Test Procedure for Gas Line (3)

8/12/2019 Test Procedure for Gas Line (3)

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RIYADH BLOCK C, D & F

POWER PLANT PROJECT

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Doc.#TA XXXJ.1M006Rev. A

PRESSURE TEST , BLOWING OFF/DRYING AND

NITROGEN PURGING PROCEDURE ON PIPING SYSTEM


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1.0. TITLE

Pressure Test, Blowing O !n" itrogen Purging Proce"ure on $i$ing s%ste&.

2.0. SCOPE

T'e sco$e o $ressure test $roce"ure s'!ll (e !$$lie" on uel g!s $i$ings%ste& to "eter&ine w'et'er t'e $ressure)ret!ining w!lls !re le!*)tig't w'ene+$ose" to t'e test $ressure !n" w'et'er !n% "eor&!tions occur w'ic' !recritic!l.

.1 -or st!inless steel lines ro& -uel 'e!ter to !s &o"ule

Met'o"/ Pneu&!tic Test

euence o $neu&!tic test or st!inless lines/

2 Air Blowing $ressure test "e $ressuri3e t'e line itrogen $urging 4

. -or 5!r(on steel lines ro& 100 u$ to A(solute ilter

Met'o"/ 7%"rost!tic Test

euence o '%"rost!tic test or c!r(on steel lines/

2 7%"rost!tic test De $ressuri3!tion Blowing o until cle!n st!ins 4

3.0. REFERENCE DOCUMENT

8.1 5ontr!ctu!l reuire&ents8. AM9:A; B 81.1

.0. APPLICABILITY

T'is Proce"ure s'!ll (e !$$lie" or t'e Pressure Test !s $er Be&co.


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>. T'e $ressure test s'!ll (e $eror&e" or $i$e line, v!lve?s@?g!te:glo(e:c'ec*:control v!lve in o$en $osition@ e+ce$t /instru&ent:tu(ing.

".0. TEST METHODS

T'e test &et'o"s s'!ll (e !s ollows/

6.1 7%"rost!tic test or c!r(on steel $i$ing !s "et!ile" seuence .1

6. Pneu&!tic test or st!inless steel $i$ing !s "et!ile" in seuence .

#.0 HYDROSTATIC TEST

.1 Pre$!r!tor% Cor* or 7%"rost!tic Test

.1.1 5le!n C!ter s'!ll nor&!ll% (e use" !s t'e test &e"iu&.

.1. ents s'!ll (e $rovi"e" !t 'ig' $oints o t'e $i$ing s%ste& to $urge!ir $oc*ets w'ile t'e s%ste& is (eing ille" wit' w!ter. Eoosening ol!nges '!ving ! &ini&u& o our (olts &!% $rovi"e venting "uring t'eilling.

.1.8 5'ec* s!et% $rec!utions.

. Peror&!nce o 7%"rost!tic Test

..1 T'e test $ressure s'!ll (e continuousl% &!int!ine" or ! &ini&u& ti&eo one 'our !n" &!% t'en re"uce" to t'e "esign $ressure !n" 'el" orsuc' ti&e !s &!% (e necess!r% to con"uct t'e e+!&in!tion or le!*!ge

.. Access to t'e $rotective !re! onl% !ter e+$ire" 'ol"ing ti&e !n""ecre!se o t'e test $ressure to t'e &!+i&u& !llow!(le wor*ing$ressure, visu!l e+!&in!tion on t'e wel"ing se!&s.

..8 9+!&in!tion or le!*!ge s'!ll (e &!"e on !ll Foints !n" connections.

