Document ybky8ybM2p0NVYgb7rLOJkvgr
NOISE CONTROL JUNE 28, 1983
SUBJECT: UTILIZING MUFFLERS IN TANK CAR CLEANING/RAILROAD DEPARTMENT
DISTRIBUTION:
J. E. CAMPBELL - INDUSTRIAL RELATIONS/MATERIALS HANDLING pTj: PREJEAN^ - RAILROAD
.ELLIS GEORGE
TANK CAR CLEANING
CHARLIE HALPHEN- INDUSTRIAL HYGIENE
DANNIE KENNEDY - INDUSTRIAL HYGIENE
JOHN MCBRIDE
SAFETY
00 082733 CONFIDENTIAL
OBJECTIVES: 1. SAFETY A. TO PROTECT AND INSURE THE PHYSICAL WELFARE OF EMPLOYEES B. TO PROVIDE BETTER AND MORE PLEASANT WORKING CONDITIONS
2. TO PROVIDE A WORK ENVIRONMENT CONDUCIVE TO MAXIMUM EFFORT AND INCREASED MORALE
THIS IS THE CONCLUSION OF AN EXTENDED AND COMPREHENSIVE NOISE SURVEY USING MUFFLERS FOR NOISE CONTROL. THESE RESULTS SHOW THAT REDUCTION AND CONTROL OF EXCESSIVE NOISE IS FEASIBLE AND EFFECTIVE BY THIS METHOD. A SEPARATE SURVEY ON EACH OF THE FOLLOWING PAGES SHOWS:
1. APPLICATION OF MUFFLER 2. RESULTS OF NOISE SURVEY (BEFORE AND AFTER) 3. CONCLUSION 4. RECOMMENDATION 5. SUGGESTED PURCHASING INFORMATION ALLIED WITAN (ALWITCO) MUFFLERS WERE USED AND THEY PROVED TO BE INEXPENSIVE, EASY TO INSTALL AND EFFECTIVE. MUFFLERS RECOMMENDED ARE CONSIDERED BEST OVER-ALL FOR PERFORMANCE, DURABILITY AND THRUST NECESSARY TO ACCOMPLISH EACH PARTICULAR TASK. ALL SURVEY RESULTS ARE IN DECIBELS (DBA).
L. MOREAU, JR. ^
INDUSTRIAL HYGIENE SPECIALIST RAILROAD/MARINE DEPTS. Irj
-1-
DO
08273A jOFNTtAL
CONF
APPLICATION: CLEANING AND DRYING POLYETHYLENE HOPPER CAR BOTTOM OUTLETS WITH AIR USING 3/4 INCH AIR HOSE WITH MUFFLER AS NOZZLE. DURATION 5 TO 7 MINUTES PER CAR.
RESULTS:
AT HEARING ZONE OF OPERATOR 10 FT. FROM SOURCE 20 FT. FROM SOURCE AIR NOISE ONLY--AT HEARING ZONE
WITHOUT MUFFLER
124 108 104 121
WITH MUFFLER
110 95 88 96
NOISE REDUCTION ACHIEVED WITH MUFFLER: 14 DBA WHEN AIR APPLIED TO CAR 25 DBA AIR NOISE ONLY
CONCLUSION: EXCELLENT REDUCTION OF AIR NOISE. INITIAL LEVELS WERE EXTREMELY HIGH.
RECOMMENDATION: SHOULD BE PURCHASED AND USED. HEARING PROTECTION WOULD STILL BE NECESSARY.
MUFFLER USED: ALWITCO AIR EJECTOR AE TYPE R-88/D WITH ONE INCH MALE
PIPE CONNECTION. PRICE $17.30 EACH.
DO 082735 C0NFTDENTTA1 -2-
^ APPLICATION: DRYING INTERIOR OF TANK CARS WITH AIR USING 3/4 INCH AIR HOSE WITH MUFFLER AS NOZZLE. DURATION - 15 MINUTES PER CAR.
RESULTS:
ON DOME PLATFORM NEXT TO MANWAY INSIDE DOME MANWAY AT TOP OF CAR INTERIOR OF CAR ELEVATED WALKWAY 12 FT . FROM SOURCE
WITHOUT MUFFLER
108 122 126
88
WITH MUFFLER
98 108 112
78
NOISE REDUCTION ACHIEVED WITH MUFFLER: 14 DBA WHEN DRYING INTERIOR OF CAR
CONCLUSION: EXCELLENT REDUCTION OF AIR NOISE. INITIAL LEVELS WERE ' EXTREMELY HIGH.
RECOMMENDATION: SHOULD BE PURCHASED AND USED. HEARING PROTECTION WOULD STILL BE NECESSARY BY ANYONE ON OR INSIDE TANK CAR.
MUFFLER USED: ALWITCO AIR EJECTOR AE TYPE R-88 WITH ONE INCH MALE PIPE CONNECTION. PRICE $17.30 EACH D0 082^36
confidential
-3-
APPLICATION.* STEAMING INTERIOR OF TANK CAR USING TWO MUFFLERS CONNECTED TO A TEE AT END OF ONE INCH STEAM LINE, PROVIDING THRUST OF STEAM TO EACH END OF CAR. DURATION - 15 MINUTES PER CAR.
