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目的明确某原油长输管道工程投产运行后产生的职业危害因素,并对该项目进行效果评价。方法 2013年采用职业卫生现场调查、职业危害因素检测和检查表法等进行综合分析和评价。结果该项目在正常运行过程中存在的主要职业危害因素有低碳烃类化合物、一氧化碳、一氧化氮、二氧化氮、硫化氢、氨、溶剂汽油、苯、甲苯、二甲苯、噪声和工频电场等。维修过程中存在的职业危害因素有电焊烟尘、砂轮磨尘、锰及其化合物、一氧化碳、一氧化氮、二氧化氮、臭氧、噪声、紫外辐射等。检测:维检修过程中电焊操作位锰及其化合物短时间接触浓度和时间加权平均浓度超标;噪声40 h等效声级为64.0~87.9 d B(A)。维抢修队维修车间电焊烟尘为4.9 mg/m3,工频电场为8.31~1 401 V/m,均符合国家职业接触限值的要求。砂轮磨尘为16.3 mg/m3,超标。结论该工程职业危害控制效果基本符合要求,但要加强维检修作业员工的个体防护。
Aim To clarify the occupational hazards that occur after a long-distance crude oil pipeline project is put into operation, and evaluate the effect of the project. Methods In 2013, occupational health field survey, occupational hazards factor test and checklist method were used for comprehensive analysis and evaluation. Results The main occupational hazards that exist in the normal operation of the project are low carbon hydrocarbons, carbon monoxide, nitric oxide, nitrogen dioxide, hydrogen sulfide, ammonia, solvent gasoline, benzene, toluene, xylene, noise and power frequency Electric field and so on. Occupational hazards in the repair process are welding fumes, grinding wheel dust, manganese and its compounds, carbon monoxide, nitric oxide, nitrogen dioxide, ozone, noise, ultraviolet radiation and so on. Testing: The short-term contact concentration and time-weighted average concentrations of manganese and its compounds in the welding process during maintenance are beyond the standard; the 40-h equivalent sound level is 64.0-87.9 d B (A). The maintenance team repairs workshop welding fume is 4.9 mg / m3 and the power frequency electric field is 8.31-1 401 V / m, all meeting the national occupational exposure limits. Grinding wheel dust is 16.3 mg / m3, exceeding the standard. Conclusion The control effect of occupational hazards in this project basically meets the requirements, but it is necessary to strengthen the individual protection of maintenance staff.