Professional Training and Consultation API 570 PREPARATORY 19 – 24 Feb 2005, Dammam
POINTS TO RECALL (DAY 1) 1.
API 570 570 Code Code is is appl applic icab able le for for ins inspe pect ctio ion, n, rep repai airs rs,, alte altera rati tion on and and re-rating of i!"e#$i%e , metallic piping.
2.
ASM ! "1." ASM "1." pipi piping ng is #sed #sed for for con const str# r#ct ctio ion n of of e& 'i'i installation.
".
$e%i $e%ise sed d edi editi tion on and and add adden enda da of AP APII and and AS ASM M Code Codes s ma& ma& be be #sed from beginning 'it( date of iss#e. !#t t(e& become mandator& from ) mont(s after iss#e date.
*.
+abl +able e A-1 A-1! ! of of ! "1." "1." Code Code gi%e gi%es s 'eld 'eld oin ointt #a #ali lit& t& fact factor or for for man#fact#red pipes. +(e factor can be increased for lectric #sion 'elded pipes b& cond#cting additional radiograp(& /spot or f#ll as per +able "02.".*.
5.
Minim#m re#ired t(icne ness /tm for a pipe of o#tside diameter /, made from material (a%ing safe stress /S and s#bected to internal press#re /P is gi%en b&3 t m
'(ere
).
=
PD 2( SE + PY )
+
C
4 'eld oint factor 4 material co-efficient /+able "0*.1.1 C 4 corrosion and ot(er allo'ances
Ma6im# Ma6i m#m m allo allo'ab 'able le inter interna nall pre press ss#r #re e for for a pip pipe e for for gi%en gi%en meta metall t(icness is 'ored o#t b& s#bstit#ting nett t(icness in !arlo' form#la and calc#lating t(e re#ired internal Press#re /P. /ett t(icness 4 A%ailable +(icness 8 Corrosion Allo'ance
Professional Training and Consultation API 570 PREPARATORY 19 – 2 !e" 2005# $a%%a%
POI&T' TO RECA(( )$AY 1* 7.
+(icness of a permanent blan for t(e pipe is gi%en b&3 t m
=
dg
3 P 16 SE
+
C
9(ere, dg 4 t(e inside diameter of gaset :.
;&drostatic +est pr 4 1.5
× esign
pr 6 stress ratio
Stress ratio is ratio of material stress at test temp to t(e stress at design temp. Stress ratio is al'a&s greater t(an or e#al to 1. <. Pne#matic test pr 4 1.1 6 esign pr #ring pne#matic test a press#re relief %al%e /'it( set pr = 1.1 6 +est pr. s(all be installed. Press#ri>ation s(o#ld be in steps. Initiall&, press#re s(all be slo'l& increased to 25 psi or 50? of test press#re /'(ic(e%er is lo'er. C(ec for leaage, if an&, and correct t(em. +(ereafter, t(e press#re s(all be increased in steps #p to t(e f#ll press#re. Inspection s(all be carried o#t at esign Press#re. 10.
;&drostatic test is preferred o%er Pne#matic test. +(e b#tt oints '(ere ;&dro or Pne#matic test can not be performed, 100? $+ or @+ ma& be done on b#tt 'elds, and P+ or M+ ma& be done on ot(er 'elds /branc( 'elds, fillet 'elds, etc. as alternati%e to ea testing.
11.
If temperat#re 8 t(icness combination falls on or abo%e t(e material c#r%e /ig. "2".22, impact testing is B+ re#ired. /If belo' t(e c#r%e 8 impact testing is re#ired
12.
or impact testing " specimen are re#ired. If t(e a%erage of " specimen 4 $e#ired A%erage and Dal#e of onl& /var/www/apps/conversion/tmp/scratch_3/236948040.doc 7/4/2014 8:01:06 a7/p7
Page 2 of 3
Professional Training and Consultation API 570 PREPARATORY 19 – 2 !e" 2005# $a%%a%
POI&T' TO RECA(( )$AY 1* one specimen is less t(an a%erage b#t more t(an minim#m for one specimen E Accept 1".
If a%erage of " specimen 4 Minim#m for one specimen and a. Dal#e of one specimen is less t(an a%erage and also less t(an minim#m for one specimen E $etest b. Dal#e of t'o specimen is less t(an a%erage E $etest After retest, all specimen m#st (a%e %al#e > = vera!e "a#$e
1*.
+able ""0.1.1 gi%es re#ired and recommended pre-(eat temperat#re. $ecommendation becomes re#irement if ambient temp is F 0 G C.
15.
In dissimilar pipe oints (ig(er temperat#re of t(e t'o is to be #sed for pre-(eating.
1).
P9;+ +able /""1.1.1 gi%es temperat#re range, minim#m time and ma6im#m (ardness %al#es. ;ardness s#r%e& s(all be done for 10? samples for f#rnace P9;+, and 100? for local P9;+.
