1.0.1 This standard specifies the standard types of the series of translucent, reflective and sight glass glass plate level gauges, the maximum allowable operating pressure at various levels of temperature, technical requirements and labeling methods. 1.0.2 This standard is applicable to normal pressure vessels with nominal pressures of 0.0 to 0.1MPa and pressure vessels of 0.6, 2.5, 4.0, and 6.3MPa in the chemical industry. Glass plate liquid levels used for equipment liquid level indication are used at temperatures of 0 to 250°C. meter, its series standards are shown in Table 1.0.2.
HG 21588-1995 history
1996HG 21588-1995 Standard series and technical requirements of glass plate liquid level gauge