The basic outside structure of series glass tube liquid level meter
 
The mark example with standard HG21592-95

Example: 1 nominal pressure: 1.6 Mpa, stainless steel material, temperature preserved, flange connection, nominal length: 500mm, the mark is WAIIL=500mm
　　 3.  Basic parameter
　　 3.1  Work pressure：1.6Mpa，
工作温度 Work temperature 0-200℃
　　 3.2 pressure of pin valve close ≥0.2（Mpa)
　　 3.3
The parameter of nominal length of the connecting flange is as the table below:
 Liquid level standard No.
 Structure characteristics
 Flange No.
Structure
 Main frame material
HG21592-95 D
 Standard I (carbon steel)
II（stainless steel ）     A.Pg16    Dg20
HG5010-58
B.Pg16    Dg20
HG5012-58
W
 Temperature-preserved I (carbon steel)
II（stainless steel）