Gandhi Special Tubes Limited (ISO/TS 16949:2009 and ISO 9001:2008) set up its plant in technical collaboration with BENTELER STAHL/ROHR GMBH & CO.AG of Germany, and is engaged in manufacturing of Cold Drawn Seamless Tubes.
- Outer Diameter: From 3.0 mm up to 75 mm.
- Wall Thickness: From 0.5 mm up to 7.5 mm.
- DIN 2391
- DIN 2445
- DIN 17175
- EN 10305-1 & EN10305-4
- EN 10216-2
- DIN 73000
- ISO 8535
- BS 980
- BS 3059
- IS 3601
- IS 3074
- SEE J 524
- SAE J 1958
- SA 179
- SA 210
- SA 334
Strict measures are taken to ensure Scale free and bright tubes with high degree of internal cleanliness. All the tests as per specifications are carried out stage wise to ensure that tubes meet desired specifications.
- Tensile Test
- Hydrostatic pressure Test.
- Eddy Current Test
- Flattening, Flaring, Bending Test
- Surface roughness Test
- Hardness Test
- Burst Test
- Salt spray Test to test Phosphating
- Chemical Composition
- Metallurgical & Stereo Microscopy
- Dimensional Checks
- Scale free bright tubes as annealed/normalized in bright annealing furnace under reducing atmosphere
- Tubes are manufactured out of fully Aluminum killed steel only to avoid problem of ageing which can lead to embrittlement & cracks.
- Surface roughness will be below 2 Microns Ra value for fuel injection Tubes
- Uniformly annealed soft tubes, suitable for proper ferrule biting.
- Reliable source of raw material.
- Tubes can be supplied with even closer dimensional tolerance than permitted by various codes/specifications, subject to prior agreement.
- Quality Assurance System as per ISO/TS 16949 for Automotive applications & ISO/9001 for Non-Automotive applications
Plant for manufacturing ERW (Precision Electric Resistance Welded) Tubes was set up by us in technical collaboration with BENTELER STAHL/ROHR GMBH & CO.AG of Germany. The project involved manufacturing of small diameter precision welded steel tubes.
- Outer Diameter: From 3.1 mm up to 12.7 mm.
- Wall Thickness: From 0.5 mm up to 1.5mm.
(Tubes can be supplied in straight lengths or in coil form.)
- DIN 2393
- DIN 2394
- EN 10305-2
- SAEJ 526
- SAEJ 356 etc or equivalent
Strict measures are taken to ensure Scale free and bright tubes with high degree of internal cleanliness conducting following tests:
- Bubble Test to check Leakages with dry nitrogen under water @ 70 bar pressure.
- Tensile Test
- Flattening, Flaring, Bending Test
- Eddy Current Test
- Micro hardness Test
- Chemical Composition
- Metallurgical & stereo Microscopy
- Dimensional checks
The precision welded steel tubes are manufactured using the latest and most advanced technology. Raw material is DD/EDD grade low carbon steel CRCA coils. The process involves continuous Forming, Direct Current Welding, and Sizing by passing through a set of stretch reducing rolls and thereafter followed by bright annealing in continuous roller hearth Furnace under reducing atmosphere. The resultant tubes are Soft, Scale free and Bright having excellent physical properties.
The tubes are pressure tested at @ 70 kg/cm2 pressure with dry nitrogen under water before straightening and finishing operations. The continuous manufacturing process enables supply of the tubes in straight lengths & coils up to 1000 meters.
Consistent with the philosophy of the Company to manufacture world class products, we started manufacturing Cold Formed Coupling (Tube) Nuts in our plant at Halol, Gujarat. These nuts were earlier being manufactured by machining in India. State of the art plant includes imported six station Cold Formers, 3 die thread rolling machines and tapping machines for rolled as well as machined threads.
- Across Flat: Maximum 24 mm
Zinc Plating with Trivalent Blue or yellow passivation or Olive Green/yellow passivation
AISI 1010 or equivalent. Other Steel Grades can be considered on request.