Non-High pressure vessel which made by us are all designed according to satisfy and safety the most, semi-elliptical shape was introduced by us for lower center of gravity and larger volume. Therefore, Material strength is the key point of semi-elliptical straight sectional barrel to achieve aims of us.
From engineering class, we are well-known of sphere is the best shaped in the world which can be hold high pressure inside it, Football for instance. After Sutee tankers introduced The round shape sectional barrel in Thailand, with low center gravity. From this reason it was widely use with high pressure-vessel road tanker (LPG) and chemical tank tehn round shaped is very common structure shape that you can see often in road.