ASME B31.3 Process piping -2006:5 P' r6 \7 R6 I
345.9 Alternative Leak Test 6 m1 v5 @7 F9 B r4 ^The following procedures and leak test method may' l' C* Q* U# ^9 I0 ]# \0 y8 B
be used only under the conditions stated in para. 4 W; P: A: D) A4 w345.1(c).( Q0 V% r _6 }; e& P$ W
345.9.1 Examination of Welds. Welds, including 8 F; k) r. m, k/ a2 pthose used in the manufacture of welded pipe and fittings,+ P% U5 K9 Z+ v" i
which have not been subjected to hydrostatic or 1 V* l+ ?9 t- ipneumatic leak tests in accordance with this Code, shall# Q1 `/ J/ h) v* k! F
be examined as follows:) o6 C4 E/ r/ a2 S& Q5 D
79 1 ?4 q. f4 X8 c* T4 }$ L- ](a) Circumferential, longitudinal, and spiral groove1 _% ~7 b q* k1 e5 n& |# z
welds shall be 100% radiographed in accordance with$ h( {. u# r* O$ A5 @1 F2 [: T
para. 344.5 or 100% ultrasonically examined in accordance # x _" f Q$ f. [3 K8 xwith para. 344.6.% O' B( ^1 |$ @ F; d! g$ Y7 e
(b) All welds, including structural attachment welds,) i1 r- {) P3 e# a6 X* @9 H
not covered in (a) above, shall be examined using the , v; s; {" W; T. s; vliquid penetrant method (para. 344.4) or, for magnetic8 `6 i/ C; Z* R; V3 h4 ?0 ^' S; K
materials, the magnetic particle method (para. 344.3).
还有,就是同意用NDT替代压力试验了,我们还得选择探伤的方法,看工件的材质,接头形式,厚度,焊接方法等等,选择是用RT UT MT 还是PT. 象这样光说是热力管道,选择100%UT,我们应该是无法说他是正确,还是考虑不周.* o G$ x/ Z& M+ Q3 C' G
欢迎提不同的意见,大家探讨,以学习没目的