PRODUCTS

ALKALI BAND & ACID BAND

Coloration cloth band for safety of piping

  • Alkali Band

  • Acid Band

Where hazardous liquids or gases such as acids or alkalis flow in piping, small leaks occur initially.
But if overlooked, they erupt in large quantities and cause big accidents.
Early detection is critical point for prevention of leakage accident.

Alkali band turns from light green to blue, purple, black, etc. when exposed to alkaline liquids and gases and others.

liquid or gas density pH reaction time note
ammonia gas     few minutes~an hour react in over 38% humidity
agueous ammonia 1~28% 10~14 immediate  
ammonium hydrogen carbonate 3% 8 few minutes  
10% 8 immediate  
sodium hydroxide 1~40% 13.4~ immediate over40~48%
cloth melt down
ethylenediamine 10% 12 immediate  
diethylene triamine 10% 12 immediate  
sodium hypochlorite 6% 13 some seconds  
hydrogen peroxide water 3% 5 few minutes  
30% 5 immediate  
hydrogen sulfide gas - - immediate~few minutes  
sodium carbonate 25% 11.5 no color change  
sodium hydrogen carbonate 10% 10 no color change  
sodium nitrite 40% 9.2 no color change  
ammonium sulfate 10% 6.1 no color change  
aniline 10% 9 no color change  
diethylamine 10% 13 no color change  
Dimension
25 mm x 10 m
Component
Polyester fiber, Inorganic pigment

Acid Band turns from reddish brown to white or yellow when exposed to acidic liquids or gases.

liquid or gas density pH reaction time note
hydrochloric acid 35% - some seconds  
10% - under one minute  
1% 1.2 an hour  
sulfuric acid  48% - some seconds over95%
cloth melt down
10% - few minutes
1% 1.2 an hour
nitric acid 10% - 30 minutes over60%
cloth melt down
1% 1.2 few hours
perchloric acid 60% - 45minutes  
hexafluorosilicic acid 40% - some seconds  
1% 2.0 30 minutes  
oxalic acid 10% 1.1 few minutes  
1% 1.5 an hour  
phosphoric acid 10% 1.2 10 minutes  
1% 1.7 24 houes  
citric acid 10% 1.8 12 hours  
acetic acid 10% 2.1 24 hours  
sulfurous acid gas - - immediate  
chromic anhydride 25% 1.6 no color change  
  • Before color change

  • After color change

They can be attached easily and firmly.
You can wrap them around even oily and soiled area without any tools as follows:
1, Wrap around at least one time.
2, Cut in needed length with fingers
3, Press the cut edge on wrapping band itself

  • 1

    Wrap around at least one time.

  • 2

    Tear off with fingers.

  • 3

    Press the end of band to itself.

If only critical (tend-to-leak) areas are addressed, many accidents can be prevented at low cost.
Most leaks occur from flanges and valves due to packing fatigue or uneven bolting.

If Acid Band or Alkali Band are pre-wrapped around critical areas, they absorb leaked liquid and gas and change colors to detect the accidents.
So to speak, they are similar to inorganic Litmus test paper.

  • In case of non-use
  • In case of use

On the other hand, they can be removed if you peel off the cut edge upward and can be reused.

They can be used outdoors because they are resistant to ultraviolet rays and do not discolor when wet.

They adsorb liquid and prevent splattering and dripping.
Even if a leak occurs from the opposite side of observation position, it can be easily detected because whole band changes its color by capillary phenomenon.

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