General Infomation G-0005
Procedure of Tightening of Bolts and Nuts for Flanges for Reassembling [1] /[2]
The following is the procedure for tightening bolts and nuts for flanges for flowmeters and level meters.
1. Applicable types and positions
Flowmeters
Direct Indicating, metal tube type variable area flowmeter |
A-10□, A-75□ |
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Metal tube type variable area flowmeter | M-20□, M-40□, M-31□, M-52□, M-69□, M-74□ |
Metal tube type variable area flowmeter | AM-140□, AM-131□, AM-152□, AM-169□, AM-174□ |
Tightening of upper flanges | Assembling of reducers |
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Level meters
Float type level switch | FR-6000 | |
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Displacer type level switch | FS-100 |
2. Applicable material
Assembling of level switch and external chamber |
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Flange | Carbon steel and/or Stainless steel | |
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Bolts and nuts | SS400, SUS304, SNB7/S45C |