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Page 5 <br /> 4.4.5 Field Joints on Large Diameter Pipe <br /> 4,4.5.1 Tape should be applied in the usual spiral fashion <br /> and overlap to provide a double thickness on the <br /> joint. In areas where poor backfill (rocks., etc.) <br /> conditions exist, use sand or fine shading, a <br /> minimum of 4" in the trench base and a minimum of 8" <br /> over the pipe. <br /> 4.4,5.2 meld OTT-and other fittings that are wrapped with-: _;_- <br /> - tape will require extra care during application to=- <br /> . <br /> --prevent buckling and looseness of the wrap. <br /> Narrower tape is easier to apply to most ells and <br /> 3 other fittings. See Section 7. In areas where poor <br /> backfill.conditions exist, use sand or.fine shading, <br /> a minim*.� 4" in the trench base,-an&44,,minimum-of <br /> $" over the: pipe, <br /> 4.4-:6 Holiday Repair - Aspbalt Coating <br /> Smat}1 defects (less tharACross). - S1h damage <br /> the aspnat wrap <br /> and no-penetration has octdo ked may be rep&IF6d:by-a <br /> ingle patch. The surface=OL-4he asphalt wra=— - <br /> " =�shauld be <br /> 4tepared by remov the outsideiwtWa= <br /> .� <br /> �' #re_hr Prime an¢ appsingle°�la�[+er _ <br /> ' tape sothat it extends 2" in all directions beyond <br /> the damaged area. If penetration of the asphalt <br /> wrap has., urred o theme bond has.been btgken,.all laosewra# ng shall:be�d to •thewb'_ t , <br /> j 'The-areal 1 be pr#med: and two la # w <br /> 2 Large defRts (greater t'han�30 across) TP*ttie pipe <br /> coating is still bonded and penetration has not <br /> occurred, prepare the surface as above, prime:aud.. ._. <br /> w <br /> - 1 ompletely around-pipe. The edge�_Af thea <br /> extend 2" beyond the damage area. Ii <br /> has been=-pehetrated or has lost ids <br /> - :', ose or dasage4 coating shall be-rremoved , <br /> and twa rs of the -tape applied, `The" first layer" <br /> may be applied in a patch fashion with the second <br /> layer wrapping completely around the pipe, half <br /> ala in9,.f=double thickness :-as-specified #•L_ ._ - <br /> 4.4.7 Holiday Recce = P-listic or Tape Coating_ <br /> *4.4.7.1 On pTastirAr tape coated Ope, repairs-shall bi- <br /> - treated _a34ii large defect (described in. .; <br /> paragraph 4.4.6.2) by wrapping completely around the - <br /> pipe as required. All of the pipe-surface--to-be. <br /> coated shall be cleaned and primed.=- (See-paragraph_ <br /> 6.2 for exception. ) <br /> *Paragraph re numbered " <br /> IPG & K co. AMIIMG MUM <br /> "' .. si1EET 5 <br /> Of 4 SNEETs 086549 5 <br /> ' . -. <br />