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dated as worst-rase biaxial. Furthermore, the Iow received from Dr.Catherine Aimonc of New Mexico
<br /> frequency (and potentially higher strain-producing 'Itch as well as citizens of Indiana.
<br /> - vibration) found here (5.6 1-1-4 is about as low as REFERENCES
<br /> could be expected for such close-in blasting(ref.9). 1. O'Rourke. M. Wing. L. R. L. >v„:1nuA KV1212_r n„r u
<br /> on the other hand, the pipeline may not et be full
<br /> Et itelinz - Pt . of the MC C;cotcchnt. l Engineering DivWun
<br /> coupled after only 6 months in the ground. The Soil Paxdclna CA Junel`9�8Farthytelkc Engineering and Soil Dynamics,
<br /> over the pipelines was softer than nearby undis- 2.Huff,W L.1:1+cS-Diamcmt!<)rr Rc_scutb Coss,nr czr
<br /> curbed ground even after six months•- iliail�R);LS11Ldc, i1:t t�xx V. Phase 3. U. S. army Engineer
<br /> BIAS Criteria For PVC W-79-6a):c Experiment Station, Structures Ial�tlruory. Report WES 7'R
<br /> C Pi line SL-79-6.Vicksburg,MS,September 1972
<br /> Unlike the steel pipeline, the specified maximum 3.Wcalnc,A S..Erparrt.P.A.Wenzel,A.H.Analysis. TFalnn nr
<br /> pressure produces far less hoop stress than 72 pct of�°� "' >tltrl. n lye nettmlu . Southwest Research
<br /> SMYS cable 5). It is likely that there is some other A�ssociatiott.July 1c978. Pi lint Research Committee of Amcrf4ut oil
<br /> limiting factor, such as the couplings. The strain cor 4. Esparta, E. D., wisdine,R 5., Wenzel.A. ti.L'iUSjln.Rc. +� t
<br /> responding to the maximum operating pressure of tsurl1 Explosive Uetaa+lyj, vol. I.-Summary Report. Southwest
<br /> responding on nt is o the Research institute. Final Report. A,G,A. Project PR-15-102 SwR1
<br /> pin/in, contrasting strongly with Project 02-5567 for the Pipeline Research Committee.of American Gas
<br /> the yield failure strain of 17500 lain/in. Again, a n:sxlatlon,August 1981.
<br /> rough estimate of particle velocity is possible from
<br /> S. Faparrt, E. 0.piwllr�e ne)nsr to)3►;'sj In Rack, Southwest
<br /> Research inalntte,FInai Report,A.G.A.Project PR 15-712.SwRI Project
<br /> the strain figures and a doubling for circumferential 06-1609 for the Pipeline Research Committee. of American (',ts
<br /> strain, which was not monitored on the PVC. (In ret- Association,September 1991.
<br /> rospect, it would have been better to forgo some up 6. Enron Gas Pipeline Group. Alicny;,hIc I3ht!jog Nctr i)utiCtj
<br /> win s.Engineering Standards 7152 April I988.
<br /> longitudinal gages for additional circumferential 7 Dowding, C. H. jj Vthrulun rvtr pit>rIOg and Control.
<br /> ones) Assuming a strain equal to 5 pct of that pro• Prentice-t3a1t. 1985.
<br /> diced by pressurization, or 1.35 pct that of yield, R•5laktnd, 1D F..Stagg,M,S,Blast Report n Investigations War And.
<br /> and the w altucntrc PourKt bons,IauMines Report of Investigations Sic O 1985.
<br /> worst case maximum strain envelope (from s Siskind. El E.. Crum, S. v, Oucrncss, R. E., Kopp,
<br /> fig. 7), the corresponding peak particle velocity ramo:tntivc�ntdv or 414- Ernnilndti l0it Surface Coal Minot
<br /> t Vibrations a L
<br /> would be about 10 in/s, Because of the lack of actu-
<br /> DuMines Report Invc58�uions 1226, I)S9
<br /> al circwnferential strains, this level should be fur- TAis article is hebtrl reprinted front rho iSLG WV Annual Canfcrrencc on
<br /> tact reduced until more data are available. Possibly, Sxptosa.,s ante i81„ tang re�•l ntytk'x heLP:-(tisc,y 1993. l►, s to otdR°•
<br /> users of PVC pipe have an environmental criterion 1 tar t rlfun Soc Society tof L cal�etucs�Ertl;!avert nr tbudutllt trsland/r r/Pith-
<br /> similar to the 18 pct SMYS suggested for steel. unbars Vito Journal or txpitnivt s Engineering.Row ruspomses,In tlx:form t f•
<br /> CONCLUSIONS laturr to(be Cdltox art uncouraguf. >JEE<
<br /> This paper describes a study of full-scale blast- The Smallest Single
<br /> ing near pressurization pipelines and contains an g
<br /> preliminary analysis of results. The authors expect Circuit 130 Detonator
<br /> to provide an additional comprehensive report Blasting Machine Available'
<br /> (BuMines RI, likel)0 with all measurements, addi-
<br /> tional analyses, and comparisons with ocher analyti-
<br /> cal studies and predictions. In the interim, it is sug- FIRES 130
<br /> gested that this 5 in/s be permitted for large mine ELECTRIC
<br /> blasts at Class B or better steel pipelines. Also those DETONATORS
<br /> of Class 6 or better PVC. Jr is suggested that this cri- "�'�' "''- �` Commercial or
<br /> tenon not be applied at construction sites if experi- 1.A ..:,ra. • ilitar , 1 ohm,
<br /> ence has shown that higher particle velocities are �.: �= = - . iced n a eingle
<br /> tolerable. Also,in the interim,no adjustment is need- " art✓;{tes, based on
<br /> eel for pipeline :,•:. :a, l-
<br /> pipeline age assuming the protective coating ,. - i
<br /> FIR .�.v ,.. In 5 ms.
<br /> is intact and unless the pipeline is known to be at r -P . * tr �. 'd
<br /> higher risk from previous damage or other cause. """'' / '� +:
<br /> ACKNOWLEDGEMENTS z '''�f,C, fit'£:� ..4,'..",4 .-,
<br /> The authors wish to thank AMAX and particular- .•, . ;`, ,'&t.,,.,•,,;.8
<br /> ly John Brown for planning - '�" `
<br /> p g and sponsoring this • Pocket Size:4.1 x 13" x 3.6" • Light Weight: 10 oz. (0.3 kg.)
<br /> study John Wiegand of Vibronics provided invalu- (10.5 x 3.4 x 9.0 cm.)
<br /> able field assistance with his own monitoring pro- •anviroams corrosion Scant nylon Water
<br /> • Reliable: discharge Blasting until will and Charge: -3ssecot nylon gene
<br /> gram and shared his data generously. Willard Pierce charged to design voltage fully • Fast uhnrge: 1.9 second charge
<br /> Ume using one
<br /> of the Indiana Department of Natural Resources, at alkaline battery
<br /> Over 2S
<br /> Division of Reclamation,assisted in the planning and models available starting a! 5260.00
<br /> execution as well as monitoring activities from the RESEARCH ENERGY OF OHIO, INC:
<br /> regulatory standpoint. Ohio Valley Pipeline installed 10319 19 Road • Huron,Ohio 44539
<br /> the test sections and �t;xas Gas Transmission Phone:(419)433.8103 •Fax:(419)s33-5728
<br /> Company provided useful suggestions, sections of 25 Laing^cax/a systems,testers,accepted toe a sserka.°nriel
<br /> Dtastlrt
<br /> pipes and test results. Suggestions were also international Inquiries Welcome
<br />
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