A Presentation on

Multilayer Pressure vessels

What is Multilayer ? Fabricated By consecutively shrink

Fitting multiple cylindrical shells over each other

Thickness of Individual shell =15~100 mm

Comply With ASME Sec VIII Div.1 or Div.2

Application of multiwall Pressure vessels

Fertilizer Industry(Ammonia convertor etc.)

Petrochemical Industry (Solution Adsorber etc.)

Petro refineries( Hydrocrackers etc.) Chemical Industry (HP Heat

Exchangers etc.)

Need For multiwall construction

New Development In Process Technology required Equipment to Operate at higher Pressure & temperature

Equipment Required To handle lethal Fluids containing Hydrogen, Ammonia etc.

Exponential Increase in Plant capacities

Cost Effective

Material for multiwall vessel

Carbon & low alloy steel Higher Strength quench & temped

material Solid alloy liner Backed by multiwall

shell

Advantages Material of different properties can be

used for inner layer & subsequent layers Thinner plates permit better

metallurgical control & superior structural homogeniety during manufacturing at mills.

Shrink fitting of multiwall induces compression in inner layers, which counters the pressure stress and thus creating additional reserve strength

Proposed Research work Calculation for Shrinkage Pressure Using

Mathematica & FEA. Optimization of shrinkage margin in Shell

Plates. FEA of Different Materials for multilayer

vessels. Thickness calculation & comparison B/w

ASME Sec VIII Div.1 & Div.2. Optimization for thickness of Each layer. Weld Strength calculation using FEA. Support Analysis for the Multi layer Vessel.

Industries In this Field In India L&T , Godrej and ISGEC

Hitachi Zosen Ltd. In International market only HITACHI,

Kellong Brown & Root, Toyo.

Thanks