RESULTS:
WITHOUT MUFFLERS
ON DOME PLATFORM 3 FT. FROM SOURCE
106
ELEVATED WALKWAY 10 FT. FROM SOURCE
95
ELEVATED WALKWAY UNDER ROOF, EAST END
86
ELEVATED WALKWAY UNDER ROOF, WEST END
77
GROUND LEVEL NEXT TO CAR
89
GROUND LEVEL NORTH SIDE OF SHED
83
GROUND LEVEL SOUTH SIDE OF SHED
82
GROUND LEVEL EAST SIDE OF SHED
89
GROUND LEVEL WEST SIDE OF SHED
77
WITH MUFFLERS R-88
100 90 82 75 85 80 79 85 75
CONCLUSION: VERY EFFECTIVE IN REDUCING STEAM NOISE
RECOMMENDATION: SHOULD BE PURCHASED AND INSTALLED. HEARING PROTECTION WOULD NO LONGER BE REQUIRED UNLESS WITHIN 10 FEET OF SOURCE.
MUFFLER USED: ALWITCO AIR EJECTOR AE TYPE R-88 WITH 1 INCH MALE PIPE
CONNECTION. PRICE $17.30 EACH. -4-
DO 082737 CONFIDENTIAL
APPLICATION: AIR DRIVEN 3 INCH SUCTION PUMP MFD. BY WARREN RUPP CO. USED TO PUMP WATER FROM TANK CARS.
RESULTS:
1 FT. FROM SOURCE 5 FT. FROM SOURCE 10 FT. FROM SOURCE 15 FT. FROM SOURCE 20 FT. FROM SOURCE 25 FT. FROM SOURCE
WITHOUT . MUFFLER
' 100 94 91 89 87 85
WITH MUFFLER X-10
85 79 77 75 74 73
CONCLUSION: EXCELLENT REDUCTION OF AIR NOISE, BELOW OSHA STANDARD
RECOMMENDATION: SHOULD BE PURCHASED AND INSTALLED. HEARING PROTECTION WOULD NO LONGER BE NECESSARY.
MUFFLER USED: ALWITCO AIR EXHAUST EP TYPE X-10 WITH 1 INCH MALE PIPE CONNECTION. PRICE $10.75 EACH.
DO 08P738 CONFIDENTIAL. -5-
APPLICATION: AIR DRIVEN 2 INCH SUCTION PUMP, MFD. BY PRESSED AND WELDED PRODUCTS. USED TO PUMP WATER FROM TANK CARS
RESULTS
1 FT. FROM SOURCE 5 FT. FROM SOURCE 10 FT. FROM SOURCE 15 FT. FROM SOURCE 20 FT. FROM SOURCE 25 FT. FROM SOURCE
WITHOUT MUFFLER
102 93 90 88 87 85
WITH MUFFLER X-10
81 78 76 75 74 72
CONCLUSION: EXCELLENT REDUCTION OF AIR NOISE, BELOW OSHA STANDARD
RECOMMENDATION: SHOULD BE PURCHASED AND INSTALLED. HEARING PROTECTION WOULD NO LONGER BE NECESSARY.
MUFFLER USED: ALWITCO AIR EXHAUST EP TYPE X-10 WITH 1 INCH MALE PIPE CONNECTION. PRICE $10.75 EACH.
00 082739 CONFIDENTIAL -6-
APPLICATION: AIR DRYER AIR RELEASE. RELEASE CYCLE - ON A MINUTES, OFF 1 MINUTE.
RESULTS: 1 FT. FROM SOURCE 3 FT. FROM SOURCE
WITHOUT MUFFLER
. 116 112
WITH MUFFLER X-10
110 103
WITH MUFFLERS X-10 & T-10 CONNECTED
96 9A
CONCLUSION: EXCELLENT REDUCTION OF AIR RELEASE NOISE WHEN MUFFLERS X-10 and T-10 ARE CONNECTED TOGETHER.
RECOMMENDATION: SHOULD BE PURCHASED AND USED. THIS NOISE SOURCE IS WITHIN A CONCRETE BLOCK WALL ENCLOSURE WITH OTHER NOISY EQUIPMENT. HEARING PROTECTION IS ALREADY REQUIRED AND SHOULD CONTINUE TO BE REQUIRED.
MUFFLERS USED: ALWITCO AIR EXHAUST EP TYPE X-10 WITH ONE INCH MALE PIPE CONNECTION. PRICE $10.75 EACH. ALWITCO TF TYPE T-10 THRU-FLOW MUFFLER WITH ONE INCH MALE PIPE CONNECTIONS. PRICE $13.20.
DO 082740 CONFIDENTIAL -7-
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DO 082742 CONFIDENTIAL
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APPLICATION: DRYING INTERIOR OF TANK CARS WITH AIR USING 3/4 INCH AIR HOSE WITH MUFFLER AS NOZZLE. DURATION - 5 MINUTES PER CAR.
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RESULTS:
ON DOME PLATFORM NEXT TO MANWAY -INSIDE DOME MANWAY AT TOP OF CAR -INTERIOR OF CAR
ELEVATED WALKWAY 12 FT. FROM SOURCE
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MUFFLER
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DO 082745 CONFIDENTIAL
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APPLICATION:
CLEANING AND DRYING POLYETHYLENE HOPPER CAR BOTTOM OUTLETS
WITH AIR USING 3/A INCH AIR HOSE WITH MUFFLER AS NOZZLE.
DURATION A TO 5 MINUTES I
CAR.
RESULTS:
AT HEARING ZONE OF OPERATOR 10 FT. FROM SOURCE 20 FT. FROM SOURCE AIR NOISE ONLY--AT HEARING ZONE
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