.0 P9GMAT;5 T9T

.1 C'en s%ste&s !re to (e in service w'ere tr!ces o t'e testing &e"iu&c!nnot (e toler!te" or w'en $i$ing s%ste& !re so "esigne" t'!t t'e%c!nnot (e ille" wit' w!ter $neu&!tic test &!% (e "one

. T'e g!s use" !t t'e test &e"iu& s'!ll (e non l!&&!(le !n" non to+ic

.8 T'e $neu&!tic test $ressure s'!ll not e+cee" 1. ti&es t'e "esign$ressure o t'e s%ste& &ulti$le (% t'e lowest r!tio o t'e stress v!lve or

test te&$er!ture to t'e test te&$er!ture to t'e stress v!lve !t t'e "esignte&$er!ture


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. T'e $ressure in t'e s%ste& s'!ll gr!"u!ll% (e incre!se" to not &ore t'!none '!l o t'e test $ressure, !ter w'ic' t'e $ressure in t'e s%ste& s'!ll(e incre!se" in ste$s o !$$ro+i&!tel% one tent' o t'e test $ressure untilt'e reuire" test $ressure '!s (een re!c'e"

.> T'e test $ressure s'!ll (e continuousl% &!int!ine" or ! &ini&u& ti&e o1> &inutes. ;t s'!ll t'en (e re"uce" to less t'!n t'e "esign $ressure or100 $sig H 00 I$! ?g!ge@ !n" 'el" or suc' ti&e !s &!% (e necess!r%to con"uct t'e e+!&in!tion or le!*!ge

.6 9+!&in!tion or le!*!ge "etecte" (% so!$ (u((le or euiv!lent &et'o"

s'!ll (e "one or !ll Foints !n" connections

$.0 BLOWING OFF / DRYING

K.1 Cor* 9+ecute" Beore Blowing Out.

K.1.1 ; no v!lves "irect to !t&os$'ere !re !v!il!(le, suit!(le (low)outo$enings &ust (e &!"e or t'is $ur$ose !t suit!(le $oints (%"isconnecting l!nge connections or (% "is&ounting v!lves.

K.1. ; $i$ing is (lown out u$ to t'e inter)connecting no33le o ! &!c'ine, t'eo$enings o suc' no33le &ust (e covere" wit' "iscs o s'eet &et!l to

!voi" entr% o "irt, w!ter, etc.

K.1.8 All v!lves o$ene" "uring (lowing)out o$er!tion &ust (e ull% o$ene"(eore closing !g!in, to $revent v!lve intern!ls ro& (eing "!&!ge" (%oreign "e(ris.

K.1. ;t is not !llowe" to (low out s!et% v!lve lines t'roug' t'e s!et% v!lve.T'e s!et% v!lve &ust (e "is&!ntle".

K. Blowing)out Proce"ure

K..1 Pi$ing !re (lown)out wit' !ir ro& t'e $rocess !ir co&$ressor. Blowing)out is "one section (% section ?'e!"er to tur(ine unit (% unit@ !n" (egins

!t t'e !ir co&$ressor. T'is (low)out $roce"ure &ust (e re$e!te" sever!lti&es !n" t'en (e continue" wit' !not'er section until t'e entire $i$ing'!s (een (lown out.

K.. T'e !ir co&$ressor will $ressuri3e t'e $i$e lines u$ to 10 (!r, 'ol"ing t'e$ressure or ! w'ile, !n" wit' r!"io co&&unic!tion, t'e $ressure will (erele!se" (% t'e o$ening v!lve.

K..8 Acce$t!nce criteri! or t'e (lowing out !n" "r%ing t'e lines/ w'en ! w'iteclot' is $ut !t t'e o$ening v!lve !n" it '!s (een o(serve" cle!n !n" "r%,it will "ict!te i t'e wor* is !lre!"% s!tis!ctor%.

10.0 NITROGEN PURGING


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10.1 Cor* to (e e+ecute" $rior to Purging:Ee!* Testing (% Air 5o&$ressor

10.1.1 5'ec* l!nges !n" soc*ets wit' le!*!ge "etection s$r!% ?so!$% w!ter@or ! le!*!ge "etector, in c!se t'e l!nge Foint c!n

Test Procedure for Gas Line (3)

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