Document e5V9kqEXNrpQLMnjQVBZezx3y

>* 'v s -<*7 GENERALATOMICCOMPANYajjte... P.O. BOX 81608 TM SAN DIEGO, CALIFORNIA 92138 - (714) 453-1000 L June 27, 1974 Ref. RTC 74:106 Mr. Wilbur T. C. Shyeh Co.u*Fen Factory HWA-HSIA' Road Tou-Fen,, Miao- m*lii^TuHrr siVei nk ,^.TIjiiia^irwnaarifniiwr. ^RfReeppuubblicc^^of China 1 - - 1- -- liear Mr. Shyeh: ^ *. ,, "I'arn very pleased with the completeness and speed which you have shown following my recommendations concerning industrial hygiene aspects of China Gulf Plastics Plants. Following are some comments which you may want to consider when com - -.A pleting your program. Elep-trolytic Cell Building: 1. Wall fans vs removal of windows: I would think that the instal./ivlation of six wall fans should provide more air exchange to the - ``Electrolytic Cell Building than the removal of windows and ex panding the roof to keep the rain from getting into the cell room. Besides, with wall fans we have more flexibility in the control of ventilation capacity. .2 Exhaust system for end box of cells: Based on the blower capacity (900 M^/min) and number of cells (36), the exhaust capacity for each cell (head and end boxes together) will be 880 cfm. The resulting friction loss in the very long 2" and 3" pipelines would be too large for the blower to handle. Since mercury vapor con centrations were much lower at the head boxes than at the end boxes, and since the head boxes are near the windows, it may be adequate to just exhaust the end boxes only, thereby eliminating the long pipelines leading to the head boxes. Also, it is sug gested to use 4" to 6" pipelines to reduce friction loss. Size the exhaust capacity based on slot velocity of 1500 to 2000 feet per minute. . -\ Instead of al 2" diameter: VP-pipe loop, you may try to use a slotted *'-Y suction^pip e`^oon^,,^pem^siH^^^th'^end^boxi^fhisrw. woouuicidi^^prorovviidde equally `<> ( vV'1^ r dfv 3SW" OK*.* . r-^rr^ T. fft^f^MiTiTTi mrfii CUSAROSS 00460 June 27, 1974 2- - RTC 74:106 effective control because the end boxes are only about 1 foot wide. Do not use the 100 Horsepower, 900 M^/min (32000 cfm) , 230 mm Aq blower unless you really need that kind of exhaust capacity. You may be able to size a much smaller but adequate blower and save 1/2 to 3/4 of the electricity bill. PVC Leather and Film Plants: The solvent control system as shown on your Drawing No. 2 for single color print machine is not clear. I wonder what the driving force is to move air through the galvanized iron sheet suction loops and through the flexible steel pipes to the existing canopy hood. It appears that the moving air through those suction holes and small pipes would create a very large pressure drop, say 3" water, yet the suction pressure available at the top of the canopy hood (as shown on your Figure 2) could not be more than 0.5" water. Six & Four-Color Printer; A complicated solvent vapor control system as shown on your Drawing No. 3 needs very detailed calculation on the system pressure loss and system balance before any sheet metal construction. Since solvent vapors are evaporated from ink troughs, rollers, and the travelling fabrics, essentially the whole space occupied by the printers can be considered as vapor producing source. Therefore, what counts most is the total ventilation capacity of the exhaust system. Try to avoid the use of small suction pipes and pick-up slots which tend to limit the exhaust capacity and increase the system pressure drops. Showers & Eye Wash Fountains: Relating to your decision on not to purchase emergency showers and eye-wash fountains, but to design them in plant by the Utilities and Maintenance Department, I have attached some drawings of this type of equipment for your design reference. RTC:mm Attachments cc: Dr. R. L. Gibson S. P, Lo H. E. Runion lS" CUSAROSS 00461 t / * , S' srt~ns,]r , / m&mx&f > a -* /X 7X^ a-ir,uJ^<AUL- fLctx.et Zi't/nt.irH-'t*-- -ezy*-* etU y-4^//^ 7"^ jt/,i^C ttttaZ* JV-: Duct ftv- a,,f ' .