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Heat Exchanger Tubes

Major application for Ratnamani's Stainless Steel / Titanium Tubes is in the manufacturing of Shell and Tube type Heat Exchangers.

Shell and Tube Heat Exchangers:

Shell and Tube Heat Exchangers are defined as heat exchangers that can transfer heat from one fluid/medium to another fluid/ medium. A Fluid/Medium passes through a set of tubes while another fluid/medium passes through the shell that encloses the tubes. Shell and Tube Heat Exchangers are used in applications in processes involving high temperature and pressure.

There are two types of Shell and Tube Heat Exchangers used in industrial applications :

  • U- Tube Heat exchangers
  • Straight Tube Heat exchangers

There are several factors, which are to be taken into account while manufacturing Heat Exchanger Tubes i.e. dimensional tolerances for diameter, wall thickness, length, eccentricity, requisite Mechanical properties, Corrosion resistance and surface finish etc.

Ratnamani is one of the major manufacturers of Stainless Steel Heat Exchanger Tubes in welded and seamless construction for applications in Power generation i.e. Nuclear, Thermal and Solar Power Plants , Refinery and Petrochemical, Oil and Gas, Chemical and Fertilizer, Process Industries , Defence , Atomic energy and Aerospace , Pulp and Paper Industries etc.

Salient Features


Hot Extruded Mother Hollows are used to manufacture tubes for producing finished tubes

Good surface finish

Ability to produce tubes with

  • Closer Dimensional Tolerances
  • Closer hardness values
  • Special chemistry as per customer requirements
  • Stringent NDT Testing including Ultrasonic Testing, Eddy Current Testing etc.

Good Corrosion resistance

Manufacturing of Instrumentation Seamless Tubes

Products Size/Range Thickness Specification
Instrumentation Tubes 3.00 MM to 25.40 MM OD 0.50 MM to 6.00 MM ASTM A 213, A 269,
A 789 EN 10216-5
Tubes can also be supplied as per AFNOR, GOST, JIS, EN specification.
Grades : TP-304/L/LN/H/N,TP-316/L/LN/H/N/Ti,TP-317L/ LM,TP-321/H,TP-347/H, UNS S31254, UNS N08904/ Various grades as per European Norms UNS S31803, S32205, S32750, S32760
*Sizes and Specifications other than above can be manufactured on request

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