HG/T 4285-2011 (English Version) PDF

Scope: This standard specifies the marking, materials, requirements, inspection methods, inspection rules, marking, packaging, transportation and storage of round soda-lime glass sight glasses for pressure vessels. This standard applies to sight glasses made by physical reinforcement and tempering processes and used for observation holes in pressure vessels (or pipelines). The medium is a continuously flowing fluid with a temperature resistance of 150°C, but is not limited to use below ambient temperatures. For alkaline solutions, the maximum operating temperature does not exceed 100°C.

HG/T 4285-2011 Referenced Document

GB/T 16920 Determination of average linear thermal expansion coefficient of glass*， 2016-07-01 Update
GB/T 5137.2 Test methods of safety glazing materials used on road vehicles—Part 2:Optical properties tests*， 2020-03-31 Update
GB/T 6579-2007 Laborator glassware.Thermal shock and thermal shock endurance test methods
GB/T 6580 Glass—Resistance to attack by a boiling aqueous solution of mixed alkali—Method of test and classification*， 2021-08-20 Update
GB/T 6581 Glass resistance to attack by hydrochloric acid at 100℃ flame emission methid or flame atomic absorption spectrometric method
GB/T 6582 Glass—Hydrolytic resisitance of glass grains at 98℃—Method of test and classification*， 2021-08-20 Update