6
Sheet Linings
Designers of tanks and process vessels are faced with the problem of
choosing the most reliable material of construction at ar easonable cost.
When handling corrosive materials, ac hoice musto ften be made between
usinga ne xpensive metallic material of construction or usingal ow-cost
material from whicht of abricate the shell and then installing ac orrosionresistant lining. Carbon steel has been and still is the material predominantly
selected;although, there has been atendencyover the past few years to use
afi berglass-reinforcedp lastic shell. This latter choice has the advantage of
providing atmospheric corrosionprotection of the shell exterior.
For manyyears, vesselshave been successfully lined with variousrubber
formulations, both natural and synthetic. Many such vessels have given over
twenty yearso freliable service.
With the developmento fn ewer synthetice lastomeric andp lastic
materials, the variety of available lining materials has greatly increased.
As with any material, the corrosionresistance, allowable operating values,
and cost varies with each. Care must be takenw hens electingt he lining
material that it is compatible with the corrodent beingh andled at the
operating temperatures and pressures required.
6.1A Shell Design
For al ining to perform satisfactorily,t he vessel shell must meet certain
design configurations. Although these details may vary slightly depending
on the specificl ining material to be used, there are certain basic principles
that apply in all cases:
1. Vessel must be of butt-welded construction.
2. All internal welds must be ground flush.
3. All welds patter must be removed.
CAT8247—CHAPTER 6—6/10/2006—12:28—SRIDHAR—XML MODEL B–pp. 287–402
287
Sheet Linings
Designers of tanks and process vessels are faced with the problem of
choosing the most reliable material of construction at ar easonable cost.
When handling corrosive materials, ac hoice musto ften be made between
usinga ne xpensive metallic material of construction or usingal ow-cost
material from whicht of abricate the shell and then installing ac orrosionresistant lining. Carbon steel has been and still is the material predominantly
selected;although, there has been atendencyover the past few years to use
afi berglass-reinforcedp lastic shell. This latter choice has the advantage of
providing atmospheric corrosionprotection of the shell exterior.
For manyyears, vesselshave been successfully lined with variousrubber
formulations, both natural and synthetic. Many such vessels have given over
twenty yearso freliable service.
With the developmento fn ewer synthetice lastomeric andp lastic
materials, the variety of available lining materials has greatly increased.
As with any material, the corrosionresistance, allowable operating values,
and cost varies with each. Care must be takenw hens electingt he lining
material that it is compatible with the corrodent beingh andled at the
operating temperatures and pressures required.
6.1A Shell Design
For al ining to perform satisfactorily,t he vessel shell must meet certain
design configurations. Although these details may vary slightly depending
on the specificl ining material to be used, there are certain basic principles
that apply in all cases:
1. Vessel must be of butt-welded construction.
2. All internal welds must be ground flush.
3. All welds patter must be removed.
CAT8247—CHAPTER 6—6/10/2006—12:28—SRIDHAR—XML MODEL B–pp. 287–402
287