vacuuming. The coating manufacturer should be contacted for special
priming and caulkingm ethods.
4.3L iningFunction
The primary function of ac oating system is to protect the substrate.
An equallyimportantconsideration is product purityprotection. The purity
of the liquidm ustn ot be contaminated with byproducts of corrosion
or leachate from the linings ystem itself. Selection of al ining material for
as tationarys torage tank dedicatedt oh olding one product at more or less
constantd urations and temperatures is relatively easy because sucht anks
present predictable conditions for coating selection. Conversely,t anks that
see intermittent storage of avariety of chemicals or solvents, such as product
carriers,p resent am ore difficult problem becauset he parameters of
operation vary.C onsiderationm ustb eg iven to the effect of cumulative
cargoes. In addition,abrasion resistance must be considered if the product in
the tank is changed regularly.W ith complete cleaning between loads, the
coating will be abraded.
4.4L iningSelection
To properly specify alining material, it is necessary to know specifically what
is beinghandled andunderwhat conditions. The following information must
be known about the material beinghandled:
1. What aret he primaryc hemicals to be handled and at what
concentrations?
2. Are there any secondary chemicals, and if so at what concentrations?
3. Are there any trace impurities or chemicals?
4. Are there any solids present, and if so what are the particle sizes and
concentrations?
5. Will there be any agitation?
6. What are the fluid purity requirements?
7. What will be present in the vapor phase above the liquid?
The answers to these questionsw illn arrow the selection to those coatings
that are compatible. Table 4.2 provides al ist of typical lining materials and
their general area of application. However,t he answers to the next set
of questionsw illn arrow the selection down to those materials that are
Liquid-Applied Linings
75
CAT8247—CHAPTER 4—17/10/2006—14:33—SRIDHAR—XML MODEL B–pp. 69–174
priming and caulkingm ethods.
4.3L iningFunction
The primary function of ac oating system is to protect the substrate.
An equallyimportantconsideration is product purityprotection. The purity
of the liquidm ustn ot be contaminated with byproducts of corrosion
or leachate from the linings ystem itself. Selection of al ining material for
as tationarys torage tank dedicatedt oh olding one product at more or less
constantd urations and temperatures is relatively easy because sucht anks
present predictable conditions for coating selection. Conversely,t anks that
see intermittent storage of avariety of chemicals or solvents, such as product
carriers,p resent am ore difficult problem becauset he parameters of
operation vary.C onsiderationm ustb eg iven to the effect of cumulative
cargoes. In addition,abrasion resistance must be considered if the product in
the tank is changed regularly.W ith complete cleaning between loads, the
coating will be abraded.
4.4L iningSelection
To properly specify alining material, it is necessary to know specifically what
is beinghandled andunderwhat conditions. The following information must
be known about the material beinghandled:
1. What aret he primaryc hemicals to be handled and at what
concentrations?
2. Are there any secondary chemicals, and if so at what concentrations?
3. Are there any trace impurities or chemicals?
4. Are there any solids present, and if so what are the particle sizes and
concentrations?
5. Will there be any agitation?
6. What are the fluid purity requirements?
7. What will be present in the vapor phase above the liquid?
The answers to these questionsw illn arrow the selection to those coatings
that are compatible. Table 4.2 provides al ist of typical lining materials and
their general area of application. However,t he answers to the next set
of questionsw illn arrow the selection down to those materials that are
Liquid-Applied Linings
75
CAT8247—CHAPTER 4—17/10/2006—14:33—SRIDHAR—XML MODEL B–pp. 69–174