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Nickel Alloy Seamless Instrumentation Tubes

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

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


  • 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 Instrumentation Tubes

Products Size/Range Thickness Specification
Instrumentation Tubes 3.00 MM to 25.40 MM OD 0.50 MM to 6.00 MM SB 163, SB 167,SB 407, SB 423, SB 444 Tubes can also be supplied as per AFNOR, GOST, JIS, EN specification.
Grades : UNS N04400, N06600, N06625, N08800, N08825
*Sizes and Specifications other than above can be manufactured on request

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

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