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Dimensional tolerances to
the nominal values of thickness are +/-10% but not less than +/- 0.2
mm. outside welding area.
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Outside diameter of pipes
with circular section is +/- 1% but not less than +/- 0.5 mm.
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Outside dimensions of
pipes and profiles with other shapes of cross sections are +/- 1 %
but not less than +/0.5 mm.
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Straightness tolerance
max. 0.2% of the total length
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Twist 2 degree per
meter length.
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Tensile strength
33-47 kg/mm.2.
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Hydrostatic
pressure for test 50 kg/cm2.
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Tolerance in
weight in the tables is +/- 3%.
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Tolerance in total
quantity per order is +/- 5%.
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Inside and outside
pipes slight surface defects and corrosion (not in galvanized pipes)
due to the process of manufacturing are permitted provided that
mechanical and chemical characteristics of steel are not affected.
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Pipes and sections are
produced in standard length of 6 meters, with 5% max. of the total
quantity in length of 4 meters.
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Threaded and unthreaded
pipes.
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Pipes are supplied with
or without caps and multi-purpose couplings.
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In case special
requirements are demanded by customers for special sizes and
purposes, the requirements are not necessarily applicable to the
specified norm of manufacturing.
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High quality production,
anti-rust and anti-corrosion protection.
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The finished products are
tested by technology pressure equipment.
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Reliable and long-term
service products supplied with bills of warranty.
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