Auto-ignition Temperature: 571 Deg C (1060 F) NFPA Hazard Classification Health Hazard (blue).............0 (None) Flammability (red)................. 4 (Rapidly vaporize/burn) Reactivity..................................0 (None) Equipment Design Specifications Material of Construction Design Pressure Design Temperature Piping Specification "N" Carbon Steel 700 PSIG 260 DEG C 700 PSIG @ 500 Deg F ( 600 PSIG RTJ flanges) Procedures New: Pre-Startup Procedures, Filename: H2-P2 Pre and Post-Startup Purging Instructions, H2-P3 Startup Procedures, H2-P4 Hydrogen Fire at the Hydrogen Drying Skid, EMERG-P19 Trouble Shooting Chart, H2-TS1 Modified: Swinging Hamer Blinds, Filename: SAFE-P2 Mixing Calcium Stearate With Bags, CAST-P2 Calcium Stearate Mix Procedure, CAST-P3 Red Tagging D-401/D-402 PSV Removal, CAST-RT1 Charging Absorption Beds, EQUIP-P3 MP0 8-29-91 MANUAL.TXT DOW CONFIDENTIAL DO A 01,7855 CONFIDENTIAL Reactive Chemicals Reactivity with common materials: 1. No chemical reaction, but low temperature causes most materials to become brittle. 2. No known reactions between hydrogen and molecular sieve. 3. Degradation temperature of molecular sieve: 425 - 540 C 4. Theoretical temperature rise upon initial adsorption is 4 - 6 Deg C. 5. Hydrogen embrittlement of carbon steel at temperatures greater than 260 Deg C. Positive Identification of the Hydrogen: 1. Dedicated system at Air Products, wet or dry. 2. On-line Air Products analyzer with 99.5 mole % Hydrogen trip. 3. Nitrogen purge capability is a potential contamination source. However, double block and bleed arrangement is employed as well as adequate procedures. Environmental Hydrogen Composition: H2 02 N2/CH4/AR CL2/ORGANIC CHLORIDES C0/C02 H20 99.0% (MIN) 10 PPMV (MAX) 5000 PPMV (MAX) 1 PPMV (MAX) 10 PPMV (MAX) 100 Deg F dewpoint Regeneration Method: Sources of Discharge: Potential Waste Generation: Closed Loop, Split Stream. No losses to atmosphere. Pressure Relief Valves Condensate from YD-101, Knockout Pot Spent mole sieve, Type 4A. (Plans are to reclaim) MPO 8-29-91 MANUAL.TXT oow CONFIDENTIAL D0 a 017856 CONFIDFNT T Al.