• Overview
  • Salient Features
  • Applications
  • Manufacturing Range
  • Testing & Inspection
  • Download Brochure
  • Quick Inquiry

Nickel Alloy Seamless Heat Exchanger Tubes

Ratnamani has a dedicated facility of manufacturing Nickel Alloy Seamless Tubes.

The facility is equipped with 1750 MT capacity of Water Hydraulic Hot Extrusion Press. The Hot Extrusion Press is the core strength of the Company enabling to produce Mother Hollows with closer dimensional tolerances and good surface finish. Ratnamani is self-sufficient in manufacturing of Mother Pipes with special chemistry.

The Hot Extruded Mother Hollows are used for manufacturing Nickel Alloy Seamless Heat Exchanger Tubes. The tubes are manufactured using High Speed Cold Pilger Mill and modern Draw Benches. The tubes are heat treated in Off-Line Bright Annealing / Conventional Annealing furnaces.

Ratnamani has the facility to supply tubes with lower residual stress values, which plays an important role in service life of High Pressure Heat Exchanger Tubes.

Ratnamani has a dedicated facility for manufacturing Tubes in U bend Solution Annealed condition upto developed length of 40 meters.

Salient Features

  • Hot Extruded Mother Pipes as a source of raw material
  • Ability to supply tubes with stringent NDT Testing, Special Chemistry, Lower Residual Stress values, OD Polishing, closer Dimensional Tolerance, higher Corrosion Resistance etc
  • Supply condition
    • - Bright Annealed / Solution Annealed & Passivated
    • - Stabilization Heat Treatment
    • - Straight / U bend condition having developed length upto 40 meters


  • Oil & Gas Exploration
  • Petrochemicals and Refineries
  • Fertilizer Plants
  • Chemical Industries
  • Thermal, Nuclear and Solar Power Plants
  • Atomic Energy
  • Desalination Plants
  • Aerospace
  • Defence
  • Pharmaceutical
  • Food and Dairy
  • Automobile
  • Sugar
  • Paper Industries
  • Marine
  • Cross Country Pipe Line for Gas & Water
  • Pipes for Engineering purpose

Manufacturing of Nickel Alloy Seamless Heat Exchanger Tubes

Products Size/Range Thickness Specification
Heat Exchanger Tubes 6.00 MM to 76.00 MM OD 0.7 MM to 6.00 MM SB 163, SB 167,SB 407, SB 423, SB 444 U-Tubes as per Customer's Drawing. Tubes can also be supplied as per AFNOR, GOST, JIS, EN specification.
Grades : UNS N04400, N06600, N06625, N08028, N08800, N08810, N08825
*Sizes other than above can be manufactured as per requirement

Testing & Inspection

  • Mechanical Testing & Chemical Analysis
  • Fully equipped laboratory for Corrosion Testing, Chloride Contamination Testing, Bath Analysis Testing, Die Penetrant Test & Residual Stress Measurement
  • Micro Structure Examination / Analysis
  • Laboratory Spectrometer & Portable Spectrometer
  • Positive Material Identification [PMI] Tester
  • Hydro Testing –SS Straight & U-Tubes and CS Pipes
  • Air Under Water Testing – Straight Length upto 30 Meters
  • Ferrite Content & Surface Finish
  • Fibroscope – Inside surface checking of Tubes having outside diameter 4.7 MM and above
  • Surface Roughness Testing
  • Non Destructive Testing offered
    • - Eddy Current Testing
    • - Ultrasonic Testing with full body thickness measurement
    • - Real Time Digital Radiography Testing
    • - Conventional Film Radiography

Download Brochure

Quick Inquiry