Large Steel Seamless Pressure Vessels

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Large Steel Seamless Pressure Vessels
CPI

• Kevin Collins
• National Center of Manufacturing Sciences
• March 9, 2005
• Dearborn, MI

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Overview

• CP Industries manufactures large seamless
  pressure vessels for the storage of gases under
  high pressure.
• Pioneered the development of high pressure
  cylinders.
• ASME
• DOT
• Military
• ISO

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Applications

• Transportation of Industrial Gases
• Ground Storage of Industrial Gases
• Compressed Natural Gas Fueling Stations
• Mother - Daughter Projects

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Tube Trailer
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Applications

• Transportation of Industrial Gases
• Ground Storage of Industrial Gases
• Compressed Natural Gas Fueling Stations
• Mother - Daughter Projects

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Ground Storage
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Applications

• Transportation of Industrial Gases
• Ground Storage of Industrial Gases
• Compressed Natural Gas Fueling Stations
• Mother - Daughter Projects

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ISO Container
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Manufacturing Process

• Raw Material is Seamless Pipe
• End Domes are Hot Forged Spun or Hammered
• Heat Treated - Liquid Quench Temper
• Grit Blast and Condition O.D.
• Machine Necks with I.D. and O.D. Threads
• Grit Blast and Condition I.D.
• Vacuum, Steam Clean Dry I.D.
• Install End Plugs
• Solvent Wash and Paint
• Purge with Dry Nitrogen
• Assemble

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Quality and Inspection Process

• All Pipe is Ultrasonic Tested
• Properties are Tested from Test Ring
• Yield Tensile Elongation
  Charpy V Notch
• Brinell Hardness Tests
• O.D. is Magnetic Particle Inspected
• Machined Threads are Dye Penetrant Tested
• Hydrostatic Test
• Final Ultrasonic Inspection
• Assemblies are Air Tested
• Inspections and Testing Witnessed by Independent
  Agencies

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Specifications

• Design specification is contingent on what gas is
  used and how it is used.
• Hydrogen - Ground
• ASME UPV Code Section VIII Div 1 Newest
  Version Current Addenda and Appendix 22
• Material - ASME SA 372 Grade J Class 70
• Hydrogen - Transported DOT - 3AAX - 6000
  (Pressure)
• Material - AISI 4130X

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Concerns

• Hydrogen is Difficult to Store Efficiently
• Requires Higher Pressures than Other Gases
• Higher Pressure Results in Smaller O.D.s and
  Thicker Walls
• More Difficult to Attain Required Properties

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Solutions

• CPI working with ASME and Compressed Gas
  Association
• Working Committees have Been Formed to Address
  Hydrogen Storage
• Research Laboratories such as Sandia National
  Laboratories are Testing Materials

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Hydrogen Storage