* u V O' **-vj(v\'i*--,V WH/ >f -X l`l^o . ., WJ/UjD& fZeX/BLE Hoi_e -; ol xw \\ {/A/IVJ//DT f\ / D YO-U)ninn t A/o.3> //VK TROUGH / J` Sc^d1-iC c/rw/AJf- Sol ye ATT Controt&r $ fsOGie CGt-OrK. pfLtAST MAC R/AS *- | ',>J"V-r-" . V* 'i\-' 1 -'- */,. ->>^'vApib fS.WVIt-1 >- i r*t y 't 1 -*v ' I4*' *f>*>*>; f ' JU ^ .. .- -j -' > <*W'| A x.lnf , -I-, A.' ti \>, ' #-* -tv - .- - . -t,** r-ft-i'l <- * CUSAROSS 00462 eWK* bC-'- O ;'a a j S'. / V /' - ,- - a>,v?; -o*. ,,`v< * "'') (..''j*^sif CUSAROSS 00463 ^, ***-' .' BfSdley has the know-how you need when you're . looking for safety fixtures. They've been putting** --m ^Washtoi/ptajns andshowers*frtftvashroorns for more <** than fiftyyears. And experience like that pays off for you in the safety field. Choose the safety station for your plant from the complete line of Bradley Safety Fixtures shown here. Emergency drench showers that provide an even flood of water for complete body coverage. Instant rinsing action. Eyewash fountains that bathe eyes and face with a soft stream of aerated water. Or combination Series Emen^n^ Drencli *-vY **>* drenc^shower/eyewaslt unit^You'll find a unit to match yo'urwork-area heeds. wv**- Safety FixtuT$3h?SrTvBradIey providet^dependable way to quickly eliminate harmful chemicals and particles from the face or body. Prevent costly disabilities and satisfy OSHA requirements for drenching andtflushing facilities. When ^our work-area requires instant availability of safety equipment, choose the name you can depend on. Bradley. Contact your Bradley representative. (See back page for the one nearest you.) He'll help you select the right safety fixture for your plant. Model SJOOO-F yellow AB$ plastic aaliagee;. i FreerSUndm&J 5" diameter witlytt Interior hellcat-si^r coil and diffuser ModeiSliOO-H supply Model SI20Q-V Vertical supply sameasS1000-F ' arranged for horizontal r supply Same as SI000-F arranged for vertical \ * supply Chrome plated brass 1* ball valve push w-- Optional self-closing valve -- Suffix* SC**" Same as S1000-F Same as S1Q00-F IK' schedule 80 galvanized steel of eye-wash fountain at later date. Provision for vertical or horizontal supply^ , IK' IPS pressure for adequate water c0nd*15 PSI same as S1000-F - same as ^Siooo-F same as SI000-F same as S1000-F Bradley 2000 Series Emergency Eye-Wash Fountains Model S2000 (Unmounted) Receptor heavy gauge type 302 satin finish stainless steel Heads twin aerated eye-wash heads Vsfve-- -- " K' stay-open ball valve manually operated by stainless steel push-flag handle Modal S2130-W Wall m^untpij Same as S200Q Same as S2000 Valve and fittings chrome plated. Same e* $2000 Stream Control 3 g.p.m. Same as S20Q0 SuppV ""'V A IPS Same as S2000 Waste...... ^~r-::r,r Flat gnd strainer, spud and nut for 1 K" tail-piece provided Tailpiece and trap to conform to local codes by others Same as S2QGG ' Wall Bracket.. P . none Heavy gauge satm finish stainless stce! with two 5/16 x IK' clearance slots for mounting bolts by others. * Approximately 45 lbs.