Document 2R0v6j9bZo0gjK0dgdKYbN1DL

984 , ,; ; - ( ' > !: S.<- ' - H' B fBc ` tf ' ' A- . , s. ,;s 9 B < s o c H <| B og C o . jk a i - . b "aS S Is &4 - i A 1 ;- A < :.f. - '. u .2 5a . 2 . *To3- . S. oohi CHAPTER 46 * U .<-[ .31 O* .W0 ; 1 : 1: ! j \\ sd "i_. ,^-i (.. . <5*. d - .-* r a . S 3|-'8 : .513 ao o:_ -il- all-' w 1111 od 2 'Ein' *.S: F " 'S' Aaa 2.2C52 ", Sts ' o 'o >>a> . . 4,8 ' ' ` , sr .c3c,,sq Abrasive bias shot) Asbestos Carding Spool windi Barrels--D ru ing materia CeDrarmy icpsa'n ..D ry press * Aerographi Fettling, b and unlo oo A .'*52 'a <a .8 -a : tai 3 OS'S *8 3 39 "a s -o' - e 3w38>> If -A ao a 1 ao E -S'S ll w o. 12 D -2 3S 5 M ...a5aB o b . i A & T3 , o S b. : .,CAQ,; r. < Ez? *e- z& w o. <s s sI ^ O a fa g 00 hS P P5 "2 ze 2 "e 5 1W2 O ^ < gs ,B 5 , T a b le 2. r Local Regul o < j S5a5 > -. :P$ gs -j8 <P >ai > .1 /E ' .h < 13 .o a Eh si 1 p 5M S3 1 1 * o u D1 tao 3 8*-. S.S *3 s. as T ig h t enclos openings Enclosure Local Hoods B ooth or en spillage hoi Local Hood Booth ' Hood at transfer point -Connect to b feed point. Local Hood Booth w ith si . Enclosure Local a t die . Local a t die A t supply bi B o o th D o w n d ra ft c a &a a 3 S'. "o 3' . Jf b3', A 1 "3 A 1c i s ja 2 $3 60*100 fp m dow ndraft (long roo(ns of tunnel proportions 100 fp m cross-draft) 20 a ir changes per m inute b u t not less than 500 fp m through a ll openings 800 cfm per machine 50 cfm per spool' Paper bags--100 cfm C loth bags--200 cfm per per sq sq ff tt open area open'area 100 cfm /sq f t of container cross section' 100 fp m a t face ' B e lt speeds less th a n 200 fpm-350 cfm per foot of belt w id th , b u t not less than 150 fp m through' open area. B e lt speeds over 200 fp m --500 cfm per foot of belt w id th b u t not less than 200 fp m through open area 150-200 fp m through open area a t feed points ; 10 cfm per sq f t of elevator casing cross- section1 500 cfm 150 fp m a t face 200 fp m through a ll openings 500 cfm 500 cfm 500 cfm 100 fp m (face) 100-150 ctm per sq ft of plan area of dust producing operation 88S :,k8 oo -s 3500 3500 3000 3000 3500 3500 3500, 3500 3500 3500 3500 3500 i S.S 8 8 P5 O 'sill -'uS-'ia m a . ^Ta3. fi- 1 Ref. 17 . Ref. 18 Ref.' 7, Control sa.5sJ " . . CrO* ' . * : > 1 n ' a-g o 8 A 3.3' -> 8 fa 3. 4> 28 31953 Guide ; -v; : *0 ' .0.2 IndustrialExhaust Systems a. S 02 a <s 09 ae S -JS M^ p <y H < P 'l g .t? ft lM_l J<5Ja^ O ^3 &I H3 fe. fa *13 g g ' ^2 Je ' 5a < J S ^3 e Se ` 1O 3 Ssfa .+ aa 2 H Ba s a *%< aH< - ^8 gw D> .2 <5 ao B2a > 2fa 1 E Z3 >1 8 B $ 2 & 'a O to as . "e B n <z H1 tcs Sa< - aa O c> 8 - .2 Jr8$? ' T -s.vilr - ^ `111 " ': cS W 1 8 o a Eh : Cooling Tunnels (fo u n d ry molds Crushers and grinders Furnaces - S ta tio n a ry m elting pots for noi fe rro u s.. T iltin g or rooking m e ltin g f non-ferrous E le c tric A rc for Steel Forge (hand) Garage (ta il pipe a t servicing loc tion) *aa3 .3woa -taoa3 w-oOo g. .- 2 Ao 3 3ahi Enclosure ; *3 to roof ring h. a o fa A8 oao 3Jg. 0 T3 oo3 *oo3 AA 33 a' J 3 2it 2 "3 g .**38*a3 c5Sow* Granite cutting and finishing Pneumatic hand tools Surfacing maohine Grinders Polishers, buffers, etc. ' Portable Swing fram e Booth Booth Kitchen range 8 ua Laboratory hood (provide w it door) Metails ing fa a Ma afa *o3 J ' 3 il. o* :>w5o5.: a * co< 'J o gS .? J- -- e*s oco s ' - aa o o. J s A .a a. 100 cfm th ru 3-in. fle: 200 cfm th ru 4-in. Q 300 cfm th ru 4|-in. fle engines. oS. h. o See Table 3 .. Bench ty grille bu p t e n , 2-400 ot less ct of plan working an 100 fp m a t face 100-200 fp m in d ra ft booth faoe . 100 fp m a t hood face 001-08 200 fp m a t hood face 125*200 fp m a t booth a 3 "2 -a 'a 3a 2. L. .;l 1 &o "3 a -a ' o3 : A g s s fa cr*8 -a | a'4 IIXa aa la& ^ -i`5 8? 3-Q o3 .-sS-f sfl -8 & . aa ,'a 1 abe <o ' HI a 5 cr M^ h 5 . | "3a _a 8 i i ooo oo S2 n ii 1 oc* IQ 2 2- : O 2 ' o .a &>o a O o> s f.-ll, 13, 21, 23, 24. . higher ventilation rate mes tilation rate can be mat iced w ith more complete eral ventilation of m elting substituted but involv creased ve n tila tio n rate 23 . ,. .................. , Ref. CO .a CO T ec a 1 ft ' 1 cHo : "*3 .1 1 u' a om.3h. M.2 "tj f>t><C oO fan X NOmOO e3 2 P5 M00 & ss 3500 3500 3000 3500 3000 Pa fa2 * 813g 8 *3 ga. :a"s . C4 It ' = S3 3 s <a s 23,' 29. A ir su p p ly loca tical very og *C i* ---- *3 'a2 11 * a 3 8 11 985 "S a. 22 8 *"33 C 0 .a a -2 as 1 fl i '> WC Afl" J g 2