HG/T 2129.9-1991 Acid-resistant phenolic plastics sight glasses for chemical equipment parts HG/T2129.9-1991 Standard download decompression password: www.bzxz.net

Scope of application
Chemical Industry Standard of the People's Republic of China
Acid-resistant phenolic plastic sight glasses for chemical equipment parts
HG/T 2129.9-91
This standard applies to sight glasses made of acid-resistant phenolic plastic with an allowable temperature of -30℃ to 130℃ and an allowable pressure as specified in the table below2 Reference Standards
HG/T2128 Technical conditions for chemical equipment, pipes and pipe fittings made of acid-resistant phenolic plastic SI6 Technical conditions for manufacturing and acceptance of liquid level gauges, sight glass plates and pipes for chemical and petroleum equipment 3 Type. Basic dimensions
Type and basic dimensions are as specified in the figure below and Tables 1 and 2. NNEN
Approved by the Ministry of Chemical Industry of the People's Republic of China on August 19, 1991 and implemented on January 1, 1992
Nominal true diameter
Sight glass
Matching ring
Looping ring
Sight glass sharp grid
95×15
165×20
HG/T 2129.991
Parts list
See basic dimension table
See basic dimension table
212255
Basic dimension table
Silicon glass
HT 150Www.bzxZ.net
Nervous plastic
160:220
The height of the sight glass can be changed as needed. After the change, it shall be indicated on the equipment drawing and the quality of the equipment shall be improved. Note:
Quality inspection, packaging, storage and transportation of raw materials and finished products 4
HG/T2129.29
HG/T 2129.29
Allowable positive force at room temperature
MPaikgf/cm
0. 40 (4)
Quality inspection, packaging, storage and transportation of raw materials and finished products shall comply with the provisions of HG/T2128. The pressure test of the gauge mirror shall be carried out together with the equipment. The appropriate size and relevant technical requirements of the sight glass shall comply with the provisions of SJ6. 3 The technical requirements of the gland, split ring and loose ring shall comply with the relevant provisions of HG/T2129.29.
6 Marking example
The marking symbol for the sight glass with nominal diameter DN=80mm is: Standard mirror DN 80 HG/T 2129.9--91
The marking symbol for the sight glass with nominal diameter DN=80mm, H, yuan 170mm (non-standard size) is: Sight glass DN80×170HG/T2129.9—91
Additional instructions:
This standard is proposed by China National Chemical Equipment Corporation and is under the jurisdiction of the National Technical Committee for Standardization of Non-metallic Chemical Equipment. This standard is drafted by Chengdu Chemical Research and Design Institute, and the main contributors to this standard are He Jiabing. He Jin. 20
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