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Heat Exchangers

The heat exchangers offered by Nigasu are designed by expert technicians in accordance to the industry standards. Constructed using fine quality raw material such as carbon steel, stainless steel, brass, and copper, these heat exchangers are also manufactured in diverse range of capacity.

Nigasu's heat exchangers are specially designed for the smooth and efficient transfer of heat from one fluid to another fluid over solid surface. These products find wide application in Chemical, Fertilizer, Petrochemical, Pharmaceutical, Food and Dairy, Cement, Pulp and Paper industries, etc.

Repair Services

With the help of well established unit and experienced team, Nigasu offers world-class Heat
Exchanger Repair Services in compliance with industry standards. The company has the expertise to perform repair services as per the input parameters. It gives complete attention to each and every specific detail while undertaking repair works for clients. The repairing is carried out at fast speed without compromising on standard of material use and overall quality. The output is dimensionally precise and reliable heat exchangers.

Nigasu has successfully carried out numerous heat exchanger repair services in diverse industry like Chemical, Fertilizer, Cement, Petrochemical, Pharmaceutical, Marine, Food and Dairy, Pulp and Paper, etc.

Air Aftercoolers

Nigasu fabricates high quality air aftercoolers in accordance to international design standards. These coolers are available in standard as well as in various capacities as per clients' requirements. These coolers are built in numerous construction materials which are essential to overcome the extreme conditions at site. Available in standard specification, the range of Air Aftercoolers can also be customised as per the requirements of clients.

Developed using quality raw material, Nigasu's range of Air Aftercoolers finds application in various sectors in the industry such as power plants, marine, aerospace, petrochemical & refineries, textiles, etc.

Company Profile

Nigasu Engineering Works is renowned in the industry for Heat exchanger re-tubing, Tube Expansion, Tube to tube sheet welding, In-situ heat exchanger tube machining, etc.
Supported by strong in-house manufacturing and an experienced technical team, Nigasu designs and develops finest products for clients. Through relentless pursuit for perfection and unmatched performance, the company has garnered a large clientele from numerous sectors. By providing advanced and innovative products, the company aims to meet the specific requirements of customers and thereby increase their productivity and profitability.
The company is also a reputed service provider for its Heat Exchangers, Pressure Vessels, Air Aftercoolers, and Heat Exchanger Repair Services. Products (all manufacturing is done under the name NIGASU ENGINEERING COMPANY).

Process Equipment:
  • Heat Exchangers
  • Pressure Vessels
  • Air Aftercoolers
  • Heat Exchanger Repair Services
Heat Exchanger tooling:
  • Tube Expanders
  • Grooving tools
  • Tube end facing tools
  • Tube pullers
  • In-situ machining tools


Nigasu embarks in the manufacturing field with technically qualified and experienced staff. Its production setup has world-class technocrats and advanced machineries which are the reasons behind the company's success over the years. The company has qualified and experienced professionals who undertake innovative and demanding tasks using latest techniques in compliance with international standards. The company's technical team provides assistance to customers for selecting the right products based on the economic aspect and technical requirements.

Products are renowned for the following reasons:
  • High grade raw material used
  • Dimensional accuracy
  • Easy installation
  • Low maintenance
  • Trouble-free operation
  • Reliable in extreme conditions

Quality Assurance

At Nigasu Engineering, quality is of paramount importance. The high standards of quality check results in strict control of quality starting from raw material, design to product development. The products offer high degree of reliability and performance even under extreme conditions. Nigasu's mission is to enlarge its market presence and cater to the needs of varied industrial sectors with high quality products and solutions. Their quality policies aims at providing maximum satisfaction to customers, constant quality improvement, and relentlessly meet quality objectives, etc.

History and lineage

The name NIGASU goes back to the swinging sixties when N.B. Mukerjee, an aircraft engineer with ordinary resourcesbut extraordinary enthusiasm started tinkering with engineering components in his little workshop. Eventually, he settled down to manufacture tube expanders and other heat exchanger tooling and called it “NIGASU Engineering Company”.
As the company grew, the need to provide outreaching services was felt Thus, under the auspices of Nigasu Engineering Company was born its partner firm “NIGASU Engineering Works”.

Founded in 1984 by K.L. Chatterjee, Nigasu Engineering Works is today arguably India’s leading service provider in the fields of Heat Exchanger Retubing, Tube expansion, Tube to tube sheet welding and allied activities.
We provide Retubing and allied services to Heat Exchanger/ Boiler operating customers including Fertilizer, Chemical and Petrochemical plants, Refineries, Power plants, Metal Smelting plants - practically all the plants dealing with process equipments.


What makes us different is that we are as much outreaching contractors as we are tool makers. Over the years, we have gathered a wealth of experience in both fields and are one of the preferred names in our field today.
Our customers are at the centre of everything we do and we believe in the ethos

“What the Customer wants, the Customer gets”

Most of our projects being shut down jobs, we have learnt to plan them meticulously, resource exhaustively and execute them to perfection with regards to Safety, Quality and on time completion.


Our Mission: To be a globally reputed, high quality provider of Heat Exchanger Tooling and Services, aimed at delighting customers while continually enriching its owners, team members and society as a whole.
  • Integrity
  • Reliability
  • Passion
  • Seamlessness
  • Meticulousness (Attention to detail)
  • Kaizen (Constant Improvement)
  • Curiosity
Business Goals:
  • To retain all existing customers
  • To continually win new customers
  • To continually improve our products and processes so as to meet and exceed our customers’ expectation
  • To recruit, retain, train and provide growth opportunities to capable people
  • To be a highly valued employer in our field
  • To remain sustainable as a business by generating surpluses.