Pipeline Explosion at Henderson, NV - PowerPoint Presentation

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Pipeline Explosion at Henderson, NV - PPT Presentation

Pipe Crushing amp Rupture Presented by T Kim Parnell PhD PE Parnell Engineering amp Consulting PEC wwwparnellengcom wwwlinkedincominparnellpec kimparnellstanfordalumniorg ID: 253128

www parnell eng kim parnell www kim eng org stanfordalumni linkedin parnellpec pipeline gas pipe natural amp section due

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Slide1

Pipeline Explosion at Henderson, NVPipe Crushing & Rupture

Presented by:T. Kim Parnell, PhD, PEParnell Engineering & Consulting (PEC)www.parnell-eng.comwww.linkedin.com/in/parnellpeckim.parnell@stanfordalumni.org

Reference:

“

Analysis of the Dynamic Response of a Buried Pipeline due to a Surface Explosion,

”

Computational Aspects of Impact and Penetration

, L. E.

Schwer

and R. F. Kulak, eds.,

Elme

Press International, 1991 (with R. D.

Caligiuri

).Slide2

kim.parnell@stanfordalumni.org www.parnell-eng.com www.linkedin.com/in/parnellpec2

IntroductionOverview of IncidentNatural Gas Pipeline DetailsFinite Element Analysis of Pipe CrushingSummaryOutline of PresentationSlide3

kim.parnell@stanfordalumni.org www.parnell-eng.com www.linkedin.com/in/parnellpec3

T. Kim Parnell, PhD,PE - BiographyT. Kim Parnell, Ph.D.,P.E. is Principal & Founder of Parnell Engineering & Consulting (PEC). Kim holds Ph.D. and MSME degrees in Mechanical Engineering from Stanford University, a BES from Georgia Tech, and is a registered Professional Mechanical Engineer in the State of California. Kim is a Senior Member of IEEE, a Fellow of ASME, and SAE Member. Kim was 2011 Chair of the IEEE Santa Clara Valley Section (IEEE-SCV) with over 12,000 members and Past-Chair of the IEEE Consultants' Network of Silicon Valley (IEEE-CNSV).Dr. Parnell served on the Mechanical Engineering faculty at Santa Clara University teaching materials, design, and manufacturing applications. He currently participates as a Lecturer in the Stanford Composites Design Program. He works extensively in Composite material issues including Damage, Delamination, and Failure. Dr. Parnell is active in areas such as alternative energy, finite element analysis, robust design, and the use of computer simulation to achieve better designs in shorter time. He frequently works in medical devices and is an expert in the areas of failure analysis and accident investigation, and uses this expertise to help develop more reliable product designs. He has extensive experience in the analysis and simulation of structures, heat transfer, and fluid flow using finite elements and other numerical procedures..Dr. Parnell was recently at MSC.Software

Corporation as Senior Manager in the Product Management group. He was the MSC Product Manager for Fatigue and Wind Energy. Before starting PEC, Kim was at Exponent Failure Analysis Associates (Senior Manager),

Rubicor

Medical (R&D Director), SST Systems, ATT Bell Laboratories, Stanford University and General Motors. He also was appointed as a Visiting Associate Professor in the Mechanical Engineering Department at Stanford University, teaching graduate courses in Mechanics. Slide4

4The PEPCON Incident

Fire and massive explosions at the PEPCON plant in Henderson, NV on May 4, 1988. PEPCON produced Ammonium Perchlorate (AP) – an oxidizerCombination of events:Large quantity of AP on site due to Challenger disaster16” natural gas line running under the plant (with leaking stitch welds)Slide5

5PEPCON Explosions

Two large explosions equivalent to 200 Tons and 500 Tons of TNT (3.0 and 3.5 on the Richter scale)Over $70M property damage; windows broken up to 30 miles away16” Natural Gas PipelineRuptured 40 foot sectionCrushed more than 260 feetLong-term leakage prior to blast from poor stitch weldsSlide6

