API 570 Questions 17

1.

The reco recom mmend mende ed down downst stre ream am limi limitt of circ circui uitt of an inje inject ctio ion n point is a minimum of: a)

b)

c)

d)

2.

!or e"te e"tern rnal al insp inspec ecti tion ons s for for poten potenti tial al co corr rros osio ion n under under insu insula lati tion on #$%&) on $lass 1 systems, the e"amination should include at least ''''''''''' percent of all suspect areas and  ''''''''''' percent of all areas of damaged insulation: a) b) c) d)

*.

Second Seco nd chan change ge in flow flow dire direct ctio ion n pas pastt the the inje inject ctio ion n poi point nt,, or or 25 feet beyond the first change in flow direction whicheer is less Seco Se cond nd chan change ge in flow flow dire direct ctio ion n pas pastt the the inje inject ctio ion n poi point nt,, or or 25 feet beyond the first change in flow direction whicheer is greater Seco Se cond nd cha chang nge e in flo flow w dire direct ctio ion n past past the the inj injec ecti tion on poi point nt,, or 25 inch inche es beyo beyond nd the the firs firstt chan change ge in flow flow dire direct ctio ion n whicheer is less Seco Se cond nd chan change ge in flow flow dire direct ctio ion n pas pastt the the inje inject ctio ion n poi point nt,, or or 25 inches beyond the first change in flow direction whicheer is greater

5(, 5(, 5, 25,

5 ** 5( 1(

!or $las $lass s 2 pipi piping ng,, the the e"t e"tent ent of $%& $%& insp inspe ectio ctions ns o on n a syste ystem m operating at + 5 ! will be #as a minimum) of: °

a) b) c) d) .

5 - o off dam damag age ed are areas as,, 5( 5( - of susp suspec ectt are areas as 5( - of of su suspec spectt are areas as,, ** ** - of of dam dama aged ged are areas as ** - dama damage ged d area areas, s, 5( - of susp suspe ect area areas s one of the aboe

&n the the /ar /arlo low w form formul ula a for for dete determ rmin inin ing g pipe pipe thi thic0 c0ne ness ss,, the the term term  S stands for: a. b. c. d.

&nte &ntern rnal al desi design gn gage gage pres pressu sure re of the the pip pipe e in in psi psi 3res 3ressur sure e des desig ign n str stren engt gth h for for inte intern rnal al pres pressu sure re,, in in inc inche hes s 4llo 4llowa wabl ble e uni unitt str stres ess s at at the the desi design gn temp temper erat atur ure, e, in in psi psi a"i a "imu mum m str strai ain n at the the ae aera rage ge oper operat atin ing g tem tempe pera ratu ture re,, in in psi

5.

6etermine the linear e"pansion #in71(( ft) of a carbon steel pipe between ( degrees ! and 5( degrees !. a. b. c. d.

9.

1(( 1(( 1(( 1((

ft ft ft ft

2(.(52  2(.29*  2(.21(  2(.25( 

4s per 43& 5(, in case of normal uniform corrosion, compared to other piping. The thic0ness measurements on ales: a.

b.

c.

d.