** Approximately 10 lbs. Approximately 8 lbs Shipping Weight Approximately 10 lbs Approximate!1/ / `2 lbs. Model S2200-F free Standing Same as S200Q Same as S2000 Same as $2000 Same as S2000 Same as S2000 Same as S2000 IK" galvanized steel pipe with 9' diameter floor flange. IK' waste tee Approximately 26 lbs Bradley 3000 Series Combination Eye-Wash/Drench Shower trench Shower unit Eye VJ.ish unit Shower Head ' Drencfi Column '' Valve V '-rsijriairdT^ Yellow ABS plastic. 8* dta with interior helical coil and diffuser 12- to 14- Receptor Heads V * Valves -1- Chrome plated brass 1" ball valve, pull --open push--close Optional self-closing valve Suffix SC available. Stream ' ' "* _ Control IK' schedule 30 galvanized steel pipe with 9" dia floor flange. Heavy gauge type 302 satm finish stainless steel twm aerated eye-wash heads /" stay-open ball valve manually operated by stainless steel pusbflag handle: 3 g.p.m. Standard includes fittings which allow (or vertical or horizontal supply. Valve and fittings chrome plated. IK' IPS Minimum inlet pressure for adequate water cone* 15 PSI f y Shipping Weigh! 1 A" Approximately 60 lbs *OOd- V5 oc/3 < C/5 P U ** * Bradley 1000 Series Emergency Drench Showers Model SlQOO-F Emergency Drench Showeri-Free Standing Model S1000-F Emergency Drench Shower--Free Standing Bradley Drench Showers provide an instant, continuous source of water m emergency situations. High visioiiity. yellow ABS plastic shower head delivers drench column of water 12 to 14 inches in diameter--meets federal specifications for spread of,^^ water cone. Chrome plated brass .1" ball valve,,,.,.... operated by rigid pull-rod, stays i open for continuous supply during panic use. Optional self-closing i-valve available for use in high vandalism areas. Standard includes fittings for addition of eye-wash fountain at later date And provides for vertical or horizontal supply. Bradley 2009 Series Emergency Eye-V/ssh Fountains n^.UL 5 i/?- m 4 3* r-ar ' if** * * >** a* *&, -c -C* IW.IjjMJIll ,dl&l $iit>90Ms ? 1'fJil*5fVTTSl.fW1 'rTI"O''M*lUr'^ -J % ' ' -ter wJWi-r V -* Model S21CO-W ///all mounieu, Model S2100-W (Wall mounted) With the touch of a handle, Bradleys Eye-Wash Fountains direct twin streams of soft aerated water to the eyes Irritants are flushed out in seconds Stream flow control assures safe, steady flow under varying water supply conditions Receptor is heavy gauge satin finish stainless steel Valve and fittings are chrome plated J Available in wait mounted or free standing models Eradlsy 3900 Series Combination Model S30C0 Eye-Wash/Drench Shower Combination Eye-YVash-Drench Shower Bradley's most complete safety station Provides the dual benefit of eyewash and drench shower --all in a single location Each unit operates separately Both provide emeigency aid A Drench Shower gives immediate total body coverage Delivers drench column 12 to 14 inches in diameter--meets federal requirements for spread of water cone Chrome plated brass 1" ball valve is operated by rigid pull-rod. Stays open for continuous supply during panic usecOptional self-closing valve--- available.. .. ......................... - -- - Stainless steel're'c'eptor bowl contains twin aerated eyewash heads !?' stay-open ball valve is manually opeiatuu by easily accessiQle stainless steel ous.h-flag handle Streams of soft, aerated water flush.out harmful particles Or chemicals `it- r.hxici SCOOP ConiDination Eye-Wash-Drench Shower Stream flow control assures sale, stesdy.flow under varying water supply conditions. Standard includes,,filffiigs which allow provision al vertical or lioiricsStuI supply f f ` '1 V ,d 'J \itfr **> CUSAROSS 00465