Hazardous Area Classification - YOKOGAWA ADMAG AXR User Manual

Grounding Ring/Grounding Electrode;
• Grounding Ring (plate type)
Stainless steel-JIS SUS316 (AISI 316 SS/EN
1.4401 equivalent), Stainless steel-JIS SUS316L
or ASTM 316L (AISI 316L SS/EN 1.4404 equiva-
lent), HASTELLOY C-276
• Grounding Electrode (electrode type)
Fluorocarbon PFA lining + grounding electrode
(Tantalum, Platinum-Iridium)
*1: Hastelloy is a registered trademark of Haynes Interna-
tional Inc.
*2: The permeable fluids (such as nitric acid, hydrofluoric
acid, or sodium hydroxide at high temperature) are
unusable.
Gasket;
Use General-purpose Use/
Explosion Proof Type
Grounding ring
Standard
Grounding ring
Optional
code
(GA, GC,
or GD)
Gasket Material (within Flowtube)
GA: Fluororubber for PVC pipes (Viton®)
GC: Acid-resistant fluororubber for PVC
pipes (Viton®)
GD: Alkali-resistant fluororubber for PVC
pipes (Viton®)
Use General-purpose Use/
Explosion Proof Type
Grounding ring
Optional
code
(BSF or
Flange of user's pipe
BSC)
Gasket Material (for user's flange)
BSF: PTFE-sheathed non-asbestos
BSC: Chloroprene rubber
Recommended Gaskets Between Flowtubes And
User's Flanges:
Gaskets Type
Use compressed non-asbestos fiber gaskets,
PTFE-sheathed non-asbestos gaskets or gaskets
which have equivalent elasticity.
For optional codes GA, GC, and GD, use rubber gas-
kets or others which have equivalent elasticity.
equivalent
*1
*2
No gasket within Flowtube
Gasket within Flowtube
Gasket for
user's flange
<12. OUTLINE>
Gaskets Size
Be sure to choose a gasket with an inner and outer
diameter that does not protrude inside the piping
(Read Subsection 3.3.4).
If the inner diameter of the gasket is too large, or out-
er diameter of the gasket is too small, fluid leakage
may result.
Electrode Construction:
Internal insertion type
12.2 HAZARDOUS AREA
CLASSIFICATION
Read Chapter 14.
12-5
IM 01E30D01-01EN