Covers seamless and
welded, black and hot-dipped galvanized nominal
wall pipe. For coiling, bending, flanging and is
suitable for welding. Pipe ordered for this
specification is intended for use in free
protection system.
Kinds of Steel
Permitted For
For Pipe Material
Open-hearth
Electric-furnace
Basic-oxygen
Hot-Dipped
Galvanizing
Sets
standards for coating of pipe with zinc inside
and outside by the hot-dipped process. Weight of
coating must not average less than 1.8 oz per
square foot and not less than 1.6 per square ft.
Permissible Variations
in Wall Thickness
The
minimum wall thickness at any point shall not
vary by more than 12.5% under the nominal wall
thickness.
Chemical
Requirements
Grade A
Grade B
Furnace-Weld Pipe Type F
Carbon max.
%
0.25
0.30
-
Manganese %
0.95
1.20
-
Phosphorus,
max. %
0.05
0.05
0.08
Sulfur,
max. %
0.06
0.06
0.08
NDE and
Hydrostatic
Testing
Hydrostatic inspection test pressures for plain
end and threaded are specified. Hydrostatic
pressure shall be maintained for not less than 5
seconds for all sizes of seamless and electric
resistance weld pipe. Non destructive electric
test in accordance with practices E 213 or E 309
for the larger sizes. Pressure is maintained for
not less than 5 seconds.
Permissible Variations
in Weights per Foot
Plus
or minus 5%
Permissible
Variations in
Outside Diameter
Outside diameter at any point shall not vary
from standard specified more than-
For NPS 1 1/2 and Smaller Sizes: 1/64" over
1/32" under
For NPS 2 and Larger Sizes: 1% over 1% under
Number of
Tests Required
Flattening - tests are to be performed on
electric-resistance pipe, and furnace
welded pipe.
Lengths
Unless specified, pipe shall be furnished on
single random lengths or 16 to 22 ft.
Required Markings
on Each Length
(On Tags attached to
each Bundle in case
of Bundled Pipe)
Rolled Stamped or Stenciled (Mfrs. option)
Name or brand of the manufacturer
Electric-resistance welded A
Electric-resistance welded B
Seamless A / Seamless B,
Grade A or B for type E or S pipe
Wall thickness schedule ASTM A795
The letters NH if not hydrostatically tested
The length of pipe
General
Information
End
finish may be plain end beveled or plain end
square cut.
