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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。
& q5 I3 j1 `3 P3 L+ DASTM A335 ：) r3 x1 l" _. o' C( c; t* \
14. Mechanical Tests Required$ P9 [( J$ b3 x& C. v6 m; c X( p6 b
14.1 Transverse or Longitudinal Tension Test and Flattening; l. U7 p% R! x/ Y
Test, Hardness Test, or Bend Test—For material heat O5 L* j" k. x0 S3 I7 w
treated in a batch-type furnace, tests shall be made on 5 % of3 K1 o+ K T& X V. r
the pipe from each treated lot (see Note 7). For small lots, at
4 O0 k# ~7 `6 I$ wleast 1 pipe shall be tested. For material heat treated by the
( |: d7 w0 \6 ]8 J) jcontinuous process, tests shall be made on a sufficient number1 J ], d5 v! a8 i2 {4 m
of pipe to constitute 5 % of the lot (see Note 7), but in no case, Y& [4 Y; j* b7 U
less than 2 pipe.
* J) A3 S! n& H- iNOTE 7—The term “lot” applies to all pipe of the same nominal size# z1 A$ w+ r' ?& k& k; D
and wall thickness (or schedule) which is produced from the same heat of
! E4 T0 ]7 K) g# Ysteel and subjected to the same finishing treatment in a continuous8 ?3 o) R2 N |+ i- `: n
furnace; when final heat treatment is in a batch-type furnace, the lot shall7 L% K4 Y0 b6 ?( N) ]" i- ~4 B
include only that pipe which is heat treated in the same furnace charge.: V) M2 ]" k! F* ~3 p1 M, q& a
14.2 Hardness Test:, q( ^. D1 m) o
14.2.1 For pipe of Grades P91, P92, P122, P911, and P36,, P. k; i' m1 | }! C: c+ _
Brinell, Vickers, or Rockwell hardness tests shall be made on
3 |7 C$ t+ k( [% B1 Wa specimen from each lot (see Note 7).) S9 _& Y- @. V
14.3 Bend Test:
1 i- b) L- J, n; J! H14.3.1 For pipe whose diameter exceeds NPS 25 and whose
$ y8 [( W( h! O' U/ [, H: Udiameter to wall thickness ratio is 7.0 or less shall be subjected
* R( s" {3 O) W+ F) Ito the bend test instead of the flattening test. Other pipe whose% y& p5 A8 ?9 S% f: g: r4 V
diameter equals or exceeds NPS 10 may be given the bend test
1 w3 R* P+ B' T6 _8 _/ ain place of the flattening test subject to the approval of the
+ \+ j8 j$ P* k! I2 opurchaser.
0 A' ?, \: L+ l/ o0 c14.3.2 The bend test specimens shall be bent at room
+ ^' E/ n; b0 n/ k: J, ^' I9 ?temperature through 180° without cracking on the outside of3 t: `" @+ j) h9 @# h
the bent portion. The inside diameter of the bend shall be 1 in.
' R) H1 G6 O+ @- {+ f[25 mm].
1 }" {3 |6 {& G% t4 B( I7 h' F14.3.3 Test specimens for the bend test specified in 14.3
7 a% Q) m2 G5 I% g d2 gshall be cut from one end of the pipe and, unless otherwise. a9 g* W3 R2 O% P9 H
specified, shall be taken in a transverse direction. One test3 [) k2 s) Q) D5 Q q
specimen shall be taken as close to the outer surface as possible
3 Y E/ V' H. B5 `0 J- S1 Mand another from as close to the inner surface as possible. The
- y( e0 ~, I3 k5 O$ r9 a% tspecimens shall be either 1⁄2 by 1⁄2 in. [12.5 by 12.5 mm] in5 X1 h0 {- b5 O" I/ l
section or 1 by 1⁄2 in. [25 by 12.5 mm] in section with the
0 f' m7 {5 N" O Xcorners rounded to a radius not over 1⁄16 in. [1.6 mm] and need
; d! i: u: E8 h, R8 onot exceed 6 in. [150 mm] in length. The side of the samples7 o" T; t, o! _* Q. v2 x
placed in tension during the bend shall be the side closest to the
' M" R$ B9 C- h# D% `- m! \+ Dinner and outer surface of the pipe, respectively.) s9 A* j0 |; ]
, L% \" B2 R+ V2 J( O附录SUPPLEMENTARY REQUIREMENTS
$ w' V' p' G0 K( p2 }- |One or more of the following supplementary requirements shall apply only when specified in the
( Y, P- A$ y0 I! Jpurchase order. The purchaser may specify a different frequency of test or analysis than is provided) }/ G, T5 e$ @* _- S! M) o
in the supplementary requirement. Subject to agreement between the purchaser and manufacturer,1 G1 c5 I2 X4 E1 v; s/ V: r, s% J8 Y/ }
retest and retreatment provisions of these supplementary requirements may also be modified.+ {8 c5 O; h& }8 m( ~% `4 R
S1. Product Analysis
, B# W& P) w- @6 Q( m- @: XS1.1 Product analysis shall be made on each length of pipe.+ F. k0 E0 G; w D7 y- @
Individual lengths failing to conform to the chemical composition2 F5 N; V, I7 @" c# a$ r e
requirements shall be rejected.
2 E Z: c* x: b3 z, m8 DS2. Transverse Tension Tests. k: i) O# J$ q$ U0 K' x/ A I9 I
S2.1 A transverse tension test shall be made on a specimen1 x9 G* B4 S# F3 U1 |, m, r
from one end or both ends of each pipe NPS 8 and over. If this
; F1 F f7 f: e% ?6 zsupplementary requirement is specified, the number of tests per- L/ |9 I% X; c1 J
pipe shall also be specified. If a specimen from any length fails5 H9 x0 R; c& P S! `5 Y
to meet the required tensile properties (tensile, yield, and
2 q2 y( ?1 b" v2 u9 b8 M* v3 k) L& q. telongation), that length shall be rejected subject to retreatment! t5 T/ s/ c5 e2 X- j* j, X0 F) Y
in accordance with Specification A 999/A 999M and satisfactory" j% R! n- m- z$ E* s' f; B
retest.% r: \, G' V: {6 C! U q- ?
S3. Flattening Test1 [/ v5 h" ~9 e/ m- A4 R* y
S3.1 The flattening test of Specification A 999/A 999M. W9 p- c% }# I3 T
shall be made on a specimen from one end or both ends of each
1 C/ L9 k" P! zpipe. Crop ends may be used. If this supplementary requirement; v" \( w9 ~+ `$ I
is specified, the number of tests per pipe shall also be
, K) A4 m5 t. X; l+ y9 ]1 Nspecified. If a specimen from any length fails because of lack. T+ _' X" g. {) p
of ductility prior to satisfactory completion of the first step of
2 ?' r# v5 T8 Q& J! ~! ?0 ethe flattening test requirement, that pipe shall be rejected8 k1 M. K* y, V
subject to retreatment in accordance with Specification A 999/- S9 f# {( W" m7 w
A 999M and satisfactory retest. If a specimen from any length
: U. p$ D$ P& ~% w7 {& [3 @of pipe fails because of a lack of soundness that length shall be
V5 N9 K9 o: A7 r4 |rejected, unless subsequent retesting indicates that the remaining
. V9 ~. K: a1 ?5 \length is sound. The bend test of 13.2 shall be substituted
3 i' u+ Q' f, j7 Sfor the flattening test for pipe whose diameter exceeds NPS 25* r) n, r; j2 R
and whose diameter to wall thickness ratio is 7.0 or less. |
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发表于 2008-3-13 13:24:11