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ASME BPVC 2023 Section II part A-2

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SA-587 ASME BPVC.II.A-2023
6.2 Flattening Test:
6.2.1 Asection of pipe not less than 4 in. 102 mm in length
shall be flattened cold between parallel plates in two steps. The
weld shall be placed 90° from the direction of the applied
force. During the first step, which is a test for ductility, no
cracks or breaks, except as provided for in 6.2.5, shall occur on
the inside or outside surfaces until the distance between the
plates is less than the value of H, calculated by the following
H 5 @~11et/@e1t/D 1
H = distance between flattening plates, in.,
t = specified wall thickness of the pipe, in.,
D = specified outside diameter of the pipe, in., and
e = deformation per unit length 0.09 for low-carbon steel.
6.2.2 During the second step, which is a test for soundness,
the flattening shall be continued until the specimen breaks or
the opposite walls of the pipe meet. Evidence of laminated or
unsound material, or of incomplete weld that is revealed during
the entire flattening test shall be cause for rejection.
6.2.3 Surface imperfections in the test specimens before
flattening, but revealed during the first step of the flattening
test, shall be judged in accordance with the finish requirements.
6.2.4 Superficial ruptures resulting from surface imperfections
shall not be cause for rejection.
6.2.5 When low D-to- t ratio tubulars are tested, because the
strain imposed due to geometry is unreasonably high on the
inside surface at the 6 and 12 oclock locations, cracks at these
locations shall not be cause for rejection if the D-to-t ratio is
less than 10.
6.3 Reverse Flattening TestA section 4 in. 102 mm in
length of pipe in sizes down to and including 1316 in. 20.6 mm
in outside diameter shall be split longitudinally 90° on each
side of the weld and the sample opened and flattened with the
weld at the point of maximum bend. There shall be no evidence
of cracks or lack of penetration or overlaps resulting from flash
removal in the weld.
6.4 Flange TestA section of pipe not less than 4 in. 102
mm in length shall be capable of having a flange turned over
at a right angle to the body of the pipe without cracking or
showing flaws. This flange, as measured from the outside of the
pipe, shall be not less than 18 in. 3.2 mm nor more than 12 in.
12.7 mm. Within these limits, the width of the flange shall be
not less than the percentages specified in Table 4.
7. Dimensions and Permissible Variations
7.1 Permissible Variations in Outside Diameter and Wall
ThicknessThe outside diameter and wall thickness variations
shall not exceed the limits prescribed in Table 1.

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7.2 Permissible Variations in StraightnessEach pipe shall
be straight within 0.030 in. 0.76 mm maximum deflection in
any 3 ft 0.91 m length to 8 NPS. For 8 NPS and above, pipe
shall be straight within 0.060 in. 1.52 mm maximum deflection
in any 3 ft 0.91 m length. Galvanized pipe shall be
reasonably straight.
7.3 Lengths:
7.3.1 Pipe may be ordered in definite cut lengths or in
random lengths as provided herein.
7.3.2 When ordered in definite cut lengths, the variation in
length shall not exceed the amounts prescribed in Table 5.
7.3.3 If definite lengths are not required, pipe may be
ordered in single random lengths of 16 to 22 ft 4.9 to 6.7 m
with 5 12 to 16 ft 3.7 to 4.9 m, or in double random lengths
with a minimum average of 35 ft 10.7 m and a minimum
length of 22 ft 6.7 m with 5 16 to 22 ft 4.9 to 6.7 m.
8. Workmanship, Finish, and Appearance
8.1 The finished pipe shall be free of injurious defects and
shall have a workman-like finish. Minor defects may be
removed by grinding, provided the wall thickness is not
reduced to less than the minimum thickness permitted for the
ordered nominal wall thickness.
8.2 The pipe shall have smooth ends free of burrs and free
of scale except that the pipe may have a superficial “blue”
oxide film on the surfaces.
8.3 For NPS 12 to 112 inclusive, the inside diameter welding
flash shall be removed so that the remaining flash does not
exceed 0.006 in. 0.15 mm. For NPS over 112, the remaining
inside diameter welding flash shall not exceed 0.010 in. 0.25
8.4 For all nominal sizes, the outside diameter welding flash
shall be removed flush with the outside diameter contour.
8.5 Undercut flash must be smoothly blended into the pipe
8.6 The intent of the flash conditions as prescribed in 8.3,
8.4, and 8.5 is to obtain a surface contour suitable for flanging.
9. Number of Tests
9.1 Two tensile tests as specified in 6.1 shall be made from
each heat.
9.2 The flattening test as specified in 6.2 shall be made on
two lengths of pipe from each lot of 250 lengths or fraction
TABLE 4 Flange Requirements
Outside Diameter of Pipe, in. Width of Flange, of OD
Over 34 to 212, incl 15
Over 212 to 334, incl 1212
Over 334 to 412, incl 10
Over 412 to 658, incl 712
Over 658 5
TABLE 5 Permissible Variations in LengthA