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Pipe Specification A135
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Specification |
A135
NPS 1/4 -- 30", Schedules 10, 40 and XL THD,
Lightwall |
|
Scope |
Covers two grades of electric resistance welded
steel pipe. Grade A is adapted for flanging and
bending and is suitable for welding. Purpose for
which pipe is intended should be stated on
order.
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Kinds of Steel
Permitted For
For Pipe Material |
Open-hearth
Electric-furnace
Basic-oxygen |
Hot-Dipped
Galvanizing |
Not covered in
specification. |
Permissible Variations
in Wall Thickness |
The
minimum wall thickness at any point shall not be
more than 12.5% under the nominal wall thickness
specified. Threadable, lightwall (XL) must meet
manufacturers minimums. |
Chemical
Requirements |
| |
Grade A |
Grade B |
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Carbon max.
% |
0.25 |
0.30 |
|
Manganese % |
0.95 |
1.20 |
|
Phosporous,
max. % |
0.05 |
0.05 |
|
Sulfur,
max. % |
0.06 |
0.06 |
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Tensile
Requirements |
|
Seamless |
| |
Grade A
|
Grade B |
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Tensile Strength, min., psi |
48,000
|
60,000 |
|
Yield Strength, min., psi |
30,000 |
35,000 |
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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 electric resistance
weld pipe. Non-destructive electric test should
be in accordance with practices E213, method
E227 or practice E213. |
Permissible Variations
in Weights per Foot |
Plus
or Minus 10% schedule 10
Plus 10% minus 3 1/2% schedule 40 |
Permissible
Variations in
Outside Diameter |
Plus or minus 1%
|
Mechanical Tests
Specified |
Tensile Test -- Transverse returned on pipe NPS
8 and larger.
Flattening test -- Three steps required with
weld located 0° or 90° from the line of
direction of force required. |
Number of
Tests Required |
Flattening and tensile on one length of pipe
from each lot of 400 lengths or less of a style. |
|
Lengths |
Pipe
shall be furnished in 38' with a minimum of 20
ft. Pipe furnished to schedule 10 shall be in a
specified length between
16 and 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 manufacturer.
•
Kind of pipe, that is;
• Electric-resistance
welded A / electric welded B
• Same schedule wall
thickness, schedule 10 or 40, NL
ASTM A135
•
Length of pipe |
General
Information |
End
finish may be plain end beveled or plain end
square cut. |
