API Rec comm mend ded P Practtice 1 1110 0 Recom mmende ed Practice for th he Presssure Te esting of Steel P Pipelines s for the Transp portation of Gas,, Petrole eum Gas, Haza ardous L Liquids, Highly Volatile e Liquids s, or Carrbon Dio oxide SIXTH EDITIION | FEBRUARY 2013 | 25 PAGES P | $95.00 0 | PRODUCT N NO. D11106
This RP app plies to all partts of a pipeline e or pipeline fa acility including lin ne pipe, pump station pipingg, terminal pip ping, compressorr station piping g, metering sta ation piping, delivery stattion piping, regulator station n piping, appurtenances connected d to line pipe, appurtenance es connected to t facility pipin ng, fabricated assemblies, valves, v tees, elbowss, reducers, fla anges, and an ny other pipelin ne equipment or appurtenan nces. This RP doe es not apply to o pumping unitts, compressor units, break kout tanks, pre essure vesselss, control pipin ng, sample piping, instrumen nt piping/tubin ng, or any component or piping systtem for which other codes specify pressure tessting requirem ments (i.e. ASM ME Boiler and Pressure Ve essel Code, pip ping systems covered c by building codes, etc.). Although this RP containss guidelines th hat are based on sound engin neering judgm ment, it is impo ortant to note that t certain gove ernmental requirements ma ay differ from the t guidelines presented p in th his document.. Nothing in this RP is intended to inhibit the use of enginee ering solutionss that are not cove ered by the RP P. This may be e particularly applicable where w there is innovative de eveloping technology. Where an alte ernative is offe ered, the RP may m be used, pro ovided any and all variations from the RP are identified an nd documente ed. This RP doe es not addresss piping system ms that are pressure tessted with natu ural gas, nitroggen, or air.
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Forr ordering inforrmation: Onlline: www.apii.org/pubs Phoone: 1-800-854-7179 (Toll-freee in the U.S. and Canada) (+1) 303 3-397-7056 (Local an nd Internationa al) Faxx:
(+1) 303 3-397-2740
applicable. APII members receeive a 30% disscount where a
Contents Page
1
Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2
Normative References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
3 3.1 3.2
Terms, Definitions, and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Terms and Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 4.1 4.2 4.3 4.4
Pressure Test Planning Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Guidelines for Planning a Pressure Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pressure Test Medium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Pressure Test Equipment and Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Location and Use of Test Measuring Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10
Pressure Test Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Qualification of Contractor and Operator Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Line Fill and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Initial Pressurization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The Test Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pressure Test Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Searching for Leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pressure Test Acceptance Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Depressurization, Displacement, and Disposal of the Test Medium. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Drying Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15 15 15 15 17 18 19 19 20 21 22
6 6.1 6.2 6.3
Pressure Test Records and Drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pressure Test Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pressure Test Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22 22 22 24
Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Figures 1 Impact of Test Pressure on Margin of Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2 Pressure–Volume Plot with Residual Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
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