Standard for oil content of compressed air in air separation unit

The oil content standard of compressed air in air separation units usually varies according to different industries and application fields. The following is a clear summary of the oil content standards for compressed air of the air separation unit based on the information provided in the reference article:

ISO 8573 standard:

the ISO 8573-1 standard defines the maximum allowable content of oil in compressed air. Among them, the oil is divided into several grades:

CLASS 0 (oil-free grade): oil content less than 0.01 mg/m & sup3;.

CLASS 1: The oil content does not exceed 0.01 mg/m & sup3;(same as CLASS 0, but may indicate the limit of different detection methods).

CLASS 2: Oil content not exceeding 0.1 mg/m & sup3;.

CLASS 3: Oil content not exceeding 1 mg/m & sup3;.

ASTM D6786-02 Standards:

this is a method for determining the oil content of compressed air by gas chromatography. It is mainly suitable for determining the content of liquid and gaseous hydrocarbon oil in compressed air, and expresses the oil content in mg/m3 or other appropriate units.

GMP standards for the pharmaceutical industry:

the pharmaceutical industry has very strict requirements for the oil content of compressed air, and usually requires that the oil content of compressed air should not exceed 0.1 mg/m & sup3; to ensure the quality and safety of drug production.

Quality grade of compressed air for industrial use (GB/T13277-91):

in China, the quality level of industrial compressed air also has corresponding national standards. For oil content, the higher the grade, the lower the oil content requirement. For example, the oil content requirement in compressed air is 0.01 mg/m & sup3; for class 1, 0.1 mg/m & sup3; for class 2 and 1.0 mg/m & sup3; for class 3;.

General requirements for air separation systems:

the air separation unit is usually designed according to the oil content of the air near the plant site area, which varies from region to region. Generally, the oil content of air separation may be ≤ 3 mg/m & sup3;, but the specific value may be different due to different equipment and process requirements.

Detection method:

the detection methods of oil content in compressed air include gas chromatography, fluorescence and ultraviolet method. The choice of the specific method depends on the requirements for detection accuracy and cost.

In summary, the oil content standards for compressed air in air separation units vary depending on the industry, application area and specific process requirements. When formulating and implementing relevant standards, it is necessary to comprehensively consider factors such as equipment performance, product quality, safety requirements and economic costs.