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Codes and Standards:


Our engineering and production staff has the training and expertise to design and manufacture products in accordance with international codes and standards:

  • ASME Section VIII Div. 1, Div. 2,

  • ASME Piping standards Like ASME ANSI B16.5, ANSI 31.3 etc.

  • WRC Bulletins

  • API 661 / ISO 13706

  • API 660 / ISO 16812

  • ACSE Code

  • AWS

  • ASTM

  • Canadian CRN Requirements

  • DIN Standard AD-MECKBLATT

  • Japanese Pressure Vessel Code (JPVC)

  • TEMA
    R, C, B

  • CE Marking as per PED 97/23/EC

  • Indian Standard IS 2825, IS-875, IS1893

  • IBR

  • NB

Design and Proposals Submission


Our dedicated staff of mechanical and chemical engineers design and submit our proposals using

  • Rating (Known duty & Geometry)

  • Simulation (Unknown duty & known Geometry)

  • Design (Known duty & unknown geometry)

program of HTRI with a good understanding of the underlying principles of exchanger design. Software is well equipped with the VMGThermo™, an extensive and rigorous fluid physical property generator readily available being a members of HTRI.


Mechanical design of heat exchangers (TEMA) type + Air cooled) and pressure vessels is carried out using Auto Pipe Vessel software which is a Bentley product. We can work through all project phases for a successful implementation of your requirement of heat exchanger & pressure vessels.

 


ESSENTIAL REQUIREMENT DURING DESIGN OF HEAT EXCHANGER

AIR COOLED HEAT EXCHANGER

  •  Good understanding of the underlying principles of exchanger to design on HTRI & Bentely Autopipe-Microprotal.

  •  Diagnosis for Feasibility & Viability design

  •  Decision for actual ambient temperature

  •  Ensure effect of changing climatic conditions

  •  Distinguish & select type of finned tube like High-finned, low-finned, continuous-finned, stud-finned or plain tubes…….

  •  Analysis for Heat Transfer capacity of Fin tube for cost effective heat exchanger.

  •  Checking requirements of twisted tapes to increase efficiency of heat exchanger

  •  Consideration to Heat Transfer Rate, Space requirements & Air side pressure drop.

  •  Selection of operation of fan viz. forced draft or induced draft

  •  Calculations with respect to No fan position.

  •  Fan Blade Material selection such as Aluminium & Fibre Reinforced Plastic etc.

  •  Air Flow rate & Noise level

  •  Optimise power requirement

ASPECTS OF MECHANICAL DESIGN OF AIR COOLED HEAT EXCHANGER

Tubeside Design

  •  Tube Bundle Design for stability & thermal expansions

  •  Tube Sheet design considering effects of the drilled holes

  •  Heating Coil requirements based on the fluid being handled

  •  Header Design (Removable Bonnet Header, Plug Header)

  •  Nozzle Loads

Air Side Design

  •  Selection of Fan, Fan Guard, Hub looking into application & noise level requirements.

  •  Selection of Electric Motor drivers-Variable drives, Belt drives, Reduction Gear-box, Variable speed drives

  •  Structural Design based on international standards

  •  Plenums chamber Layout & Design

  •  Methods of Winterization for Air flow and Air temperature control Systems

  •  Louvers & its mechanism

  •  Walkways & Platforms

Governing factors in the design of the air cooler are:

  •  Tube diameter

  •  Tube length

  •  Fin height

  •  Number of tube rows

  •  Number of passes

  •  Face area

  •  Power availability

  •  Plot area

Since there are many variables, normally there many solutions, however the designer attempts to find the optimum economic design given these factors.

SHELL & TUBE HEAT EXCHANGER

  • Good understanding of the underlying principles of exchanger to design on HTRI & Bentely Autopipe.

  • Diagnosis for Feasibility & Viability design

  • Classification of S&T HE according to construction and criticality of service.

  • Allocation of shell side and tube side fluids in S&T HE

  • Decision on Baffle arrangement for tube side and shell side heat transfer and pressure drop

  • Optimum Tube Lay out taking care of code requirements

  • Selection of type of heat exchanger based on service which may be single phase (such as the cooling or heating of a liquid or gas) or two-phase (such as condensing or vaporizing).

  • Corrosion prevention measures

  • Fouling considerations.

  • Optimum design to evaluate the impact of utility and footprint constraints on the heat exchanger design

  • Develop specification sheets for heat exchangers

  • Terminal temperatures of fluids

ASPECTS OF MECHANICAL DESIGN OF AIR COOLED HEAT EXCHANGER


The principal components of Shell & Tube HX are:

  •  Shell

  •  Shell cover

  •  Channel

  •  Channel cover

  •  Tubes

  •  Tube sheet

  •  Baffles

  •  Nozzles

Other components include tie-rods and spacers; pass partition plates, impingement plate, longitudinal baffle, sealing strips, supports. The Tubular Exchanger Manufacturers Association (TEMA ) standard describes these various components in detail.


PRESSURE VESSELS

  • Sizing of pressure vessels like volume of Receivers, space for moisture separations

  • Due consideration of Corrosion may be due to environment

  • Selection of material taking care of economical design

  • External Loadings.

  • Nozzle openings requirements

  • Good understanding with Mechanical Design Software

  • Basic Purpose of vessel

ASPECTS OF MECHANICAL DESIGN OF PRESSURE VESSELS

  • Fluid characteristics

  • Temperatures & pressures

  • Code requirement

  • Corrosion protections

  • Any drain requirements

  • Safety Requirements likes Pressure Relieving valve

  • Mountings

  • External loadings like snow, wind, seismic, piping etc.

  • Internal Loadings due to internal Supports.

  • Impact test requirements

  • Cyclic loading requirements

  • Necessity DE ‘pulse analysis for vibrations

  • Shock analysis for impact load

  • Design optimizations for External pressure by stiffening the shell

PROCESS FLOW SKIDS

  •  Thorough knowledge of Systems

  •  Basic Purpose of skid

  •  Space requirements

  •  Selection of Instrumentation

  •  Controls required for processes,

  •  Piping routine, its optimisation

  •  Ergonomic study looking into operations requirements

  •  Hazop analysis

  •  Optimisation of power requirements if any for rotating parts

  •  Piping stress analysis

  •  Support selection for piping.

ASPECTS OF DESIGN OF PROCESS FLOW SKIDS

  •  Type of equipment

  •  Area classification

  •  External Loadings like wind & seismic

  •  Vibration limits for rotating equipment

  •  Stress limitations

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