Fire & BrimstoneRapid spread of fire; catastrophic explosionMost of event captured on videoSlide7

7Massive Explosion & Shockwave

Stills from video shot from Black Mountain – over 10 miles away

See link to separate video of blastSlide8

8Aerial View - Before & After

Before

AfterSlide9

916” Natural Gas Pipeline

Ran near the plant property boundary Ruptured 40 foot sectionCrushed more than 260 feetLong-term leakage prior to blast from poor stitch weldsBig Question: Did the pipe rupture occur before or after the explosions??Slide10

10Pipeline Section IdentificationSlide11

11Ruptured Gas Pipe – Initial ViewSlide12

12Pipe After Some DiggingSlide13

Pipe After Complete ExcavationSlide14

14Gas Pipe

Ruptured & Crushed SectionsSlide15

15Pipe – Crushed SectionsSlide16

16Plant BuildingsSlide17

17Production EquipmentSlide18

18Transient Finite Element Analysis of Pipe Crush due to Blast

To Address the Big Questions: Did the pipe rupture occur before or after the explosions??Was the natural gas pipeline leaking and depressurized prior to the blast?Slide19

Pipe/Soil Model

kim.parnell@stanfordalumni.org www.parnell-eng.com www.linkedin.com/in/parnellpec19Slide20

Pipe Crushing Due to BlastResponse Sequence #1

kim.parnell@stanfordalumni.org www.parnell-eng.com www.linkedin.com/in/parnellpec20Slide21

Pipe Crushing Due to BlastResponse Sequence #2

kim.parnell@stanfordalumni.org www.parnell-eng.com www.linkedin.com/in/parnellpec21Slide22

Pipe Crushing Due to BlastResponse Sequence #3

kim.parnell@stanfordalumni.org www.parnell-eng.com www.linkedin.com/in/parnellpec22Slide23

Pipe Crushing Due to BlastResponse Sequence #4

kim.parnell@stanfordalumni.org www.parnell-eng.com www.linkedin.com/in/parnellpec23Slide24

Pipe Crushing Due to BlastResponse Sequence #5

kim.parnell@stanfordalumni.org www.parnell-eng.com www.linkedin.com/in/parnellpec24Slide25

Pipe Crushing Due to BlastResponse Comparison

Pressurized: Pi=300psiUnpressurized: Pi=0psikim.parnell@stanfordalumni.org www.parnell-eng.com www.linkedin.com/in/parnellpec25Slide26

Pepcon Site: Aerial View Pre-Incidentkim.parnell@stanfordalumni.org www.parnell-eng.com www.linkedin.com/in/parnellpec

26Slide27

Pepcon Site: Aerial View Post-Incidentkim.parnell@stanfordalumni.org www.parnell-eng.com www.linkedin.com/in/parnellpec

27Slide28

Pepcon Site after Incidentkim.parnell@stanfordalumni.org www.parnell-eng.com www.linkedin.com/in/parnellpec

28Slide29

Pepcon Site after Incidentkim.parnell@stanfordalumni.org www.parnell-eng.com www.linkedin.com/in/parnellpec

29Slide30

Pipeline-Unstable Crack Growth

16-inch underground natural gas line300 psi internal pressurePoor quality welds (ERW pipe)Fast fracture of a 40-ft. section after initial weld defects grew through fatigue to critical sizeResulting fire & explosions demolished the plant30

kim.parnell@stanfordalumni.org

www.parnell-eng.com

www.linkedin.com

/in/

parnellpecSlide31

Natural Gas Pipelinekim.parnell@stanfordalumni.org www.parnell-eng.com www.linkedin.com/in/parnellpec

16” Natural Gas Pipeline

40’ Ruptured Section

Electric Resistance Weld (ERW) showed stitching and lack of fusionSlide32

Natural Gas Pipelinekim.parnell@stanfordalumni.org www.parnell-eng.com www.linkedin.com/in/parnellpec

16” Natural Gas Pipeline

40’ Ruptured Section