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�) POW I00 - 1 i
<br /> the applicability of specific Irak -detection devices to pressure for it period of I hour. Lural luersdictions
<br /> maniloldcd tank systems , or individual manufacturers may require testing at
<br /> greater pressures to fnr longer periods . Ensure Ilial
<br /> aaa
<br /> 10 . 18 Vapor-Recovery Piping. Refer to PEI puhlica - the piping interstice is scaled Unci install U pressure;
<br /> tion KP3t111 . Rrcornrnrruhsrl l'rar •ur •r �.\ liar hnlcrllrNinn unci g, :tug, c to monitor the pressure in the piping inter-
<br /> *Fcvini0 of 1 �ipor - Ret nrcr t SYstenrs err Vehicle- File inn slice . A Irak is indicated hp an increase in pressure
<br /> Srrrti , lior insi :tllation and lcstin �, tcquircmcnt5 ati , ocialyd in the piping interslice . mann spccrrc tttslrnctirrns
<br /> \\ itlt \ apor- reco \ ery pipin, at vehicle - lucling ibcilities . pru \ ided by individual nr[ nufarturers ofIiherglass
<br /> 10 . 19 Water-Gauging Port. �1 'alerhnttnms Ihat rcm ;rin and Ilc \ ihle pipin�� .
<br /> in tart. , fnr Ion4t periods can compromise incl quality and
<br /> lank intekrily . To laciliiale " alcr detection and rcmrnal . WARNING: Isolate piping from tanks and
<br /> consulcr atstallint, the lank fill pipe at one end of the lank dispensers before air testing. Installation
<br /> and a ?- inch diameter riser a ith :t \ apor- tight locking cap of valves or extractor fittings provides a
<br /> all the npposilc end ol ' the tank , convenient means of isolation. Do not test
<br /> lines with air that have contained hazards
<br /> 10 . 20 Manhole Identification . All manholes should ous , flammable , or combustible liquids or
<br /> he rdcntilied to Protect ug, aiast cross - dropped lirel , mer- vapors unless they are purged and made
<br /> fills . and spills . safe beforehand. If purging is not feasible,
<br /> an inert gas such as nitrogen or helium
<br /> may be used to pressurize the piping.
<br /> 11 . TESTING PIPING 11 . 1 . 3 Monitoring During Construction . After
<br /> the initialnoduci - i pint, test is completed . It ► nig,
<br /> P Pp _ p [
<br /> of air pressure maty he maintained in the piping
<br /> 11.1 Testing of Product Piping. The folln\ving ser - provided the piping has not contained any pnrducl
<br /> tions descrihe test prue: c\ lures that should lie perlOnted or product \ apor~. If piping, has contained product
<br /> on ne\\ product piping and storage systems hefiire hark - or \ apors . an inert gas surlt as niUogen or ltchum
<br /> filling , declog construction , and heliorc pacing a system nuty he uud to prrasuri / e the piping . Monitoring
<br /> into operation . the pressure during suhuqucnt construction can
<br /> 11 .1 .1 Initial Piping Test for Single-Walled Pip provide :m early \\ arnin � of piping damage _ ! I'
<br /> ing. Aar test nc \t singlea, \\ alled product pipinc , d:unag,r is suspected , retest the lines .
<br /> or double -\\ ailed piping \\ here the primas pipe 11. 1.4 Post-Construction Testing. Immediately
<br /> can he soaped , at 50 psis or a [ the m :utufacturcr ' s before undereround product pipinc is placed intit
<br /> recommended test pressure for it pat tod of I hour. ser\ ice , conduct a hydrostatic test at 150 percent of
<br /> Local jurisdictions or indi \ ideal manufacturers the operating pressure* but not less than 50 psit, a
<br /> ntavrequire lestint, at greater pressures or for lun -
<br /> 41.
<br /> cer periods . Apply a soap solution to Ull fitting,, , 11.2 Testing Secondary-Containment Piping. Fhe
<br /> and piping surl 'aces , and inspect Iirr bubbles , Bolla \\ int, sections describe lest procedures that should he
<br /> Leaks arc indicaied by the lorniatiun of huhhles performed un neW secundUr} -containment piping, before
<br /> created h \ our escaping I'rnnt damaccd or dryer- harkfillirtc , during cnttstnrrtiun , and hefore placing it
<br /> [ i \ c piping ofaa
<br /> joints that arc improperly ti �,hiencd sNstcm into operation .
<br /> or assembled . A constant pressure -cause rcadint,
<br /> alone " ill not determine \\ hcthcr the piping,is 11.2.1 Initial Test for Secondary Piping. This
<br /> tight , but am loss in gaugc pressure should hr section applies it ) the te ; tint, of secondary product
<br /> carefully imesiit,aled . Fullkm specific in.struciions pipinc conutinntcnt . as deGnrd in Section Mal . Ayr
<br /> pro \ ided by indi \ idual ntanulacturcrs of Iiherclass lest Ill' \\' �el'Und :11 '1' piping for a period of I hour.
<br /> and flexible rut`, . usint, [ he test pressure prescribed by the piping
<br /> p p manufacturer. Apply it soap solution to all joints
<br /> 11. 1 .2 Initial Piping Test for Coaxial Piping. Air and piping sur Laces and inspect lit huhhles that
<br /> lest the print :uy pipe in cua \ i :d piping dhvsystems at indicate that a Irak is present , A constant pressure -
<br /> 50 prig or the ntanul 'acturer ' s recommended test trauge readint, ;dune \\ ill not deicrntine \\ paper
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