| ASTM
A-134 |
SPECIFICATIONS
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STANDARD
SPECIFICATION
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ASTM A-134-XX (XX=
Represents year of last revision)
PIPE, STEEL, ELECTRIC-FUSION
(ARC)-WELDED :
Sizes - 16" DIAMETER AND OVER
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SCOPE
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This specification
covers electric-fusion (arc)-welded
straight seam or spiral seam steel
pipe of 16 in. and over in
diameter1
(inside or outside) with wall
thickness up to ¾ in., inclusive.
Pipe having other dimensions may
be furnished provided such pipe
complies with all other requirements
of this specification.
1
Acceptability for
many services may be controlled
by codes of standards such as
those published by the American
National Standards Institute and
American Society of Mechanical
Engineers (ASME).
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MATERIAL
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The steel from which the pipe is
made shall conform to specifications
A-283/A-283M, A-285/A-285M, A-570
or A-36/A-36M or to other ASTM
specifications for equally suitable
weldable material.
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MANUFACTURE
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All longitudinal seams, spiral
seams, and shop girth seams shall
be butt-welded. The weld shall
be made by automatic means except
for the assembly and the repairs
that can be done by manual procedure.
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HYDROSTATIC
TEST
TIME
OF TESTING
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Each
length of pipe shall be tested
by the manufacturer to a hydrostatic
pressure that will produce in
the pipe wall a stress of 60%
of the specified minimum yield
point of the steel used at room
temperature. The pressure shall
be determined by the following
equation : P=2St/D
Where :
P=
minimum
hydrostatic test pressure, psi
(not to exceed 2800 psi)2
S= 0.60 times the minimum specified
yield point of the steel used,
psi (M Pa)
t=
specified
wall thickness, in.
D=
specified
outside diameter, in.
2
= When
the diameter and wall thickness
of pipe are such that the capacity
limits of testing equipment are
exceeded by these requirements,
the test pressures may be reduced
by agreement between the purchaser
and the manufacturer.
Test pressure shall be held for
not less than 5 sec, or for a
longer time as agreed upon between
the purchaser and the manufacturer.
Note: When agreed upon between
the purchaser and the manufacturer
and so stated on the order, pipe
may be tested to 1 and ½ times
the specified working pressure,
except that the maximum test pressure
shall not exceed 2800 psi nor
shall the maximum fiber stress
exceed 85% of minimum yield point.
When specified in the order, pipe
may be furnished without hydrostatic
testing, however each length so
furnished shall include the mandatory
marking of the letters " NH ".
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TEST
AND NUMBER OF PRODUCTION WELD TESTS
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The weld-test specimens for the reduced-section
tension test shall be taken perpendicularly
across the weld and the test pieces
shall have the weld in the middle
of the specimen.
One weld test for the reduced-section
tension shall be made from each lot
of 3000 ft. of pipe or fraction thereof
of each size and wall thickness.
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PERMISSABLE
VARIATIONS IN WEIGHTS AND DIMENSIONS
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Thickness
and Weight :
The wall thickness and weight for
welded pipe under this specification
shall be governed by the requirements
of the specifications to which the
steel was ordered.
Circumference :
The outside
circumference of the pipe shall not
vary more than ± 0.5% from the nominal
outside circumference based upon the
diameter specified on the order.
Straightness :
Finished pipe
shall be commercially straight. When
specific straightness requirements
are desired, the order should so state,
and the tolerances shall be a matter
of agreement between the manufacturer
and the purchaser.
Ovality
(out-of-roundness) : The
difference between major and minor
outside diameter shall not exceed
1%. Closer tolerances may be established
by agreement between the manufacturer
and the purchaser.
Length
: The
lengths shall be as specified on the
order with a tolerance of ± 1/2".
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FINISH
OF THE ENDS
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Pipe shall be furnished with a plain
right angle cut or with bevel ends
as specified.
Unless otherwise specified, pipe with
beveled ends shall meet the requirements
of ANSI B16.25.
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FINISH
OF THE PIPES
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The repairs by welding of damages in
the pipe wall, provided their depth
does not exceed 1/3 the specified
wall thickness, will be permitted.
Defects in the welds, such as sweats
or leaks, shall be repaired or the
piece rejected at the option of the
manufacturer. All repaired pipe shall
be tested hydrostatically.
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MARKING
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Each section of pipe shall be marked
with the manufacturer’s distinguishing
marking, this specification number
and the pipe grade.
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NOTE:
This is a summary of ASTM specifications.
For additional details and information, please
refer to these specifications.
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SPECIFICATION
ASTM A-134
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MIN
MECHANICAL PROPERTIES
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STEEL
GRADE
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Tensile
strength ,min Ksi
( Mpa )
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Yield
strength, min Ksi ( Mpa )
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Elongation
in 2 inches
(50 mm)% min.
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| ASTM
A-36 / A-36 M |
58-80
( 400-550 )
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36
( 250 )
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23
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| ASTM
A-283 / A-283 M gr A |
45-60
( 310-415 )
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24
( 165 )
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30
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| ASTM
A-283 / A-283 M gr B |
50-65
( 345-450 )
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27
( 215 )
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28
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| ASTM
A-283 / A-283 M gr C |
55-75
( 380-515 )
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30
( 205 )
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25
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| ASTM
A-283 / A-283 M gr D |
60-80
( 415-550 )
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33
( 230 )
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23
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| ASTM
A-285 / A-285 M gr A |
45-65
( 310-450 )
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24
( 165 )
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30
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| ASTM
A-285 / A-285 M gr B |
50-70
( 345-485 )
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27
( 215 )
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28
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| ASTM
A-285 / A-285 M gr C |
55-75
( 380-515 )
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30
( 205 )
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27
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| ASTM
A-570 / A-570 M gr 30 |
49
( 340 )
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30
( 205 )
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25
( 6 @ 2.5 mm )
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| ASTM
A-570 / A-570 M gr 33 |
52
( 360 )
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33
( 230 )
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23
( 6 @ 2.5 mm )
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| ASTM
A-570 / A-570 M gr 36 |
53
( 365 )
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36
( 250 )
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22
( 6 @ 2.5 mm )
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| ASTM
A-570 / A-570 M gr 40 |
55
( 380 )
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40
( 275 )
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21
( 6 @ 2.5 mm )
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| ASTM
A-570 / A-570 M gr 45 |
60
( 415 )
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45
( 310 )
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19
( 6 @ 2.5 mm )
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| ASTM
A-570 / A-570 M gr 50 |
65
( 450 )
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50
( 345 )
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17
( 6 @ 2.5 mm )
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| ASTM
A-570 / A-570 M gr 55 |
70
( 480 )
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55
( 380 )
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15
( 6 @ 2.5 mm )
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To contact us : info@spiralco.com
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