ASTM A335钢管是否必须做压扁试验

shixin1

在国外采购的ASTM A335 P5 钢管，型号8”（219mm），壁厚8.18mm,国外工厂说合同中如果没有约定就不必做压扁试验和弯曲试验，理由是根据A335 附录说明及S3条规定压扁试验作为订货是选择要求，我的理解是A335 14条规定了压扁试验，那么就应该无条件的去做，英文我不太懂，哪位专家帮我落实一下。
' O9 w: S1 V( {, J$ C5 eASTM A335 ：
14. Mechanical Tests Required
# x0 G* a0 ^4 n4 g14.1 Transverse or Longitudinal Tension Test and Flattening
Test, Hardness Test, or Bend Test—For material heat
2 w6 ?( y  z& [. |+ k. Ktreated in a batch-type furnace, tests shall be made on 5 % of
the pipe from each treated lot (see Note 7). For small lots, at
least 1 pipe shall be tested. For material heat treated by the
7 H3 [6 h& U2 A  econtinuous process, tests shall be made on a sufficient number
of pipe to constitute 5 % of the lot (see Note 7), but in no case
$ H: P* w; i+ F- M, E0 j' ^& @less than 2 pipe.
NOTE 7—The term “lot” applies to all pipe of the same nominal size
& h% |! |$ E/ k- `. V! J9 Oand wall thickness (or schedule) which is produced from the same heat of
: H  @( L' L1 w7 L! k. l" g* zsteel and subjected to the same finishing treatment in a continuous
furnace; when final heat treatment is in a batch-type furnace, the lot shall
include only that pipe which is heat treated in the same furnace charge.
- w1 `) u7 O+ h4 T/ C$ ?14.2 Hardness Test:
* m& M$ w5 r# F$ N. V! t14.2.1 For pipe of Grades P91, P92, P122, P911, and P36,
Brinell, Vickers, or Rockwell hardness tests shall be made on
a specimen from each lot (see Note 7).
8 z/ t+ d2 a) I& ~8 I14.3 Bend Test:
14.3.1 For pipe whose diameter exceeds NPS 25 and whose
. h! n: Y* c5 b# a6 b+ ediameter to wall thickness ratio is 7.0 or less shall be subjected
to the bend test instead of the flattening test. Other pipe whose
' {/ C' C$ l& p) F* `: |diameter equals or exceeds NPS 10 may be given the bend test
in place of the flattening test subject to the approval of the
purchaser.
1 Y9 k$ S0 q5 ^$ E' o0 i14.3.2 The bend test specimens shall be bent at room
' ^0 l' x5 k1 W% ]temperature through 180° without cracking on the outside of
the bent portion. The inside diameter of the bend shall be 1 in.
[25 mm].
) t. Y) k- X2 N. `" m# t4 Z1 D/ I14.3.3 Test specimens for the bend test specified in 14.3
shall be cut from one end of the pipe and, unless otherwise
specified, shall be taken in a transverse direction. One test
8 C  ^9 ?1 K/ v* u( x  Z5 xspecimen shall be taken as close to the outer surface as possible
and another from as close to the inner surface as possible. The
. V6 x; a: d/ E& @$ Mspecimens shall be either 1⁄2 by 1⁄2 in. [12.5 by 12.5 mm] in
section or 1 by 1⁄2 in. [25 by 12.5 mm] in section with the
corners rounded to a radius not over 1⁄16 in. [1.6 mm] and need
9 u6 a- F# P' _; k3 b/ f5 b& K: {not exceed 6 in. [150 mm] in length. The side of the samples
placed in tension during the bend shall be the side closest to the
inner and outer surface of the pipe, respectively.
; V& `( w2 M! z5 H
; h2 a6 d' p: y8 h附录SUPPLEMENTARY REQUIREMENTS
One or more of the following supplementary requirements shall apply only when specified in the
0 t. @, X# \. o$ Fpurchase order. The purchaser may specify a different frequency of test or analysis than is provided
( \) C! Y, i! O! Q: kin the supplementary requirement. Subject to agreement between the purchaser and manufacturer,
retest and retreatment provisions of these supplementary requirements may also be modified.
6 R/ t- H3 D' SS1. Product Analysis
; j1 R" ~' `6 Q/ Z3 bS1.1 Product analysis shall be made on each length of pipe.
Individual lengths failing to conform to the chemical composition
" p# [+ X* B5 j9 Y( o' Srequirements shall be rejected.
S2. Transverse Tension Tests
( O) k/ w* U+ v3 uS2.1 A transverse tension test shall be made on a specimen
4 b) x+ \$ O5 Q3 t4 nfrom one end or both ends of each pipe NPS 8 and over. If this
supplementary requirement is specified, the number of tests per
2 ~! B! l4 U. Hpipe shall also be specified. If a specimen from any length fails
to meet the required tensile properties (tensile, yield, and
elongation), that length shall be rejected subject to retreatment
! ~1 s: j5 N0 b! d% {( Lin accordance with Specification A 999/A 999M and satisfactory
retest.
S3. Flattening Test
) Z9 ^* M3 n( mS3.1 The flattening test of Specification A 999/A 999M
shall be made on a specimen from one end or both ends of each
pipe. Crop ends may be used. If this supplementary requirement
1 O8 o3 M" w3 S4 a9 E! s' mis specified, the number of tests per pipe shall also be
specified. If a specimen from any length fails because of lack
" J/ ~. _3 V) D1 t* @3 dof ductility prior to satisfactory completion of the first step of
, o# e$ d2 h; s" c5 k7 F7 }1 ethe flattening test requirement, that pipe shall be rejected
; J, F( r' ^. d+ Q' N( T8 ]subject to retreatment in accordance with Specification A 999/
A 999M and satisfactory retest. If a specimen from any length
of pipe fails because of a lack of soundness that length shall be
& X# y1 A# b+ @- v7 jrejected, unless subsequent retesting indicates that the remaining
" ^4 R8 s5 c$ r+ ~: Y" L; Ilength is sound. The bend test of 13.2 shall be substituted
for the flattening test for pipe whose diameter exceeds NPS 25
and whose diameter to wall thickness ratio is 7.0 or less.