Technical Specifications

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    A INDIAN STANDARDS
    • IS 1367 – Low Carbon and Alloy Steel High Tensile Bolts, Nuts, Studs, to meet technical specifications as above physical and chemical.
    • IS 3757 – High Tensile Friction Grip Bolts.
    • IS 6623 – High Tensile Friction Grip Nuts.
    • IS 6649 – High Tensile Friction Grip Washers.
    • IS 6639 – Hexagon Bolts for Steel structure.
    • IS 6610 – Heavy washer for Steel structure.
    • IS 3640 – Hexagon Fit Bolts.

    AMERICAN STANDARDS
    • ASTM 193 – Alloy steel Bolt & Studs for High Temperature applications
    • ASTM 194 – Carbon & Alloy steel Nuts for high pressure & High Temperature applications
    • ASTM 320 – Alloy steel Bolts & studs for low temperature applications.
    • ASTM 325 – High Tensile Bolts for structural application with Nuts & washers to equivelant standards.
    • ASTM 307 – Low Carbon Bolts, Studs etc. for C.I. flanges etc.

    Over and above Bolts & Nuts to following standards are also manufactured.
    ASTM, A 354, A 437, A 449, A 453, A 490, A 540, A563, A 574.

    BRITISH STANDARDS
    • BS 1083 – Alloy steel High Tensile Fasteners.
    • BS 3132 & BS 4395 - High Tensile friction Grip Bolts, Nuts and Washers.

    GERMAN STANDARDS
    • DIN 931 & 933 – For High Tensile Bolts.
    • DIN 939– For High Tensile Studs.
    • DIN 934 - For High Tensile Nuts and other German Standards.


DIMENSIONAL STANDARDS

A INDIAN STANDARDS
  • Bolts- IS 1364, IS 3757, IS 3640, IS 6639.
  • Studs- IS 1862.
  • Nuts- IS 1364, IS 6623.
  • Washers- IS 6648, IS 6610, IS 2016.

Threads as per IS 4218.

AMERICAN STANDARDS
  • B. S. 1768 ANSI 18 2 1 –
  • Threads as per BS 1580.
  • ASTM – A 193 – for High Pressure & High Temperature Bolts & Studs.
  • ASTM – A 194 – for High Pressure & High Temperature Nuts.
  • ASTM – A 320 – for Low Temperature Bolts, studs including austenitic stainless steel.

This specifications cover High grade of alloy steel Fasteners Material suitable for pressure vessels, Flanges & fittings applications having temperature range from – 253° C (-425° F) to 600° C (1100°F). All Fasteners made by RUPEN INDUSTRIES are Thread Rolled after Heat Treatment Before Thread Rolling a decarb layer containing Micro quenching cracks are removed by special grinding process, which increase the fotique strength by three times and fatique life by more that hundred times.


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